close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2134633

код для вставки
Oct. 25, 1938.
'
A. c. GAYNOR
ELECTRIC
' 2,134,633
SWITCH
Filed» June 12, .1936
. . u30¢.3,.”3./34.\ 3 .3Vu
...\\
A3.
MrA‘m
.H.”
28
MW134“
03
um
.nJ?3
E3 3 a
333
.r»
.
‘Patented Oct. ‘25, v 1938
2,134,633
UNITED‘ STATES‘ PATENT UFF'ICE
-
‘
2,134,633
4
.
'
"
,
ELECTRIC swr'ron
Arthur C. Gaynor, Stratford, Conn.
Application Jamie, 1936, Serial No. 84,780
16 Claims.- (crate-67)
This invention relates to electric snap switches,
and more particularly aims to provide improve
ments in the construction of snap switches of the
toggle
type.
,
.
'
> ‘
5
It is a general object of this invention to pro
vide an improved electric toggle switch, the con
struction of which is outstandingly simple, so
that manufacturing costs are low, while yet
maintaining an e?iciency of operation of the
. m switch which is extremely high.
In the accomplishment of this object the pres
ent invention contemplates, in such a switch, an
improved toggle construction, improved contact
elements, and also an improved switch mecha
M nism supporting structure.
.
- In a certain‘ type of toggle switch adapted for
plate mountingv the means for‘ mounting the
switch on the plate includes an externally thread
ed sleeve or barrel which carries clincher nuts to
20 grip the plate, the toggle actuating leverof the
switch being carried by the barrel so as to pro
trude from the supporting plate for easy access
and manipulation. In these switches it has been
the custom, prior to this invention, to carry piv
255 otally the manually actuated switch lever on a
I pin which passes through oppositely disposed
apertures in the barrel, said pin being supported
or anchored in the barrel.
'
This has necessitated
the provision of a barrel having substantially a
some; well, has required additional machining
operations on‘the barrel, and further has been
undesirable in that there existed the possibility
of. injury to the threads of the barrel.
These disadvantages have been overcome by
at the present‘ invention, which. provides an im
proved supporting structure for the manually
actuated lever of the switch,‘ which structure does
away with the necessity for a thick walled barrel,
since the pivot pin for the actuatable lever is not
Ml supported in the barrel.
_
According to the‘present improved structure
the switch is provided with a cover plate which .
has outwardly extending apertured lugs or ears
for supporting the pivotal pin, said plate having
45 attached thereto a relatively thin walled mount
ing barrel which houses over the outwardly ex
tending lugs 01’ the plate, and serves now to posi
tion the pin against endwisev movement, and
which barrel also acts as a guide for the switch
b0 lever. By this construction there is avoided the
extra machining operation .which would other
wise be required in anchoring the pivot pin in
the mounting barrel, as well as avoided the‘ possi
bility of marring o! the threads of the vbarrel,
66 which was 7 present with the prior less desirable
supporting means._ Thebarrel thus now func—
tions to mount the switch, to limit endwise move
ment of the pin, and to cover the supporting lugs
or the plate.
'
a
The present invention additionally provides 5
a simple and effective means for attaching the
mounting barrel to the cover plate of the switch
such that the two, are ?rmly held together, and
such that there is positively prevented any possi—
bility of relative turning between these parts.
10
In accordance with the expressed general
object there is also provided asimpli?ed toggle
mechanism for actuating the contact bridging .
members of the switch in response to movement
of the switch handle or lever, and additionally 15
provided improved electrical contact means'co-
‘
acting with the toggle-actuated bridging mem
bers of the switch.
By the provision of the improved electrical
contact means in the switch, it has been possible 20
to simplify and make more compact the housing
or casing of the switch, resulting in a desirable
smallness of size and further economy of manu
facture,
yet
without
sacri?cing
satisfactory '
operation and high emciency ofv the article.
‘25
Other features and advantages will herein
after appear.
.
'
-
In the accompanying drawing:
Figure 1 is a side elevation of an embodiment
of the improved switch of this invention.
30
Fig. 2 is a top view of the switch of Fig. l, with
part of the insulating shield,’ mounting barrel,
and plate cutaway to reveal the improved con
tact bar with its lug.
