U.S. patent number 3,700,885 [Application Number 05/077,259] was granted by the patent office on 1972-10-24 for architectural light and adjustment means therefor.
This patent grant is currently assigned to Air King Corporation. Invention is credited to Mitchell Bobrick.
United States Patent |
3,700,885 |
Bobrick |
October 24, 1972 |
ARCHITECTURAL LIGHT AND ADJUSTMENT MEANS THEREFOR
Abstract
A recessed lighting fixture is provided with a frame adapted for
adjustable mounting longitudinally on hanger bars, and a
light-carrying can which can be adjusted axially with respect to
the frame without using tools. Spring-biased gripping members are
provided for both adjusting the position of the frame on the hanger
bars and for permitting transverse adjustment of the can relative
to the frame.
Inventors: |
Bobrick; Mitchell (Culver City,
CA) |
Assignee: |
Air King Corporation
(N/A)
|
Family
ID: |
22137031 |
Appl.
No.: |
05/077,259 |
Filed: |
October 1, 1970 |
Current U.S.
Class: |
362/366;
248/343 |
Current CPC
Class: |
F21S
8/02 (20130101); F21V 21/04 (20130101); F21V
21/22 (20130101); F21V 17/18 (20130101) |
Current International
Class: |
F21S
8/02 (20060101); F21V 21/04 (20060101); F21V
21/14 (20060101); F21V 21/02 (20060101); F21V
17/18 (20060101); F21V 17/00 (20060101); F21s
013/06 () |
Field of
Search: |
;240/73BC,73R,78H,78HA,67,41.5 ;248/221,214,342,343 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Matthews; Samuel S.
Assistant Examiner: Matthews; Alan A.
Claims
What is claimed is:
1. In a lighting fixture of the type which is to be supported from
spaced hanger bars, the improvement comprising, in combination: a
mounting frame defining an open center portion and having
diametrically located support means thereon adapted for securement
to said hanger bars to support the mounting frame therefrom, a
circularly cylindrical housing of smaller cross-sectional area than
the area of the open center portion defined by the mounting frame,
the housing having means for carrying a light bulb therein,
connecting means for supporting the housing on the mounting frame
at selected positions relative to the mounting frame, said
connecting means including a plurality of circumferentially spaced
resilient members mounted on said frame that provide a plurality of
inwardly directed protuberances; the housing having locating means
comprising a plurality of annular recesses axially spaced along its
outer surface for cooperating with said connecting means to permit
manual selective axial positioning and rotative adjustment of the
housing with respect to the mounting frame by releasable
cooperative engagement of the plurality of protuberances with an
annular recess.
2. A construction as in claim 1 further including means within said
annular recesses for engaging said protuberances to restrain the
housing from rotating relative to the connecting means.
3. In a lighting fixture of the type which is to be supported from
spaced hanger bars, the improvement comprising, in combination: a
mounting frame defining an open center portion and having
diametrically located support means thereon adapted for securement
to said hanger bars to support the mounting frame therefrom, a
housing of smaller cross-sectional area than the area of the open
center portion defined by the mounting frame, the housing having
means for carrying a light bulb therein, connecting means for
supporting the housing on the mounting frame; the housing having
means axially spaced along its outer surface for cooperating with
said connecting means to enable selective axial positioning of the
housing with respect to the mounting frame; the support means
comprising spring members each with a hanger bar-receiving aperture
therethrough and biased to normally grip a hanger bar, but
affording selective movement of the spring members against said
bias to a position permitting relative sliding movement between the
spring members and the hanger bars.
4. A construction as in claim 3 wherein each of said support means
comprises a generally V-shaped metal spring member with each side
of the V defining a slot therein for receiving a hanger bar adapted
to extend through both slots of said support means, whereby manual
movement of the sides of the V toward each other against the normal
bias of the spring member will align the slots for unobstructed
sliding entry therethrough of a hanger bar, and release of the
sides of the V when the hanger bar is in the slots will enable the
walls defining the slots to frictionally engage the hanger bar to
provide a restraining force against relative sliding movement
between the generally V-shaped spring member and the hanger
bar.
5. A construction as in claim 3 wherein said housing is circularly
cylindrical and said mounting frame is annular, said mounting frame
having an inside diameter that is greater than the outside diameter
of the cylindrical housing whereby said housing can move axially
through said mounting frame.
6. A construction as in claim 3 wherein said connecting means and
said support means comprise metal spring members, and vertical
posts carried by the mounting frame for securing the metal spring
members to the mounting frame.
