U.S. patent number RE35,691 [Application Number 08/393,344] was granted by the patent office on 1997-12-16 for adjustable mounting mechanism for an optical filter screen.
This patent grant is currently assigned to Minnesota Mining and Manufacturing Company. Invention is credited to Gerald E. Drake, Scott G. Theirl.
United States Patent |
RE35,691 |
Theirl , et al. |
December 16, 1997 |
Adjustable mounting mechanism for an optical filter screen
Abstract
An optical filter screen for a visual display monitor includes
an optical filter supported by a support frame. A pair of
adjustable mounting members support the support frame from the
visual display monitor such that the optical filter is positioned
adjacent a display area of the display monitor. Each mounting
member includes a latch member that is movable between an unlatched
state wherein the filter can be moved relative to the display area
of the display monitor and a latched state wherein the filter is
held in a desired position relative to the display area. Each
mounting member further includes a movable latch operator for
moving the latch member between the latched state and the unlatched
state.
Inventors: |
Theirl; Scott G. (Oakdale,
MN), Drake; Gerald E. (Oakdale, MN) |
Assignee: |
Minnesota Mining and Manufacturing
Company (Saint Paul, MN)
|
Family
ID: |
25380924 |
Appl.
No.: |
08/393,344 |
Filed: |
February 23, 1995 |
Related U.S. Patent Documents
|
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
Reissue of: |
882588 |
May 13, 1992 |
05227916 |
Jul 13, 1993 |
|
|
Current U.S.
Class: |
359/609; 359/601;
348/834; 348/842 |
Current CPC
Class: |
H04N
5/65 (20130101); H01J 29/896 (20130101); G02B
7/006 (20130101); H04N 5/72 (20130101); G06F
1/1609 (20130101) |
Current International
Class: |
H04N
5/65 (20060101); G02B 7/00 (20060101); H01J
29/89 (20060101); H04N 5/72 (20060101); G02B
027/00 () |
Field of
Search: |
;359/601,609,610,613,742
;348/834,842 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
Product literature entitled "Mounting and Care Instructions" from
Optical Coating Labs, Santa Rosa, California. .
Product literature entitled "Polaroid CP Computer Filter" from
Polaroid Corporation, Cambridge, Massachusetts. .
Product literature entitled "3M Universal Privacy Filter" from
Minnesota Mining and Manufacturing Company, St. Paul,
Minnesota..
|
Primary Examiner: Ben; Loha
Attorney, Agent or Firm: Griswold; Gary L. Kirn; Walter N.
Buckingham; Stephen W.
Claims
What is claimed is:
1. An optical filter screen for a visual display monitor,
comprising:
a support frame defined by a top member, first and second side
members and a bottom member;
an optical filter supported by the support frame; and
an adjustable mounting means for supporting the support frame from
a visual display monitor such that the filter is positioned
adjacent a display area of the display monitor, the mounting means
including:
a latch means movable between an unlatched state wherein the filter
can be moved relative to the display area of the display monitor
and a latched state wherein the optical filter is held in a desired
position relative to the display area of the display monitor;
and
a movable latch operating means for moving the latch means between
the unlatched state and the latched state.
2. The filter screen of claim 1 wherein the latch means is movable
in a first direction between the latched state and the unlatched
state, and the latch operating means is movable in a second
direction substantially perpendicular to the first direction to
actuate the latch means between the latched and unlatched
states.
3. The filter screen of claim 1 wherein the mounting means
includes:
first and second mounting members engageable with the first and
second side members, respectively of the support frame, each
mounting member including a latch means defined by a movable latch
member and a latch operating means defined by a movable latch
operator.
4. The filter screen of claim 3 wherein each mounting member
includes:
a stem element having a first end and an opposite second end:
and
a support element extending outwardly from the first end of the
stem element, the support element being adapted to engage a top
surface of the visual display monitor for supporting the support
frame of the filter screen.
5. The filter screen of claim 4 wherein each of the first and
second side members includes a longitudinal channel, and wherein
each mounting member further includes:
a leg member extending outwardly from the second end of the stem
element, the leg member having a ledge portion that is adapted to
engage the longitudinal channel of the respective side member of
the support frame, the longitudinal channel allowing longitudinal
movement of the mounting member relative to the side member of the
support frame.
