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Патент USA US3050609

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Aug- 21, 1962
A. A. BREVICK
3,050,599
SNAP SWITCH
Filed Oct. 10, 1960
Fig. 6.
INVENTOR,
BY
ARNOLD A. BREVIGK
1208 ATTORNEY-5’
United States Patent ()?fice
1
3,050,599
Arnold A. Brevick, Highland Park, 11]., assignor to Cherry
SNAP SWETCH
Electrical Products Corp, Highland Park, Ill., a corpo
ration of Illinois
Filed Oct. 10, 1960, Ser. No. 61,617
6 Claims. (Cl. 2ll0——67)
This invention relates to a new and useful improve
3,®5h,59§
Patented Aug. 21, 1952
2
are of the blade is distorted by the presence of a ?xed con
tact member 21. As the ?xed or stationary contact 21
is located adjacent the member 16 and one end of the
blade 10 it forces the blade 11) to bow upwardly adja
cent the opposite end of the blade 11) and the member
17. The blade 10 will assume the con?guration as shown
in FIG. 2.
The stationary contact 21 is disposed in a horizontal
plane that is slightly higher than the horizontal plane
ment in a snap switch and more particularly to a switch 10 which extends between the V-shaped recesses 18 ‘and 19.
having a switch blade which is adapted to be moved with
a snap—action into contact making and breaking positions.
An object of this invention is to provide in a switch
of this character a switch blade having an inherent char
Such placement of the stationary contact 21 will result
in an inclination of the blade 10 between the recess 18
and a point 22 of contact between an actuator member
23 and the blade 11) which has less slope than the inclina
acteristic resulting from its functioning and operational 15 tion of the blade 11! between the recess 11 and the contact
conditions which assures positive snap movement in one
point 22 of the actuator 23 as seen in FIG. 2.
direction as a result of a forced movement achieved
words when the blade 10 is placed between the members
16 and 17 and is deformed by the stationary contact 21,
through a mechanical actuator and a positive self-restor
ing snap movement in an opposite direction.
A further object of my invention is in the provision
in a switch of this character of a means for maintaining
and increasing switch contact pressures until the blade
moves with a snap-action into its opposite con-tact posi
tion.
_
In other
the blade will have a smaller angle “A” between its end
disposed in the recess 18 and the contact point 22 of the
actuator 23, with respect to a reference line B, than the
resulting angle C formed by the end portion of the switch
blade 11) inserted in recess 19, and the contact point 22
of the actuator 23. It should also be noted that the dis
A still further object of my invention is in the provision 25 tance between the stationary contact 21 and the contact
in a switch blade of this character of a means whereby
point 22 of the actuator 23 is greater than the distance‘
the switch blade may be more economically manufactured
between the recess 1% and the stationary contact 21.
This
and which by its construction assures greater consistency
combined with the small angle A results in having that
between blades of this character.
portion of the blade 11) between the contact 11 thereon
30
Other objects will appear hereinafter.
and the contact point 22 of the actuator 23 the most ?exi
The invention consists in the novel combination and
ble area of the blade 11}. The actuator 23 must be dis
arrangement of parts to be hereinafter described and
posed so as to contact the blade 10 at a point immediately
claimed.
to the left of the apex of the how 27 and to the right
The invention will be best understood by reference to
of the contact 11, a distance equal to the distance between
35
the accompanying drawings showing the preferred form
the contact 21 and the V-shaped recess 18. It should be
of construction, and in which:
noted that if the angle “C” is increased due to a greater
FIG. 1 is a plan View of my improved snap switch blade
compression between the members 16 and 17 the point
as employed in the snap~action switch;
of contact of the ‘actuator 23 with respect to the blade
FIG. 2 is a fragmentary side elevational view of the
40 10 will move to the left of the new apex of the bow. For
switch blade in its mounted inoperative position;
the snap switch heretofore disclosed to perform in its
FIGS. 3 through 6 are fragmentary side elevational
desired manner it is evident that the point of actuation
views of the snap switch blade showing progressive posi
of the actuator 23 will move to the left of the apex of
tions thereof during its movement.