7. A construction as in claim 4 wherein the slots are generally
L-shaped to receive substantially flat bars with their surfaces
lying in either a horizontal plane or a vertical plane or to
receive bars having an L-shaped cross-sectional configuration.
8. A construction as in claim 5 further including cylindrical skirt
means for enclosing the portion of the housing extending below the
mounting frame, and means for supporting said skirt means from the
housing.
9. In a lighting fixture of the type which is to be supported from
spaced hanger bars, the improvement comprising, in combination, a
mounting frame defining an open center portion and having
diametrically located support means thereon adapted for securement
to hanger bars to support the mounting frame therefrom, a housing
for carrying a light bulb, means for connecting said mounting frame
to the housing, each of said support means including at least one
spring member with a hanger bar-receiving aperture therethrough and
biased to frictionally grip the hanger bar extending therethrough,
but affording selective movement of said spring member against said
bias to a position that permits relative sliding movement between
the spring member and the hanger bar, each of the support means
including a generally V-shaped metal spring member with each side
of the V defining a slot therein for receiving a hanger bar adapted
to extend through the two slots of the two sides of the hanger
bar-carrying means, whereby manual flexing of the sides of the V
toward each other against the normal bias of the spring member will
align the slots to permit sliding movement of the spring member
relative to the hanger bar and release of the sides of the V with
the hanger bar in the slots will enable the sides of the spring
member to grip the hanger bar to prevent such sliding movement.
10. A construction as described in claim 9, wherein the slots are
generally L-shaped to receive substantially flat bars with their
surfaces lying in either a horizontal plane or a vertical plane or
to receive bars having an L-shaped cross-sectional configuration.
Description
BACKGROUND OF THE INVENTION
Recessed lighting fixtures are generally connected by an
electrician to ceiling supports that must be located relatively
precisely in relation to the aperture in the ceiling with which the
fixture is to communicate. After the fixture is connected a trim
ring is set in place to provide a neat-appearing joint at the lower
end of the fixture.
It is an object of the present invention to provide a recessed type
lighting fixture which has multiple degrees of adjustability
relative to apertures in the ceiling.
Another object of the present invention is to provide a
recessed-type lighting fixture including metal spring members for
releasably gripping hanger bars used to support the fixture, so as
to permit longitudinal positional adjustment of the fixture without
use of tools.
A further object of the present invention is to provide a
recessed-type lighting fixture in which a lamp housing can be
selectively vertically adjusted with respect to the ceiling
aperture without use of tools.
And another object of this invention is to provide a recessed-type,
vertically adjustable, lighting fixture that permits vertical
adjustment to positions on opposite sides of the ceiling level, and
to provide a readily connectable skirt means for enclosing the
portion of the lamp housing that extends below the ceiling, in
order to achieve an attractive appearance.
Still another object of this invention is to provide a
recessed-type lighting fixture with multiple degrees of
adjustability for convenience in installation, and which is
characterized by simplicity and effectiveness in operation and by
inexpensiveness of construction.
Other objects and advantages of the present invention will become
apparent from the following description and claims, and the
illustrations in the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a fragmentary perspective view, with portions broken away
for illustrative purposes, showing a lighting fixture constructed
in accordance with the principles of the present invention;
FIG. 2 is a fragmentary cross-sectional view taken on a vertical
section through the longitudinal axis of the fixture, but showing
the light bulb in elevation;
FIG. 3 is a top plan view thereof showing the arrangement of spring
members that provide for adjustability;
FIG. 4 is a fragmentary, exploded top-plan view of portions of the
lighting fixture illustrated in FIG. 3, to more clearly show the
spring members;
FIG. 5 is an enlarged fragmentary, cross-sectional view taken
substantially along the line 5--5 of FIG. 3;
FIG. 6 is an enlarged fragmentary cross-sectional view taken
substantially along the line 6--6 of FIG. 3;
FIG. 6a is an enlarged fragmentary, cross-sectional view of a
portion of the spring that connects to the hanger bar, and is taken
substantially along the line 6a--6a of FIG. 3;
FIG. 7 is a cross-sectional view similar to FIG. 2 but showing a
portion of the lamp housing extending below the level of the
ceiling and enclosed by supplemental skirt means provided in
accordance with the present invention;
FIG. 8 is an enlarged fragmentary view of one of the hanger members
of the trim ring portion of the supplemental skirt means seen in
FIG. 7;
FIG. 9 is an enlarged fragmentary cross-sectional view of the lower
right-hand portion of the skirt means and trim ring illustrated in
FIG. 7; and
FIG. 10 is an elevational view, with portions broken away for
illustrative purposes, showing the fixture of FIG. 1 with the lamp
housing in its partially extended position below the level of the
ceiling.
