Abstrict In an exit sign, a cover member for an emergency exit sign has
a pair of hook members on its bottom wall and a pair of resilient
spring finger members on its top wall. The hook members are dimensionally
sized and appropriately positioned to engage catch members on an
exit sign housing while the spring finger members resiliently snap
fit within spaced apart apertures in the top wall of the exit sign
housing thereby retaining the cover member in its closed position.
A pair of flexible straps secure the cover member to the exit sign
housing to keep them in assembly when the cover member is in its
open position.
Claims What is claimed is:
1. An exit sign comprising:
(a) a generally rectangularly shaped housing containing lighting
components and having an open side for receiving a cover member;
(b) a cover member dimensionally sized to be received on said open
side of said housing; and
(c) means releasably retaining said cover member on said open side
of said housing, said releasably retaining means comprising:
(i) a positioner on said cover member and a mating positioner on
said housing, said positioner and mating positioner relatively position
said cover member on said open side of said housing, and
(ii) at least one resilient finger member on one of said cover
member and said housing and at least one mating aperture on the
other of said cover member and said housing, said at least one resilient
finger member mates with said at least one mating aperture to releasably
retain said cover member on said open side of said housing.
2. An exit sign in accordance with claim 1 wherein each said resilient
finger member has an aperture engaging surface which is resiliently
biased into an associated one of said at least one mating aperture.
3. An exit sign in accordance with claim 1 wherein each said resilient
finger member has a hook-like profile.
4. An exit sign in accordance with claim 1 wherein each said resilient
finger member is cantilevered from said cover member and mates with
an associated one of said at least one apertures on said housing.
5. An exit sign in accordance with claim 4 wherein each said resilient
finger member has a free end dimensionally sized and placed so as
to engage said housing and bias said resilient finger member as
said cover member is moved from an open position spaced from said
open side of said housing to a closed position on said open side
of said housing.
6. An exit sign in accordance with claim 5 wherein said at least
one resilient finger member is disengaged from said at least one
aperture in the open position and said at least one resilient finger
member is matingly engaged in said at least one aperture in the
closed position.
7. An exit sign in accordance with claim 1 wherein said at least
resilient finger member is formed from a steel material.
8. An exit sign in accordance with claim 1 wherein said at least
one mating aperture opens to an exterior of the exit sign thereby
permitting engagement by a user of said at least one resilient finger
from the exterior of the exit sign to release said at least one
resilient finger from said at least one mating aperture.
9. An exit sign in accordance with claim 1 wherein said at least
one resilient finger member is located adjacent a top wall of said
cover member and said at least one mating aperture is defined in
a top wall of said housing.
10. An exit sign in accordance with claim 9 wherein said positioner
is on a bottom wall of said cover member and said mating positioner
is on a bottom wall of said housing.
11. An exit sign in accordance with claim 1 wherein one of said
positioner and said mating positioner is at least one hook-like
member, the other is at least one catch for retaining said at least
one hook-like member to relatively position said cover member on
said open side of said housing.
12. An exit sign in accordance with claim 11 wherein said positioner
is on said cover member and is said at least one hook-like member
which engages said mating positioner which is on said housing, said
mating positioner is said at least one catch for retaining said
at least one hook-like member to relatively position said cover
member on said open side of said housing.
13. An exit sign in accordance with claim 1 further including
at least one strap interconnecting said housing and said cover member.
14. An exit sign in accordance with claim 13 wherein said at least
one strap suspends said cover member from said housing when said
cover is in an open position with said at least one resilient finger
member disengaged from said at least one mating aperture.
15. An exit sign in accordance with claim 1 wherein one of said
housing and cover member has at least one threaded boss and each
said at least one resilient finger member is attached to an associated
one of said at least one threaded boss by means of a screw.
16. An exit sign in accordance with claim 1 wherein said cover
member has at least one threaded boss and said positioner is attached
to said at least one threaded boss by means of a screw.
