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Патент USA US2112054

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March 22, 1938.
2,112,054
‘ c. THUMIM
OPERATING MECHANISM
2 Sheets-Sheet l
Filed Nov. 19, 1956
Inventor
I
Car-l
Thurnirn,
b9 HiJ‘ MZZ-‘JWI’L
all
ttor-neg.
March22, 1938.
c. THUMIM
2,112,054
OPERATING MECHANISM
Filed Nov. 19, 1956
2 Sheets-Sheet 2
Inventor“ :
Car“! Thumi'm,
low/Maw
His Attor‘ neg.
2,112,054
, Patented'Mar. 22, 1938 '
UNITED STATES PATENT OFFICE
2,112,054
OPERATING MECHANISM
'Carl Thumim, Lansdowne, Pa., assignor to Gen
eral Electric Company, a corporation of New
York -
Application November-19, 1936,- Serial No. 111,709
6 Claims.
My invention relates to operating mechanisms,
more particularly ‘to those of the solenoid actu
ated type, and has'for its principal object the
provision of an improved operating mechanism
5 of the ‘aforesaid type which is simple, compact
and rugged in construction, emcient, positive and
trip-free in operation and which is adapted to
apply the‘ operating force directlyto a member
to be actuated reciprocally movable in a direc
10 tion generally transverse to the direction of.
movement of the solenoid armature or plunger.
My invention will be more fully set forth in
the following description referring to the accom~
(Cl. 200—.89)
chain linkage in its operative position, a bell
crank 5 pivotally mounted at 6 is provided at
one end as at ‘I with a roller 8.
The bell crank is
also provided with a loop-shaped guard member
9 which serves to keep the chain linkage within 5
the groove de?ned by the roller. The bell crank
5 is also provided at its opposite end as at In
with a roller ll coacting with tripping or re
straining means comprising a latch 12 pivotally
mounted at l3. The latch is provided with an 10
offset arm M for coacting with the conventional
tripping solenoid l5 and is spring biased for re
setting at it in a counterclockwise direction
panying drawings, and the features of novelty v against the stop member ll.
15 which characterize my invention will be pointed
It will be apparent that actuation of the tripout with particularity in the claims annexed to ping solenoid to elevate the tripping plunger l5’
and forming a part of this speci?cation.
causes clockwise rotation of the extension l4 and
Referring to the drawing Fig. 1 is an eleva
movement of the latch 02 beneath the roller ll.
tional view partly in section of a solenoid oper
Manual tripping of the latch is suitably provided
ated mechanism in the operated or “closed” po
by means of a lever l8 independently pivotally
2
sition embodying the present invention; Fig. 2 is I mounted at l3 and coacting with a pin l 9 carried
a similar view showing the mechanism in an
by the extension arm 1
A manually operable
intermediate position during the releasing or link 28 is connected to the lever it for rotating
_tripping operation, and Fig. 3 is a similar view the latch clockwise in the manner above de
showing the mechanism in the “open” and reset scribed.
‘
.positio ..
l
In the position shown by Fig. l the switch
The operating‘ mechanism ,herein described, member is in the operated or closed circuit posi
while generally applicable to reciprocally movable tion and is held in'such position against the bias
devices, has particular application to electric cir— of a compression spring 20. The chain linkage
3 c'uit breakers wherein a switch member is movable
3 is held under tension by the solenoid plunger %
between open and closed circuit positions. In while the solenoid is energized. When the sole
such applications the switch member is generally noid is deenergized a prop member 22 pivotally
. moved to the closed circuit position against an
mounted at 23 is biased as at ‘24 to block and hold
opening biasing“ force, such as a compression the solenoid plunger in its lower or operated posi
35 spring, for example, so that the opening stroke is tion. The prop 22 is adapted to abut at its lower
automatically accomplished simply by release of end a guide pin 25 extending transversely of the
the switch member. In' circuit breaker mecha
plunger within a recess in the central part there
nisms it is also desirable that the device be trip
of and operable within lateral guide plates 25'.
