U.S. patent number 3,778,577 [Application Number 05/320,800] was granted by the patent office on 1973-12-11 for moisture sealing device for toggle switches.
This patent grant is currently assigned to The Singer Company. Invention is credited to John C. Davis, Charles Thomas Fromknecht.
United States Patent |
3,778,577 |
Fromknecht , et al. |
December 11, 1973 |
MOISTURE SEALING DEVICE FOR TOGGLE SWITCHES
Abstract
A cap and wall structure for sealing a toggle switch against
entry of moisture. The cap comprises an annular skirt encapsulating
an annular wall formed about an opening in the wall structure or
cover plate. The cap includes a pair of legs which lock it to the
wall or plate but allows the cap to slide while a pair of tabs
entrap the switch actuating member to actuate the same in response
to movement of the cap.
Inventors: |
Fromknecht; Charles Thomas
(Anderson, SC), Davis; John C. (Greenwood, SC) |
Assignee: |
The Singer Company (New York,
NY)
|
Family
ID: |
23247918 |
Appl.
No.: |
05/320,800 |
Filed: |
January 3, 1973 |
Current U.S.
Class: |
200/302.3;
200/333 |
Current CPC
Class: |
H01H
23/14 (20130101); H01H 23/06 (20130101) |
Current International
Class: |
H01H
23/06 (20060101); H01H 23/00 (20060101); H01H
23/14 (20060101); H01h 009/04 () |
Field of
Search: |
;200/168G,172A |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Schaefer; Robert K.
Assistant Examiner: Smith; William J.
Claims
Having thus described the nature of the invention, what is claimed
herein is:
1. In combination, a wall structure having an opening frmed
therein, an annular forward facing wall forming a border about the
opening, a toggle switch arranged within the opening and having a
forwardly projecting planarly shiftable actuating member, and a
moisture sealing cap, said cap comprising a substantially forwardly
facing wall, an annular skirt rearwardly depending from the
forwardly facing cap wall, the depth of said skirt from the rear
surface of said cap wall being at least equal to the forward facing
depth of the annular wall, said annular skirt having the same
annular shape as the annular wall, the skirt in a plane parallel to
the plane of movement of said member being longer than said annular
wall so as to form a clearance space for movement of said member,
and in a plane normal to the plane of movement of said member the
interior width of said skirt is substantially equal to the exterior
width of said annular wall, said cap including a pair of legs
spaced from the skirt parallel to the plane of movement of the
member depending rearwardly into the opening beyond the wall
structure, each of said legs including means for securing the cap
to the wall structure while allowing the cap to slide in the plane
of member movement, and means in the cap for entrapping the member
so that movement of the cap moves the member.
2. In the combination recited in claim 1 wherein said means for
securing the cap to the wall structure comprises a ledge formed on
the leg, each ledge facing away from said plane of member movement
and underlying the wall structure.
3. In the combination recited in claim 2 wherein said means for
entrapping the member includes a pair of tabs depending from the
cap and spaced on either side of said member in the plane of member
movement.
4. In the combination recited in claim 3 wherein said securing
means includes a groove formed in each of said legs adjacent said
ledge for receiving the wall structure forming each edge of said
opening in planes parallel to member movement.
5. In the combination recited in claim 1 wherein said opening,
annular wall and skirt are substantially rectangular.
6. In combination, a moisture proofing cover plate and cap for a
wall mounted electrical toggle switch, said plate having a
substantially rectangular opening formed therein, an annular
forward facing wall forming a border about said opening, said
switch being mounted behind the opening and having a forwardly
projecting planarly shiftable activating member, said cap
comprising a substantially forwardly facing wall, a rectangular
annular skirt rearwardly depending from the forwardly facing cap
wall, the depth of said skirt from the rear of said cap wall being
at least equal to the forward facing depth of the annular wall, the
skirt in a plane parallel to the plane of movement of said member
being longer than said annular wall so as to form a clearance space
for movement of said member, and in a plane normal to the plane of
movement of said member the interior width of said skirt is
substantially equal to the exterior width of said annular wall,
said cap including a pair of legs spaced from the skirt parallel to
the plane of movement of the member depending rearwardly into the
opening beyond the plate, each of said legs including means for
securing the cap to the plate while allowing the cap to slide in
the plane of movement, and means in the cap for entrapping the
member so that movement of the cap moves the member.