the blade 10 in a direct relationship to the “C” angle of
The present invention relates to a snap switch having
inclination of the blade 10 as it is disposed between the
a switch blade which when positioned in a predetermined 45 members 16 and 17.
relationship within a switch structure will result in a snap
Referring to FIG. 3 it will be noted that as the actuator
movement of the blade through forced motivation by a
23 is depressed the material of the blade 10 is forced
switch actuator and which will result in a self-restoring
downward and in escaping the constant compression placed
movement upon the release of the forced motivation.
thereon by the members 16 and ‘17 the blade 10‘ will bow
50
Heretofore in snap-action switches it has been customary
at the most ?exible area and form a how 24. The bow
to provide a movable contact switch blade with a co
ing of the blade at 24 will result in an opposite bow as
operating tension member which acted upon the switch
at 25 thus maintaining the contact pressure between the
blade in such a manner that movement of the blade was
contact 11 and the stationary contact 21. This contact
obtained through ‘the tension member. In my present
55 pressure is maintained until the how 24 is forced to ex~
device the switch blade when operatively positioned pos
tend below the horizontal plane that extends between the
sesses certain inherent characteristics which permit a snap
V-shaped notches 18 ‘and 19‘ and is represented as line B.
movement thereof without the necessity of a cooperating
When the how 24- passes below line B the how 25 will re
tension member.
verse itself and integrate with the how 24 with a snap,
Referring to FIG. 1 I disclose a substantially flat
60 into the position shown in FIG. 4, where the contact 11
rectangular switch blade 10. A contact 11 is carried by
is shown to be moved into contact with the contact 26.
the blade 10 adjacent one end.
If the bow 2'7 formed in the blade 10‘ between the con
The switch blade 10 is adapted to be mounted between
tact point 22 and the V-notch 19 remains above line B the
two ?xed members 16 and 17. Each of these members
blade 10 will have a tendency to assume its normal posi—
16 and 17 have struck therein V-shaped recesses 18 and 65 tion as shown in FIG. 2 and therefore would return
19 which are adapted to receive opposite ends of the
itself with a snap-action to that position if the actuator
blade 10. The distance between the members 16 ‘and 17
23 is withdrawn out of contact with the blade 10. If,
is less than the longitudinal length of the switch blade 10.
however, the actuator 23 is caused to travel beyond its
As a result of these differences the blade 10 when in—
trip point as seen in FIG. 4, or overtravel, the blade 10
serted between the members 16 and 17 is subject to com 70 will take the position as seen in FIG. 5. In such con
pression and will endeavor to assume the are 20 as de
picted by the dotted line in FIG. 1. However, the normal
dition a how 24', as well as a how 25', will be formed
much in the manner resulting from the initial movement
3,050,599
3
of the actuator 23‘, except at this point the bows 24’ and
25' will be in the same direction and not oppose each
other as was described and is shown in FIG. 3.
When the actuator button is released the spring tendency
of the blade 10 seeks to remove the bows 24’ and 25’ at
the expense of an increased bow 29‘ in the blade 10‘ be
tween the actuator 23‘ at the recess 19. When the bows
24’ and 25’ have returned to the horizontal plane as
A.
oppositely extending V-notches for receiving opposite
ends of said blade, said blade being of a length greater
than the distance between said compression members and
thereby bowed out of a horizontal plane and into con
tact with one of said stationary contacts when mounted
therebetween and in the direction of said actuator, said
indicated by line B, they are no longer held in compres
one of said stationary contacts distorting the bow of said
blade so as to change the angles of inclination of said bow
at opposite ends of said blade between said members and
sion and a new bow 2% which extends from the recess 18
the point of engagement of said actuator, with the ?exible
to the contact point ‘22 of the retreating actuator 23 ap
area of said blade disposed between the point of con
tact of the blade and either of said stationary contacts and
said actuator, said blade movable toward the horizontal
plane between said members by movement of said actuator
pears.