17. An exit sign in accordance with claim 16 wherein said housing
member has at least one threaded boss and said mating positioner
is attached to said at least one threaded boss by means of a screw.
18. An exit sign in accordance with claim 1 wherein said housing
member has at least one threaded boss and said mating positioner
is attached to said at least one threaded boss by means of a screw.
19. An exit sign comprising:
(a) a generally rectangularly shaped housing containing lighting
components and having an open side for receiving a cover member;
(b) a cover member dimensionally sized to be received on said open
side of said housing, said cover member has at least one threaded
boss; and
(c) means releasably retaining said cover member on said open side
of said housing, said releasably retaining means comprising:
(i) a hook-like positioner on said cover member and a mating positioner
releasably retained on said housing to create a catch for said hook-like
positioner, said hook-like positioner engages said mating positioner
to relatively position said cover member on said open side of said
housing, said hook-like positioner is attached to said at least
one threaded boss by means of a screw, and
(ii) at least one member on one of said cover member and said housing
and at least one mating element on the other of said cover member
and said housing, said at least one member mates with said at least
one mating element to releasably retain said cover member on said
open side of said housing.
20. An exit sign in accordance with claim 19 wherein said hook-like
positioner is on a bottom wall of said cover member and said mating
positioner is on a bottom wall of said housing.
21. An exit sign in accordance with claim 19 further including
at least one strap interconnecting said housing and said cover member.
22. An exit sign in accordance with claim 21 wherein said at least
one strap suspends said cover member from said housing when said
cover is in an open position with said at least one member disengaged
from said at least one mating element.
23. An exit sign in accordance with claim 19 wherein said housing
member has at least one threaded boss and said mating positioner
is attached to said at least one threaded boss by means of a screw.
24. An exit sign comprising:
(a) a generally rectangularly shaped housing containing lighting
components and having an open side for receiving a cover member,
said housing member has at least one threaded boss;
(b) a cover member dimensionally sized to be received on said open
side of said housing; and
(c) means releasably retaining said cover member on said open side
of said housing, said releasably retaining means comprising:
(i) a hook-like positioner on said cover member and a mating positioner
releasably retained on said housing to create a catch for said hook-like
positioner, said hook-like positioner engages said mating positioner
to relatively position said cover member on said open side of said
housing, said mating positioner is attached to said at least one
threaded boss by means of a screw, and
(ii) at least one member on one of said cover member and said housing
and at least one mating element on the other of said cover member
and said housing, said at least one member mates with said at least
one mating element to releasably retain said cover member on said
open side of said housing.
25. An exit sign in accordance with claim 24 wherein said hook-like
positioner is on a bottom wall of said cover member and said mating
positioner is on a bottom wall of said housing.
26. An exit sign in accordance with claim 24 further including
at least one strap interconnecting said housing and said cover member.
27. An exit sign in accordance with claim 26 wherein said at least
one strap suspends said cover member from said housing when said
cover is in an open position with said at least one member disengaged
from said at least one mating element.
Description BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates generally to emergency exit signs
and, more particularly, to mounting covers on emergency exit signs.
2. Description of the Background Art
Under current local fire and building codes, buildings to which
the public has access are required to have signage therein identifying
the exits. Most of these exit signs are required to exhibit a specific
amount of illumination and, oftentimes, must have an emergency backup
power source to provide emergency illumination for a specified period
of time during periods when utility power to the building is discontinued,
thereby facilitating egress of persons from the building.
Traditionally, exit signs have housings formed from sheet metal,
plastic and/or cast aluminum on which are mounted one or more covers
having an exit stencil thereon. These components cooperate to form
an enclosure for the necessary electrical lighting components such
as low voltage lamps as well as appropriate wiring, transformers
and auxiliary power supplies. The covers should be easily mountable
but provide tamper-resistance for the exit signs.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a novel exit
sign mounting for its cover which allows hooking of the cover to
the housing.
It is also an object to provide such a mounting having a snap interconnection
allowing expedited fastening of the cover.
