U.S. patent application number 10/819543 was filed with the patent office on 2004-09-30 for laser line generation device with attachment base.
This patent application is currently assigned to Irwin Industrial Tool Company. Invention is credited to Levine, Steven R..
Application Number | 20040187327 10/819543 |
Document ID | / |
Family ID | 33544179 |
Filed Date | 2004-09-30 |
United States Patent
Application |
20040187327 |
Kind Code |
A1 |
Levine, Steven R. |
September 30, 2004 |
Laser line generation device with attachment base
Abstract
A line generating device comprising a housing with a support
structure that substantially extends along a first plane, a light
source mounted within the housing, and a lens that receives light
and projects the light in the shape of a fan, wherein the fan lies
substantially within a second plane that intersects the first plane
at an angle. The device also includes at least one reference level
on an outside of the housing.
Inventors: |
Levine, Steven R.;
(Mooresville, NC) |
Correspondence
Address: |
David W. Okey
BRINKS HOFER GILSON & LIONE
P.O. BOX 10395
CHICAGO
IL
60610
US
|
Assignee: |
Irwin Industrial Tool
Company
|
Family ID: |
33544179 |
Appl. No.: |
10/819543 |
Filed: |
April 7, 2004 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10819543 |
Apr 7, 2004 |
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10612035 |
Jul 1, 2003 |
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10612035 |
Jul 1, 2003 |
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10465534 |
Jun 18, 2003 |
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10819543 |
Apr 7, 2004 |
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10141392 |
May 7, 2002 |
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6735879 |
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60291135 |
May 15, 2001 |
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Current U.S.
Class: |
33/286 |
Current CPC
Class: |
G01C 15/004 20130101;
G01B 11/26 20130101; Y10S 33/21 20130101; G01C 15/002 20130101 |
Class at
Publication: |
033/286 |
International
Class: |
G01C 015/00 |
Claims
What is claimed is:
1. A line generating device, comprising: a housing comprising a
support structure that substantially extends along a first plane; a
light source mounted within the housing; a lens that receives light
and projects the light in the shape of a fan, wherein the fan
substantially lies within a second plane that intersects the first
plane at an angle; a reference level on an outside of the housing;
and. an adhesive for mounting to the support structure for mounting
the device to a surface.
2. The device of claim 1, wherein the adhesive is selected from the
group consisting of an adhesive, adhesive tape, adhesive putty, a
pressure-sensitive adhesive, and an adhesive strip.
3. The device of claim 1, wherein the support face further
comprises at least one of a notch and a bore.
4. The device of claim 1, further comprising a switch on an
exterior of the housing.
5. The device of claim 1, further comprising a second reference
level that is at a right angle to said reference level.
6. The device of claim 1, wherein the support structure further
comprises a recess on a bottom of the device.
7. The device of claim 1, wherein the adhesive protrudes from a
bottom surface of the device.
8. The device of claim 1, wherein the adhesive further comprises a
liner.
9. The device of claim 1, wherein the adhesive is a removable
pressure sensitive adhesive comprising an inner portion attached to
the support structure and an outer portion releasably attached to
the inner portion.
10. The device of claim 1, further comprising at least one pin for
mounting the device to a surface through a bore in the bottom of
the device.
11. The device of claim 1, wherein the housing pivots about an axis
perpendicular to the first plane.
12. The device of claim 11, wherein the housing pivots about an
axis perpendicular to the second plane.
13. The device of claim 1, wherein the housing pivots about an axis
perpendicular to a third plane that intersects the first plane at a
second angle.
14. The device of claim 1, wherein the housing pivots about an axis
perpendicular to the second plane.
15. A line generating device, comprising: a housing; a support
structure attached to the housing, the support structure comprising
an external adhesive for supporting the device on a surface; a
light source mounted within the housing; a lens receiving light
from the light source; and an aperture on an outside of the housing
for emitting light.
16. The device of claim 15, further comprising two reference levels
mounted at right angles on the housing, wherein an exterior of the
housing comprises a hand grip area and a switch.
17. The device of claim 15, wherein the support structure is
integral with the housing.
18. The device of claim 15, wherein the light source comprises a
laser light source.
19. The device of claim 15, wherein the light source comprises a
laser light source with a wavelength of about 635 nm.
20. The device of claim 15, wherein the light source generates
light in the shape of a fan.
21. The device of claim 15, wherein a bottom surface of the housing
of the line generating device further comprises at least one of a
notch and a bore.
22. The device of claim 15, wherein the housing further comprises
side surfaces that are substantially planar and perpendicular to
the support structure.
23. The device of claim 15, wherein the support structure
substantially extends along a first plane and the device generates
a fan-shaped beam of light that substantially lies within a second
plane that intersects the first plane at an angle.
24. The device of claim 15, further comprising at least one pin for
mounting the device to a surface through a bore in the support
structure.
25. The device of claim 23, wherein the housing pivots about an
axis perpendicular to the first plane.
26. The device of claim 25, wherein the housing pivots about an
axis perpendicular to the second plane.
27. The device of claim 23, wherein the housing pivots about an
axis perpendicular to the second plane.
28. The device of claim 23, wherein the housing pivots about an
axis perpendicular to a third plane that intersects the first plane
at a second angle.