6. The filter screen of claim 5 wherein each of the first and
second side members further includes a longitudinal slot, and
wherein the latch operator of each mounting member includes:
a ledge element that is adapted to engage the longitudinal slot of
the respective side member of the support frame, the longitudinal
channel allowing longitudinal movement of the mounting member
relative to the side member of the support frame.
7. The filter screen of claim 6 wherein each of the first and
second side members of the support frame further includes a cutout
section along the longitudinal slot, that permits the ledge element
of the respective mounting member to be disengaged from the slot to
allow the mounting member to be removed from the support frame of
the filter screen.
8. The filter screen of claim 3 wherein each of the first and
second side members of the support frame includes a plurality of
linearly aligned latch recesses, and wherein the latch member of
the respective mounting member is selectively engageable with a
desired latch recess, in the latched state of the latch member, to
define the desired position of the antiglare filter relative to the
display area of the display monitor.
9. The filter screen of claim 3 wherein each of the first and
second side members includes a longitudinal slot, and wherein the
latch operator of each mounting member includes:
a ledge element that is adapted to engage the longitudinal slot of
the respective side member of the support frame, the longitudinal
channel allowing longitudinal movement of the mounting member
relative to the side member of the support frame.
10. The filter screen of claim 9 wherein each of the first and
second side members of the support frame further includes a cutout
section along the longitudinal slot, that permits the ledge element
of the respective mounting member to be disengaged from the slot to
allow the mounting member to be removed from the support frame of
the filter screen.
11. The filter screen of claim 3 wherein the latch operator of each
mounting member incudes a cam member and wherein the latch member
is movable between a disengaged state, wherein a cam member is
spaced from the latch member, and an engaged state, wherein the cam
member is engaged with the latch member so as move the latch member
from the latched state to the unlatched state and thereby permit
the respective mounting member to be moved relative to the support
frame.
12. The filter screen of claim 11 wherein the latch member is
movable in a first direction between the latched state and the
unlatched state, and the latch operator is movable in a second
direction, substantially perpendicular to the first direction,
between the engaged state and the disengaged state. .Iadd.
13. An optical filter screen for a visual display monitor,
comprising:
a support frame defined by a top member, first and second side
members and a bottom member;
an optical filter supported by the support frame;
mounting means for supporting the support frame from a visual
display monitor such that the filter is positioned adjacent a
display area of the display monitor, the mounting means including
releasably sliding engagement means for releasably slidably
engaging the first and second side members of the support
frame..Iaddend..Iadd.14. The optical filter screen of claim 13
wherein the first and second side members of the support frame each
include front, back and side outer surfaces, and wherein at least
one of the outer surfaces of at least one of the side members
carries a plurality of latch recesses, and wherein the mounting
means includes at least one movable latch member having a portion
thereof releasably engageable with the latch
recesses..Iaddend..Iadd.15. The optical filter screen of claim 14,
wherein the releasably engageable portion of the latch member may
be flexed between an unlatched state, wherein the releasably
engageable portion is disengaged from the latch recesses and the
optical filter may be vertically positioned relative to the display
area of the display monitor, and the latched state, wherein the
releasably engageable portion is engaged to the latch recesses and
the optical filter is held in the desired vertical
position..Iaddend..Iadd.16. The optical filter screen of claim 15,
wherein the mounting means further comprises latch operator means
for disengaging the latch member from the latch recesses in the
flexed unlatched state of the latch member..Iaddend..Iadd.17. The
optical filter screen of claim 14, wherein the mounting means
further comprises:
a stem element having a first end and an opposite second end;
and
a support element extending outwardly from the first end of the
stem element, the support element display monitor for supporting
the support frame of the filter screen..Iaddend..Iadd.18. The
optical filter screen of claim 17, wherein said sliding engagement
means comprises:
longitudinal channels on the front and back surfaces of each of the
first and second side members; and
leg members extending outwardly from the second end of the stem
element, each leg member having a mating member that is adapted to
engage the longitudinal channel of the respective side member of
the support frame, the longitudinal channels allowing longitudinal
movement of the mounting member relative to the side member of the
support frame..Iaddend..Iadd.19. The optical filter screen of claim
18, wherein the leg members are flexibly attached to the stem
element for facilitating engagement to the support
frame..Iaddend..Iadd.20. The optical filter screen of claim 14,
wherein the latch recesses are separated by latch ridges, the latch
ridges having angled top surfaces and perpendicular bottom
surfaces..Iaddend..Iadd.21. An optical filter screen for a visual
display monitor, comprising:
a support frame defined by a top member, first and second side
members and a bottom member, the first and second side members each
including front, back and side outer surfaces, the front and back
outer surfaces of the first and second side members having
longitudinal channels and the first and second side members having
a plurality of latch recesses;
an optical filter supported by the support frame;
a stem element having a first end and an opposite second end;
a support element extending outwardly from the first end of the
stem element, the support element being adapted to engage a top
surface of the visual display monitor for supporting the support
frame of the filter screen;
a flexible latch member integrally formed within the stem element,
the latch member having at least one tooth member for releasably
engaging with the latch recesses; and
leg members extending outwardly from the second end of the stem
element, each leg member having a mating member that is adapted to
engage the longitudinal channel of the respective side member of
the support frame, the longitudinal channels allowing longitudinal
movement of the stem element relative to the side member of the
support frame..Iaddend.