Still another object is to provide such a mounting which makes
the exit sign is tamper resistant.
A further object is to provide such a mounting which may be readily
and economically fabricated and will enjoy a long life in operation.
It has now been found that the foregoing and related objects can
be readily attained in an exit sign having a cover member which
has a pair of hook members on its bottom wall and a pair of resilient
spring finger members on its top wall. The hook members are dimensionally
sized and appropriately positioned to engage catch members on an
exit sign housing while the resilient finger members resiliently
snap fit within spaced apart apertures in the top wall of the exit
sign housing thereby retaining the cover member in its closed position.
A pair of flexible straps secure the cover member to the exit sign
housing to keep them in assembly when the cover member is in its
open position.
The invention will be fully understood when reference is made to
the following detailed description taken in conjunction with the
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of an exit sign embodying the present
invention;
FIG. 2 is a perspective view of the exit sign with its cover member
in its open position to illustrate internal structure;
FIGS. 3 and 4 are side and bottom views respectively of the catch
member;
FIGS. 5 6 and 7 are side, rear and bottom views respectively of
the hook member;
FIG. 8 is a partial perspective exploded view of the exit sign
housing with a portion broken away showing installation of the catch
member of FIGS. 3 and 4;
FIG. 9 is a partial perspective exploded view of the cover member
showing installation of the hook member of FIGS. 5 6 and 7 and
the flexible plastic strap;
FIGS. 10 11 and 12 are side, rear and bottom views respectively
of the resilient finger member;
FIG. 13 is a partial perspective exploded view of the cover member
showing installation of the resilient finger member of FIGS. 10
11 and 12; and
FIGS. 14 through 17 are cross-sectional views of the exit sign
of the present invention showing installation of the cover member
from its open position to its closed position on the exit sign housing.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring first to FIG. 1 of the drawings, therein illustrated
is the exit sign construction of this invention generally designated
by the numeral 10. The exit sign 10 has an exit sign housing generally
indicated by the numeral 12 mountable to both a canopy bracket (not
shown) which is in turn mountable to a standard electrical junction
box (not shown) in a manner explained in a copending U.S. Ser. No.
09/124570 filed Jul. 29 1998. With this arrangement, the exit
sign construction of this invention can be mounted directly to a
standard electrical junction box found in a ceiling or wall of a
building in any desired location.
As seen in FIG. 2 the exit sign housing 12 is a rectangularly
shaped aluminum-cast frame formed by top wall 14 side walls 16
18 bottom wall 20 and rear wall 22. Detachably mounted to an open
side of the exit sign housing 12 is an aluminum-cast cover member
24 formed by a top wall 26 side walls 28 30 bottom wall 32 and
front wall 34. The front wall 34 incorporates a large stencil 36
having the letters "EXIT" and removable arrows 38 in the
major surface thereof and a colored plastic diffuser 40 therebehind.
Depending on the type of installation and the needs of the user,
the rear wall 22 could also have an "EXIT" stencil and
a colored plastic diffuser in a manner similar to the cover member
24 as would be apparent to those skilled in the art. The exit sign
housing 12 and the cover member 24 are dimensionally sized to fit
together by means of cooperating extending lips 42 and 44 thereon
in a manner to be explained further hereinafter thereby cooperating
to form an enclosure for the necessary electrical lighting components
such as low voltage light emitting diodes 46 located in an internal
plastic container 47 as well as appropriate wiring, transformer
and auxiliary power supply (all not shown).
Referring now to FIGS. 3 through 9 taken in conjunction with FIG.