7. In the combination recited in claim 6 wherein said means for
securing the cap to the plate comprises a ledge formed on the leg,
each ledge facing away from said plane of member movement and
underlying the plate.
8. In the combination recited in claim 7 wherein said means for
entrapping the member includes a pair of tabs depending from the
cap and spaced on either side of said member in the plane of member
movement.
9. In the combination recited in claim 8 wherein said securing
means includes a groove formed in each of said legs adjacent said
ledge for receiving a lip of the plate forming each edge of said
opening in planes parallel to member movement.
10. A moisture proofing cover plate and cap adapted for use over a
conventional wall mounted electrical toggle switch having a
forwardly projecting planarly shiftable activating member, said
plate having a substantially rectangular opening formed therein, an
annular forward facing wall forming a border about said opening,
said cap comprising a substantially forwardly facing wall, a
rectangular annular skirt rearwardly depending from the forwardly
facing cap wall, the depth of said skirt from the rear of said cap
wall being at least equal to the forward facing depth of the
annular wall, the skirt in a plane parallel to the plane of
movement of said switch member being longer than said annular wall
so as to form a clearance space for movement of said member, and in
a plane normal to the plane of movement of said member the interior
width of said skirt is substantially equal to the exterior width of
said annular wall, said cap including a pair of legs spaced from
the skirt parallel to the plane of movement of the member depending
rearwardly into the opening beyond the plate, each of said legs
including means for securing the cap to the plate while allowing
the cap to slide in the plane of movement, and means in the cap for
entrapping the member so that movement of the cap moves the
member.
11. In the combination recited in claim 10 wherein said means for
securing the cap to the plate comprises a ledge formed on the leg,
each ledge facing away from said plane of member movement and
underlying the plate.
12. In the combination recited in claim 11 wherein said means for
entrapping the member includes a pair of tabs depending from the
cap and spaced on either side of said member in the plane of member
movement.
13. In combination recited in claim 12 wherein said securing means
includes a groove formed in each of said legs adjacent said ledge
for receiving a lip of the plate forming each edge of said opening
in planes parallel to member movement.
Description
BACKGROUND OF THE INVENTION
This invention relates to moisture proofing devices, and more
particularly to a structure adapted to prevent the entry of liquids
to a conventional toggle type switch.
In addition to the conventional wall switch, most electical
appliances utilize conventional toggle type switches actuated by
the finger of an operator. Many of these appliances are required to
operate outside the home. For example, utility type suction
cleaners such as those disclosed in co-pending U.S. Pat. No.
3,732,667, patented May 15, 1973 and U.S. application No. 320,802
filed Jan. 3, 1973 are used outside for vacuuming patios,
driveways, walks, etc., and may be inadvertently left outdoors. If
the weather changes overnight and a rainstorm develops the switch
may be rendered useless or hazardous unless it is properly sealed
against the entry of moisture. Moreover, there is a trend to build
appliances for outdoor use with a double insulation to protect the
user against a dangerous shock in the event the primary insulation
fails. Furthermore, the conventional wall switch utilized in the
home may not be safe under certain situations, such as those
existing in the bathroom, kitchen or laundry room due to the use of
large amounts of water and the possibility of one operating such
switches being grounded. Moreover, conventional toggle switches may
be utilized outside the home on the patio or deck area and thus
exposed to the elements of the weather.
Although the known prior art has provided many water proof switch
constructions none have provided a simple and effective solution to
this problem.
SUMMARY OF THE INVENTION
It is therefore a primary object of this invention to provide a
simple and effective device for sealing a toggle switch against the
entry of liquid.
Another object of the present invention is the provision of a
moisture proofing switch cap and a cooperating wall or plate
structure which prevents entry of moisture to a toggle type
switch.