'
Fig. 3 is a broken longitudinal vertical section 35
taken on the line 3-3 of Fig. 2.‘
Fig. 4 is a transverse vertical section through
the switch.
'
Fig. 5 is a top view of the insulating casing of
_
the switch, with one of the improved contact _40
bars in place.
Fig. 6 is a perspective view of one of the im
proved contact bars of this invention.
Fig. 7 is a top plan view of the cover plate
of the switch.
_
45
Fig. 8 is a side view of the plate of Fig. '7.
Fig. 9 is an elevation of the mounting shell or
barrel of the switch before being attached to the
cover plate.
'
Fig. 10 is atop view of the barrel oi
50
Fig. 11 is a plan view of the tcggl
ate.
Fig. 12 is a side elevati
a modi?ed form
of toggle mechanis
‘7
Fig. 13 is an end elevation of the modi?ed
toggle mechanism of Fig. 11. g
V
55
2
2,134,688
The present improved toggle switch, as shown the underside of the raised central portion of said
,
in Figs. 1, 2, 3, and 4, includes ‘an insulating‘ plate, as at 39, Fig. 4.
The barrel 23 is formed to guide the switch
‘ housing or casing 20, an insulating shield 2|, a
carrying a spherical hand-knob or ball 25. As
lever 24 so that it may be fabricated from a light
stock, and said barrel is provided at its front
with an apertured end closure 40 and a diamet
usual, the mounting barrel 23 is provided with
clamping nuts 23a to engage the margins of an
aperture in a supporting plate or structure
v10 through which the barrel extends. The casing
20, see Figs. 3, 4, and 5, is preferably molded from
not have a large bearing surface on the pin 34.
cover plate 22 and a mounting barrel or shell
23 through which extends an actuating lever 24
suitable insulating material such as Bakelite, and
has a box-like shape having a bottom 26, side
walls 21, and end walls 28, the top of the casing
15 being open. The cover plate'22, Figs. 7 and 8,
closes over the top of the casing 20, there being
interposed between the plate 22 and the casing
the rectangular insulating shield 2 i.
According to the present invention, the cover
20 plate 22 is adapted to act as a mounting for the
actuating lever 24 of the switch. The plate 22,
see Figs. '7 and 8, is stamped from a circular disk
of metal, having ?at or straight edges 29, a cen
tral circular raised portion 36, partially circular
apertures 3| in said raised portion, and lugs or
ears 32 having apertures 33, said lugs being later
bent outwardly to extend, as shown by the
broken lines in Fig. 8, so as to form trunnions
for theisupport of the switch lever. The lugs 32
80 carry a pin 34, Fig. 4, which passes through the
rically disposed slot 4| therein through which ex
tends the lever 24. The slot 3| in the barrel
guides the lever 24, preventing sidewise move
ment or wobble, and therefore said lever need 10
The slot 4| of the barrel is positioned at right
angles to the cuts 31 thereof, so that said slot will
be properly, placed relatively to the lever 24 to
allow for actuating movement of said lever about
the pin 34.
An important feature of the invention is that
the barrel 23 now serves to prevent endwise
movement of the pin 34 in the lugs 32, and there
fore proper positioning of said pin is assured at
all times without further anchorage. It will be
noted that since the pin 34 does not now pass
through the barrel 23 there is obviated the addi
tional machining operations on the barrel which
operations were heretofore necessary.
The switch actuating lever 24, see Figs. 3 and 4,
is stamped out of ?at metallic stock, having a
central aperture to receive the pin 34, and hav
ing an arm or toggle bar pointed at 43, and said
lever has attached to its outermost part a spher 30
ical metallic knob 25.
The toggle and contact mechanism of the
It will be noted that the lever 24 is thus not‘ switch includes two link arms 44, see Figs. 3 and
mounted in the barrel 23, but is mounted for 4, apertured at 45 so as to' be pivotally carried
35 pivotal movement on the cover plate 22 about - by the pin 34, and having their lower extremities 35
‘the pin 34, and said mounting does not require apertured at 46 to carry a metallic spindle 41
apertures 33 in said lugs, and which pin pivotally
supports the lever 24 of the switch.
therefore that the barrel 23 have a heavy wall
as with prior switches, since the barrel now
functions to prevent endwise movement of the
pin.
