close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2405606

код для вставки
Aug., 3.3? 3.946@ r
H. L, RAWUNS ETAL
¿www
CIRCUIT INTERRUPTER
Filled Jan. 16, 1941
l/ //
/ ///
/
//
0d ¿wel
/
//
/ //4.
///
/////////
//
/f/
/
/
/
/
/
/
WìïN-ESSES:
¿wmv
3 Sheets-Sheet 1
ALY-@go my i945»
H. L. RAWUNS ETAL _
'~
CIRCUÍT INTERRUPTER
Filed Jan. 16, 1941
4
wlTNl-:ssEs:
@ifm f
2,405,606
5 Sheets-Shejet 2
’ê
-
'
INVENTOR
Aug. 13, 1946.
H. |__. RAvyLlN’S ETAL
2,405,606
CIRCUIT INTERRUPTER
Filed Jan. 16, 1941
/84
. 3 Sheets-Sheet 5
n
x
52
2,405,606;
Patented Aug. 13, 1946
lUNITED STATES PATENT OFFICEv
2,405,606
CIRCUIT INTERRUPTER
Herbert L. Rawlins, Wìlkinsburg, and James M.
ïWallace, Braddock, Pa., assignors to Westing
house Electric Corporation, East Pittsburgh,
Pa., a corporation of Pennsylvania
.
.
'
Application J anuary’lß, 1941, Serial No. 374,685
40 Claims. (Cl. 20D-89)
1
This invention relates generally to circuit in
terrupters, and more particularly to circuit
breakers and their operating mechanisms.
This invention is especially adapted for use in
small reclosing circuit breakers wherein it has
certain particular novel cooperation providing
2
ber of successive reclosures thereof, but which is
ineffective to maintain said contacts separated
in response to any number of non-successive re
closures, or any number of successive reclosures
less than said predetermined number.
`
'
These and other objects of this invention will
certain novel and useful results, however it
should be understood that many features oi this
invention are capable of use with other types
of circuit breakers and even with other types of
become more apparent upon consideration Vof
a detailed description of a preferred embodiment
are not self-clearing.
the position of the parts with the breaker con
thereof, When taken in connection with the at
tached drawings, in which
Figure 1 is a substantially central, longitudi
apparatus.
nal sectional view of one form of a circuit in
In automatic reclosing circuit breakers, it is
terrupter embodying the features of this inven
sometimes desirable to have varying trip char
tion.
acteristics. Thus it is desirable in certain in
Fig. 2 is a view similar to Fig. 1, but taken
stances to provide for relatively quick ñrst open 15
from the opposite side thereof and showing cer
ing, and a slower second opening to obtain bet
tain of the parts in elevation and with the outer
ter coordination with fuses when the circuit pro
casing removed.
tected is subject to surges. Another advantage
Fig. 3 is a side elevational View of the mecha
of a second time delay tripping is that it gives
the fault an opportunity to burn clear. The 20 nism shown in Figs. 1 and 2, ,with a portion of
the supporting frame removed, and
Y
breaker trippings after the second trip are pref
Fig. 4 is a view like Fig. 3 but illustrating
erably relatively fast to take care of faults which
tacts locked open.
ì
Accordingly, one object of this invention is to
Referring to the drawings, the embodiment of
provide novel mechanism for controlling a re 25
the invention illustrated includes a circuit in
closing circuit breaker.
terrupter adapted to be contained in an insulat
Another object of this invention is to provide
novel operating mechanism for a reclosing circuit
breaker which is operative to lock the breaker
contacts open in response to a predetermined
number of successive reclosures thereof.
ing tubular casing 2, which may be of any de
sired insulating material, such as porcelain glass,
or the like. The casing 2, as shownin Fig-1,
has a closed bottom end portion and an open
top. The open top is provided with an upper
-terminal cover assembly 4, and -‘the closed b_ot
tom of the casing is provided with a lower ter
a plurality of successive cycles of operation, novel 'E minal assembly 6. An intermediate portion of
the casing has a substantially cylindrical outer
means for providing an intermediate time delay
wall portion 8, upon which is mounted a cushion
opening of the breaker in any series of successive
ing sleeve Ill of rubber, über or the like, and
operations thereof.
on opposite sides of which may be clamped sup
Another object of this invention is to provide
a novel arrangement of circuit breaker operating 40 porting bracket halves l2 (only one of which is
shown) as by bolts I3. The sup-porting bracket
mechanism in a breaker of the type described.
portions l2 are adapted to be extended at one
Another object of this invention is to provide
end thereof to support the interrupter in an
a novel compact arrangement of parts in a cir
operative position.
cuit breaker of the type described.
The lower terminal assembly 5 is mounted at
Another object of this invention is to provide 45
the closed bottom portion of the insulating cas
a novel circuit breaker construction which is
ing 2 by means of a conducting bolt I8, extend
adapted to automatically open and close the cir
ing through an aperture I9 in the closed end _of
cuit successively a predetermined number of times
casing 2, and the bolt is provided with an en
and then lock the breaker open in response to '
predetermined continuing electrical conditions 50 larged disc-like head portion 20 positioned with
in the casing, with packing material 22 inter
of the circuit.
posed between the head 20 and the adjacent
A further object of this invention is to pro
inner surface of the closed end of insulating
vide in an automatic reclosing circuit breaker,
Another object of this invention is to provide
in a circuit breaker of the type which is adapted
to automatically open and close the circuit in
novel means for maintaining the contacts thereof
separated in response to a predetermined num- i..
casing' 2. The packing material 22 `may be of
any desired packing - material, preferably one
2,405,606
3
4
which is resistant to oil, such, for example, as
engaging flanges 43 and an integral lip 5l) formed
cork, liber or a synthetic rubber. Bolt I8 has
a bore I4 therethrough, the outer end of which
is closed by a threaded plug IB for the purpose
of draining casing 2 when desired. The bolt I8
is secured in position by a nut 24 drawn up on
the bolt against a washer 26, positioned between
the nut 24 and the outer wall at the closed end
of casing 2. A terminal strap 23 having con
nector elements 3| thereon, may be also secured
to the bolt I8 by means of a second nut 30,
on cover 32.
as shown.
>
'
The upper terminal assembly 4. is in the form
of a cover for the open end4 of the casing and,
as will be hereinafter more fully explained, also
acts to secure the support for the interrupter
and operating mechanism in o-perative relation
at the open end of the casing.
Referring to Figs. 3 and 4, it will be noted that
The interrupting chamber 62, includes a tubu
lar insulating chamber portion G4 formed of any
desired insulating material such, for example, as
liber or the like, which is adapted to have one
end thereof threadedly engaged with a threaded
socket 6I] formed integral with the lower ends of
supporting plates 58. The upper wall of socket
Sil is provided with a plurality of spaced outlet
passages 66, which are controlled by a disc-like
valve member 68 mounted within insulating tube
64, and which operates to control the outlet pas
sages ßâ in a _manner to be hereinafter described.
Insulating tube 54 of the interrupter chamber is
provided at the other end thereof with an end
cap lil,V threadedly engaged with the lower end
of the insulating tube to close the same. The
cap l@ is provided with passages 'I2 for the flow
the cover 32 is provided with a transversely exn 20 of fluid into arc chamber 52, and these passages
are controlled by a check valve plate 'I4 adapted
to be, seated over inlet passages 12, within arc
tending hollow portion for the reception of cer
tain parts of the circuit breaker operating mech
anism. and the top wall of this hollow portion
chamber G2. End cap 'Iii is also provided with
a substantially centrally located threaded aper
ception of a screw threaded ñller plug 34, so »
ture for the reception of a threaded ñxed contact
that the supply of arc extinguishing huidv within
16.
the casing. 2 may be renewed when necessary.
A movable contact assembly is adapted to co
Cover 32 also includes a peripheral flange por
operate with ñxed contact i3, and includes a
tion 36 adapted to seat on the upper end walls
relatively short contact rod 'I8 located within in
of casing 2, and this ñange has at its outer edge 30 terrupting chamber S2, and having an enlarged
a downwardly turned lip portion 38, to aid in
Contact portion 'F9 with a tapered outer end for
properly positioning the cover on the open end
engagement with fixed contact 1.5. Short contact
of casing 2. Packing material 4Q is interposed
rod 'I8 is adapted to have the upper end thereof,
is provided with. a threaded aperture for the re
between the cover flange 35 and the open end of
the casing, and this material is preferably similar
to packing material 22 previously described, Cov
er 32 is secured to the casing 2 by means of a
support 42, ñxedly mounted on the outside of
casing 2. Support 4-2 is in the form of an annu
lus which is substantially channel-shaped in
cross section, with the channel facing the outer
surface of casing 2. The annular support 42 is
secured to casing 2 by cast metal or the like
44, which is poured in between the support 42v and
the outer casing wall, so as to enter within the ’~
channel support 42 and between corrugations 4.6
provided on the outer surface of the casing to
securely anchor the support 42 thereto. Cover
32 is preferably secured to support ring 42 by
spaced bolts passing through integral outstand- '
ing ears (not shown) provided on the cover and
supporting ring, respectively.
