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Патент USA US2121651

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June 21, 1938.
E. M. CLAYTOR
2,121,651
SWITCH
Filed Nov. 15, 1956
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2,121,651
Patented June 21, 1938
UNITED STATES PATENT OFFICE
2,121,651
SWITCH
Edward M. Claytor, Anderson, Ind, assignor to
General Motors Corporation, Detroit, Mich, a
corporation of Delaware
Application November 13, 1936, Serial No. 110,661
8 Claims. (Cl. 200—81)
A shaft 40 is rotatably supported in the bear
This invention relates to switches, and more
particularly to switches of the rotary type con
trolled by air currents.
'
An object of the invention is to provide a con
5 troller switch of simpli?ed construction and yet
responsive to air currents of varied actuating
forces.
Another object of the present invention is to
provide a controller switch having an air vane
10 and connections with a suitable current consum
ing device or devices, whereby low velocity air
15
29'
25
30
35
current impinging against the vane will be in
suf?cient to change the normal relation of the
switch contacts, but in which a higher velocity
air current will operate to complete the switch
ing functions in response to predetermined con
ditions.
Further objects and advantages of the present
invention will be apparent from the following de
scription, reference being had to the accompany
ing drawing wherein a preferred embodiment of
the present invention is clearly shown.
In the drawing:
Fig. 1 is a sectional view of the air switch of
the instant invention.
Fig. 2 is an end view looking in the direction
of arrow 2 in Fig. 1.
Fig. 3 is a plan view of the switch looking in
the direction of arrow 3 of Fig. 1.
Fig. 4. is a view similar to Fig. 3 but showing
the switch in a closed position.
Fig. 5 is a wiring diagram illustrating an adap
tation of the present invention.
Referring to the drawing 20 designates a sup
porting bracket or plate provided with legs 2|
and 22. The leg 2| is suitably apertured to re
ceive a bolt and nut device 23 for attaching the
bracket to a support 24.
The leg 22 is provided with an opening to re
40 ceive a reduced end portion 25 of a bearing sleeve
26. A shoulder 21 formed by the reduced por
tion_ of the bearing sleeve is adapted to bear
against the underside of the leg 22. The reduced
portion extends through an aperture provided in
45 a plate 30 and plate 30 is held ?rmly upon the
upper face of the leg 22' by forcing a portion of
the bearing over the plate as at 3|, see Fig. 1.
The plate 30 is provided with a recess 33 and
said recess registers with an extruded projection
50 or boss 32 provided by the leg 22, the boss oper
ating to prevent the plate 30 from turning rela
tive to the leg. The plate 30 is also provided
with a plurality of integral ears or lugs 35, 36,
31 and 38 bent at substantially right angles 'to
55 the plane of the plate 30.
ing sleeve 26 and has an opening at one end
thereof through which is forced a contact mem
ber 4| having a head 42 and a shank 43 with
the shank projecting between and beyond the 5
ears 35 and 36. These ears cooperate with the
shank portion 43 of the contact member to limit
the rotary movement of the shaft 40 in either
direction of rotation.
On the other end of the shaft 40, a blade or 10
air ‘vane 50 is secured. This blade is placed in
a path of air current produced by a fan, a por
tion of the fan is shown at 5|, see Fig. 5. When
the fan Si is rotating and the current of air
produced thereby is strong enough to rotate the 15
blade in a counterclockwise rotation, as viewed
in Fig. 3, the blade will rotate the shaft 40 and
shank 43 until the shank end engages the ear
or stop 36 as indicated in Fig. 4.
1' A coil spring 60 is disposed about the shaft 4|] 20
between the plate 30 and the contact 4|.
The
spring has one ehd 6| anchored to the shank por
tion 43 and the other end 62 anchored to the
ear or lug 38. It is to be understood that the
end 62 of the spring 60 may be anchored to any 25
one of the ears 35, 36, 31 and 38. In this way
the tension of the spring may be varied as de
sired. The spring 60 urges the shaft in a clock
wise direction and normally holds the shank 43
of the contact 4| against the stop 35 to hold the 30
controller switch in a circuit open position.
A stationary contact 65 is insulatingly sup
ported upon the leg 22. The contact 65 is pro
vided with a yieldable end 66 and extends into
the path of the contact head 42. The terminal 35
65 is electrically connected to a terminal plate
61. The terminal 65 and the plate 61 are secured
in position upon the leg 22 by metal rivets 68
the lower ends of which are upset, as at 69,
against the plate 61.
40
The use of the controller switch shown in Figs.
1 to 4 inclusive is suitably adapted in a system
of electrical distribution as indicated in Fig. 5.
Referring to the wiring diagram, a battery 10
is grounded at one end, the other end is con— 45
nected by a lead ‘H to a terminal 12 of a current
consuming device 13. A second terminal 14 is
connected by a lead 15 to the terminal plate 61.
. The operation of the above described system is
as follows: When the fan 5| is operated at a 50
speed to produce a su?icient draft of air to rotate
the vane 50 from the position shown in Fig. 3
to that shown in Figs. ‘land 5, the shaft 40 will
be/rotated in a counterclockwise rotation. When
the contact head 42 engages the terminal end 66 55
2
2,121,651
a circuit will be closed. The circuit closed is
as follows: from battery l0, leads 1i terminal 12
through the signalling device 13 terminal 14,
lead 15, terminal plate 51, contact 66, contact 42,
then back to battery through the ground con
nection.