29. A light generating device, comprising: a housing comprising a
support structure that substantially extends along a first plane; a
laser light source mounted within the housing; a lens that receives
light and projects the light substantially within a second plane
that intersects the first plane at an angle; a reference level on
an exterior of the housing; and an adhesive attached to the support
structure for mounting the device to a surface, wherein the support
structure comprises an inner portion and an outer portion that
rotate and swivel with respect to one another.
30. The device of claim 29, wherein the inner and outer portions
have matching curved surfaces.
31. The device of claim 29, further comprising a second reference
level.
32. The device of claim 29, wherein the support structure further
comprises a recess for mounting the adhesive.
33. The device of claim 29, wherein the support structure includes
a bore or a notch.
34. The device of claim 29, wherein the lens is cylindrical.
35. The device of claim 29, wherein the adhesive is a removable
pressure-sensitive adhesive.
36. The device of claim 29, wherein the housing pivots about an
axis perpendicular to the first plane.
37. The device of claim 36, wherein the housing pivots about an
axis perpendicular to the second plane.
38. The device of claim 29, wherein the housing pivots about an
axis perpendicular to a third plane that intersects the first plane
at a second angle.
39. The device of claim 29, wherein the housing pivots about an
axis perpendicular to the second plane.
40. A kit for a light generating device with a base, comprising: a
container defining a volume of space; a base positioned within the
volume of space, the base comprising an attachment structure; and a
light generating device positioned within the volume of space so as
to be unattached to the base, wherein the attachment structure can
be used for mounting the light generating device to an external
surface.
41. The kit of claim 40, wherein the base further comprises a
connection structure for mounting the light generating device to
the external surface.
42. The kit of claim 40, wherein the light generating device
generates a laser beam.
43. The kit of claim 42, wherein the light generating device
generates the laser beam with an asymmetric intensity.
44. The kit of claim 42, wherein the light generating device
generates light in the shape of a fan.
45. The kit of claim 44, wherein the light generating device
comprises a housing with at least one flat surface extending along
a first plane and the fan substantially lies within a second plane
that intersects the first plane at an angle.
46. The kit of claim 40, wherein the attachment structure comprises
an adhesive for attaching the device to the external surface.
47. The kit of claim 41, wherein the connection structure comprises
a pin for attaching the device to the external surface.
48. A kit for a leveling device with a base, comprising: a
container defining a volume of space; a base positioned within the
volume of space, the base comprising an attachment structure for
mounting the light generating device to an external surface; and a
leveling device positioned within the volume of space so as to be
unattached to the base.
49. The kit of claim 48, wherein the base further comprises a
connection structure for mounting the light generating device to
the external surface.
50. The kit of claim 48, wherein the attachment structure comprises
an adhesive for attaching the light generating device to the
external surface.
51. The kit of claim 48, wherein the connection structure comprises
a pin for attaching the light generating device to the external
surface.
52. The kit of claim 48, wherein the leveling device further
comprises an automatic leveler selected from the group consisting
of a pendulum, a cantilevered tilt mechanism, an electronic
leveler, and a shaft held between journals.
53. A method of aligning an object with a light beam, the method
comprising: positioning a light generator adjacent to a surface;
adhesively mounting the light generator to the surface; generating
light from the light generator along a direction of propagation so
that a line is formed along the surface; and placing an object so
that a portion of the object is aligned by the light.
54. The method of claim 53, wherein the line is interruptible in
that should an impediment be positioned on the line, the line will
be present on either side of the impediment, and wherein the
generating comprising actuating a switch from a first position to a
second position and causing light to be generated.
Description
CLAIM TO PRIORITY
[0001] This application claims priority under 35 U.S.C. .sctn.
119(e) to the filing date of U.S. Provisional Application
60/291,135, filed May 15, 2001; this application is also a
continuation-in-part of U.S. pat. appl. Ser. No. 10/141,392, filed
on May 7, 2002, pending; this application is a continuation of U.S.
pat. appl. Ser. No. 10/612,035, filed Jul. 1, 2003, which is a
continuation of U.S. pat. appl. Ser. No. 10/456,534, filed Jun. 18,
2003; all of which are hereby incorporated by reference in their
entirety.
BACKGROUND
[0002] The technical field of the application is that of alignment
devices, and in particular an alignment device and an attachment
that allows the alignment device to be releasably attached from a
surface on which alignment is desired.
[0003] Alignment of surfaces is a perennial problem in a variety of
fields, ranging from construction to interior decorating. Alignment
is necessary for walls that should be perpendicular to a floor, or
otherwise plumb. Masonry and brick-laying practitioners are well
aware of the importance of plumbed and aligned surfaces and chalk
lines. A home interior decorated with pictures and other wall
ornamentation makes a much better appearance when the ornamentation
is aligned, especially with respect to vertical or horizontal
alignment. Many mechanical and electrical alignment devices are
available, and some laser devices are available. Some of these
products are cumbersome, others are not suitable for certain uses.
Chalk lines, for instance, are sometimes undesirable for use in
finished, interior areas.
[0004] One aspect of alignment-product performance, and in
particular of laser-alignment products, that could be improved is
the width, brightness and straightness of the laser light. A
visible, straight laser line is acceptable, but may be limited in
its brightness over a distance, and may also tend to defocus and
become dimmer as a user works away from the source of the laser.
Rotating lasers are used to project lines on walls perpendicular to
the direction of propagation of the laser. Thus, such devices may
have limited utility or may not work in confined spaces requiring a
longer alignment tool.