free in operation, that is, free to trip and release‘
The bell crank ii, the pivot 6 of which is offset
40 the ‘switch member during any part of the actu
with respect to the bisector of the angle de?ned
ating or closing stroke. _
by the chain linkage so that the chain tension
Referring more particularly to Fig. 1 there is tends to rotate the bell crank clockwise, is re-'
shown an actuating solenoid generally indicated strainedwith respect to clockwise rotation by the
at l including a reciprocally movable plunger 2 latch l2 as previously described. In‘ this position
which is directly connected through a ?exible the solenoid can be deenergized and the switch
tension member 3, such as a roller chain linkage member ll held indefinitely in the closed circuit
for example, to a reciprocally movable switch
4 constituting the means to be actuated; In the
‘present instance the direction of movement of
position.
15
0
30
3.
40.
45
.
The releasing or circuit opening operation is
initiated by releasing or tripping of the bell
the switch member is substantially at right angles
crank by the latch it, either by the tripping sole- 50
to the direction of movement of the solenoid
hold or manual operation, so that the spring 2l
plunger, so that the chain linkage in applying
tensioning the chain linkage 3 causes clockwise
the actuating force is guided so'as'to de?ne an
rotation of the bell crank to the position shown
angle of approximately 90 degrees.
by Fig. 2. A comparatively sensitive tripping
device can be used if desired since the required
'
For the purpose of guiding and restraining the
2,112,054
2
tripping force is directly related to the crank
lever arm indicated at “a” through which the
resultant reacting force at the chain linkage
tends to produce clockwise rotation of the crank.
Where the lever arm “a” is quite small, the latch
releasing force required is obviously small.
During the releasing movement of the bell
crank a portion thereof at 5’ serves as a cam
member for engaging an extension 26 secured to
10 the prop 22. After predetermined rotation of the
bell crank the member 26 is cammed so as to
move the prop 22 away from the solenoid pin 25.
Accordingly the plunger 2; which is normally
biased, in addition to the bias of spring 2|, by a
'15 spring 21 towards its upper or reset position, is
now free to assume such position.
It will be apparent that release of the bell
crank 5 causes sumcient slack in the chain linkage
_ to permit immediate opening movement of the
20 switch member. In addition, the release of the
solenoid plunger in response to release of the bell
crank causes immediate resetting of the solenoid
so that another reclosing operation is dependent
only upon resetting of the bell crank and latch.
26 To this end the bell crank is provided with a re
setting spring 28 which is tensioned during the
opening operation and which functions imme
diately to reset the bell crank as illustrated by
Figs. 2 and 3 as soon as there is su?icient slack
I
30 in the chain linkage.
In resetting the'roller II, the bell crank rides
over the edge of the latch l2, thereby effecting
resetting of the tripping means. The mecha
nism illustrated by Fig. 3 is therefore in the com
pletely reset position and can be closed by ener
gization of the solenoid causing downward move
ment of the plunger 2 to the position illustrated
by Fig. 1.
During the closing operation the bell crank 5
40 is held in the position shown and the chain link—
age is guided by the roller 8 so that the actuating
force is applied through an angle of 90 degrees
without appreciable friction losses. When the
plunger 2 reaches the lower position shown by
45 Fig. l the prop 22 is snapped by its spring 24
over the pin 25 so as to block return movement
of the plunger except in accordance with a duly
initiated opening operation.
_
A
It will be noted that the mechanism is trip
free in all positions thereof during the actuating
or closing stroke. That is, actuation of the trip
ping mechanism is effective at any time to pro
duce su?icient slack in the chain linkage to
permit reverse or opening movement of the switch
member.
It should be understood that my invention is
not limited to specific details of construction and
arrangement thereof herein illustrated, and that
causing release of said guiding means so that the
resulting slack in said ?exible member permits
reverse movement of said means to be actuated.