This mounting is an important feature of
the invention, since alignment of the switch
lever 24 is therefore not dependent on alignment
of the barrel with the casing 22. Also, since as
will be hereinafter disclosed, the whole toggle
45 mechanism of the switch is dependent on proper
alignment of the switch lever, there is provided
by this improved type of support a much more
rigid and workable structure than was heretofore
on which are disposed contact shoes 48 and in
sulating washers 49. The contact shoes 46 are
preferably in the form of metal rings which are
pressed on the ends of the spindle 41 so ‘as to 40
be tightly secured thereto. By this construction
the spindle 41 and shoes 48 carried thereby may
swing freely within the recess of the casing 22,
being pivoted on the pin 34 carried by the cover
22. When the spindle and shoes are in the posi 45
tion shown in Fig. 3 the switch is in open-circuit
position, and when the spindle and shoes are
urged toward the other or left-hand end of the
casing the 'switch is in closed-circuit position.
By the present invention there is provided an
possible, as well as a structure which may be
50 manufactured more economically.
For the purpose of fastening the plate 22 to the ‘ improved stationary contact assembly which is
casing 20, said plate is provided with oppositely
disposed apertures 35 in its rim which align with
apertures 35a in the casing, both sets of aper
tures accommodating pins or rivets 36, see Fig. 3,
which are headed over on the plate.
Each of the
apertures 35a. in the casing is countersunk at its
bottom to receive the head of a pin 36, as shown.
Therefore it will be seen that the switch lever
24 is securely mounted relatively to the casing
20, and therefore there is provided as well a ?rm
mounting for the toggle mechanism of the switch.
The barrel 23, Fig. 9, is provided with oppo
sitely disposed cuts or slots 31 at its rear or bot
tom, and also with a smooth skirt 3B, and said
barrel is so proportioned that the skirt 38 may be
inserted, with a close ?t, within the circular edges
of the apertures 3| of the cover plate, so that the
lugs 32 of said plate extend into the barrel
70 through the slots or cuts 31 thereof. The lugs 32
serve to'position the barrel 23 on the cover 22
against turning relatively thereto, and said bar
rel is ?rmly attached to the'rcover plate by ?ar
ing over the skirt portion 38 of the, barrelagainst
engaged by the shoes 48, and which includes im
proved contact members 50 carried by the cas
ing 22. One such contact member is shown in
Fig. 6, the other contact being similar but the 55
exact reverse of that shown. The contact 50 in
cludes a bar 5| extending at its lower extremity
in an edgewise direction to form a foot 52, said
bar having intermediate its ends a lug 53 integral
therewith and extending at right angles thereto 60
and said lug being apertured at 54 to receive a
wire-binding screw 55.
The stationary contacts 50 are carried by
the casing 22 in specially shaped vertical slots 56,
see Fig. 5, disposed in two corners of the casing.
One edge of each slot 56 has a longitudinal
groove 56a disposed therein while the other edge
is rounded off at 56b to form substantially a lon
gitudinal rib. When a contact member 50 is in- '
serted in a slot 56 the sharp outer corner of said 70
member occupies the groove 56a, and the rib 56b
of the slot engages the inner corner between the
bar 51 and lug 53 of the member. The foot 52
of the bar ?ts into a groove 51 in the bottom of
the casing, and this arrangement thereby pro 75
3
2,134,033 r
vides for an exceptionally ?rm and immovable
desirable low resistance circuit of the switch
positioning of the contact in said casing. When . since the final circuit-closing position of the shoes
the switch is assembled, the stationary contacts
50 are ?rmly held in the casing slots and against
removal therefrom by the insulating shield M,
> which also prevents said contacts from touching
7 the metallic cover plate 22 and being short-cir"-
48 is past the circuit-breaking loints, and is sub
stantially-against the body porlon of the bar 5i.
Also, the movement of the shoes M past the cir
cuit-breaking points of the stationary contacts
will tend to remove any dirt which might be de
posited at these points as a result of arcing.
