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Патент USA US3032631

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Ma)’ 1, 1962
c. A. BALL, JR
3,032,623
SNAP-ACTION SWITCH
Filed Oct. 19, 1959
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3,032,623
United grates
Patented May 1, 1962
2
1
shoulders 31 and 32 formed in its opposite end, positioned
in the V-notch 29, the blade 21 will be forced to assume
a natural wave such as is shown in FIG. 3. This natural
wave in the blade 21 is so formed that opposite peaks there
of are disposed on opposite sides of the triangularly shaped
projections 24 and 25 in each of the cavities 22 and 23. In
3,932,623
SNAP-ACTIQN SWITCH
Charles A. Ball, Jr., Highland Park, Ill., assignor to
Cherry Electrical Products Corp., Highland Paris, 111.,
a corporation of Illinois
_
Filed Oct. 19, 1959, Ser. No. 847,265
1 Claim. (Cl. 200-67)
order to maintain the ?exing contact blade 21 in - its
natural waved condition I provide a conical coiled return
spring 33. This spring 33 sits in a recess 34 formed in the
base of the cavity 23. The purpose and function of the
My invention relates to a new and useful improvement
in a snap-action switch and more particularly to an elec
trical switch having a contact movable between contact
return spring 33 will be hereinafter made apparent.
Formed in the section 11 is a passage 35 which has
bearing terminals.
open communication with a recess 36 formed in the top
An object of my invention is in the provision in a switch
wall of the cavity 23. An actuator 37 is positioned within
of this character of a movable switch blade that is caused
to be moved with a snap-action between contact bearing 15 the passage 35 and is adapted to be reciprocated there
through. This actuator 37 terminates inwardly of the
terminals.
section 11 into an enlarged head portion 38 which is adapt—
Another object of my invention is in the provision in
ed to sit in the recess 36 formed in the top wall of the
a switch of this character of an arrangement of parts
cavity 23. This enlarged head 38 is provided with a
whereby the contact pressure between the movable con
tact and a ?xed contact is increased prior to the snap 20 nipple 39 which is adapted to engage the ?exing contact
blade 21 on the side opposite the engagement of the spring
actiou movement of a movable switch blade.
A further object of my invention is in the provision in
33 with such blade 21 which is at the highest point of
a switch of this character of a ?exible contact blade which
in its normal assembledposition is caused to assume a
elevation of the wave formed in the blade 21 as seen in.
FIG. 3.
natural wave throughout its longitudinal length, which 25
wave is responsible for the contact pressure between con
tacts and a snap-action movement of the blade when the
natural wave thereof is deformed.
Other objects
The invention
arrangement of
claimed.
The invention
In actuating my improved snap-action switch the actu
ator 37 is depressed so that the enlarged head 38
thereof will force the wave 40 of the ?exing contact blade
will appear hereinafter.
consists in the novel combination and
parts to be hereinafter described and
21 between the V-notch 29 and the projections 24 and
25 to be depressed downwardly‘ against the action of the
spring 33. When the wave 40 has its highest point thereof
indented and depressed below the centerline that extends
between the V-notches 27 and 29 the ?exing contact blade
will be best understood by reference to
21 will cause a reversing of the peaks of the wave such as is
the accompanying drawings showing the preferred form
of construction and in which:
FIG. 1 is an elevational view of my improved snap
action switch;
FIG. 2 is a top plan view of the same;
FIG. 3 is a side elevational View of my switch showing
; the cover removed;
FIG. 4 is a side elevational view similar to FIG. 3 but
' showing the parts thereof in actuated position; and
FIG. 5 is a perspective view of my ?exing contact blade
shown in FIG. 4. By the ?exing of the restricted natural
35 wave of the blade 21 into a reverse wave, a snap-action
movement takes place through that portion 42 of the
blade 21 which lies in the cavity 22 between the V-notch
27 and the apex of the triangular portions 24 and 25.
By such snap-action the contact 43 carried by that portion
42 of the blade 21 is moved into engagement with the con
tact 44 and the terminal 16 and out of engagement with
the contact 45 of the terminal 17. When the moving force
is removed from the actuator 37 the reverse waving of the
blade 21 is accomplished by the return spring 33.
in its natural unmounted condition.