[0005] Moreover, a conventional laser is not well-equipped for
projecting a flat or planar beam of light. The essence of laser
light is that it is coherent or substantially monochromatic, that
is, of a single wavelength or a narrow wavelength band. Thus, when
a beam of laser light is refracted through a prism, the prism
output is not a spreading of the beam as with ordinary "white"
light, but rather a coherent, focused beam, very similar to the
input. The laser beam is thin and is usefully only visible when
projected onto a surface.
[0006] Another aspect that could be improved is the inability of
laser devices to work around obstructions. That is, if a
wall-hanging, such as a picture frame, interrupts the laser beam,
it may be blocked from further projection. Therefore, it is
necessary to mark locations or heights, one by one, rather than
working with the actual objects, in order to align them.
Obstructions may include moldings placed in a doorway, picture
frames in the way of those being aligned on one horizontal line,
the operator of the device, other obstacles, or even textured or
stuccoed surfaces on interior walls.
[0007] There are devices that direct a laser beam parallel to but
away from a surface requiring alignment. A marker device or
detector component is then used to sight the beam and mark
corresponding locations on the wall adjacent the beam. Use of such
a device requires multiple components and at least two people, one
to align the laser and another to mark the wall. Moreover, the wall
itself requires marking with this method.
[0008] A conventional laser beam projector is thus not able to
project a laser line on the wall on which it is mounted, nor can it
go around obstructions. A laser alignment beam mounting on the wall
where alignment is needed would allow a person seeking alignment,
whether a carpenter, a painter, or an interior decorator, to
accomplish his or her task in a quicker and easier fashion. The
ability to work around obstacles would save much time and effort.
Such laser alignment devices must be aligned themselves, and are
typically equipped with a tripod and a sophisticated leveling
device so that they read true for horizontal and vertical plumbs.
While leveling is necessary, such sophistication as a tripod adds
to the expense and bulkiness of the leveling device. What is
desired is a convenient, easy-to-level laser device useful for
aligning objects. It would be even more desirable if the alignment
device could be easily mounted on a vertical or horizontal surface,
and oriented in the desired direction. Better alignment devices are
thus required to overcome these deficiencies in the prior art.
BRIEF SUMMARY
[0009] One aspect of the invention is a line generating device. The
device includes a housing including a support structure that
substantially extends along a first plane, a light source mounted
within the housing, a lens that receives light and projects the
light in the shape of a fan, wherein the fan substantially lies
within a second plane that intersects the first plane at an angle.
The device also includes a reference level on an outside of the
housing, and an adhesive for mounting to the support structure for
mounting the device to a surface.
[0010] Another aspect of the invention is a line generating device.
The line generating device includes a housing, a support structure
attached to the housing, the support structure comprising an
external adhesive for supporting the device on a surface, a light
source mounted within the housing, a lens receiving light from the
light source, and an aperture on an outside of the housing for
emitting light.
[0011] Another aspect of the invention is a light generating
device. The device includes a housing including a support structure
that substantially extends along a first plane, a laser light
source mounted within the housing, a lens that receives light and
projects the light substantially within a second plane that
intersects the first plane at an angle, a reference level on an
exterior of the housing, and an adhesive attached to the support
structure for mounting the device to a surface, wherein the support
structure includes an inner portion and an outer portion that
rotate and swivel with respect to one another.
[0012] Another aspect of the invention is a method of aligning an
object with a light beam. The method includes positioning a light
generator adjacent to a surface, adhesively mounting the light
generator to the surface, generating light from the light generator
along a direction of propagation so that a line is formed along the
surface, and placing an object so that a portion of the object is
aligned by the light. The line is interruptible in that should an
impediment be positioned on the line, the line will be present on
either side of the impediment, wherein the step of generating
includes actuating a switch from a first position to a second
position and causing light to be generated, and placing an object
that so a portion of the object is aligned by the light.
[0013] Another aspect of the invention is a kit for a light
generating device with a base. The kit includes a container
defining a volume of space, a base positioned within the volume of
space. The base includes an attachment structure. The kit also
includes a light generating device positioned within the volume of
space so as to be unattached to the base, wherein the attachment
structure can be used to mount the light generating device to an
external surface.
[0014] Another aspect of the invention includes a kit for a
leveling device with a base. The kit includes a container defining
a volume of space, and a base positioned within the volume of
space. The base includes an attachment structure for mounting the
light generating device to an external surface. The kit also
includes a leveling device positioned within the volume of space so
as to be unattached to the base.
[0015] Each of the above aspects of the present invention provides
an improved structure and/or method for mounting or positioning
either a leveling device or a light generating device on a surface.
The following drawings form part of the present specification and
are included to further demonstrate certain aspects of the present
invention. The invention may be better understood by reference to
one or more of these drawings in combination with the detailed
description of specific embodiments presented herein.
BRIEF DESCRIPTION OF THE DRAWINGS
[0016] FIG. 1 is an isometric view of an outside of an embodiment
of a laser line generator according to the present invention.
[0017] FIG. 2 is an alternate view of the generator of FIG. 1.
[0018] FIG. 3 is a cutaway isometric view showing the inside of the
generator of FIG. 1.
[0019] FIG. 4 is a view depicting the bottom of the generator of
FIG. 1.
[0020] FIG. 5 is another view depicting the bottom of the generator
of FIG. 1.
