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Патент USA US2134207

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Oct. 25, 1938.
F, J_ RUSSELL
I
ELECTRIC
2,:134207
SWITCH
Filed June 22, 1936
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Patented Oct. 25, 1938
2,134,207 '
UNITED STATES PATENT OFFICE
2,134,207
ELECTRIC SWITCH
Frank J. Russell, Wauwatosa, Wis., assignor to
Cutler-Hammer, Inc., Milwaukee, Wis., a cor
poration of Delaware
Application June 22, 1936, Serial No. 86,545
' 4 Claims.’ (01. 200-153)
This invention relates to electric‘ switches, and
means comprises a horizontally arranged insu
lating lever l3 pivoted intermediate its ends upon
for use in connecti n with electromagnetic con
a pin l4 carried by a bracket‘ l5 ?xed to plate 3.
tactors and other c trol apparatus.
Lever l3 extends between the upper ends of the
Auxiliary control switches having a stationary‘ insulating blocks 8 of switches l and 2 and as 5
contact and a cooperating movable leaf spring is apparent from Fig. 2 said lever cooperates with
contact which is ?xed to a stationary support are said insulating blocks to prevent'closure of the
commonly employed in electromagnetic contactors contactors l and 2 simultaneously.
more particularly to auxiliary control switches
to establish a maintaining circuit for the con
10 tactor uponclosure thereof.
Each of the contactors l and 2 has an auxiliary
However, in prac
tice it'has .been found that auxiliary control‘
switches of this type are di?icult to adjust and
are also objectionable due to the fact that the
leaf spring contact is likely to break or become
sulating base 6‘. Such switches are of like ‘con
struction and each‘ includes a contact ?nger I‘!
having one end mounted upon a supporting post
provide an improved auxiliary control switch
which overcomes the aforementioned objections.
and carried by said supporting post. Contact post
Another object is to provide a reliable, and e?l
20 cient ‘control switch consisting of a relatively
small number of rugged and inexpensive parts
plate 2! associated therewith and said posts and
control switch i 6 mounted upon its associated in
IS, a stationary contact post I9_ located at the
permanently bent.
opposite end of said contact ?nger, and an operat
The present invention has among its objects to v lng part 20 located in front of said contact ?nger
their associated terminal plates are secured to
base .6 by screws 22. Supporting post i8 is pro
which can be readily manufactured and assem
vided with a square shank 23 having a pin 24 pro
bled.
jecting from the front end thereof, and conta t
'
Various other objects and advantages of the in
25 vention will hereinafter appear.
The accompanying drawing illustrates an em
bodiment of the invention which will now be de
scribed, it being understood that various modi?
cations may be made in the embodiment illus
30 trated without departing from the spirit and
scope of the appended claims.
‘
In the drawing,
Figure 1 is a side elevational view of an elec
tromagnetic reversing switch having auxiliary
C19 Oi control switches embodying the invention asso
ciated therewith;
1, and
?nger I‘! is provided with an opening for receiv
ing said pin and is also provided with a hooked
end portion 25 which engages one of the side faces
of said shank to hold said contact ?nger against
rotation upon said pin. The operating part 20
is provided with legs 26 and 2'l_which are offset
with’respect to each other at a point intermediate.
the ends of contact ?nger IT to provide a shoul
der 28.- The leg 21 of operating member 20 is
provided with an opening for receiving pin 24 and
said leg bears against the front face of contact
?nger l1 and is provided with a hooked end por
tion 29 which overlaps the hooked end portion
Fig. 2 is a sectional view on line 2-—,-2 of Fig.
.
l9 and supporting post I 8 each have a terminal
'
Fig. 3 is‘ a, diagrammatic view illustrating'the
40 control circuits for the switch shown in Fig. 1.
The drawing illustrates a reversing switch in
cluding a pair of 3-pole electromagnetically op
erated contactors | and‘ 2 mounted side by side
upon a supporting plate 3. Each ofsaid contac
tors is provided with an operating magnet 4,
stationary contacts 5 carried by an insulating '
base 6 ?xed to plate 3, and cooperating movable
contact ?ngers 'l yieldingly mounted upon an‘
insulating block 8. The operating magnet of
25 on said contact ?nger to prevent rotation of
said operating member upon pin 24. Contact
?nger l1 and its associated operating part 20 are
held in assembled relation upon supporting post
l8 by a coil spring 30 which surrounds pin 24 and
is held under compression between the. leg 21
of operating member 20 and a washer 3| ?xed to
the end of said pin.
When contactors l and 2. are in open position
lever l3 occupies an intermediate position and
each of the contact ?ngers ll of the auxiliary
control switches I6 is held in engagement with
the front face of shank 23 by its associated spring
each switch includes a magnet winding 9 carried 30 to disengage the same from its associated sta
by a ?eld member Ill ?xed to plate 3 and a ver- ' tionary contact post l9. However, upon closure
tically arranged armature member ll pivotally ofeither of the contactors the operating mem
mounted upon a pin 1 2 carried by said ?eld mem
ber 20 of its associated auxiliary switch is moved
ber. Each of the armature members H has the inwardly by engagement of lever l3 with the leg
insulating block 8 of its associated switch ?xed 26 of said operating member. During initial in
thereto and said armature members are normally ward movement of operating member 20 the rear
held by gravity in a position to disengage contact face of the leg 21 thereof is maintained in en
?ngers ‘I from the stationary contacts 5. The gagement with the front face of contact ?nger I1
vcontactors l and 2 are provided with mechanical and said contact ?nger is'rocked upon the edge
60 interlocking means, and as shown in Fig. 2 such
32 of shank I8 against the action of spring 30 8‘0 ‘
2
2,184,207
into engagement with its cooperating stationary
contact post i9. Upon continued inward move
ment of operating member 20 the leg 21 thereof
is tilted with respect to contact ?nger 11 against
the action of spring 30. The shoulder 28 of said
operating member then bears on said contact ?n
ger at a point intermediate the ends thereof to
hold the same in closed position. Thus each of
the auxiliary control switches is adapted to be
10 closed upon initial closing movement of its as
sociated contactor, and as is apparent tilting of
the operating member 20 with respect to the con
tact ?nger l1 permits full movement of the con
tactor into closed position without subjecting said
15 ?nger to an excessive operating force.
