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Патент USA US2116396

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May 3, 1938.
'
c, H, HILL ET AL
2,116,396
ELECTRIC SWITCH OPERATING APPARATUS
Filed May 22, 1934
2 Sheets-Sheet l
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Figs.
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l nventors:
Charles H. l-HIL.
Arvid E. Armier'som ‘
by w * 5.8M“
Then Attorney
May 3, 1938.
c. H. HILL ET AL
2,116,396
ELECTRIC SWITCH OPERATING APPARATUS
Filed May 22, 1934
2 Sheets-Sheet 2
II'NEYTC'OI'SI
- Charles H. Hill,
Ar'vicl E. Anderson,
Wei]
AttorneQ. '
2,116,396
Patented May 3, 1938
\- ‘UNITED STATES PATENT OFFICE
2,116,396
ELECTRIC SWITCH OPERATING APPARATUS
Charles H. Hill and Arvid E. Anderson, Drexel
Hill, Pa., assignors to General Electric Com
pany, a corporation of New York
Application May‘v 22, 1934, Serial No. ‘726,887
‘
5 Claims.
(01. 200-89)
Our invention relates to electric switches of
that type in which the ‘switch is tripped to open
circuit position in response to an abnormal con
dition in the circuit controlled thereby and is
5 automatically reclosed after being tripped open.
Certain forms of switches of this type hereto
fore constructed have employed a collapsible
mechanism connecting the switch with the oper
ating device therefor by the collapse of which
10 mechanism the switch would be permitted to
open independently of the operating device, the
construction of- the mechanism being such that
it would subsequently reset itself automatically
in readiness for another switch closing operation.
15 The mechanism also was provided with a circuit
controller for reenergizing the operating device
when the switch moved to open circuit position
in response to an abnormal condition. In cer
tain forms of such apparatus the difficulty has
._.u arisen that the operating device has been reener
gized before the resetting operation of the mech
anism was completed with the result that the
switch failed to reclose.
. It is one object of our invention to provide an
79 Li
improved switch operating apparatus which will
avoid this di?iculty.
Another object of our in
vention is the provision of apparatus which will
avoid this di?iculty where the switch is provided
with means for causing a repeated reclosing of
3n the switch at predetermined intervals for a pre
determined number of times should the abnormal
condition persist.
Our invention will‘ be better understood from
the following description taken in connection
35 with the accompanying drawings, and its scope
provided with the usual winding 4 which con
nects with the relay 5 for the operation of the
usual switch tripping means. The operating rod
1 of the switch connects with the lever B which
in turn connects through the toggle 9 with the 5
collapsible mechanism comprising links H) and
l l which links are pivoted together at I2 and are
retained in alignment as shown by Figs. 1 and 3
by means of the latch i3, this latch being pivoted
to link l0 and arranged to be tripped to dis- 10
engage member Ii by the tripping magnet I‘
which is connected to be controlled by relay 5.
Member H at its free end is pivoted to the lever,
16 one end of which comprises a counter-weight
while the other end is pivotally connected with 15
the centrifugal mechanism comprising the fly
balls l1 and connecting linkage l8, the centrifu
gal mechanism being rotated by the electric mo
tor IS.
The lever 8 has an arm carrying the movable 20
contact 2| of an auxiliary switch whose rear con
tacts 22 are in the circuit of the tripping mag
net “ and whose front contacts 23 are in the
circuit of relay 24 to be described later. At 25
we have shown a ?uid reclosing device vwhose 25
internal construction is illustrated by Figs. 4, 5
and 6 and which in the position illustrated by
Fig. 3 is adapted to close a. circuit connected with
the source of supply 26 through the ‘switch 2|,
23 and the winding of relay 24. The latter relay 30
when energized connects the ?xed contacts 21
so as to seal in the winding and it also connects
the ?xed contacts 28 so as to close the circuit
of motor l9 which receives energy from the same
source 26. By means of the hand switch 29 the 35
relay 24 may be manually actuated and through
will be pointed out in the appended claims.
Referring to the drawings Figs. 1, 2 and 3 illus . the hand switch 3|! the tripping magnet l4 may
be manually actuated.
trate the switch and operating mechanism there
As shown in Figs. 4, 5 and 6, the reclosing
for in three different positions. Figs. 4, 5 and 6
25 comprises a closed receptacle having a 40
40_ show the controlling device of the mechanism device
drawn to a larger scale and corresponding in transverse partition therethrough dividing it into
the chambers 32 and 33, the device being partially
position respectively to its positions in the pre
?lled with a suitable conducting liquid such, for
ceding ?gures.
example, as mercury. In chamber 33 is the re
We have chosen-to illustrate‘ our invention as
45 actuated by a motor driven centrifugal device
which device. it will be understood, is of such a
character that it will continue to rotate after the
switch has been closed thereby and the motor
deenergized because of the inertia of the moving
60 parts, until ?nally it comes to rest by reason of
the friction and windage thereof.