[0021] FIG. 6 depicts an embodiment of optics to be used with the
laser light generator of FIG. 1.
[0022] FIG. 7 depicts a side view of the workings of a second
embodiment of laser light generator optics to be used with the
laser line generator of FIG. 1.
[0023] FIG. 8 depicts a top view of the workings of the laser light
generator optics of FIG. 7.
[0024] FIGS. 9A, 9B, and 9C depict a laser line generating device
projecting the laser light in a narrow beam or fan and aligning
objects on a wall.
[0025] FIG. 10 depicts an exploded view of a swivel base for the
laser line generating device.
[0026] FIGS. 11a and 11b depict top and bottom views of the top
portion of the embodiment of FIG. 10.
[0027] FIGS. 12a and 12b depict top and bottom views of the bottom
portion of the embodiment of FIG. 10.
[0028] FIG. 13 depicts an assembled laser line generator with
swivel base.
[0029] FIGS. 14A, 14B, and 15 depict other techniques used to
assemble a light generator to a swivel base.
DETAILED DESCRIPTION OF THE DRAWINGS AND THE PRESENTLY PREFERRED
EMBODIMENTS
[0030] The present invention is better understood by reference to
the figures and description below. FIG. 1 presents a view of a
leveling device, such as laser alignment device and generator 10.
The generator comes in a housing 12, which may be made of plastic
or other suitable material such as metal. It possesses a handgrip
area 14 for handling, the area preferably made of an elastomeric
substance for easier gripping. The generator has a first leveling
indicator 16, a spirit level or "bubble" for orientation leveling
device is selected from the group consisting of a pendulum, a
cantilevered tilt mechanism, an electronic leveler, and a shaft
held between journals or leveling in one plane, such as horizontal
or vertical. It also has a second leveling indicator 18, for
orientation or leveling in a second plane perpendicular to the
first plane. The housing also contains a protective door 20 with a
linked switch for turning on the laser light source when opening
the door for access to the laser beam. The generator also may have
one or more sliding pin actuators 22 suitable for use by a finger
or a thumb and mechanically connected for extending or retracting
one or more pins 26 from the generator bottom 28. Without a swivel
base attached to bottom 28, each pin desirably penetrates into a
surface, such as a drywall or lumber surface, to suspend and hold
the laser generator on the surface while it is in use. FIG. 1
depicts the door 20 in an open position and a projection lens 24.
The door or aperture 20 provides an exit for the light generated
within the housing, and in the open position, does not
substantially block the exit of light from the housing.
[0031] As shown in FIG. 1, a preferred projection lens 24 includes
a rounded corner 25 on its front face 27. The effect of the lens is
to shape the laser light passing through it into a planar,
fan-shaped "comet beam" or fan shape. The intensity of the light
and the shape of the beam may be asymmetric, in which one side of
the "comet" may be larger and brighter than the other side. The fan
shaped beam is then routed so that the less bright side of the
fan-shaped beam is nearest the wall of interest, and the brighter
side is away from the wall. In this orientation, the fan-shaped
beam of light will propagate a long distance from its origin, and
the laser light will be usable a long distance away from the laser
line generating device.
[0032] The laser light generated by the laser line generator
preferably exits from the top, curved corner of the lens. The
radius of the corner is desirably from about 0.030 inches (0.75 mm)
to about 0.060 (1.50 mm) inches, and preferably about 0.047 inches
(1.2 mm). The height of the rounded corner of the lens is desirably
one or two inches above the bottom surface of the laser line
generating device. When the beam or fan of light exits the lens, it
forms a thin plane in the length-wise direction of the device, and
the beam forms a plane from the top, curved corner of the lens
downward, to the wall or other surface on which alignment is
sought. Because the light is now a plane, rather than a pinpoint,
it is able to project over and beyond obstacles, allowing a user to
align several objects without having to move them.
[0033] In the embodiments shown, the laser light projects generally
in the direction of the alignment surface, a generally flat, planar
bottom support surface. The direction of propagation is the
direction the light travels, generally parallel to the wall or
surface on which the laser line generating device is mounted. The
fan-shaped aspect of the beam is perpendicular to the wall, and is
preferably no higher than the height of the lens 24 above the wall.
The laser light generating device and its lens are mounted on the
wall via pins 26 or with the swivel base, which is discussed below.
The fanshape of the beam extends from a height of the lens above
the wall to the wall surface itself, in a very thin plane, about
{fraction (1/32)} of an inch thick. The plane of the fan-shaped
beam is also perpendicular to the flat bottom surface of the laser
line generating device.
[0034] FIG. 2 depicts the same device with the door 20 closed, and
with a linked internal switch (not shown) open, and the laser thus
off. The figure depicts the generator 10, housing 12, gripping
surface 14 and levels 16, 18 with pin actuator 22 raised so that
the pin remains inside the housing and the laser generator is not
suspended on a wall or other surface. The door or aperture 20 may
also be a switch for the power supply of the laser line generating
device. In the position shown in FIG. 2, with the door closed, the
switch is preferably in a closed position and there is no power
supplied from the power supply to the light source. In this
position, the door acts as a lens cover and substantially blocks
the exit of the beam from the device.