A further object of this invention is the provision of a switch cap
in combination with the wall construction of an appliance or the
like which will effectively seal a toggle type switch against entry
of moisture.
A still further object of the invention is to provide a switch cap
and a cooperating cover plate for moisture proofing a conventional
toggle switch.
Briefly, these objects are obtained by providing a switch cap
having an annular skirt cooperating with an annular wall formed
about an opening in the wall structure or cover plate. The cap
includes a pair of legs which snap beneath the wall construction or
cover plate to secure the cap thereto while allowing the cap to
slide to actuate the toggle switching lever.
BRIEF DESCRIPTION OF THE DRAWINGS
The particular features and advantages of the invention as well as
other objects will become apparent from the following description
taken in connection with the accompanying drawings, in which:
FIG. 1 is a top perspective view partially broken away of a
moisture sealing cap constructed in accordance with the present
invention;
FIG. 2 is a bottom perspective view of the cap of FIG. 1;
FIG. 3 is a cross-sectional view of a portion of an appliance floor
or wall incorporating a first embodiment of the present invention
and illustrating the moisture cap and cooperating wall structure
thereof;
FIG. 4 is a cross-sectional view of the construction shown in FIG.
3, but taken at right angles thereto;
FIG. 5 is a top plan view of the wall construction of FIG. 3 with
the cap removed;
FIG. 6 is a cross-sectional view similar to FIG. 3 but of a second
embodiment of the present invention illustrating the moisture
sealing cap and a cooperating wall cover plate, for convenience the
wall has been rotated from the vertical to a horizontal position;
and
FIG. 7 is an elevational view taken through the second embodiment
of FIG. 6, but at right angles thereto.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the accompanying drawings wherein like reference
numerals denote similar parts throughout the various views, a
moisture sealing cap constructed in accordance with the teachings
of the present invention is generally indicated by the reference
numeral 20. The cap includes a top wall 22 which in the preferred
embodiments is substantially rectangular in plan, but may be of any
other convenient shape. Depending downwardly from the top is an
annular skirt 24 comprising parallel side walls 26 and 28, and
parallel end walls 30 and 32. Each side and end wall of the skirt
includes at its lowermost edge a flange 34 which seats against a
wall or plate surface as will hereinafter become apparent from the
description. Depending downwardly from and formed preferably
integral with the bottom surface of the top wall 22 is a spaced
pair of legs 36 and 38. The legs are parallel to the side walls 26
and 28 and spaced inwardly therefrom. The free end of each leg
includes a respective beveled edge 40 and 42 above which is formed
a respective recess or groove 44 and 46. A respective ledge 48 and
50 is thereby defined at the bottom of the respective groove 44 and
46. For reasons which would become clear, the beveled edges 40 and
42 act as camming surfaces for aiding in insertion of the cap in a
wall or plate, while the grooves 44 and 46 and the ledges 48 and 50
act to secure the cap properly therein. Also depending downwardly
from the bottom surface of the wall 22, preferably parallel to the
end walls, is a pair of actuating tabs 52 and 54 which act, and
should be of length, to entrap the actuating finger member of a
conventional toggle type switch. The cap, and each of its elements,
may be conveniently molded from a high impact polypropylene
material.
In the first embodiment the cap may be used in combination with a
wall structure 56 such as that forming the top of the vacuum
cleaner disclosed in the latter of the aforesaid Patent
Application. This particular wall structure includes a raised
portion 58 to elevate the position of the cap, but it should be
understood that the wall may be planar and that the raised portion
is merely a result of the particular vacuum cleaner design. The
wall 56 in substantially the central portion of the raised portion
58 is formed with an opening 60 which preferably may be of the same
shape as the cap. Secured by conventional means to a surface 62
beneath the opening is a conventional toggle switch generally
illustrated at 64.