This bow 28 with the bow 29 now forms the. blade 10
into a substantially S-shaped con?guration. As the force
of the actuator 23 decreases to a position where it is no 15 in one direction against a portion thereof so as to cause
longer able to hold the blade 10 in such S-shape the bow
27 will snap back to its original position as seen in FIG. 2
and re-engage the contact 11 with the stationary contact
21.
While the drawings herein and the speci?cation hereto
fore described stated that the blade 10‘ prior to insertion
between the members 16 and 17 was ?at it should also be
noted that the blade may be a round wire or the like and
may be preformed to have a number of convolutions. It
is desirable to have the blade 10‘ have an accentuated ?ex
ible area. As shown, one method to achieve this result
said area to form an oppositely extending bow between
said one of said contacts and said actuator, said oppo
sitely extending bow upon obtaining a predetermined
curvature causing said blade to snap into engagement
with the other of said stationary contacts.
3. A self-restoring snap switch having a movable ac
tuator and an actuated blade, said blade having a ?exi
ble area resulting therein between its opposite ends, a
pair of vertically aligned spaced apart stationary contacts
is to notch-out the blade as at 14 and 15. This area can
disposed on opposite sides of said blade, a pair of spaced
apart compression member-s providing seat means for op
posite ends of said blade, said blade being of a length
be made in other ways such as by slotting the blade 10
or coining the blade in the desired area. The preferred
?at type blade however permits the manufacturer to stamp
greater than the distance between said compression mem
bers and thereby bowed out of a horizontal plane and
into contact with one of said stationary contacts when
the blade from a preheated ?at stock, thus eliminating
mounted therebetween and in the direction of said ac
the need of tempering the same after its formation. This
tuator, said one of said stationary contacts so positioned
modi?cations as come within the scope of the appended
portion thereof so as to cause said area to form an op
with respect to said compression members and said actua
results in a saving of manufacturing costs and presents
tor so as to distort the bow of said blade so as to form
greater material consistency in blades so made.
While I have illustrated and described the preferred 35 a lesser angle of inclination thereof at one end of said
blade, with the ?exible area of said blade disposed be
form of construction for carrying my invention into effect,
tween the point of contact of the blade and either of said
this is capable of variation and modi?cation without
stationary contacts and said actuator, said blade movable
departing from the spirit of the invention. I, therefore, do
toward the horizontal plane between said members by
not wish to be limited to the precise details of construction
set forth, but desire to avail myself of such variations and 40 ‘movement of said actuator in one direction against a
claims.
Having thus described my invention, what I claim as
new and desire to protect by Letters Patent is:
1. A self-restoring snap switch having a movable actu
ator and an actuated blade, said blade having a ?exible
area resulting therein between its opposite ends, a pair
of vertically aligned spaced apart stationary contacts
disposed on opposite sides of said blade, a pair of spaced
apart compression members providing seat means for
opposite ends of said blade, said blade being of a length
greater than the distance between said compression mem
bers and thereby bowed out of a horizontal plane and into
contact with one of said stationary contacts when mounted
therebetween and in the direction of said actuator, said
one of said stationary contacts distorting the bow of said
blade so as to change the angles of inclination of said
bow at opposite ends of said blade between said members
positely extending bow between said one of said contacts
and said actuator, said oppositely extending bow upon
obtaining a predetermined curvature causing said blade
to snap into engagement with the other to said stationary
contacts.