While the embodiment of the present inven
tion as herein disclosed, constitutes a preferred
form, it is to be understood that other forms
might be adopted, all coming within the scope of
the claims which follow.
What is claimed is as follows:
1. A switch comprising in combination; a base
member; a yieldable contact insulatingly sup
15 ported by the base member; a plate secured to
the base member and provided with a plurality of
integral projections; a shaft rotatably supported
by the base member; a movable contact carried
by the shaft and extending between two of the
projections to limit rotary movement of the
shaft; 8. spring around the shaft,‘ said spring hav
ing one end anchored to the movable contact and
the other end anchored to one of the projections
to normally hold the contact out of engagement
with the terminal; and means for rotating the
shaft to move the contact into engagement with
the yieldable contact.
2. A switch comprising in combination; a base
member; a yieldable contact insulatingly sup
ported by the base member; a plate secured to the
base member; a plurality of ears carried by the
plate; a shaft rotatably supported on the base
member; a contact having a head portion adapted
to engage the terminal and a shank extending
through the shaft and projecting between two of
the ears, said shank cooperating with the ears to
limit the rotary movement of the shaft; spring
means operable upon the shaft; for normally
holding the shank of the contact against one of
the stops and the head out of engagement with
the terminal; and means for rotating the shaft.
3. An electric switch comprising in combina
tion; a metal support; a yieldable contact insu
latingly carried by the support; a rotary shaft
journaled on the support; a contact carried by
the shaft; spaced members projecting from the
support and cooperating with one end of the con
tact to limit the movement of the shaft in either
direction of rotation; and a spring urging the
shaft in circuit open position, said spring being
coiled about the shaft and having one end an
chored to the shaft and the other end adapted to
be anchored to either of the projecting members
to vary the tension of the spring.
65
4. An air operated switch comprising in com~
bination; a support; a. terminal insulatingly
mounted on the support; a shaft journaled on the
support; an air vane carried at one end of the
shaft; a circuit closing member carried at the
60 other end of the shaft; a plurality of spaced lugs
projecting from the support and a spring adapted
to have one end anchored to one of the lugs to
vary the tension thereof and the other end to the
contact member to normally hold the contact
65 member out of engagement with the terminal,
bination; a support; a terminal insulatingly
mounted on the support; a shaft journaled on the
support; an air vane carried at one end of the
shaft; a circuit closing member carried at the
other end‘of the shaft; a plate provided with
spaced lugs and secured to the support; a spring
having one end anchored to one of the lugs of
the plate for varying the tension thereof and the
other end to the contact member to normally
hold the contact member out of engagement 10
with the terminal, said contact member being
brought into engagement with the terminal by
the rotation of the shaft when the vane is actu
ated by a draft of air; and means carried by the
support to limit the movement of the circuit clos
ing member in either direction of rotation.
6. A switch comprising in combination, a base
member; a yieldable contact insulatingly sup~
ported by the base member; lugs carried by the
base member; a shaft rotatably supported on the 20
base member; a movable contact carried by the
shaft having a head portion adapted to engage
the yieldable contact and having a shank portion
extending through a pair of lugs to limit the
movement of the shaft in either direction of rota 25
tion; spring means operable upon the shaft for
normally holding the shank of the movable con
tact against one of the lugs so as to hold the
head portion out of engagement with the yield
able contact, said spring being arranged with 30
respect to the lugs so that one end of the spring
may be anchored to either of the lugs to vary the
tension of the spring; and means for rotating the
shaft to move the movable contact into engage
ment with the yieldable contact.
35
7. In a switch mechanism having an oscillat~
able member for actuating a movable contact,
and a spring adapixed to return the oscillatable
member to a rest position, the combination with
the spring, a base provided with a projection 40
thereon, a plate having a notch to receive ‘the
projection to prevent rotation of the plate rela~
tive to the support, said plate having a plurality
of lugs to which one end of the spring may be
anchored whereby the return force of the spring
can be varied, and a sleeve riveted over the plate
to secure the plate on the base whereby the plate
will be maintained in the non-rotative relation,
the sleeve providing a bearing for the oscillating
member.
8. In a switch mechanism having an oscillatable member for actuating a movable contact,
and a spring adapted to return the oscillatable
member to a rest position, the combination with
the spring, a base provided with a projection
thereon, a plate having a notch to receive the
projection to prevent rotation of the plate rela~
tive to the support, said plate having a plurality
of lugs to which one end of the spring may be
anchored whereby the return force of the spring
can be varied, certain of said lugs cooperating
With- the movable contact to limit the movements
of the oscillatable member in either direction of
rotation and a sleeve riveted over the plate to
said contact member ‘being brought into engage ' secure the plate on the base whereby the plate
ment with the terminal by the rotation of the will be maintained in the non-rotative relation,
shaft when the vane is actuated by a draft of the sleeve providing a bearing for the oscillating
air.
member.
70 5. An air operated switch comprising in com
EDWARD M. CLAY'I‘OR.
70
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