Description
BACKGROUND OF THE INVENTION
The present invention relates generally to the field of optical
filter screens. In particular, the present invention is an
adjustable mounting mechanism for an optical filter screen usable
with a visual display monitor.
Typically, translucent, optical filter screens are mounted to
visual display monitors (e.g., computer monitors that employ a
scanning electron tube display area) in such a manner as to extend
over the front of the display area, their purpose being to reduce
glare, increase contrast, provide privacy, provide radiation
shielding, or a combination of these functions. By reducing the
glare from the display area of the display monitor or increasing
its contrast, eye fatigue associated with the prolonged use of
display monitors is greatly reduced.
Optical filter screens having mounting mechanisms for securing the
screens to visual display monitors are generally known. One
antiglare screen and mounting mechanism is available from Optical
Coating Labs Inc. and is shown in prior art FIGS. 1-3. As seen in
FIG. 1, the prior art optical antiglare screen 10 includes a frame
12 defined by a top member 14, side members 16 and a bottom member
18. Supported within the frame 12 is a translucent, optical
antiglare filter 20. A mounting mechanism 22 supports the antiglare
screen 10 from a top surface 24 of a visual display monitor, such
as a computer monitor 26, so that the optical antiglare filter 20
is positioned in front of a display area 28 of the computer monitor
26. The mounting mechanism 22 includes a pair of mounting members
30A and 30B. The mounting member 30B is a mirror image of the
mounting member 30A, so only the mounting member 30A will be
described with particularity.
As seen best in prior art FIG. 2, the mounting member 30A includes
a stem element 32A having a first end 34A and a second end 36A.
Integral with the first end 34A of the stem element 32A is a
support element 38A that extends substantially perpendicular to the
longitudinal extent of the stem element 32A. As seen best in prior
art FIG. 1, the support elements 38A and 38B of the mounting
members 30A and 30B, respectively, are adapted to engage the top
surface 24 of the computer monitor 26 to support the antiglare
screen 10. As seen best in prior art FIG. 2 a bottom surface of the
support element 38A includes a foam rubber pad 39A which helps to
prevent movement of the mounting member 30A and thereby the optical
antiglare filter 20 relative to the display area 28 of the computer
monitor 26.
The second end 36A of the stem element 32A includes a first, short
leg 40A and a second, long leg 42A. The short leg 40A and the long
leg 42A are integral with and extend substantially perpendicular to
the stem element 32A. A free end of the long leg 42A includes an
outwardly extending ledge portion 44A.
As seen best in prior art FIG. 3, when the mounting member 30A is
secured to the side member 16 of the optical antiglare screen 10,
the stem element 32A engages an outer surface 46, the short leg 40A
engages a front surface 48 and the long leg 42A engages a rear
surface 50 of the side member 16. The ledge portion 44A of the long
leg 42A is adapted to engage an inner surface 52 of the side member
16 of the antiglare screen 10. The stem element 32A, short leg 40A,
long leg 42A and ledge portion 44A are configured to closely
conform to the side member 16 so as to securely fix the mounting
member 30A to the frame 12 and thereby maintain the position of the
mounting member 30A along the side member 16.