4. A switch having a snap-action blade movable by
an actuator, said blade provided with a preformed ?exi
ble area between its opposite ends, a pair of vertically
aligned spaced apart stationary contacts disposed on op
posite sides of said blade, a pair of spaced ‘apart com
pression members providing horizontally aligned opposite
ly extending V-notches for receiving opposite ends of
said blade, said blade being of a length greater than the
distance between said compression members and thereby
bowed out of a horizontal plane and into contact with
one of said stationary contacts when mounted therebe
tween and in the direction of said actuator, said one of
said stationary contact-s distorting the bow of said blade
and the point of engagement of said actuator, with the
?exible area of said blade disposed between the point of 60 so as to change the angles of inclination of said bow
at opposite ends of said blade between said members
contact of the blade and either of said stationary contacts
and the point of engagement of said actuator, with the
and said actuator, said blade movable toward the hori
?exible area of said blade disposed between the point of
zontal plane between said members by movement of
contact of the blade and either of said stationary contacts
said actuator in one direction against a portion thereof so
and ‘said actuator, said blade movable toward the hori
as to cause said area to form an oppositely extending bow 65
zontal plane between said members by movement of said
between said one of said contacts and said actuator, said
actuator in one direction against a portion thereof so as
oppositely extending bow upon obtaining a predetermined
to cause said area to form an oppositely extending bow
curvature causing said blade to snap into engagement
between said one of said contacts and said actuator, said
with the other of said stationary contacts.
2. A self-restoring switch blade for a snap-action switch
having a movable actuator, said blade provided with a
preformed ?exible area between its opposite ends, a pair
of vertically aligned spaced apart stationary contacts dis
posed on opposite sides of said blade, a pair of spaced
oppositely extending bow upon obtaining a predetermined
curvature causing said blade to snap into engagement ‘with
the other of said stationary contacts.
5. A snap-action switch having a movable actuator
and an actuated blade, a pair of vertically aligned spaced
apart compression members provided horizontally aligned 75 apart stationary contacts disposed on oppoiste sides of
5
3,050,599
said blade, a pair of spaced apart compression members
providing seat means ‘for opposite ends of said blade, said
blade being of a length greater than the distance between
6
plane and into contact with one of said stationary con
tacts when mounted therebetween and in the direction of
said actuator, said one of said stationary contacts distort
ing the bow of said blade so as to change the angles of
inclination of said bow at opposite ends of said blade
between said members and the point of engagement of
said actuator, said blade movable toward the horizontal
plane between said members by movement of said actua
said compression members and thereby bowed out of a
horizontal plane and into contact with one of said sta
tionary contacts when mounted therebetween and in the
direction of said actuator, said one of said stationary
contacts distorting the bow of said blade so as to change
the angles of inclination of said bow at opposite ends
tor in one direction against a portion thereof so as to
of said blade between said members and the point of en 10 form an oppositely extending bow between said one of
gagement of said actuator, said blade movable toward
said contacts and said actuator, said oppositely extend
the horizontal plane between said members by movement
ing bow upon reaching the horizontal plane between said
of said actuator in one direction against a portion there
members will cause said blade to snap into engagement
of so as to form an oppositely extending bow between
with the other of said stationary contacts,
said one of said contacts and said actuator, said oppositely 15
extending bow upon reaching the horizontal plane be
tween said members will cause said blade to snap into
engagement with the other of said stationary contacts.
6. A switch having a snap-action blade movable by an
actuator, a pair of vertically aligned spaced apart sta
tionary contacts disposed on opposite sides of said blade, 20
a pair of spaced apart compression members providing
horizontally aligned oppositely extending V-notches for
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,074,132
2,113,227
2,133,309
2,501,497
receiving opposite ends of said blade, said blade being of
a length ‘greater than the distance between said com
pression members and thereby bowed out of a horizontal 25
Rich ________________ __ Mar. 16,
Bokeeno _____________ __ Apr. 5,
Schmidinger _________ __ Oct. 18,
Clark _______________ __ Mar. 21,
1937
1938
1938
1950
FOREIGN PATENTS
520,482
Great Britain _________ .._ Apr. 25, 1940
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