Referring now to Fig. 3, the same diagram
matically illustrates the operatingdwindings of
the contactors i and 2 and also the auxiliary con
trol switches associated with said contactors. A
20 supply circuit for said operating windings is in
?nger with its cooperating stationary contact.
2. In a control switch, in combination, a rigid
contact ?nger, a cooperating stationary contact
located at one end thereof, a stationary support
located at the opposite end of said ?nger and
engaging one side thereof, a member engaging
said ?nger on the side opposite said support, said
?nger and said member being mounted upon said
support to rock with respect thereto, and said 10
member being also capable of rocking movement
on said ?nger, a spring biasing said ?nger out
of engagement with its cooperating stationary
contact and pressing said member against said
?nger to normally hold the same in a given po 15
sition with respect thereto, and an operating ele
ment for moving said ?nger into engagement
with its cooperating stationary contact by pres
sure exerted on said member at a point to cause
said member to rock on said ?nger against the
dicated by lines L1---L2 and the control means
action of said spring as movement of said operat
therefor includes a normally closed push button .
ing element is continued after engagement of
said ?nger with said contact.
3. In a control switch, in combination, a rigid
contact ?nger, a cooperating stationary contact
located at one end thereof, a stationary support
located at the opposite end of said ?nger and
engaging one side thereof, a member engaging
said ?nger on the side opposite said support, said
?nger and said member being mounted upon said
support to rock with respect thereto, and said
33 and a pair of normally open push buttons,“
and 35. Upon depression. of push button 34 the
operating winding of contactor I is connected
across lines L1—L2 through the medium of push
button 33 and upon response of said contactor
push button 34 can be released and an energizing
circuit for the operating winding of said con
tactor is maintained through the medium of its
auxiliary switch I6 and push button 33. Upon
depression of push button 35 the operating wind
ing of contactor 2 is connected across lines L1-—L2
through the medium of push button 33 and upon
response of said contactor push button 35 can be
released and an energizing circuit for said oper
ating winding is maintained through the medium
of its associated auxiliary switch i6 and push
button 33.
Upon closure of either of the revers
ing contactors the maintaining circuit therefor
may be interrupted by depression of push but
ton 33.
In connection with the foregoing it should be
noted that the leg 26 of the operating member
45 20 can be bent inwardly or outwardly with respect
to the leg 2‘! of said member to provide for closure
‘so
element is continued after engagement of said
of the contact ?nger at the proper instant. Also
it should be noted that the above described aux
iliary switch may be modi?ed by arranging the
stationary contact so that the same is engaged
by its associated contact ?nger when the latter
is in normal position.
‘
What I claim as new and desire to secure by
Letters Patent is:
1. In a control switch, in combination, a rigid
55
contact ?nger, a cooperating stationary contact
located at one end thereof, a ?xed support 10
cated at the opposite end of said ?nger and sup
porting said ?nger for rocking motion into and
60 out of engagement with said stationary contact,
a member having a part to lie against said ?nger,
said member being supported by said ?nger for
rocking movement relative thereto, resilient pres
sure means common to said ?nger and said mem
65 berbiasing said ?nger out of ‘engagement with its
cooperating stationary contact and pressing said
member against said ?nger to normally hold the
same in a given position with respect to said ?n
ger, and an operating element for moving said
70 ?nger into engagement with its cooperating sta
tionary contact by pressure exerted on said mem
ber at a point to cause said member to rock on
said ?nger against the action of said resilient
pressure means as movement of said operating
member being also capable of rocking movement
on said ?nger, a pin mounted on said support and
extending through openings in said ?nger and
said member, a spring carried by said pin and
engaging said member to bias said ?nger out of
engagement with its cooperating stationary con
tact and to normally hold said member in a given
position with respect to said ?nger, and an oper
ating element for engaging said member to ei~
fect movement of said ?nger into engagement
with its cooperating stationary contact against
the action of said spring and to also rock said
member on said ?nger against the action of said
spring as movement of said operating element is 45
continued after engagement of said ?nger with
its cooperating stationary contact.
4.-In a control switch, the combination with a
rigid contact ?nger, of a cooperating stationary
contact located at one end thereof, a ?xed sup 50
port located at the opposite-end of said ?nger
and engaging one side thereof, a member engag
ing said ?nger on the side opposite said support,
said ?nger and said member being capable of
rocking movement upon said' support, and said 55
member being also capable of rocking movement
with respect to said ?nger, a pin mounted on said
support and extending through openings in said
?nger and said member, a spring carried by said
pin and engaging said member to bias said ?nger
out of engagement with its cooperating station
ary contact and to normally hold said member
in a given position with respect to said ?nger,
and an operating element for engaging said mem
ber to e?ect movement of said ?nger into en 65
gagement with its cooperating stationary con
tact, said element exerting pressure on said mem
ber at a point intermediate the ends of said ?n
gerto cause rocking movement of said member
with respect to said ?nger as movement of said
operating element is continued after engage 70
ment of said ?nger with its cooperating station
ary contact.
FRANK J. RUSSELL.
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