DETAILED DESCRIPTION OF THE ILLUSTRATIVE EMBODIMENT
Referring to the drawings, a structural wall element, in this
instance a ceiling 10, has positioned thereabove a plurality of
elongated, parallel, mounting or hanger bars 12, which are
supported from ceiling-support structure (not shown) and which
support the lighting fixture. The lighting fixture includes a lower
frame portion or mounting 14, as best seen in FIGS. 2-6, which has
thereon a means for securement of the lighting fixture to the
mounting bars 12. The lower frame portion 14 provides certain
elements herein identified, and may conveniently be an aluminum die
casting.
Frame portion 14 includes annular section 16 shaped to provide a
depending ring 18 that surrounds an open center and having an
outturned flange 20 at its upper end. A pair of spring-mounting
means 22, that each includes a pair of elongated posts 24 and
adjacent shorter posts 25, extend upwardly from diametrically
opposite sides of the ring flange 20. At right angles to said
diametric arrangement of means 22 is a junction box means 26 that
includes a box base 28 spaced laterally of flange 20 by a pair of
cantilever supports flanges 30 that are cast integral with section
16 and are appropriately rigidified and reinforced by transverse
flanges 31 as shown.
Spring-biased, sheet-metal mounting means 32 carried on posts 24
are provided with outwardly-extending flanges 34 that are slotted
to have an elongated hanger bar 12 extend therethrough. Although
only one such means 32-34 is shown in FIG. 1, the diametrically
arranged posts 24 are adapted to provide two such supports for
connection to two parallel spaced hanger bars 12. It will thus be
understood that the arrangement operates to locate flange 20 and
the lower end of ring 18 in planes parallel to and spaced below
hanger bars 12. Each support means 32-34 is defined by two sheet
metal spring parts, as seen in exploded view, FIG. 4, and
additional slot and screw adjustment means 35 are provided for
vertical adjustment between the two sheet metal spring parts.
The hanger bars 12 are received through slots 40 defined on the
pair of bar-gripping flanges 34 which are joined together to form a
generally lazy-V shaped first spring member of sheet metal which,
as shown most clearly in FIGS. 3 and 4, secures through its bight,
or mid-portion, to the bight of the second sheet metal part, namely
bracket 42, by means of the slot and screw means 35 that provides
for selective vertical adjustment. Slots 40 are located so that
when out-turned flanges 34a defined at the ends of flanges 34 are
manually squeezed and brought closer together against the natural
bias of the spring member, the slots will be aligned and moved to
an altitude to allow hanger bar 12 to be easily inserted through
the slots and to disengage from frictional gripping of bar 12 when
longitudinal adjustment along the parallel bars 12 is desired. When
flanges 34a are released from such manual pressure, the flanges 34
in which slots 40 are defined will frictionally engage and grip
hanger bars 12 to restrain sliding movement of the light fixture
along the hanger bars 12.
In certain circumstances it may be desirable to use hanger bars in
which the larger flat surface lies in a horizontal plane, in
contrast to the vertically disposed arrangement of the hanger bars
12 as illustrated in FIG. 1. To this end, slots 40 are generally
L-shaped (see FIG. 6a) so that they can receive support bars with
their surfaces lying in either a horizontal plane or a vertical
plane, or can receive bars having a cross-sectional configuration
that may be L-shaped for greater strength and rigidity.
The second sheet metal part, bracket 42, is a one-piece stamping
formed of spring steel and shaped as shown to provide
post-encircling portions, with outstanding wings. Each wing
includes a horizontal spring steel flange member 44 and a vertical
flange portion 46, and each wing is spring biased radially inwardly
toward a gripping engagement with a can-shaped housing. Each
vertical flange 46 has a V-shaped protuberance 48 struck therefrom,
as seen in FIGS. 3-5, for engagement with one of a plurality of
axially spaced circumferential grooves 50 in the wall of a
can-shaped housing or body 51. In FIGS. 1-6 the can 51 is shown
spaced above ring 18 while in FIGS. 7 and 10 the can body 51 has a
portion extending below ring 18. Each circumferential groove 50 has
one or more apertures or locking slots 52 for receiving
therethrough a portion of a protuberance 48, so as to prevent the
can 51 from rotating relative to the protuberances, such as when a
torque force is applied thereto when changing light bulbs with a
screwing motion. The bracket 42 is shaped to provide curl portions
43 for encircling engagement with posts 24.