Referring to Figs. 1, 2 and 3, the switch is
shown in part only being represented by the ?xed
contacts I and the cooperating movable contact
2. one of the leads I to the fixed contacts being
ceptacle 34 in which are the two conductors 35 45
and 36, the latter being insulated except at its "
upper end whereby the fluid contained in the de
vice will eiectrically connect the two conductors
only after the receptacle 3! has been substan
tially ?lled. The partition across the device is 50
provided with the two tubes 38 and 39 forming
restricted passages through which the ?uid may
pass at a predetermined rate. Thus when the de
vice is in the position shown by Fig. 6 the ?uid
in chamber 32 runs through the pipe 38 into the 55
2
2,116,896
receptacle 34, and when the device is inverted to
the resetting position shown in Fig. 4 the ?uid,
after being dumped from receptacle 34, returns
to chamber 32 through the other tube 39. The
device 25 is disclosed and claimed in the copend
ing application of Arvid E. Anderson, Serial No.
704,653, ?led December 30, 1933, which became
Patent No. 2,055,327 on September 22, 1936.
The device 25 is pivotally mounted on the
10 transverse axis 40 and is provided with the arm
4| by which it is partially rotated on that
axis. The device is arranged to have its angular
position controlled by the position of the switch
operating mechanism. Connection between the
15 arm 4| of device 25 and the link l0 includes the
link 42, the bellcrank 43, and the rod 44. On
one end of bellcrank 43 is pivoted the block 45
which is arranged to slide on rod 44 and engag
ing opposite sides of this block and surround
20 ing the rod 44 are the two coil springs 46 and
41. Spring 46 is retained‘by the head 48 on the
lower end of the rod, and spring 41 is retained by
the block 51 slidably mounted on the rod: The
latter block has the transverse pin 49 therein
25 which engages in a slot in the latching lever 50.
The opposite end of this lever-is arranged to
engage a projection on the link 5| pivoted at
52 whose lower end pivotally connects with the
link 53. Spring 54 serves to resiliently retain
link 5| against the stop 55. Link 53 is slotted
at its opposite end and engaging in this slot
is the pin 56 projecting from lever I6.
The operation of the above-described appara
tus is as follows. Assuming the switch and the
operating mechanism therefor to be in the closed
circuit‘ position illustrated by Fig. 1, should an
abnormal condition such as a short circuit oc
cur on the line controlled by the switch, relay 5
would be operated in response thereto closing
40 the circuit of tripping magnet M to release the
latch l3 whereby the collapsible connection com
prising members lll and | I would move to the po
sition shown by Fig. 2 to allow the switch to drop
to its open circuit position. The switch thus
45 would be tripped free of the centrifugal operat
ing mechanism. Unless the centrifugal appara
tus is rotating at that time the lever I6 by reason
of its weight will thereupon move to the position
shown by Fig. 3, in which position the collapsi
50
ble mechanism) comprising members l0 and II
will reset itself to its extended or non-collapsed
condition'as shown in Fig. 3, the latch l3 drop
ping over the end of link H to the position
shown in that ?gure. The device 25 by reason
of its connection with the link In now is retained
in its upright position as shown'in Fig. 3 in
which position the ?uid contained therein runs
through pipe 38 into the receptacle 34 which in
a predetermined time, that may be several sec
onds, becomes ?lled with the liquid to the point
where the terminals 35 and 36 are ‘electrically’
connected thereby. The circuit thus is closed
through the device 25, switch 2|, 23 and the
winding of relay 24. The energization of this
65 relay closes the sealing circuit thereof and also
closes the circuit of the motor l9 whereupon
the centrifugal mechanism is started rotating.
When this mechanism reaches su?icient speed the
lever I6 is rotated in a counterclockwise direc
70 tion from the position shown in Fig. 3 to that of
Fig. 1, thus moving the switch to closed circuit
position as shown by Fig. 1. Since device 25 now
is in its inverted position, the ?uid no longer
is retained 'by the receptacle 34, hence it no
75 longer connects terminals 35 and 36 and since
switch 2|, 23 is no longer closed, relay 24 is de
energized thereby opening the circuit of motor
|9..
' If the aforementioned abnormal condition on
the line controlled by the switch has been cleared
in the meantime, the switch will remain closed.
However, should the abnormal condition persist
the tripping magnet l4 will again be energized
to cause the switch again to be tripped to the
open circuit position shown in Fig. 2. Because 10
of the inertia of the motor armature and the
?yballs, the centrifugal device will continue to
rotate for sometime after the switch has reached
its closed position, regardless of whether it re
mains closed, and the motor has been deener 15
gized by the release of relay 24 and this con
tinued rotation of the centrifugal device will
maintain lever IS in the position shown by Fig. 2
preventing the resetting of links l0 and II.
While these links are in this collapsed condition, 20
see Fig. 2, the reclosing device 25 is retained
in its horizontal or intermediate position by rea
son of the latch comprising the lever 50 and the
cooperating projection on link 5|. As long as
device 25 remains in this intermediate position
the ?uid therein does not pass the partition in
the device, hence the device remains inactive.