[0035] FIG. 3 depicts a cutaway view of the interior of the laser
generator, showing a supporting structure 34, 40, for levels 16,
18, and also showing an area for a power source or battery 32, a
laser diode 42, a lens 24, and a circuit board 36. FIG. 4 more
clearly depicts a view from the bottom or flat face 30 of the
generator 10. The bottom surface desirably has a door 52 for access
to a battery or power source for the generator. Also shown are
holes 54 for the retractable pins 26 used to secure the generator
to a wall or a surface. A notch 56 may also be useful for aligning
or orienting the generator on a surface. FIG. 5 depicts the bottom
of the laser generator with the pins retracted, with a better view
of holes 54.
[0036] While one or more pins may be used to hold the generator
onto a wall, other devices may be used as retainers. These devices
include, but are not limited to, a string or a wire, a fastener,
tape, putty-type substances or other adhesives. While the laser
line generator may be most convenient to use when pinned to a wall,
it may also be mounted on a table, floor, or other flat surface,
and used to project a line without being mounted on a wall.
[0037] A method of practicing the invention includes providing a
surface, such as a wall wherein orientation with a line is desired,
and also providing the laser generator. In the case where pins 26
are not used, a user mounts the laser generator 10 via its flat
surface and a swivel base (see FIGS. 10-12) onto the wall and
orients the laser generator in one or more planes. A reference
level, such as bubble level 18, is then used to orient and true the
laser generator 10 in one plane, for instance, the vertical plane,
using the swiveling swivel base described below. The second bubble
level 16 may be used if the user wishes to orient the laser
generator 10 in a horizontal plane. When the user is satisfied with
the orientation, the user turns on the generator 10, projecting a
laser beam from the vertical or horizontal plane of the device. In
one embodiment, the generator is turned on by opening the lens door
or aperture.
[0038] A desirable feature of the invention is that the output of
the generator is not merely a linear beam of light, but rather a
fan-shaped beam. The fan-shaped beam propagates along the surface
of the wall in the direction of propagation. Because the plane of
the beam runs perpendicular to the wall along the length of the
beam, the line of intersection between the beam and the wall forms
a visible line of alignment. With a fan-shaped beam, the laser
light is able to project over and beyond obstacles, such as
moldings placed in a doorway, picture frames in the way of those
being aligned on one horizontal line, or other obstacles, such as a
wavy or stuccoed surface on an interior wall. With a conventional
laser generator, these obstacles must be removed or the laser
itself must be repositioned to avoid each obstacle. Of course,
moving and relocating the laser alignment tool destroys the
continuity of the line of alignment. Moreover, a conventional laser
is not well-equipped for shaping the laser beam into a fan. The
essence of laser light is that it is coherent, that is, of a single
wavelength or a narrow wavelength band. Thus, when laser light is
refracted through a prism, the prism output is not a spreading of
the beam as with ordinary "white" light, but rather a coherent,
focused beam, very similar to the input. The present invention
overcomes this obstacle by sending a sharp, focused pinpoint of
light through a specifically constructed lens to create a flat
planar, fan-shaped beam of light.
[0039] It is also noteworthy that the axis of alignment, such as
the alignment of pictures on a wall, is substantially parallel to
the direction of propagation of the laser light. By contrast, a
conventional and less useful method is to project a laser light
perpendicular to a wall or other surface in which alignment is
desired, and perpendicular to the direction of propagation. With
the instant laser line marking device, a user projects a fan-shaped
beam in a propagation direction that is substantially parallel,
rather than perpendicular, to the surface on which alignment is
desired, the fan-shaped dimension of the beam being perpendicular
to the wall.
[0040] As seen in FIG. 9a, the laser line generating device
propagates light in the length-wise direction of the laser line
generating device 10. The direction of propagation, shown by arrow
84, is substantially parallel to the wall, with the fan-shaped
aspect of the beam being perpendicular to the wall. In one example,
if a narrow fan projects from a line marking device according to
the present invention, the beam is "substantially parallel" if it
is substantially parallel for at least several lengths of the line
marking device in the direction of propagation of the laser. It is
substantially parallel because even a "narrow" fan spreads rapidly
and the beam is no longer strictly parallel. The device and the
beam are easily distinguished, however, from a beam that has a
direction of propagation perpendicular to the wall, such as shown
in U.S. Pat. No. 5,208,438.
[0041] The laser light exits the lens or prism in an elongated fan
in a direction of propagation. The direction of propagation, as
discussed above, is substantially parallel to the surface on which
alignment is desired. The width of the fan, however, is
perpendicular to the surface, and the intersection of the beam with
the surface generates the visible line of alignment that the user
seeks. It is this width that allows the fan to project over and
beyond obstacles. That is, even though an obstacle may partially
obscure the fan-shaped beam of light, at least part of the
fan-shaped beam extends above and beyond the obstacle, and a user
may continue to align objects on which alignment is desired.
[0042] FIG. 6 depicts an embodiment of the invention, in which a
laser diode 60 emits coherent laser light, such as, coherent laser
light at 635 nm wavelength. The light is collimated into an ovate
shape by collimation optics 62, for instance at least one
collimating lens, by techniques well known to those skilled in
optic arts. The ovate beam then enters a projection lens 64 from
the right side in FIG. 6, desirably at an angle in which total
internal reflection will occur, that is, all the incident light
will be reflected rather than refracted from the back face of the
lens. It has been found that this phenomenon is reinforced further
if the back surface 66 of the lens is mirrored. The phenomenon is
also reinforced if a corner of the lens or prism is radiused as
mentioned above. When the light emerges from the radiused corner 65
of the projection lens 64 in FIG. 6, it is in the shape of a narrow
beam or fan, rather than a single point or beam of light, and is
able to extend around and beyond obstacles for the convenience of a
user. In one embodiment of the invention, the angle A between the
mirror surface of the collimating lens and the incident light from
the laser diode source is from about 60 to about 65 degrees,
preferably about 63 degrees, for maximum reflection of light
through the lens, rather than refraction at angles that detract
from the performance of the generator. In this depiction, the light
68 is planar within the plane of the paper, when it leaves the
lens. In one embodiment of the invention, the laser diode, the
collimation lens, and the projection lens are contained within a
single element, such as a laser diode with included collimating
optics.