As seen in prior art FIG. 3, the position of the mounting member
30A along the side member 16 can be changed by simply flexing the
long leg 42A outwardly in the direction of arrow 54, which causes
the ledge portion 44A to ride over the inner surface 52 allowing
the mounting member 30A to be disengaged from the side member 16 of
the frame 12. By changing the position of the mounting members 30A
and 30B along the side members 16 of the frame 12, the antiglare
filter 20 can be centered relative to the display area 28 of the
computer monitor 26. However, to change the positions of the
mounting members 3OA and 30B, the mounting members 30A and 30B need
to be disengaged from and then re-engaged with the frame 12 in
their desired positions. As such, it is sometimes difficult to
reattach the mounting members 30A and 30B to the respective side
members 16 of the frame 12 in exactly the same position such that
the frame 12 is level and the antiglare filter 20 is centered on
the display area 28. Hence, to properly adjust the antiglare screen
10 of the prior art, at least one of the mounting members 30A and
30B may have to be disengaged from and re-engaged with the frame 12
several times until the antiglare filter 20 is level and adequately
centered with respect to the display area 28 of the monitor 26.
Another filter screen and mounting mechanism known as 3M
"Universal" Privacy Filter is available from the Minnesota, Mining
and Manufacturing Company and is shown in prior art FIGS. 4-6. As
seen in FIG. 4, the prior art filter screen 60 includes a frame 62
defined by a top member 64, side members 66 and a bottom member 68.
Supported within the frame is a louvered filter 70. A mounting
mechanism 72 supports the filter screen 60 from a top surface 74 of
a visual display monitor, such as a computer monitor 76, such that
the filter 70 is positioned in front of a display area (not seen in
FIG. 4) of the monitor 76.
As seen best in prior art FIGS. 5 and 6, the mounting mechanism 72
includes a top mount 78 having a first end 79 and a second end 80.
Adhesively secured to a bottom surface 81 (see FIG. 6) of the first
end 79 is a first element 82 of a hook and loop fastener. A second
cooperating element 83 of hook and loop fastener is adhesively
secured to the top surface 74 of the monitor 76. The first and
second elements 82 and 83 allow the top mount 78, and thereby the
filter screen 60, to be attached to and removed from the monitor
76.
The second end 80 of the top mount 78 is adapted to be received in
a slot 84 in the top member 64 of the frame 62. As seen best in
prior art FIG. 5, within the slot 84 are a pair of spaced latch
members 86. As seen best in prior art FIG. 6, each latch member 86
is integral with the top member 64 of the frame 62 and is defined
by an upright element 87 having a rounded ledge portion 88. The
rounded ledge portions 88 of the latch members 86 are adapted to
selectively engage recesses 90 on the rear surface of the second
end 80 of the top mount 78. The recesses 90 are separated by
rounded ridges 92.
When the ledge portions 88 are engaged with selected recesses 90,
the position of the filter screen 60 is fixed relative to the top
member 78. To adjust the position of the filter screen 60 relative
to the top member 78, the frame 62 is moved (i.e., pulled or
pushed), as represented by doubled headed directional arrow 94,
relative to the top member 78, which causes the rounded ledge
portions 88 to ride over the rounded ridges 92 and flexing of the
upright elements 87 of the latch members 86. The frame 62 is moved
relative to the top member 78 until the ledge portions 88 engage
the desired recesses 90 and the privacy filter 70 is level and
centered on the display area of the monitor 76. However, due to the
amount of pulling or pushing force needed to cause the ledge
portions 88 to ride over the ridges 90 and flexing of the upright
elements 87 of the latch members 86, the ledge portions 88 may move
past (i.e., miss) the desired recesses 90. Hence, to properly
adjust the filter screen 60 of the prior art, the frame 62 may have
to be pushed and pulled several times relative to the top member 78
until the filter 70 is level and adequately centered with respect
to the display area of the monitor 76.
There is a continuing need for improved optical filter screens with
adjustable mounting mechanisms. Specifically, there is a need for
an adjustable mounting mechanism that allows an optical filter
screen to be smoothly and easily adjusted relative to a display
area of a monitor without using a great deal of force or removing
the mounting mechanism from the filter screen. Moreover, there is a
need for an adjustable mounting mechanism that allows the filter
element of the filter screen to be easily leveled and properly
centered with respect to the display area of a monitor with minimal
manual manipulation.
SUMMARY OF THE INVENTION
The present invention is an optical filter screen for a visual
display monitor. The filter screen includes an optical filter
supported by a support frame. An adjustable mounting mechanism,
defined by a pair of mounting members, supports the support frame
from the visual display monitor such that the antiglare filter is
positioned adjacent a display area of the display monitor. Each
mounting member includes a latch member that is movable between an
unlatched state wherein the antiglare filter can be moved relative
to the display area of the display monitor and a latched state
wherein the antiglare filter is held in a desired position relative
to the display area. Each mounting member further includes a
movable latch operator for moving the latch member between the
latched state and the unlatched state.