Receptacle 34 is empty since the device 25
reached the inverted position during the clos
ing operation. When the speed of rotation of 30
the centrifugal device decreases to the point
where it is no longer able to retain lever | 6 in
the position shown in Fig. 2 the heavy end of
this lever causes the lever to rotate clockwise to
the position shown by Fig. 3 which allows the
collapsible links l0 and II to reset. By this move
ment of lever I6, the pin 56 therein by engag
ing the end of the slot in link 53 moves link 5|
against spring 54 and releases the latch 56,
whereupon spring 41 causes the device 25 to ro
tate counterclockwise to the position shown by
40
Fig. 3. The ?uid in the chamber 32 of this
device now begins to pass through tube 38 into
receptacle 34 as before and after a predeter
mined time will cause a reenergization of the
motor again to close the switch in the manner
already described. It will thus be seen that as
long as the centrifugal mechanism is rotating
in response to a previous energization at a speed
su?icient to retain lever IS in the position shown 50
by Figs. 1 and 2, the device 25 is retained in an
inoperative position. That is, the circuit of
the motor is not closed thereby until the speed
of the centrifugal mechanism falls to such a low
value that the switch operating apparatus can
reset itself.
Inasmuch as the ?ow of ?uid into chamber 32,
see Fig. 4, is restricted by the size of the opening
of the tube 39, all of the ?uid will nothage time to
return to chamber 32 and after the pparatus
has reclosed a certain number of times within
a predetermined length of time, there will be
an insu?icient amount of ?uid in chamber 32
to ?ll the receptacle 34. Thus if the abnormal
condition on the line persists inde?nitely, the
switch will recluse only a predetermined number
of times after which no further effort will be
made by the switch to close the circuit. Each
time the device 25 is moved to the intermediate
position shown by Figs. 2 and 5 the ?uid which 70
has not yet returned to chamber 32 remains in
chamber 33, the intermediate position thereby '
being an inoperative position in which the device
is held until the speed of the centrifugal appg
15
3
2,116,396
ratus has reduced to such a value that the mech
anism can reset.
We have chosen the particular embodiment
described as illustrative of our invention and it
Ga will be apparent that various modi?cations may
be made without departing from the spirit and
scope of our invention which modi?cations we
aim to cover by the appended claims.
What we claim as new and desire to secure by
3. A reclosing circuit breaker comprising a main
switch, a motor driven centrifugal operating de
vice therefor, a latch controlled collapsible con
nection between said switch and said device, said
connection being constructedv to reset itself in
non-collapsed condition when the speed of the
device decreases to a predetermined minimum, a
pivotally mounted mercury time delay switch for
controlling said motor having an operative posi
10 Letters Patent of the United States is:
tion, an inverted position and an intermediate 10
1. A reclosing circuit breaker comprising a
main switch, a motor driven centrifugal operating
device therefor, a latch controlled collapsible con
nection between said switch and said device, said
15 connection being constructed to reset itself 'in
inoperative position, means for moving said time
non-collapsed condition when the speed of the
device decreases to a predetermined minimum, a
movably mounted time delay switch having an
operative and an inoperative position for con
20 trolling said motor and means operative to hold
said time delay switch in its inoperative position
when said connection is collapsed and to move
the same into its operative position in response
to the resetting of said connection.
2. A reclosing circuit breaker comprising a
26
main switch, a motor driven centrifugal operat
ing device therefor, a latch controlled collapsible
connection between said switch and said device,
said connection being constructed to reset itself
30 in non-collapsed condition when the speed of the
device decreases to a predetermined minimum, a
movably mounted mercury time delay switch for
controlling said motor having an operative and
an inoperative position, and mechanism connect
35 ing said time delay switch with said connection
operative to retain the time delay switch in its
inoperative position when the main switch is open
delay switch to its operative position when the
main switch is open and said connection is reset
and for moving the same to its inverted position
when the main switch is closed and the connection
is reset and means for retaining the device in its
intermediate position while the switch is open and
the connection is collapsed.
4. A reclosing circuit breaker comprising a main
switch, a motor driven centrifugal operating de 20
vice therefor, an auxiliary switch for controlling
said motor, means tending to move said auxiliary
switch to closed circuit position in response to a
tripping open of said main switch, and means
operative to restrain said means if the centrifugal 25
device has a speed greater than a predetermined
value.
5. A reclosing circuit breaker comprising a main
switch, a motor driven centrifugal operating de 30
vice therefor, an auxiliary switch for controlling
said motor, means tending to move said auxiliary
switch to closed circuit position in response to a
tripping open of said main switch, and means
controlled by said centrifugal device for restrain
ing said means until the speed of said device shall
have decreased to a predetermined value.
and said connection is collapsed and to move the
time delay switch to its operative position when
40 the connection subsequently becomes reset.
CHARLES H. HILL.
ARVID E. ANDERSON.
40
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