[0043] In one embodiment shown in FIG. 6, an aspherical projection
lens 64 is made from optic grade glass, in the form of an
equilateral triangle with the back face mirrored. Desirably, the
lens is about 0.45 inches on a side, with one corner 65 radiused to
about 0.030 to about 0.060 inches and the other corners rounded to
a radius of 0.005 to 0.015 inches. With this geometry, the lens or
prism is able to focus an ovate beam into a planar fan-shaped beam
useful for aligning objects.
[0044] FIG. 7 depicts a side view of another embodiment of the
invention, in which a laser light source 70, such as a laser diode,
emits laser light, which is collimated into an ovate shape by
collimating optics 72 and then sent to an aspherical projection
lens 74 with one corner 75 radiused as mentioned above for
projection of a narrow fan of light 76. In one embodiment, the axes
of the ovate-shaped beam sent to the lens are about {fraction
(3/16)} inches by about {fraction (1/16)} inch. The planar,
fan-shaped beam 76 emerging from projection lens 74 is than about
{fraction (1/32)} inch thick. Note that the top corner 75 on the
face of the lens in FIG. 7 is radiused from about 0.030 to about
0.060 inches, and preferably about 0.047 inches. FIG. 8 depicts the
same embodiment in a top view, in which the rounding may not be
observable. The source of laser light 70 generates visible laser
light and the collimating optics 72 shape the light into a narrow
beam. From the top view, the beam of light is very thin and is
about the width of the projection lens 74, 0.4 inches wide. From
the side view, the projected light is a thin beam; from the top
view, the projected light is a thin fan.
[0045] One embodiment of the invention features a lens, such as the
lenses depicted in FIGS. 7 and 8, that is about 0.4 inches (10 mm)
square, and about 0.1 inches thick (2.5 mm) in the direction of
propagation, that is able to focus the incoming laser light beam
and reflect it into a planar fan shape. The lenses are aspherical,
cylindrical lenses. The lens may be made from one of several
optical-grade clear, highly transparent materials, including BK7
glass having an index of refraction of about 1.5168 and a Vd of
64.17. In another embodiment, acrylic resin having an index of
refraction of 1.4917 and a Vd of about 55.31 is useful. It has been
found that the lens works better if the exit face has only one
corner radiused about 0.047 inches, with the other faces being
radiused for normal manufacturing custom, to about 0.005 to about
0.015 inches. More details on the performance of these lenses are
discussed in copending application U.S. pat. appl. Ser. No.
10/141,392, entitled Laser Line Generating Device, assigned to the
assignee of the present application and which is hereby
incorporated by reference in its entirety.
[0046] FIG. 9A demonstrates the use of an embodiment of a laser
generator 10 according to the present invention, in which a
fan-shaped beam 76 is able to align a first picture frame 78 on
wall 77. The generator is convenient to use because it projects a
laser beam on the wall adjacent the generator. The beam is able to
overcome obstacles such as door moldings 80 with its fan shape and
extend above the molding with sufficient clarity to align another
object, such as picture frame 82. It is able to overcome these
obstacles because the corner from which the light exits is one or
two inches removed or offset from the wall, allowing a fan or beam
of light to form. The direction of propagation 84 generally is in
the direction from the generator to the objects on which alignment
is desired, such as picture frames. At the same time, the width of
the fan is perpendicular to the wall 77 on which the paintings are
hung or on which, more generally, alignment is desired. The
fan-shaped beam 76 intersects the wall 77 and the light is visible
on the wall at the intersection 79 of the fan-shaped beam 76 with
the wall 77. In one embodiment, the housing of the laser line
generator is a support face that substantially extends along a
first planar surface, such as wall 77, and the fan shaped beam 76
substantially lies within a second planar surface, such as the
plane of light 76. The second planar surface may intersect the
first planar surface at an angle. The angle may preferably be
90.degree., or a right angle between the fan-shaped beam and the
surface on which objects are to be aligned.
[0047] The "comet" effect means that the intensity of the planar
fan is less nearer the wall and greater away from the wall, so that
the beam is able to usefully travel further, and enable a user to
align objects at greater distances. Thus, in FIGS. 9B and 9C, the
intensity of the laser light will be greater at outer edge 87 than
at the inner edge 85 where the fan-shaped beam intersects the wall
77 while the beam is used to align object 82, such as a picture
frame. There is no practical limitation to the distance the
fan-shaped beam can travel. Laser diodes of 5-15 mW can be
successfully used to project beams 30-50 feet long along painted
wall-board surfaces.
[0048] The laser line generator 10 described previously with
respect to FIGS. 1-9C can be utilized with an adhesive base or
attachment, an embodiment of which is depicted in FIGS. 10-13. FIG.