2 the exit sign housing 12 has a plurality of threaded bosses 48A,
48B extending from its rear wall 22 along its bottom wall 20 while
the cover member 24 has an equal number of threaded bosses 50A,
50B extending from its front wall 34 along its bottom wall 32. The
threaded bosses 48A receive screws 52 which extend through an aperture
54 defined in each steel catch member of mating positioner 56 to
secure the catch members 56 to the exit sign housing 12. Similarly,
the threaded bosses 50A receive screws 58 which extend through an
aperture 60 defined in each steel hook member on hook-like positioner
62 to secure the hook members 62 to the cover member 24. An edge
surface 64 of each hook member 62 indexes against the bottom wall
32 to properly align the hook members 62. To keep the cover member
24 secured to the exit sign housing 12 a pair of flexible plastic
straps 66 are secured between the threaded bosses 48B and 50B by
screws 68 and washers 70.
With reference to FIGS. 10 through 13 taken in conjunction with
FIG. 2 the cover member 24 has threaded bosses 72 extending from
its front wall 34 along its top wall 26. The threaded bosses 72
receive screws 74 which extend through an aperture 76 defined in
each resilient steel hook-like finger member 78 to secure the resilient
finger members 78 in a cantilevered manner to the cover member 24.
A curved corner surface 80 of each resilient finger member 78 indexes
against the top wall 26 to properly align the resilient finger members
78. It should be noted here that the top wall 14 of the exit sign
housing 12 has a pair of spaced apart apertures 82 (FIGS. 1 and
2) dimensionally sized and appropriately positioned to receive curved
engagement portions 84 (FIGS. 2 10 11 and 12) of the resilient
finger members 78 when the cover member 24 is positioned on the
exit sign housing 12 in its closed position.
Turning now to FIGS. 14 through 17 the procedure for installation
of the cover member 24 on the exit sign housing 12 can be understood
therefrom. The cover member 24 in its open position shown in FIG.
14 is suspended by the resilient plastic straps 66 whereby the user
can easily service the exit sign 10 as needed. To install the cover
member 24 to its closed position on the exit sign housing 12 the
user simply rotates the cover member 24 upward and positions the
hook members 62 over the catch members 56 as shown in FIG. 15. Continued
rotation of the cover member 24 relative to the exit sign housing
12 causes the resilient finger members 78 to deflect as they engage
the top wall 14 of the exit sign housing 12. When the cover member
24 reaches its closed position as seen in FIGS. 16 and 17 the curved
engagement portions 84 of the resilient finger members 78 resiliently
snap fit within the spaced apart apertures 82 in the top wall 14
of the exit sign housing 12 thereby retaining the cover member 24
in its closed position. It should be noted from FIG. 17 that, in
the closed position, the lips 42 44 of the exit sign housing 12
and the cover member 24 tightly interfit. To reverse the snap-fitting
arrangement of the first resilient finger members 78 and the spaced
apart apertures 82 the user would insert a screw driver (not shown)
into each of the spaced apart apertures 82 from the exterior of
the exit sign housing 12 until the curved engagement portions 84
of each finger member disengages from its aperture 82. The cover
member 24 could then be rotated to its open position (FIG. 14).
It should be appreciated by those skilled in the art that the resilient
finger members 78 provide sufficient retaining force whereby it
is difficult for a vandal to remove the cover member 24 by merely
pulling on it without following the above mentioned opening procedures.
Additionally, the tight interfit of the lips 42 44 increases the
difficulty by providing little pulling leverage for a vandal. Finally,
the position of the apertures 82 in the top wall 14 of the housing,
which would not normally be visible from ground level when the exit
sign 10 is installed in its normal operating position on a wall
or a ceiling, also makes it difficult for a vandal to discover the
necessary opening procedures.
It will therefore be seen from the above that the present invention
provides an effective means for facilitating installation of a cover
member on an exit sign housing.
It will thus be seen that the objects set forth above, among those
made apparent from the preceding description, are efficiently attained
and, since certain changes may be made in the above product without
departing from the scope of the invention, it is intended that all
matter contained in the above description or shown in the accompanying
drawings shall be interpreted as illustrative and not in a limiting
sense.
It is also to be understood that the following claims are intended
to cover all of the generic and specific features of the invention
herein described, and all statements of the invention which, as
a matter of language, might be said to fall therebetween. |