Referring to Fig. v3, when the spindle W and‘
The arms M and 58 are preferably made of in
10 shoes M are urged in leftward direction from the‘ sulating material so that the contact shoes 48 10
open-circuit. position shown, each of these shoes are electrically insulated from the metal actuat
t8 engages the inner curved portion of a bar 5i ing lever 24! and knob 25 of the switch, thereby
thereby electrically connecting the two bars to
preventing any‘ possibility of inadvertent electri
gether and closing the circuit of the switch. cal shock to a person throwing the switch.
Preferably either the upper or lower apertures
A modi?ed form of toggle mechanism is shown 15
of the link arms M are made slightly oversize in Figs. 12 and 13. A switch actuating lever Ma
'so that the shoes M can ride up on the feet 52 is pivotally mounted on a pin 34a passing through >
an aperture 42a of-thelever, said lever carrying
when theswitch' is closed.
'
It can be readily seen that the stationary at its outer or upper extremity a spherical knob
contacts 50 can be manufactured in large quan ' 25a, and the lower extremity of the lever having
titles and with» extreme, economy, said contacts apoint or knee 133a. The pin 34a carries link arms 20v .
6E, through the lower ends of which pass a metal
each being stamped in one piece from sheet met
al. The assembly including the slots 56 in the - spindle 65 having contact shoes 66 vthereon. Be
casing'and the contacts 501s‘ extremely simple tween the shoes 6b the spindle 65 is engaged by,
and permits said casing to be made compact-and a U-shaped spring-carrying member 61, the neck'
so as to have small dimensions, thereby resulting of which is recessed to partially receive said shaft,
said member carrying a helical compression
in further economy in manufacture.
For the purpose of urging the contact shoes spring 68.
It will be noted thatthe member N is formed
M toward either open or closed-circuit position
30 there is provided a toggle and spring mechanism of one piece, and therefore the arms of said 30
which includes, a pair of spring-carrying arms 58, member do not require additional means to hold I
preferably formed of insulating material, and them in position relatively to each other. Ac
pivotally carried on the spindle 47. The arms cordingly, in this embodiment, there is provided a
plate 69 which ?ts between the arms of the mem
58 have reduced shank portions on which is dis
cuited thereby.
' posed a helical compression spring 59 engaging~
at one and shoulders 600i said arms and at the
other end a slidable plate 6i carried on the arms.
The plate 61, see Fig. 11, is rectangular in shape,
having two parallel slots therein extending in a
40 longitudinal direction thereof, said slots accom
modating the reduced portions 'of the spring
arms 58, and said plate has a central portion 62
intermediate the slots which has a depression at
,1. Li
63 for engagement with the pointed bar it of the
switch-actuating lever.
Referring to Fig. 3, when the switch lever 2t
‘ is moved'to the left the spring 59 will be‘ com
pressed due to movement of the sliding plate 6!
ber 61, said plate engaging at its upper surface
the point 430. of the actuating lever 24a, and en
gaging at its lower surface theend of the spring
68. The plate 69 has the shape of a'?attened
letter M, see Fig. 12, so that the spring 68 and
point 43a are normally centrally positioned there
by. Itis therefore seen that the plate 69 need
not be provided with slots, and thus there has been
eliminated a machining operation on the plate
which was heretofore necessary.
.
The upper extremities of the arms of the mem
ber El preferably are provided with ears ‘Hi to
limit movement of the spring 68 when the toggle
joint is broken in either direction.
The shoes 66 are ?rmly attached to the spindle
on the arms 58, said plate being depressed by the
65 thereby effectively positioning the spring
50 point’ t3 of the lever 2%, until a position is
reached slightly past dead center. . At this point, carrying member Bl- thereon, and the arms of said 50'
the compression of the spring will cause the arms member are prevented from spreading by the
M, spindle M and shoes at to snap quickly to the spring 68, which is positioned at its upper end
1
left to circuit-closing position. Movement of by the plate 69.
Variations and modi?cations may be made
vi CH the switch lever M to the right to open the cir
cuit of the switch results in a snap action similar within the scope of this invention and portions
of the improvements may be used without others.
to that‘ just described.