A toggle switch is defined herein and used throughout the
specification and claims as a two-position electrical switch with a
short knob or actuating finger member such as 66 that is flipped up
or down, or from side to side, to open or close a circuit. Examples
of such switches are the conventional slide switches illustrated in
FIGS. 3 and 4, and the conventional pivotable switch such as the
wall type mounting switch illustrated in FIGS. 6 and 7. It should
be understood, however, that the actuating member 66 is shiftable
in a single plane, that being the plane of the paper in FIGS. 3 and
6. In the embodiment of FIG. 3 the member 66 is slidable while in
FIG. 6 the member 166 is pivotable from right to left and vice
versa. Conventinal electric wires 68 and 70 lead to and from the
terminals 72 and 74 of the switch. In the horizontal installation
of FIGS. 3 through 5 the member 66 projects upwardly from, but not
necessarily out, of the opening 60.
Forming a border about the opening 60, is an upstanding annular
wall 76 of the same geometrical shape in plan as the skirt 24 of
the cap, and is defined by the walls 78, 80, 82 and 84. Since the
cap preferably is rectangular the walls 80 and 84 are parallel to
each other and the walls 78 and 82 are parallel to each other. The
lateral spacing between the outer surfaces of walls 78 and 82 is
substantially equal to the spacing between the inner surfaces of
the cap walls 26 and 28, while the lateral spacing between the
walls 80 and 84 is less than that between the cap walls 30 and 32
to thus define a clearance space therebetween. Furthermore, the
height of the walls defining the annular wall 76 is equal to or
less than the height of the wall defining the skirt 24 as measured
from the bottom of the flange 34 to the bottom surface of the wall
22. Preferably the edges of the wall forming the opening 60
parallel to the plane of movement of the member 66 includes a
respective lip 86 and 88.
It should now be clear that the cap 24 may be mounted in the floor
structure 56 by inserting the legs 36 and 38 into the opening 60
while the skirt 24 circumscribes the wall 76 and the tabs 52 and 54
entrap the member 66 therebetween. The legs 36 and 38 are squeezed
slightly toward each other as they are inserted until the cams 40
and 42 snap beneath the floor opening. When the flange 34 engages
the floor the lips 86 and 88 may be received within the groove 44
and 46 if the location of the grooves is designed properly. The cap
may then slide left to right and vice versa as shown in FIG. 3
while the ledges 48 and 50 secure the cap vertically in the hole
aided by the lip and groove arrangement. The clearance space
previously defined by the difference in space between the walls 80
and 84 and the walls 30 and 32 is provided for the shifting
movement of the member 66 during actuation from on to off and vice
versa.
In the embodiment of FIGS. 6 and 7, a conventional metal electrical
wall box 90 is disclosed mounted within an opening 92 formed in a
wall 94. For convenience of illustration, the subject matter of
FIGS. 6 and 7 have been turned on heir side. A conventional
pivotable toggle switch 164 is conventionally mounted within the
box 90 and includes an actuating member 166. The cap illustrated in
these Figures is substantially the same as the cap of FIGS. 1
through 5 but for a shortening of the legs, and therefore the same
reference numerals are applied to the cap of the second embodiment.
In this embodiment the cover plate 156 is utilized in place of the
floor of the first embodiment and is secured to a wall 94 and to
the box 90 by conventional means such as screws 96. The plate 156
in all other respects is similar to the floor 56 but for the
absence of a raised portion such as 58. It therefore includes an
opening 160 boarded by an upstanding annular wall 176 defined by
walls 178, 180, 182 and 184 and may include the lips 186 and 188.
The manner of inserting and the manner of operating the cap in the
second embodiment is the same as that illustrated and described in
the first embodiment.
It should thus be clear to one skilled in the art that the annular
walls 76 and 176 provide a moisture barrier about the switches and
that the construction of the cap in combination with the annular
wall prevents moisture from entering the switches.
Numerous alterations of the structure herein disclosed will suggest
themselves to those skilled in the art. However, it is to be
understood that the present disclosure relates to a preferred
embodiment of the invention which is for purposes of illustration
only and not to be construed as a limitation of the invention. All
such modifications which do not depart from the spirit of the
invention are intended to be included within the scope of the
appended claims.
* * * * *