10 shows an exploded view of the attachment 100. Attachment 100
includes an inner or top portion 102, an outer or bottom portion
104 and a joining portion 105. The joining portion may include a
large plastic retainer 106, a bolt 107, washer 108, and a nut 125.
Top and bottom portions 102, 104 may be molded from any convenient
plastic, and nut 125 may be molded into bottom portion 104. The
attachment is assembled with a fastener, such as bolt 107 threaded
into nut 125. Retainer 106 fits into a recess 112 on the top
surface of top portion 102. Retainer 106 may be flat on its top and
convex on its bottom surface 106a to match the contours of the
concave recess 112. Adhesive strips 109 are mountable to the bottom
surface 126 of bottom portion 104, and portions thereof or release
tabs 127 for strips 109 may protrude from the side of the
attachment. Additional washers, such as lock washers, may also be
used with the fastener and retainer. Top portion 102 also mounts a
latch 116 for retaining the laser line generator on the swivel
base. The top portion may also mount one or more level indicators,
such as the bubble levels described above, for one or more axes of
the top portion, such as on the long and short sides of top portion
102. With these levels, a user may place the base on a wall and use
the bubble levels to orient first the swivel base and then the
laser line generator to a true plumb alignment.
[0049] In addition to manual level indicators, as described above,
the swivel base may also include other automatic levelers. These
devices may include automatic pendulum-type levelers, in which an
internal or external pendulum, along with gravity, orients and
levels the swivel base, and thus the laser line generator. Other
automatic levelers could include electronic levelers, a shaft held
between journals, cantilevered tilt mechanisms, and so forth.
Details on some of these levelers are disclosed in U.S. Pat. Nos.
4,031,629, 4,751,782, 5,075,977, and 5,992,029, among others.
[0050] FIGS. 11a and 11b are more detailed views of the top and
bottom of top portion 102 of the attachment. Top portion 102
includes a flat surface 111, a recess 112, and an orifice 113. Flat
surface 111 may be adapted so that the bottom surface of the laser
line generator 10 of FIGS. 1-9C, contacts flush with the flat
surface between sidewalls 115, which, along with latch 116, retain
the laser line generator securely in the swivel base. In the
preferred embodiment, the surface is slightly recessed. The end of
top portion 102 opposite latch 116 has another recess 118, for
receiving a portion of laser line generator bottom 28.
[0051] Recess 112 is curved to match the bottom, interface surface
114 of top portion 102. Interface surface 114 allows top portion
102 to swivel or rotate relative to bottom portion 104 for a full
360.degree. swiveling and orienting capability. The underside
interface surface 114, which includes a convex shape, may be solid
or may be ribbed as shown for lighter weight and ease of use of
both the swivel base and the mounted laser line generating
device.
[0052] A user inserts the bottom 30 of laser line generating device
10 of FIGS. 1-9C into recess 118 on flat surface 111, while urging
latch 116 forward, in the direction of arrow A. After the bottom 30
of the laser line generating device 10 is inserted and is resting
on flat surface 111, latch 116 is released. Latch 116 then moves in
the direction of arrow B, and helps to retain the laser line
generator in position on top portion 102. Latch 116 may be a
snap-fit design that can snap into place without the need to urge
the latch forward, with a bottom surface 116a flat to match bottom
30 of laser line generator 10. Top portion 102 may also have a
notch 117 to assist in marking purposes. When removing the device
10 from top portion 102, latch 116 may be urged forward to release
the device from top portion 102.
[0053] In another alternative embodiment of the connection
structure, the connection structure of FIGS. 10-13 is interchanged
so that the bottom surface of the laser line generator 10 includes
side walls and recesses similar to side walls 115 and recesses 118
of FIGS. 10-13. The bottom surface of the laser line generator also
includes a latch similar to latch 116. The base and laser line
generator are attached to one another by inserting the top portion
of the attachment into the recessed area of the bottom surface of
the generator and then applying the latch in a manner described
previously for embodiments of FIGS. 10-13.
[0054] FIGS. 12A and 12B provide top and bottom views of bottom
portion 104 of adhesive base attachment 100. Bottom portion 104 has
a top surface 122 and an interface surface 124 that is curved to
match the bottom interface surface 114 of top portion 102. Top
interface surface 124 is concave to match convex bottom interface
surface 114. This surface may also be ribbed as shown for lighter
weight, or may be made from solid material. The remainder of top
surface 122 may be solid or may be ribbed, including rib 123
aligned for nut 125 which is molded into bottom portion 104. Bottom
surface 126 of bottom portion 104 is preferably flat for mounting
adhesive strips 109, including adhesive 128, release liners 129 and
release tabs 127. Flat bottom surface 126 and adhesive strips 109
form an adhesive interface surface for the laser line generator
with swivel base.
[0055] Adhesive 128 is preferably a removable pressure-sensitive
adhesive for mounting the attachment 100 to a wall. The special
adhesive used allows for easy removal from a wall on one side and
for easy removal from surface 126 on the other side of the
adhesive. Pressure-sensitive adhesives, such as adhesive 128, are
self-adhering with a slight amount of pressure, rather than
adhesives requiring heat or water activation. Pressure-sensitive
adhesives may be made from rubber-based or acrylic stocks, and may
be manufactured in several ways. For instance, a central carrier or
foam core may have pressure-sensitive adhesive applied by a hot
melt process, a solvent-evaporation process, or an emulsion
process. A release liner may be applied to one or both sides of the
adhesive. Strong double-sided tape may be used as well.