>
’
~ ‘
I claim:
'
The arrangement of the contact bridging mem1. In an electric switch, a box-like insulating
bers of the switch, including the improved sta
.60 tionary contacts 50 which are held in the slots casing having a bottom, side walls and end walls,
and having a vertical slot in a corner formed by
56‘ of the casing, has proved to be extremely sat
isfatcory and e?lcient. The stationary contacts a side wall and an end wall, said slot separating
are securely held against movement at all times, said walls and having ‘in one of its edges a longi
and throwing of the switch lever 24 results in a tudinal groove and on the other of its edges a
bridging wedge-action between the shoes 48 and longitudinal rib disposed opposite the groove; 65
. 'the vfeet 52 of the bars 5i, thereby serving to and a. contact member ?tting into said slot and
having a pair of biplanar portions engaging the
positively e?ect a low resistanceelectrical con
nection between said bars, and a connection '
which is capable ofhandling relatively high cur
rents.' In addition, when the switch is thrown to
open-circuit position the actual breaking of- the '
edges of the slot and respectively, inter?tting
with the groove and rib of said edges so that said
member is held thereby in the slot against all but
longitudinal movement.
circuit will occur near the tip or toe part of the . v
7
'
-
.
2. In an electric switch, a box-like insulating
shoes 52, and should any arcing occur at these
casing having a bottom, side walls and end walls,
points‘ which might ultimately cause dirt to be and having a pair of vertical slots, one at each
75, deposited thereat, such dirt would not impair the
of the corners formed by the two, side walls and
4
"
.
21,134,633
one of the end-walls, each 01’ said slots separating
the end wall from one oi-the side walls, and
' having in one of its edges a longitudinal groove
and in the other of its edges a longitudinal rib
' disposed opposite the groove; and a pair of con
tact members ?tting one into each of said slots,
each of said members having a pair of biplanar
portions engaging the edges of its supporting slot
and respectively interfltting with thegroove and
rib of said edges so that said members are held
thereby in the slots against all but longitudinal
movement._
3. In an electric switch, a box-like insulating
casing having a bottom, side walls and end walls,
ll and having a vertical slot in a corner formed by
a side wall and an end wall, said slot separating
said walls and having in one of its edges a longi
tudinal groove; and a contact member ?tting
into said slot and having a pair of biplanar pore
tions respectively engaging the edges of the slot,
one of said portions inter?tting with the groove
in the one of said edges so that said member is
held thereby in the slot against all but longi
tudinal movement.
'
4. The invention as de?ned in claim 3, in which
a planar portion of the contact member extends
outward beyond the walls of the casing to form
a connection lug, and in which said lug carries
means for connecting a wire thereto.
5. The invention as de?ned in claim 3, in which
the bottom of the casing has a groove therein
extending in the plane of the inner planar por
tion of the contact member, and in which said
inner portion of the contact member extends
downwardly into said groovein the. casing to
further securely position the member against
movement in the casing.
6. The‘ invention as de?ned in claim 3, in
which the bottom of the casing has a groove
therein extending in the plane of the inner planar
portion or the contact member'and in which said
inner planar portion of the contact member at
its bottom‘extremity extends edgewisely thereof
in the groove of the casing to further securely
46 position the member against movement in the
casing,
.
7. The invention as de?ned in claim 3, in
which the bottom of the casing has a groove
.therein extending in the plane or the inner planar
portion of the contact member and in which said
inner planar portion of the contact member at
its bottom extremity extends edgewisely thereof
bridging member with a snap action to a posi
tion of rest either against the contact members
or away from the contact members.
_
9. In an electric switch, a toggle mechanism,
including a pin; an actuating lever pivotally car- 5
ried by the pin, said lever having a pointed arm
adapted to serve as a toggle bar; a pair of link
members pivotally carried by the pin; a spindle
carried by the free extremities of the link mem
bers; a U-shaped‘toggle bar, the base of which 10
~engages the said spindle, the arms of the U-bar
being disposed one on each side of the pointed
arm of the actuating lever; a spring carried by
the arms of the U-bar; and a solid plate disposed
between the arms vof the U-bar and engaging both 16
the pointed arm of the actuating lever and the
end of the said spring to transmit force from the
spring to the lever arm.
,
_
10. The invention as de?ned in claim~ 9, in
which the plate is shaped so that its one side
positions the spring centrally thereof, and the
other side positions the pointed arm centrally
thereof.
11.,The invention as de?ned in claim 9, in
which the plate is in the shape of a ?attened
letter M so that its one side positions the spring
centrally thereof and the'other side positions the
pointed arm centrally thereof.