It should be noted that the blade 21 in its normal posi
Referring to FIG. 1 I show a housing 10 for my im 45
tion has su?icient end forces applied to that portion 42 by
proved switch. This housing 10 comprises complementary
reason of its disposition between the V-notch 27 and the
sections 11 and 12 with the sections being mounted to
restriction of the triangular sections 24 and 25 that there
gether in facial relationship by means of rivets 13.
is produced a desired contact pressure between the contact
Adapted to project out of the ends 14 and 15 of each of
the sections 11 and 12 is a pair of spaced apart ?xed 50 43 and the contact 45. When the actuator 37 is depressed
and the wave 40 is forced to assume a deformed condi
contact bearing terminals 16 and 17. Adapted to project
tion the contact pressure between the contacts 43 and 45 is
out of the opposite ends 18 and 19 of the sections 11 and
increased until the snap-action movement takes place as
12 is one end 20 of a ?exing contact blade 21.
herein‘ocfore described.
As each of the sections 11 and 12 are identical, I will
While I have illustrated and described the preferred
describe but one. Referring to FIGS. 3 and 4 I show
form of construction for carrying my invention into effect,
therein a side elevational view of section 11. This section
this is capable of variation and modi?cation without de
11 is provided with cavities 22 and 23. These cavities
22 and 23 are separated by opposing triangularly shaped
‘r
parting from the spirit of the invention. I, therefore, do
not wish to be limited to the precise details of construction
projections 24 and 25 formed as an integral part of the
section 11. The apex of each of these triangular sections 60 set forth, but desire to avail myself of such variations and
modi?cations as come within the scope of the appended
24 and 25 are su?iciently spaced apart to permit the posi
tioning therebetween of a portion of the ?exing contact
claim.
Having thus described my invention, what I claim as new
blade 21. In the end wall 26 of the cavity 22 there is pro
and desire to protect by Letters Patent is:
vided a V~notch 27 extending transversely to the longi
A tease-proof snap-action switch comprising a housing
tudinal length of the section 11. Formed in the end wall 65
having a pair of adjacent cavities, internal projections
28 of the cavity 23 is a like V-notch 29 which also extends
transversely to the longitudinal length of the section 11.
It should be noted that the ?exing contact blade 21 is of
separating said cavities and each having upper and lower
sections formed substantially triangularly in cross-section
with their apexes in abutting relation with respect to each
other, a pair of terminal plates carried by said housing
70
27 and 29 hereinbefore described. Therefore, when the
a length greater than the distance between the V-notches
?exing contact blade 21 is positioned within the housing
10 with its one end 30 seated in the V~notch 27, and the
at one end thereof and having portions extending into the
adjacent cavity and opposite end portions extending ex
3,032,623
terna'lly of the housing, contact heads carried by said ter
minal plates in opposed relation with respect to each other
in said adjacent cavity, said housing providing in opposite
end walls within said cavities aligned V-shaped seats, a
switch blade arranged within the housing and extending
between said apexes and said terminal plates, one end of
d.
to cause the contacts carried thereby to have said alternate
engagement with the contacts of said terminal plates, said
means including a movable actuator carried by the hous
ing and engaging the switch blade at one side thereof, and
a coil spring arranged in said housing in alignment withv
said actuator and engaging the opposite side of said blade
said switch blade reduced to provide oppositely disposed
to resist movement of said actuator to ?ex said switch
shoulders and an elongated terminal adapted to extend
blade in an opposite direction.
exteriorly of the housing in a direction opposite to said
terminal plates, said switch blade between said shoulders 1O
References Cited in the ?le of this patent
and the other end thereof being of a length greater than
UNITED STATES PATENTS
the distance between said seats whereby when said switch
2,395,698
Ti?any -t- ___________ __ Feb. 26, 1946
blade is arranged in said housing with said shoulders and
2,444,529
Puster ___________ __t___ July 6, 1948
said‘ other end thereof in engagement with said seats said
blade will be undulated longitudinally to provide alternate 15 2,545,264
bowed portions one within each of the cavities, said other
end of said switch blade having contacts thereon for
alternate engagement with the contacts of said terminal
2,788,409
Davis ______________ __ Mar. 13, 1951
Grover ______________ __ Apr. 9, 1957
plates, and means for alternately bowing said switch blade
485,955
Italy __ ______ __ ______ __ Oct. 22, 1953
FOREIGN PATENTS
I
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