[0056] In the preferred embodiment, a first release liner (not
shown) is removed from one side of the adhesive so that the
adhesive may be secured to bottom surface 126. Release liner 129 on
the other side is then removed and the swivel base and laser line
generator are then adhered to a surface on which objects are to be
aligned, such as wall 77 of FIGS. 9A-9B. If removable
pressure-sensitive adhesives are used, the swivel base may be
removed without damaging the surface on which the objects were
aligned. While many such adhesives may be used, "Command Strips,"
from the 3M Company, Minneapolis, Minn., are preferred. These
adhesives are actually two adhesives interlocked in the center.
These adhesives may be purchased, separable and aligned, for single
use in adhering the swivel base, and the laser line generating
device, to a wall or other surface. A pack of six strips may be
adhered to the bottom surface of the swivel base in a group as
shown, for example, in FIG. 12B. A single release liner 129 from
one of the strips is then removed and the swivel base 100 is
removably affixed to a wall on which alignment of objects is
desired. When the alignment operation is completed, the outer
release tab 127 is then pulled to release the adhesive strip from
the wall and the used adhesive is discarded.
[0057] In use, the laser line generator 10 and the base 100 can be
packaged as separate from one another within a volume of space
defined by a container, wherein the container, generator and base
define a kit. In one embodiment, the swivel base may also contain
level indicators, such as spirit or bubble levels. Once the
generator and base are removed from the container, the laser line
generator 10 is assembled or placed onto top portion 102 of the
swivel base 101, with at least one adhesive strip 109 in place on
bottom portion 104, as depicted in FIG. 13. Swivel base 101 is
virtually identical to previously-described swivel base 100, but
swivel base 101 also includes spirit levels 103 oriented on two
planes of top surface 102 of swivel base 101. Using the ability of
the base to swivel and rotate, the user tilts the laser line
generator in the desired direction and then uses the bubble levels
16, 18 to level laser line generator 10. The combination of laser
line generator 10 and swivel base 100 is used in the same manner as
that described with reference to FIGS. 9A-9C, with fan-shaped beam
76 propagating in the direction from the laser line generator 10 to
objects 78, 82 to be aligned, the width of fan-shaped beam 76 being
perpendicular to wall 77. When the user has completed the alignment
task, the user pulls on the release tab 127, releasing the adhesive
from wall 77 or other surface. The adhesive strip that was used may
then be removed from bottom surface 126 of bottom portion 104 and
discarded. The user may then go on to other alignment tasks as
desired.
[0058] In other embodiments of the connection structure, either the
base 30 of the generator 10 or the top portion 102 may be provided
with a magnet that mates magnetically with either another magnet
material or ferrous material on the opposing surface. This can
retain the laser generator 10 to the swivel base without the use of
a latching structure. Hook and loop fasteners, such as Velcro.RTM.,
may also be used to attach the laser generator to the swivel base.
Magnetic attraction may also be used with a magnet on one of the
top portion or generator, and a metal plate, such as steel or iron,
on the other. Other ways may also be used, such as a tab-and-slot
arrangement, with a slot or groove on the bottom portion and a
matching tab or other feature on the top portion. All these are
ways to join the top portion of the swivel base to the light
generator.
[0059] Some of these other ways are depicted in FIGS. 14A, 14B, and
15. For instance, in FIG. 14A, the swivel base top 102 may mount a
ferrous plate 141 on its front face, while the light generator
bottom 30 mounts a magnet 142 on its bottom 30 near battery door 52
to attract and hold the ferrous plate and the stud finder. Ferrous
plate 141 may lie atop the recess 112 and orifice 113 which may
still be utilized to mount top 102 of the swivel base to the bottom
portion of the swivel base (see FIG. 10). In another method, shown
in FIG. 14B, the swivel base bottom 102 mounts a hook portion 143
of a hook-and-loop fastener, such as Velcro.RTM., while the light
generator bottom 30 mounts the loop portion 144 as part of the
battery door, to hold light generator 10 to top portion 102 of the
swivel base. As is well known, hook and loop fasteners are
typically adhered to devices by an adhesive that very firmly bonds
the fastener to the device. This adhesive attachment is an inherent
part of the hook and loop fasteners herein described. FIG. 15
depicts another way to mount the light generator 150 onto the
swivel base top 151, by providing a tab 152 on the bottom surface
of light generator 150, and by providing a matching slot 153 in the
top surface 151 of the swivel base, so the light generator may be
slid into the swivel base. A catch or retainer may also be used to
insure retention of the light generator when the assembly is held
vertically.
[0060] While this invention has been shown and described in
connection with the preferred embodiments, it is apparent that
certain changes and modifications, in addition to those mentioned
above, may be made from the basic features of this invention. While
the laser line generator may be most convenient to use when mounted
to a wall, it may also be mounted on a table, floor, or other flat
surface, and used to project a line without being mounted on a
wall. While the swivel base may be used with the described laser
line generator, the swivel base may also be used with other
leveling devices, laser generators, or with other non-laser light
or line generators. Many other variations of the invention may also
be used without departing from the principles outlined above.
Accordingly, it is the intention of the applicant to protect all
variations and modifications within the valid scope of the present
invention. It is intended that the invention be defined by the
following claims, including all equivalents.
* * * * *