_
12. In an electric switch, an actuating struc
ture including a switch cover plate having a pair
of apertured lugs extending outwardly of the
plate; a pin carried by the lugs of the ‘plate in
the apertures thereof; an actuating lever pivotally _
carried by the pin; and a shell carried by the
plate for mounting the latter on a supporting
plate, the inner walls of the shell engaging the
ends of the pin to restrain endwise movement of
the latter, and said shell having a pair of slots
through which the lugs extend, to prevent turn
ing of the shell relatively to the plate.
13. In an electric switch, an actuating struc
ture including a switch cover plate having an
aperture therein, and having a pair of apertured
lugs extending outwardly of the plate,- said lugs . '
being disposed on opposite edges of the aperture;
a pin carried by the lugs or the plate in the
apertures thereof; an actuating lever pivotally
carried by the pin and passing through the
aperture in the plate; and means carried in the
aperture of the plate for mounting the latter
on a supporting plate, including means for preA
venting endwise movement of the pin in the lugs.
which the remaining planar portion of the con
tact member is at right angles to the inner planar
14. The invention as de?ned in claim 13, in
which themeans carried in the aperture of the
plate includes a threaded barrel having a shoul
der and a ?ared-over end engaging the edges of
portion, and has lateral engagement with the
the aperture‘ of the plate, said barrel enclosing
casing to counteract edgewise pressure on said
the lugs 01 said plate.
in the groove of the casing so as to present up
wardly a curved, wedging contact surface and in
curved wedging contact surface.
'
~
15. The invention as de?ned in claim 13, in
8. In an electric toggle switch, a box-like in- ' which the means carried in the aperture'of the
sulating casing having a bottom, side walls and plate includes a threaded barrel having a shoulend walls, and having a pair oi.’ vertical slots, one der and a ?ared-over ‘end engaging the edges
at each or‘ the corners formed by the two side» of the aperture of the plate, said barrel enclosing ,
walls and one of the end walls,‘ each or said the lugs of said plate, and in which the portion
slots separating the end wall from one of the of the plate around the aperture therein is raised
side walls, and having in one of its edges a longi
to form an internal ?ange which is held between
tudinal groove; a pair of contact members ?t
the shoulder and ?ared-over end of the barrel.’
16. In an electric toggle switch, the combina-'
ting one into each or said slots, each. of said
tion of a box-like insulating casing having a bot
members having a pair or biplanar portions re
70
side walls and end walls, and having a
10 spectively engaging the edges of its supporting tom,
ormed
slot, and one‘ or said pair inter?tting with the of vertical slots, one at each of the corn
e ‘end walls
groove of said edge; a contact bridging member bythe two side walls and one
each or said slots sep
ng a side wall irom
adapted to bridge the pair of contacts to elec
or contact members ?tting
trlcally connect these together; and spring-urged. the end wall; a
lever actuated toggle means for moving the one into each of said slots, each or said members ./ '
2,134,038
having a contact bar disposed within the casing
spring-urged’ toggle joint between ‘the contact
and 1 a connection lug extending through the
slot and out of the casing; a cover plate fastened
bridging member and the switch lever whereby
movement of the lever in one direction will cause
to the insulating casing, said plate having an the contact bridging‘member to snap to a posi
aperture'therein and having a pair of apertured tion of rest engaging the contacts of the casing
lugs extending outwardly of the plate,‘ said lugs ' to electrically connect these, and'movement of
being disposed on opposite sides of the aper
the lever in the other direction will cause the
ture; a pin carried by the lugs in the apertures
thereof; an actuating lever pivotally carried by
the pin and passing through the aperture in the
contact bridging member to snap to a position of
rest away from the contacts or the casing so as to
open-circuit said contacts; and means carried in 10
plate; a contact bridging member adapted to
electrically connect the contact bars within the
casing; a pair of link members pivotally carried
the aperture‘of the plate for mounting the switch
by the pin, said members carrying at their other
of the plate.
15 extremities the contact bridging member;
a
on a supporting plate, including means for pre
venting endwise movement of the pin in the lugs
r -
'
'
ARTHUR C. GAYNOR.
Документ
Категория
Без категории
Просмотров
0
Размер файла
832 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа