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Патент USA US3073942

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Jan. 15, 1963
3,073,929
R. HAUSER
CIRCUIT BREAKER WITH SPRING CLOSING MECHANISM
Filed Oct. 9, 1959
4 Sheets-Sheet 1
27
65
23
£5211
I92
202
206
Jan.‘ 15, 1963
R. HAUSER
3,073,929
CIRCUIT BREAKER WITH SPRING CLOSING MECHANISM
Filed Oct. 9, 1959
4 Sheets-Sheet 2
I11
INVENTOR
WITNESSES‘
?/{$.<5M%
Richard Houser.
_
'
ATTORNEY
vJan. 15, 1963
3,073,929
R. HAUSER
CIRCUIT BREAKER WITH SPRING CLOSING MECHANISM
Filed Oct. 9, 1959
4 Sheets-Sheet 3
/
F
/ ///// /////////////
/
Jan. 15, 1963
R. HAUSER
3,073,929
CIRCUIT BREAKER WITH SPRING CLOSING MECHANISM
Filed Oct. 9, 1959
4 Sheets-Sheet 4
United States’
3,073,929
atent
Patented Jan. 15, 1963
1
2
3,073,929
spring closing mechanism when the closing spring is in
CIRCUIT BREAKER WlTI-I SPRHNG CLOSING
MECHANISM
Richard Hauser, Forest Hills, Pa., assignor t0 Westing
house Electric Corporation, East Pittsburgh, Pa., a cor
poration of Pennsylvania
Fiied Oct. 9, 1959, Ser. No. 845,360
17 Claims. (0. 200—1d6)
a compressed and latched condition;
FIG. 5 is a sectional view taken on line V—V of FIG.
2, but showing the spring closing mechanism in a re
leased, open circuit position;
FIG. 6 is an enlarged sectional view of part of the
operating handle; and
FIG. 7 is ‘a view taken along ‘lines VII-——VII of FIG. 6.
Referring to FIG. 1 of the drawings, the circuit
ticularly to a spring closing mechanism for circuit 10 breaker is of the multipole type, each pole unit including
breakers.
a separable contact structure, indicated generally at 11,
This invention relates to circuit breakers and more par
This invention is an improvement over the invention
and an overcurrent trip device indicated generally at 13.
disclosed in the patent application of Gayne D. Gamel
Since the poles are similar, only the center pole of the
et al., Serial No. 822,900, ?led June 25, 1959, and as
circuit breaker is shown and described. The contact
signed to the assignee of the instant application.
structure and the trip device for each pole are mounted
It is an object of this invention to provide a circuit
on separate insulating bases 15 which are rigidly secured
breaker embodying a closing spring that can be latched
to a metal panel 17. The bases 15 of the several pole
in a compressed condition and later released to close the
units are secured to the panel 17 by means of screws 19.
circuit breaker contacts.
The contact structure 11 comprises stationary main
Another object is to provide a circuit breaker embody 20 contacts 23, a stationary intermediate contact 24 and a
ing a closing spring that can be compressed by opera
stationary arcing contact 25, all supported on the inner
tion of a handle, latched, and later released by operation
end of a terminal conductor 27 which extends through
of the handle to close the circuit breaker contacts.
suitable clearance openings in the base 15 and panel 17.
Another object is to provide locking means to prevent
Cooperating with the stationary main, intermediate and
closing of the circuit breaker by operation of the handle. 25 arcing contacts 23, 24 and 25, respectively, are movable
A further object is to provide a circuit breaker em
main contacts 29, a movable intermediate contact 30 and
bodying a closing spring that can be latched in a com
a movable arcing contact 31. The stationary main con
pressed condition and released from a remote position to
tacts 23 are pivotally supported and are biased into en
close the circuit breaker contacts.
gagement with the movable main contacts in the closed
A still further object is to provide a circuit breaker
position of the breaker. The stationary arcing contact is
having a latchable spring closing mechanism and a trip
mounted for limited movement in a well known manner
free operating mechanism wherein the weight of the
spring closing mechanism assists in resetting the trip
and is biased into engagement with the moving arcing
_ contact in the closed position.
The movable main con
tacts 29, the movable intermediate contact 30 and the
Still another object of the invention is to provide a self
movable arcing contact 31 are supported on a movable
latching energy storing mechanism for closing a circuit
switch member 35 pivotally mounted by means of a
breaker that may ‘be released either by means of the
pivot pin 37 on a bracket 39. The bracket 39 is secured
same handle which is utilized to energize the mechanism
by means of two screws 41, only one being shown in
or by means of a remotely controlled device.
FIG. 1, to the inner end of a lower terminal member 43.
Other objects of the invention will be explained fully 40 Spring-biased contact members 45 provide a wiping con
hereinafter or will be apparent to those skilled in the
tact with the movable switch member 35 adjacent the
free operating mechanism during an opening operation.
art.
pivoted end thereof. A spring 47 which is compressed
In accordance with one embodiment of this invention,
a circuit breaker is provided with a trip-free operating
linkage in thrust transmitting position to move the mov
able contact structure. A closing spring is provided
switch member 35 biases the latter in opening direction.
which, when released after being compressed, transmits
its expanding force to the operating linkage in order to
rapidly and forcefully close the circuit breaker contacts.
between a spring seat 49 on the base 15 and the movable
The movable contact structure is normally maintained
in the closed position by an operating mechanism, indi
‘cated generally at 61 (FIG. 1), mounted in a U-shaped
frame comprising spaced side members 65 and connecting
cross members 67, and is supported on a platform 69,
which forms a cross member of a main bracket compris
The’ closing spring can be latched in a compressed condi
tion, and later released in either one of two ways. The
spring can be released by applying a pushing force to the
ing a pair of spaced side members ‘71 (only one of which
tion of the circuit breaker.
For a better understanding of the nature and objects
of the invention, reference may be had to the following
detailed description, taken in conjunction with the ac 60
73 pivotally mounted on a pivot pin 75 supported in the
side members 65 of the frame. The lever '73 comprises
a pair of spaced members joined by a cross member 77
is shown) joined at their outer ends by the platform 69.
operating handle, or by operation of an electromagnet
The platform extends across the width of the breaker and
from a remote position. The weight of the closing spring
the side members 71 are rigidlysecured to the panel 17
also assists in resetting the trip-free operating linkage into 55 on the outsides of the two outer pole units.
a thrust transmitting position during an opening opera
The operating mechanism includes an operating lever
companying drawings, in which:
FIGURE 1 is a side elevational view, partly in section,
of a circuit breaker, in ‘a closed position, embodying the
principle features of the invention;
and between them support a rod 79 which extends across
all of the poles of the ‘breaker. The rod '79 is operatively
connected to the movable switch member 35 by means
of an insulating connecting member 81 and pivot pin 82
in the switch member. There is a connecting member 81
FIG. 2 is an enlarged sectional view of the operating 65 for each pole of the breaker connecting the rod 79 to
and spring closing mechanisms when the circuit breaker
the moving contact structure for each pole unit so that
is in the open circuit position, and showing the closing
upon operation of the rod 79, the movable contact struc
spring in a compressed and latched condition;
tures for all three poles move in unison.
FIG. 3 is a sectional view taken on line III-III of
An operating linkage comprising toggle links 83, 85
70 and 87 is provided to hold the lever 73 and consequently
FIG. 4 is an enlarged side elevational view of the
the movable contacts in the closed position and to oper~
FIG. 2;
3,073,929
3
4
ate the movable contacts to open and closed positions.
Each of these links has two identical legs integral with a
member 131 against the bias of the spring 133 to a non
supporting position, thereby freeing the closing toggle 85,
8'7. The closing toggle thereupon collapses downwardly
cross portion. The toggle link 83 is pivotally connected
to the lever 73 by a pivot pin 89 and the toggle link 85
is connected by a knee pivot pin 91 to the toggle link 83
and by a knee pivot pin 93 to the toggle link 87. The
under the weight of the toggle linkages 83, 85 and 85,
37, and the weight of a spring closing mechanism (to'be
pivot pins 89, 93 and the closing toggle 85, 87 is normally
energization of the tripping electromagnet 13 rotating
described later), and during its collapse resets and re
toggle link 87 is pivotally mounted on a ?xed pivot 97 in
latches the tripping toggle 83, 85.
the frame members 65.
The linkages 83, 85 and 85, 37 are trip free. During
The linkage 83, 85, 87 comprises two toggles one of
an opening operation, the contacts cannot be closed until
which 83, 85 functions as a tripping toggle and the other 10 after the closing toggle collapses resetting the linkages into
85, 87 as a closing toggle. The tripping toggle is nor
a thrust transmitting position for a closing operation.
mally slightly underset above a line drawn through the
The opening operation, as described, was initiated by
slightly underset below a line drawn through the pivots
the latch member 117 counterclockwise. The opening
91, 97.
'
15 operation can also be initiated manually by a trip lever
The tripping toggle 83, 85 is normally biased in a direc
(not shown) that also rotates the latch member 117.
tion to cause its collapse by the springs 47 which bias the
A spring closing mechanism, indicated generally at 137,
moving contact structure for the several poles of the
is provided for manual closing of the circuit breaker.
breaker in opening direction and bias the connecting mem
The spring closing mechanism 137 is partially enclosed
|hers 81 toward the left. The tripping toggle 83, 85 is
within a U-shaped housing 139 which is welded or other
normally prevented from collapsing by means of a main
wise attached 'to the underside of the platform 69. This
latch member 99 pivoted on a pin 100 and connected by
housing has two vertically elongated openings 141 and 143
a link 1111 to the knee pin 91 of the tripping toggle, the
on each side which receive cross bolts 145 and 147 that
link 101 being connected to the latch member 99 by a
move vertically in these openings. The cross bolt 145 ex
pivot pin 103.
' 25 tends through openings in the legs of a U-shaped top
The main latch 99 is held in latching position by an
spring support 149 (FIG. 5) which spring support is en
intermediate latch lever 105 pivoted on a pin 197 sup
closed within the housing 139. The cross bolt 147 ex
ported in the frame members 65. The latch lever 105
tends through openings in the legs of a U-shaped bottom
carries a latch roller 111 which normally engages the main
spring support ‘151 which is also enclosed within the
latch 99 to releasably hold the latter in holding position. 30 housing 139. The cross bolts 145 and 147 prevent hori
The latch lever 105 at its lower end carries a latch portion
zontal rotational movement of the top and bottom spring
113 which normally engages a latch roller 115 on a latch
supports. A closing compression spring 153 is disposed
member 117 pivoted on a pin 119 in the frame members
'65. The latch lever 105 and the member 117 are biased,
between the top and the bottom spring supports 1419 and
151. Two guide bolts 155 and 163 (FIG. 5) extend
.by spring means (not shown), to their latching positions.
Rigidly mounted on the right hand end of the channel
shaped member 117 is a trip bar 123 which extends across
all of the poles of the breaker and has secured thereto
an insulating bracket 125 for each pole of the breaker.
through openings in the bottom and top spring supports.
They serve. to keep the spring 153 in place; to prevent
vertical wobbling movement of the bottom and the top
‘spring supports; and to preset the amount of vertical
rectilinear movement of the spring supports.
Each of the brackets 125 has a headed screw 127 adjust 40
The guide‘ bolt 155 is connected to the bottom spring
ably mounted therein for cooperating with the trip device
support 151 by nuts 157 and 159 which are fastened
13 for the corresponding pole unit.
to the guide bolt on each side of the bottom spring sup
As long as the main latch 99 is held in latching position
port. A stop nut 161 is fastened to the guide bolt 155 on
by the latching mechanism just described, the tripping
the upper side of the top spring support 149. The guide
toggle 83, 85 will, through the link 101, be held in the
bolt 163 is connected to the top spring support 149 by nuts
position shown in which the breaker contacts are held
in the closed position. The closing toggle 85, 87 is nor
mally prevented from collapsing by a shouldered support
165 and 167 which are fastened to the guide bolt on each
side of the top spring support. A stop nut 169 is fastened
tothe guide bolt 163 on the lower side of the bottom
member 131 pivoted on the pin 107 and biased by a spring
spring support 151. The guide bolt 155 moves vertically
133 into supporting engagement with the knee pin 93 of 50 with the bottom spring support, and the guide bolt 163
the closing toggle.
'
Referring to FIG. 1, the circuit breaker is in the closed
and latched position with the support member 131 sup
porting the closing toggle 85, 87 in its extended thrust
transmitting position. The circuit breaker is automatically
tripped open by operation of a tripping electromagnet
moves vertically with the top spring support.
,
. A toggle link 171 is pivotally connected to the vertically
‘movable cross bolt 145,, and a toggle link 173 is con‘
nected to across bolt 175 which is rotatably supported in
openings in the sides of the U-sha'ped housing 139. The
toggle link 173 is also pivotally connected to the lower
end of a vertically movable thrust rod 177 by a pivot pin
indicated generally at 13. The tripping electromagnet 13
may be of any suitable type, and it is arranged to trip
179. The thrust rod '177_has an opening 92 in its upper
the breaker after a time delay and also instantaneously
‘end for receiving the pivot pin‘ 93. As shown in dotted
inresponse to overload currents of predetermined values. 60 lines in FIG. 2, and for a reason which will be described
Upon the occurrence of an overload current, the trip
later, the thrust rod opening 92 is slightly larger than
ping electromagnet produces an upward thrust of a rod
is necessary to allow passage of the pivot pin 93. The
135 which strikes the screw 127 of the latch member 117;
toggle links 171 and 173 are pivotally connected by a
This moves the member 117 counterclockwise disengag
pivot pin 181. As shown in FIG. 5, the toggle links 171
ing the latch roller 115 from the latch portion 113 of 65 and 173 are each formed with two legs and a connecting
the latch lever 195. The, latching engagement of the main
portion. A connecting portion 172, of the link ‘173 acts as
latch 99 with the latch roller 111 is of the slip-off type,
a stop, engaging the thrust rod-177 to limit counterclock
and as soon as the latch lever 105 is released, it is moved
wise rotation (as viewed in FIG. ,2) of the link 173.
7 to unlatching positions by. the upward force applied to
A lift link 183 is provided for lifting the bottom spring
the main latch 99 through the link 191. The tripping
‘support 151. The lift link 1% is a ?at member that passes
toggle 83, 85 immediately collapses upwardly permitting
counterclockwise movement of the operating lever 73
and opening movement of the movable cont-act structure.
through an opening (not shown) in the top spring support
149, and has anangle shaped lower portion with a ?at
leg 184i- projeoting through an opening (not shown‘) in
During the collapse of the tripping toggle 33, $5, a portion
the bottom spring support 151. The cross bolt 14'] passes
of the toggle link 55 engages and actuates the support
75 through an opening in the projecting ?at leg 154 of lift
3,073,929
5
link 183. Upward movement of the lift link 1833, there
fore, lifts the bottom spring support 151.
Referring to FIG. 6, a handle 185, having a horizontal
tubular portion 186, is provided for operating the spring
‘closing mechanism. The handle is removably mounted on
6
In order to close the breaker, the handle 185 is pushed
in toward the circuit breaker mechanism. This force
compresses the spring 193 and then the force is trans—
mitted to an end 217 of the shaft 187. A continued
pushing force on the handle 185 moves the horizontal
an operating shaft 187 by a latch 189 mounted on a pivot
shaft 187, plate 283 and projection 289 to the right, as
pin 1% which is mounted at opposite ends in the handle
viewed in FIGS. 1 and 2, against the bias of the spring
horizontal tube 186. The latch 189 is biased to latching
213. During this movement, the lift link 183 pivots
position by a spring 191. The handle has an‘ opening for
about the cross bolt 147, and moves through an opening
receiving a spring 193 and the outer end of the operating 10 (not shown) in the top spring support 149. As the pro
shaft 187. The spring 193 is a conical nesting type spring.
jection 209 moves to the right, the tapered surface 211
There are two slots 195 (FIG. 1) in the handle horizontal
engages a tapered surface 219 on the thrust rod 177 and
tube 186 for receiving the ends of a pin 197 which extends
moves the thrust rod 177 vertically upwards. As the
through the operating shaft 187. These slots are posi
thrust rod 177 is raised, it rotates the toggle link 173
tioned to engage the pin 197 when the handle 185 is moved
clockwise, as viewed in FIG. 2, about its pivot 175. This
to a two o’clock position and pressed in against the bias
moves the toggle 171, 173 off of dead-center permitting
of the spring 193, so that clockwise rotation of the handle
it to collapse and allowing upward movement of the top
185 will cause clockwise rotation of the operating
spring support 149 under the expanding force of the
shaft 187.
I
The operating shaft 187 is rotatably mounted in a
sleeve 199 (FIGS. 1 and 2) which is attached to the inside
base of the housing 65 by a bracket 2131. A plate 283 is
secured to the inner end of the operating shaft 187. The
plate 2113 is pivotally connected to the upper end of the
lift link 183 by a pivot pin 285 (FIGS. 3 and 5).
Referring to FIG. 5, the spring closing mechanism is
shown in a released, open circuit position.
closing spring 153. As the top spring support 149 is
forced up by the spring 153, it rapidly collapses the tog
gle 171, 173, and forces the thrust rod 177 upwards
(FIG. 1).
'
As shown in FIG. 2, the closing toggle 85, 87 is col
lapsed and the tripping toggle 83, 85 is held in thrust
transmitting position. Therefore, as the thrust rod 177
is forced upwardly it forces the pivot pin 93 upwards and
In order to
straightens the closing toggle 85, 87 moving the'operat
compress the closing spring 153, the handle 185 (FIGS.
ing lever 73 clockwise to close the breaker, FIG. 1. The
operator then releases the handle 185, and the springs
213 and 193 move the handle back to its normal position.
As seen in dotted lines in FIG. 2, the opening 92 in
the upper end of the thrust rod 177, is slightly larger
than is necessary to allow passage of the pivot pin 93.
The opening 92 is of such size that the thrust rod will
1, 2 and 6) is moved counterclockwise to a two o’clock
position and pressed in against the bias of the spring 193
until the slots 195 engage the pin 197. The handle is
then rotated clockwise rotating the operating shaft 187
and the plate 283 in a clockwise direction. As the plate
213-3 rotates, it lifts the lift link 183 and the bottom spring
support 151. Upward movement of the top spring sup
port 149 is prevented because the toggle links 171 and
173 are on dead-center.
The upward movement of the
lift link 1825, therefore, compresses the spring 153
between the bottom spring support 151 and top spring
support 149.
Means are provided to latch the closing spring in a
compressed condition. Clockwise rotation of the plate
is stopped when a projection 2'89, which is welded or
otherwise attached to the plate 283 makes contact with
the lift link 183 (FIG. 3). When the plate 283 has
reached the position shown in FIG. 3, the operator can
release the handle 185, and the plate 283 will remain in
position. In this position, the connecting pivot pin 205
not apply force to the pivot pin 93 until the toggle 171,
173 is broken off of dead center, and, therefore, the ini
tial manually operated raising of the thrust rod is not
restrained by the forces of the operating mechanism and
movable contact structure.
Locking means are provided to prevent a closing oper
ation by a pushing force on the handle.
A pad-lock
latch 194 (FIGS. 6 and 7) having an opening 196 there
in is pivotally mounted on a pin 190. A spring 192 ?ts
between the latch 189 and a bent over portion 198 of
“ an extension 280 of the pad-lock latch 194. The spring
192 biases the pad-lock latch clockwise which movement
is limited when the stop 282 engages a portion of the
operating handle 185. When it is desired to lock the
of the plate 283 is overcenter with respect to the operat
handle, the pad-lock latch 194 is rotated counterclock
ing shaft 187. The downward pull of the bottom spring 50 wise against the bias of the spring 192 moving the open
support and lift link
under the bias of closing spring
ing 196 out of the handle 185. A pad-lock is then in
153, therefore, tends to rotate the plate 263 in a clock
wise direction. The projection 289 which is engaging the
lift lin; 183, however, prevents further clockwise rota
tion of the plate 283, and therefore prevents downward
movement of the iift link 183 and bottom spring support
serted through the opening 196 retaining the pad-lock
Since the bottom spring support 151 cannot move
latch in position out of the handle 185. When the pad
lock latch is in this locked position and a pushing force
is applied to the handle 185, a stop portion 28-4 on the
pad-lock latch will engage the outer ?ange 286 of a U
shaped member 208 that is welded to the cross portion
down and since the top spring support 149, which is
locked by the toggle 171, 173, cannot move up, the
67 of the housing 65 thereby preventing manual closing
of the breaker by operation of the handle. To unlock
151.
closing spring 153 as shown in FiGS. 2 and 4, is latched
the handle, the pad-lock is removed and the pad-lock
in a compressed condition.
latch 194 moves clockwise under the bias of the spring
192 to the position shown in FIG. 6.
Releasing means are provided to unlatch the latching
means by operation of the handle 185 to allow expansion
of the compressed closing spring 153 to rapidly and force
fully close the circuit breaker contacts.
As seen in
Electromagnetic means, operable from a remote posi
tion, are also provided to unlatch the latching means in
' order to close the circuit breaker.
An electromagnet,
FIGS. 1 and 2, the projection 289, which extends from
the plate 283 has tapered portion 211 at the free end
thereof. A conical nesting type spring 213 is set over
the operating shaft 187 between a washer 215, which is
indicated generally at 221, is secured to the right side
of the housing 139. When this magnet is energized an
U~shaped frame 65. The spring 213 is strong enough
that it will not be compressed until the spring 193 (FIG.
6) is completely compressed so that it will not interfere
with the spring latching operation as previously de
rotating the lever 227 counterclockwise.
armature rod 223 moves-to the left, as viewed in FIG. 4,
and a head 225 on the rod 223 strikes a lever 227 which
attached to the shaft 187, and the cross member 67 of the 70 is pivo-tally connected to an ear 229 of the electromagnet,
scribed.
A lever 231 is attached by a set screw 233 to the
cross bolt 175 to which is connected the toggle link 173
(FIG. 2). Upon counterclockwise rotation, the lever
75 227 (FIG. 4) strikes the lever 231 rotating the lever 231,
3,073,929
.
8
said compressed closing spring, the expanding force
cross bolt 175 and toggle link 173 clockwise as viewed
or" said released closing spring moving saidmovable
in FIGS. 2 and 4. Clockwise rotation of the toggle link
contact structure to close said circuit breaker.
173 breaks the toggle 171, 173 off of dead-center, allow
4. A circuit breaker having relatively stationary con
ing the top spring support 149 to move upward under the
expanding force of the closing spring 153. The same Cal tact means and a movable contact structure cooperating
therewith to open and close said circuit breaker, a trip
rapid and forceful closing action as that previously
iree operating linkage for moving said movable contact
described occurs upon expansion of the closing spring
structure, energy storing means cooperating with said
153.
trip-free operating linkage to close said circuit breaker,
It is important to note that the operating linkage 83,
85 and ‘87 is trip free. During the opening operation as 10 means for energizing said energy storing means, means
for latching said energy storing means in an energized
previously described, the tripping toggle 33, “85 ?rst col
condition, means for unlatching said latching means to
lapses, and until the closing toggle 85, 87 collapses
release said energy storing means to close said circuit
downwardly to reset the tripping toggle 83, 85 into
breaker, and the Weight of said energy storing means
a thrust transmitting position the circuit breaker cannot
be closed. During the opening operation, it is the weight
of the spring closing mechanism 137 and of the operating
assisting in the resetting of said trip-free operating link
age during an opening operation of said circuit breaker.
5. A circuit breaker including, in combination relatively
linkage 83, 85 and 87 that pulls the thrust rod 177 and
stationary contact means, a movable contact structure
hence the closing toggle 35, \87 down to reset the linkages.
cooperating with said stationary contact means to open
From the foregoing description, it will be apparent
that a spring closing mechanism has been provided for 20 and close said circuit breaker, a trip-free operating link
age in thrust transmitting position to move said movable
rapidly and forcefully closing the contacts of a circuit
contact structure, aclosing spring cooperating with said
breaker independently of the operator’s strength. Rota
trip-free operating linkage to close said circuit breaker,
tion of an operating handle causes Compression of a
means for compressing said closing spring, means for
closing spring, and actuates means that latch the closing
spring in a compressed condition. A pushing force on 25 latching said closing spring in a compressed condition,
means for unlatching said latching means to release said
the operating handle causes unlatching of the latching
compressed closing spring to close said circuit breaker, >
means to allow expansion of the compressed closing
said operating linkage collapsing and being reset to a
spring to close the breaker. Locking means are provided
thrust transmitting position during an opening operation,
to prevent unlatching of the latching‘ means by operation
of the handle. The latching means may also be un 30 and the Weight of said spring closing means contributing
to reset said trip-free operating linkage during an opening
latched by operation, from a remote position, of an elec
operation.
7
tromagnet. The Weight of the spring closing mechanism
6. A circuit breaker having relatively stationary contact
also assists in resetting the trip-?ree linkages of the cir
means and a movable contact structure cooperating there
cuit breaker during an opening operation.
While the invention has been disclosed in accordance 35 with to open and close said circuit breaker, a trip-free
operating linkage for moving said movable contact struc
with the provisions of the patent statutes, it is to be
ture, a spring closing mechanism including a closing
understood that various changes in the structural details
spring for operating said trip-free operating linkage to
and arrangement of parts thereof may be made without
close said circuit breaker, an operating handle movable
departing from the spirit and scope of the invention.
I claim as my invention:
1. A circuit breaker comprising, in combination, rela
tively stationary contact means, a movable contact struc
ture cooperating with said stationary contact means to
open and close said circuit breaker, a closing spring, an
operating handle movable with a continuous motion to
40 to compress said closing spring, means for latching said
closing spring in a compressed condition, means operated
by said handle for unlatching said latching means to
release said compressed closing spring to'close said cir
cuit breaker, and the weight of said " spring closing
mechanism contributing to reset said trip-free operating
charge said closing spring from an uncompressed condi—
linkage during an opening operation.
tion to a compressed condition, means for latching said
closing spring in a compressed condition, and means op
tact means and a movable contact structure cooperating
erated by said handle for unlatching said latching means
to release said compressed closing spring, said released
closing spring operating independently of said handle to
free operating linkage for moving said movable contact
structure, a spring closing mechanism including a closing
move said movable contact structure to close said circuit
breaker.
2. A circuit breaker comprising, in combination, rela
tively stationary contact means, a movable contact struc
ture cooperating Withsaid stationary contact means to
open and close said circuit breaker, a closing spring, an
7. A circuit breaker having relatively stationary con
therewith to open and close said circuit breaker, a trip
spring for operating said trip-free operating linkage to
close said circuit breaker, an operating handle rotatable
to compress said closing spring, means for latching said
closing spring in a compressed condition, means operated
by a pushing, force on said handle for unlatching said
latching means to release saidcompressed closing spring
to close said circuit breaker, and the weight of said spring
closing ‘mechanism contributing to reset said ‘trip-free
operating handle rotatable to compress said closing spring,
means for latching said closing spring in a compressed
a
condition, means operated by said handle for unlatching 60 operating linkage during an opening operation.
8.
A
circuit
breaker
having
relatively
stationary
contact
said latching means to release said compressed closing
spring, said released closing spring moving independently
of said handle to move said movable contact structure
to close said circuit breaker, and locking means to pre
vent unlatching of said latching means by, operation of
said handle.
3. A circuit breaker comprising, in combination, rela
tively stationary contact means, a movable contact struc
ture cooperating with said stationary contact means to
open and close said circuit breaker, a closing spring, an
operating handle rotatable to compress said closing spring,
means for latching said closing spring in a compressed,
means and a movable contact structure cooperating
therewith to open and close saidcircuit breaker, a trip
,free operating linkage for moving said movable contact
structure, a'closing spring cooperating with saidtrip
free operating linkage to close said circuit breaker, means
for compressing said closing spring, means for latching
said closing spring in a compressed condition, means for
unlatching said latching means to release said compressed
‘closing spring to close said circuit breaker, said unlatch
ing means being operable from a remote position, and
the weight of said spring closing means assisting in the
' resetting of said trip-free operating linkage during an
opening operation of said circuit breaker. '
c
condition, and means operated by a pushing force on
said handle for unlatching said latching ‘means to release 75 ~ 9; A circuit breaker including, in combination, rela
'
3,073,929
9
1t)
tively stationary contact means, a movable contact struc
ture cooperating with said stationary contact means to
tively stationary contact means, a movable contact struc
ture cooperating with said stationary contact means to
open and close said circuit breaker, a closing spring, an
open and close said circuit breaker, a trip-free operating
linkage in thrust transmitting position to move said
movable contact structure, a closing spring cooperating
with said trip-free operating linkage to close said circuit
breaker, means for compressing said closing spring, means
operating handle rotatable to compress said closing spring,
a toggle linkage positioned on dead-center when said
closing spring is in a compressed condition, means oper
ated by a pushing force on said handle to break said toggle
‘for latching said Closing spring in a compressed condition,
linkage o? of dead center to release said compressed clos
ing spring, electromagnetic means operable from a remote
compressed closing spring to close said circuit breaker, 10 position to break said toggle linkage off of dead-center to
means for unlatching said latching means to release said
said unlatching means being operable from a remote
release said compressed closing spring, the expanding
force of said released closing spring moving said movable
position, said operating linkage collapsing and resetting
to a thrust transmitting position during an opening opera
tion, and the weight of said spring closing means con
tributing to reset said trip-free operating linkage during
contact structure to close said circuit breaker.
15. A circuit breaker including, in combination, rela
15 tively stationary contact means, a movable contact struc
an opening operation.
10. A circuit breaker comprising, in combination, rela
tively stationary contact means, a movable contact struc
ture cooperating with said stationary contact means to
open and close said circuit breaker, a closing spring, 20
ture cooperating with said stationary contact means to
open and close said circuit breaker, a first spring support,
a second spring support, a closing spring supported be
tween said ?rst and second spring supports, a toggle link
an operating handle movable with a continuous motion
to charge said closing spring from an uncompressed con
dition to a compressed condition, means for latching said
closing spring in a compressed condition, a ?rst un
said ?rst spring support, means operated by rotation of
said handle for moving said second spring support toward
said ?rst spring support to compress said closing spring,
age positioned on dead-center to restrain movement of
means operated by a pushing force on said handle to
latching means operated by said handle to unlatch said 25 break said toggle linkage off of dead-center allowing
latching means to release said compressed closing spring,
movement of said ?rst spring support and expansion of
and a second unlatching means operable from a remote
position to unlatch said latching means to release said
compressed closing spring, said released closing spring
moving independently of said handle to move said mov
able contact structure to close said circuit breaker.