This optical filter screen with adjustable mounting mechanism is
relatively uncomplicated. By providing the filter screen with a
pair of mounting members, with each mounting member having a latch
member and a latch operator to move the latch member between a
latched state that holds the filter screen in a desired position
relative to a display area of a monitor and an unlatched state that
allows movement of the filter screen relative to the display area,
the filter screen can be smoothly and easily adjusted relative to
the display area without using a great deal of force or removing
the mounting members from the filter screen. Therefore, this
mounting member arrangement allows the filter of the filter screen
to be easily leveled and properly centered with respect to the
display area of the monitor with minimal manual manipulation.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view showing a prior art optical filter
screen and mounting mechanism secured to a visual display
monitor.
FIG. 2 is an enlarged perspective view of a mounting member of the
prior art mounting mechanism of FIG. 1 shown removed from the prior
art filter screen.
FIG. 3 is a sectional view taken along line 3--3 in FIG. 1 of the
prior art mounting member secured to the prior art filter
screen.
FIG. 4 is a perspective view of another prior art optical filter
screen and mounting mechanism secured to a visual display
monitor.
FIG. 5 is an enlarged, exploded perspective view shorting details
of the prior art mounting mechanism shown in FIG. 4.
FIG. 6 is a sectional view taken along line 6--6 in FIG. 4 showing
particulars of the prior art mounting mechanism.
FIG. 7 is a perspective view of an optical filter screen and
mounting mechanism in accordance with the present invention.
FIG. 8 is an enlarged perspective view showing details of a
mounting member of the mounting mechanism and a side member of the
filter screen of FIG. 7.
FIG. 9 is a sectional view taken along line 9--9 in FIG. 8 showing
a latched state of a latch member of the mounting member shown in
FIG. 8.
FIG. 10 is a sectional view, similar to FIG. 9, showing an
unlatched state of the latch member of the mounting member.
FIG. 11 is a sectional view, similar to FIG. 9, with the mounting
member being removed from the side member of the antiglare screen
in accordance with the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
An optical filter screen 100 having a mounting mechanism 102 in
accordance with the present invention is illustrated generally in
FIGS. 7 and 8. The filter screen 100 includes a frame 104 defined
by a top member 106, side members 108 and a bottom member 110.
Supported within the frame 104 is an optical filter 112. As seen
best in FIG. 7, the mounting mechanism 102 supports the filter
screen 100 from a top surface 114 of a visual display monitor, such
as a computer monitor 116, so that the optical filter 112 is
positioned in front of a display area 118 of the computer monitor
116. The mounting mechanism 102 includes a pair of mounting members
120A and 120B. The mounting member 120B is a mirror image of the
mounting member 120A so only the mounting member 120A will be
described with particularity.
As seen best in FIG. 8, the mounting member 120A includes a stem
element 122A having a first end 124A and a second end 126A.
Integral with the first end 124A of the stem element 122A is a
support element 128A that extends substantially perpendicular to
the longitudinal extent of the stem element 122A. As seen best in
FIG. 7, the support elements 118A and 128B of the mounting members
120A and 120B, respectively, are adapted to engage the top surface
114 of the computer monitor 116 to support the filter screen 100,
such that the filter 112 is positioned in front of the display area
118 of the monitor 116. Bottom surfaces of the support elements
128A and 128B include foam rubber pads 130A and 130B, respectively,
which help to prevent movement of the mounting members 120A and
120B and thereby the optical screen 100 relative to the display
area 118 of the computer monitor 116.
As seen best in FIGS. 9-11, the second end 126A of the stem element
122A includes a first leg 132A that is integral with and extends
substantially perpendicular to the stem element 122A. A free end of
the first leg 132A includes an outwardly extending ledge portion
134A. When the mounting member 120A is secured to the side member
108 of the frame 104, the first leg 132A abuts a front surface 136
of the side member 108 and the ledge portion 134A engages a
longitudinal channel 138 that extends along the length of the side
member 108. The longitudinal channel 138 allows the mounting member
120A to be the moved along the length of the side member 108.
The second end 126A of the stem clement 122A further includes a
movable latch member 140A that is integral with the stem element
122A. A free end of the latch member 140A includes an outwardly
extending latch ledge 142A. As seen best in FIG. 8, an outer
surface 144 of the side member 108 includes a plurality of linearly
arranged latch recesses 146. The latch recesses are separated by
latch ridges 148, with each latch ridge 148 having an angled top
surface 150 and a substantially perpendicular bottom surface
152.
As seen in FIG. 8, the stem element 122A includes cutouts 154A and
155A to either side of the latch member 140A. The cutouts 154A and
155A allow the latch member 140A to flex (i.e. move) relative to
the side member 108 of the frame 104 in a direction substantially
parallel to the antiglare filter 112 as presented by the double
headed directional arrow 156 in FIG. 10. The latch member 140A is
movable (i.e., can be flexed) between an unlatched state wherein
the filter screen 100 can be vertically moved (as presented by the
double headed directional arrow 157 in FIG. 8) relative to the
mounting members 120A and 120B and the display area 118 of the
computer monitor 116, and a latched state wherein the filter screen
100 is held in a desired position relative to the display area 118.
The latch ledge 142A is engageable with any one of the plurality of
latch recesses 146 to define the desired position of the antiglare
screen 100.
Mounting member 120A further includes a second leg, or latch
operator 158A which is integral with and extends substantially
perpendicular to the longitudinal extent of the stem element 122A,
A free end of the latch operator 158A includes an outwardly
extending ledge element 160A. As seen in FIGS. 9-11, when the
mounting member 120A is secured to the side member 108 of the frame
104, the latch operator 158A is adjacent a rear surface 161 of the
side member 108 and the ledge element 160A engages a longitudinal
slot 162 that extends along the length of the side member 108. The
longitudinal slot 162 allows the mounting member 120A to be moved
along the length of the side member 108.
As seen best in FIG. 10, the cutout 155A, allows the latch operator
158A to flex (i.e., move) in a direction (as represented by double
headed directional arrow 164 in FIG. 10) perpendicular to the stem
element 122A. The latch operator 158A is manually movable (i.e., by
finger pressure) between a disengaged state, wherein a cam member
166A of the latch operator 158A is spaced from a beveled surface
170A of the latch member 140A (see FIG. 9), and an engaged state,
wherein the cam member 166A is engaged with the beveled surface
170A of the latch member 140A and thereby moves the latch member
140A out of engagement with a recess 146 and thereby permits the
mounting member 120A to be moved relative to the filter screen 100.
Movement of the filter screen 100 relative to the mounting members
120A and 120B allows the filter 112 to be easily leveled and
properly centered with respect to the display area 118 of the
monitor 116.
In addition, the mounting member 120A can be moved in one direction
(as represented by the directional arrow 157) relative to the
filter screen 100 and without actuation of the latch operator 158A,
due to the angled top surfaces 150 of the ridges 148. The angled
top surfaces 150, upon the application of sufficient force to the
mounting member allows the latch member 140A to simply ride over
the ridges 148. The perpendicular bottom surfaces 152 of the ridges
148 would prevent such ease of movement in the opposite direction
to that indicated by arrow 157a.
As seen in FIG. 8, the outer surface 144 of the side member 108
further includes a cutout 172 located below the recesses 146. As
seen in FIG. 11, when the mounting member 120A is positioned such
that the ledge element 160A is centered within the cutout 172, the
mounting member 120A can be removed from the side member 108 of the
frame 104 for the purpose of cleaning or to replace a damaged
mounting member.
The optical filter screen 100 with adjustable mounting mechanism
102 is relatively uncomplicated. By providing the filter screen 100
with a pair of mounting members 120A and 120B, with each mounting
member 120A and 120B having a latch member 140A and 140B and a
latch operator 158A and 158B to move the latch member 140A and 140B
between a latched state that holds the filter screen 100 in a
desired position relative to the display area 118 of the monitor
116 and an unlatched state that allows movement of the filter
screen 100 relative to the display area 118, the filter screen 100
can be smoothly and easily adjusted relative to the display area
118 without using a great deal of force or removing the mounting
members 120A and 120B from the filter screen 100. Therefore, this
mounting member arrangement allows the filter 112 of the filter
screen 100 to be easily leveled and properly centered with respect
to the display area 118 of the monitor 116 with minimal manual
manipulation.
Although the present invention has been described with reference to
preferred embodiments, workers skilled in the art will recognize
that changes may be made in form and detail without departing from
the spirit and scope of the invention.
* * * * *