2. Operating mechanism comprising actuating
means and means to be actuated, a ?exible tension
member interconnecting the aforesaid means and
adapted to be tensioned by said actuating means
for changing the direction of application of the
actuating force, means including a crank coact
ing at one end with said tension member for guid 10
ing and restraining the same so that said change
in direction is of. the order of 90 degrees, and
tripping means for releasing said crank so that
the resulting slack in said tension member per
mits reverse movement of said means to be actu
ated.
3. Operating mechanism comprising an actuat
ing_ solenoid having a reciprocally operable
plunger, a member to be actuated reciprocally
movable in a direction generally transverse to the
direction of movement of said plunger, a ?exible
tension member interconnecting said plunger and
said member, a pivoted element including a roller
mounted at one end thereof for coacting with said
tension member for guiding and restrainingthe i,
same along a path of changing direction, actua
tion of said solenoid effecting a pull on said ten
sion member to move said reciprocally operable
member in one direction, and tripping means for
releasing said pivoted member so that the result 30
ing slack in said tension member permits reverse
movement of said reciprocally operable member.
4. Operating mechanism comprising an actuat
ing solenoid having. a reciprocally operable
plunger, a member reciprocally movable in a di 35
rection generally transverse to the direction of
movement of said plunger, a chain linkage inter
connecting said member and said plunger, a bell
crank having a roller at one end for guiding and
restraining said chain linkage in tension, the 40
pivot of said bell crank being disposed within the
angle through which said chain linkage is ten
sioned so that the reacting force on said bell
crank tends to rotate the same from its restrain
ing position, and latching means coacting with
the other end 01' said bell crank for releasing the
same so that said chain linkage is slackened and
ineffective to hold said reciprocally operable
member in its operated position.
'
, 5. Operating mechanism of the trip-free type 50
for electric circuit breakers comprising a solenoid
having a reciprocally operable plunger, a switch
member reciprocally operable in a direction
generally transverse to the direction of move
ment of said plunger, a chain linkage intercon 55
necting said plunger and said switch member, a
bell crank having a roller at one end for guiding
and restraining said chain linkage along a path
defining an angle of approximately 90 degrees,
the tension applied by said plunger to said chain 60
changes and modi?cations may occur to one
00 skilled in the art without departing from the ~ linkage in operating said switch member to the
spirit of my invention.
closed circuit position tending to rotate said bell
‘ What I claim as new and desire to secure by
crank to a non-restraining position, a resetting
Letters Patent of the United States is:
spring biasing said bell crank toward said posi
1. Operating mechanism comprising actuating
means and means to be actuated, a continuous
?exible tension member interconnecting the
aforesaid means for changing the direction of
70
application of. the actuating force, said- ?exible
member being under tension when said actuating
tion, a prop member normally restraining said
plunger in its operated position, said bell crank
being adapted to cause release of said prop in
accordance with releasing movement of said bell
crank and tripping means coacting with said bell
crank for restraining the same and said chain
force is applied, means for guiding and restrain
linkage'in an operative position, actuation of said
ing said ?exible member for effecting the afore-' tripping means causing rotation of said bell crank
said change in direction of actuating force, said ,. so that the resulting slack in said chain linkage
guiding and restraining means including av crank
permits circuit opening movement of said switch
having a comparatively small e?'ective lever arm
75 in the operative position, and tripping means
member.
.
16
31511232542
6. Operating mechanism '10:‘ electric switches
comprising an actuating solenoid having a re
ciprocally operable plunger, a switch member
reciprocally movable in a direction approximately
at right angles to the direction of movement of
said plunger, a chain linkage interconnecting said
plunger and switch member, a bell crank having
a guide roller for said chain for restraining said
chain along a path generally coincident with the
10 angle between said directions of movement, the
pivot of said bell crank being within said angle
\
t
3
and onset with mspeet to the bisector of said
angle so that tension applied to said chain by said
plunger tends to rotate said bell crank from its
restraining pwition, and latching means coacting
with said bell crank for holding the same in said
restraining position, actuation oi said latching
means and the resulting slack in said chain link
age permitting reverse movement of said switch
members
'
CARL THUMIM.
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