11. A circuit breaker comprising, in combination,
relatively stationary contact means, a movable contact
structure cooperating with said stationary contact means
to open and close said circuit breaker, a closing spring,
an operating handle for compressing said closing spring,
said compressed closing spring, the expanding force of
said closing spring moving said movable contact struc
ture to close said circuit breaker.
16. A circuit breaker including, in combination, rela
tively stationary contact means, a movable contact struc
ture cooperating with said stationary contact means to
open and close said circuit breaker, a ?rst spring support,
a second spring support, a Closing spring supported be
tween said ?rst and second spring supports, a toggle link
age positioned on dead-center to restrain movement of said
means for latching said closing spring in a compressed
?rst spring support, means operated by rotation of said
condition, a ?rst unlatching means operated by said
handle for moving said second spring support toward said
handle to unlatch said latching means to release said
?rst spring support to compress said closing spring, means
compressed closing spring, a second unlatching means 40 operated by said handle to break said toggle linkage off
operable from a position remote from said circuit breaker
of dead-center to allow movement of said ?rst spring sup
to unlatch said latching means to release said compressed
closing spring, said released closing spring operating in
port and expansion of said compressed closing spring,
dependently of said handle to thereby move said movable
electromagnetic means operable from a remote position
to allow movement of said ?rst spring support and ex
contact structure to close said circuit breaker, and means
for locking said ?rst unlatching means to prevent un
pansion of said compressed closing spring, the expanding
force of said closing spring moving said movable contact
latching of said latching means by operation of said
handle.
12. A circuit breaker comprising, in combination, rela~
structure to close said circuit breaker.
17. A circuit breaker having relatively stationary con
tact means and a movable contact structure cooperable
tively stationary contact means, a movable contact struc 50
ture cooperating with said stationary contact means to
open and close said circuit breaker, a closing spring, an
therewith to open and close said circuit breaker, a trip
free operating linkage for moving said movable contact
structure, a thrust rod having one end connected to said
operating handle rotatable to compress said closing spring,
operating linkage, a toggle connected to the other end of
means for latching said closing spring in a compressed
condition, a ?rst unlatching means operated by a pushing 55 said thrust rod, a top spring support connected to said
toggle, said toggle being positioned on dead-center pre
force on said handle to unlatch said latching means to
venting upward movement of said thrust rod and said top
release said compressed closing spring, a second unlatch
ing means operable from a remote position to unlatch
spring support, a bottom spring support, a closing spring
said latching means to release said compressed closing
supported between said top and bottom spring supports,
springs, the expanding force of said released closing spring
an operating handle, means operated by rotation of said
moving said movable contact structure to close said cir
operating handle to lift said bottom spring support com
cuit breaker.
pressing said closing spring, means operated by said handle
13. A circuit breaker including, in combination, rela
to retain said bottom spring support in its lifted position,
tively stationary contact means, a movable contact struc
means operated by said handle to break said toggle off of
ture cooperating with said stationary contact means to 65
dead-center to allow upward movement of said top spring
open and close said circuit breaker, a closing spring, an
support
and expansion of said closing spring, electromag
operating handle rotatable to compress said closing spring,
netic means operable from a remote position to break
a toggle linkage positioned on dead-center when said clos
said toggle off of dead-center to allow upward movement
ing spring is in a compressed condition, means operated
by a pushing force on said handle to break said toggle 70 of said top spring support and expansion of said closing
spring, the expanding force of said closing spring moving
linkage oii of dead center to release said compressed clos~
said movable contact structure to close said circuit break~
ing spring, the expanding force of said released closing
er, said trip-free linkage collapsing and being reset to a
spring moving said movable contact structure to close
said circuit breaker.
thrust transmitting position during an opening operation,
14. A circuit breaker including, in combination, rela 75 the Weight of said spring supports and closing spring con
3,073,929
12
11
tributing to reset said operating linkage during and aperi
ing operation.
References Cited in ‘the ?1e of this patent
UNITED STATES PATENTS
1,072,177
Sessions ______________ __ Sept. 2, 1913
1,318,784
1,442,289
1,515,759
Scott _______________ __ Nov, 18, 1924
1,970,392
2,247,862
2,881,285
Paul ________________ __ Aug. 14, 1934
Thumm ______________ __ July 1, 1941
Bank ________________ __. Apr_ 7, 1959
Mahoney et a1 _________ __ Oct. 14, 1919
MacNeil __'__; _______ __ Jan. 16, 1923
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