As best seen in FIG. 4, the bracket 42 is shaped to provide a
central vertical channel track 42a of a size to slidingly receive
channel-shaped bight 34b and to prevent skewing of member 34
relative to bracket 42. Transverse flanges 34c at the upper and
lower edges of member 34 provide additional rigidity to bight 34b
and to flanges 34. The slot and screw means 35 includes elongated
slot 35a in channel track 42a and threaded aperture 35b in bight
34b for receiving the threaded stud of headed screw 35c.
While bracket 42 may be secured to posts 24 by a press fit of curls
43 onto posts 24, the posts could also be prepared for receiving
snap ring retainers for engaging the edge of bracket 42 after
assembly onto posts 24.
The shorter studs 25 on ring 16 are located to pass through
enlarged apertures 54 in the horizontal flange members 44. This
arrangement operates to limit movement of members 44 and
protuberances 48 toward and away from can-shaped body 51 to prevent
springing, or permanent set, of the parts.
A junction box 56 on the top of the can housing 51 provides a means
for aiding in carrying, and effecting an electrical connection to,
a light bulb 58 within the can as is well known in the art.
Located interiorly of frame ring 16 and of can 51 there is a baffle
or reflector 60 with a circular lower edge as is well known in the
art. The baffle may be in various shapes and of various material,
but as shown in FIGS. 1 and 2 it typically has a cylindrical body
60.
The can 51 can be raised or lowered with respect to frame ring
portion 14 by pulling the spring steel members 44 outwardly to
release protuberances 48 from their receiving grooves 50 and
apertures 52 to allow the can 51 to move axially with respect to
the frame 14. In the position shown in FIG. 1, can 51 is in its
uppermost position wherein the bottom edge of can 51 is above the
lowermost portion of frame 14. In its position of FIG. 7, can 51
has been extended downwardly to its lowermost position so that a
major portion of the can extends below the lowermost portion of
frame 14. In FIG. 10, can 51 is at an intermediate position
relative to frame 14.
In order to provide an attractive appearance when the can 51 is
lowered as in FIGS. 7 and 10, an attractive shield in the form of
skirt means, generally 70, is used to enclose the portion of can 51
which extends below the frame 14. The skirt means 70 includes three
angle-shaped hanger straps 72 and an outer decorative sleeve member
76, Each strap 72 has a long upright leg 72a and a short out-turned
apertured flange 74. The straps 72 are equally spaced
circumferentially of can 51, and each is secured thereto by a screw
73 whose threaded stem extends radially outwardly through the wall
of can 51 and through leg 72a. The leg 72a is apertured at 72b,
below the lower edge of can 51, to receive the out-turned
securement hook of a trim ring.
The decorative sleeve member 76 has an outer upright cylindrical
wall, and a lower inturned flange 78 with apertures therein for
alignment with apertures in flanges 74. The length of the upright
cylindrical wall is selected so as to locate flange 78 just below
flanges 74 and to have the upper edge of sleeve member 76 located
closely to the surface of the ceiling. Comparison of FIGS. 7 and 10
show how the axial length of sleeve member 76 may be required to be
of varying length.
In a field installation, explosive blind rivets 80 or pop rivets as
they are commonly known, are used to secure flange 78 to apertured
flanges 74. Then a trim ring 82 is secured to cover the lower edge
of the skirt means 70. The trim ring 82 includes out-turned flange
82a of a dimension to shield flange 78 and in-turned flange 82b
that provides a shoulder for engaging the lower end of baffle 60 to
support same in position as in FIG. 7. Ring 82 includes three
equally-spaced upstanding suspension straps 84alocated in the plane
of sleeve member 84, with out-turned hooks or lips 84b for entry
into apertures 72b in straps 72.
With baffle 60 in the lowered position of FIG. 7, the cylindrical
wall of said baffle lies closely adjacent the straps 84 and
prevents inadvertent disengagement of hooks 84b from apertures 74b.
In order to remove trim ring 82, the baffle 60 is pushed upwardly,
into can 51 a distance sufficient to clear the upper edge of hooks
84b thus permitting manipulation to remove the hooks and the trim
ring.
The same trim ring 82 may be used with frame ring 16 to support
baffle 60 when the can 51 is in raised position as seen in FIG.
2.
It can be seen that a versatile and easy-to-install lighting
fixture has been provided, in which the fixture is axially movable
with respect to ceiling joists to which the fixture is connected.
Further, the lighting fixture can be relamped or inspected above or
below without the use of tools.
Although an illustrative embodiment of the invention has been shown
and described, it is to be understood that various modifications
and substitutions may be made by those skilled in the art without
departing from the spirit and scope of the present invention.
* * * * *