The casing and
its terminal assembly thus :Ear described are sub
stantially like that disclosed and claimed in the
copending application of J. M. Wallace, Serial ~'
No. 345,051, nled July 12, 1940, and assigned to
the same assignee as this invention.
As stated above, cover 32 is adapted to secure
a support for the interrupter and its operating
mechanism in operative relation at the open end
of casing 2. This support for the interrupter and
its operating mechanism (as shown) includes an
upper substantially rectangular open frame por
tion having top and bottom walls 52 and 56, re
spectively, and side walls 54. Depending from
the bottom wall 5B of the upper rectangular frame
portion, are a pair of spaced, substantially par
allelly extending supporting plate members 58,
for supporting the interrupting chamber B2 at the
lower ends thereof. The upper rectangular sup
porting frame portion is provided adjacent the
top wall 52 thereof, with oppositely positioned,
outwardly extending supporting flanges 43, adapt
ed to be positioned on top of the end wall of
casing 2, and be secured in position by SCTGWS. 53
as viewed in the drawings, threaded into a bore
provided centrally of an insulating contact sup-A
porting rod 80, which is slidably mounted in a
central aperture provided in socket EQ. The lower
end of insulating contact rod 30 is provided with
a counter-bore 82 for receiving a coil compres
sion spring 84, adapted to be seated at the other
end thereof on a liquid director member 86. The
liquid director 86 is substantially circular in form
and includes a base portion 88 having a substan
tially central aperture for slidably mounting the
director on short contact rod 18, for movement
between enlarged portion 'I9 of the contact rod
and the lower end of insulating contact rod 86.
Coil spring 84 normally biases the liquid director
86 towards. the enlarged end 'I9 of short contact
rod 18. However, in the. closed position of the
contacts, as shown, for example, in Fig.> 1, spring
84 will be compressed, so that the liquid director
Vwill be located adjacent to the lower end of in
sulating contact> rod 80. The liquid director 8S
is provided with passages therethrough for dí
recting the liquid into the path of an arc drawn
when the contacts separate, and these include an
outlet en located adjacent the enlarged contact
portion "I9, and this opens into a divergent pas
sage 32 in the director, which in turn communi
cates with. a plurality of spaced inlet passages 94,
into which liquid contained in the interrupter
chamber 62 is adapted to flow when the liquid
director is moved upwardly. In the closed posi
tion of the contacts, liquid director 86 is adapted
to rest on a stop ring 96 secured between a
shoulder 98 on end cap "I0, and the lower end
of insulating tube 64. Valve plate S8 at the up
per end of interrupting chamber 62 is provided
with an integral angular flange |00 adapted to
form a substantially annular groove about the
outer surface of insulating contact rod 80, for the
reception of packing material IGZ to frictionally
associate valve plate 68 with insulating contact
rod 8U.
2,405,606
6
5
With the exception of contact supporting rod
80 being of insulating material, the interruptor
structure described above is substantially the
same as that described in the copending applica
tion of J. M. Wallace, Serial No. 374,684, iiled
January 16, 1941, and assigned to the same as
signee as this application, now matured as Pat
ent No. 2,352,048, issued June 2i), 1944. Conse
quently, for a fuller understanding of the struc
cured to connecting rod |06 as by a pivot pin |08.
The toggle levers l |0 are adapted to diverge and
have their opposite ends slotted to receive fixed
guide pins | i2, respectively, mounted on integral
supporting lug portions H4 formed on cover 32;
A coiled compression spring | I6 is adapted to be
coiled about each toggle lever H0 to- react be
tween the supporting pins ||2 and a shoulder
formed on each toggle lever | lil to normally bias
ture and operation of the interrupter, reference is 10 actuating rod |04 in a direction to force contact
hereby made to the above-mentioned copending
application. Brieñy, the operation of the inter
rupter 62 is as follows. When contact support
ing rod 80 is moved upwardly carrying with it
portion 19 into engagement with ñxed contact 1E.
In order to separate the contacts, a solenoid
coil ||8 is adapted to be mounted in the rectan
gular portion oi the supporting frame, and the
contact rod 18 and contact portion 19, the liquid 15 coil is provided with a core |20 adapted to be
drawn up into a center bore in the coil. The so
director 36 is held in engagement with stop
lenoid core |20 is movably mounted onv con
ring 96, until the base 88 thereof is engaged by
necting rod |04, and is provided with a counter
the enlarged contact portion 19, by the biasing
action exerted by coil spring 84.
However, as
bore portion |22 for receiving therein a coil
Preferably, the core plug ||9 at the
upper end of solenoid coil | |8 is, like movable
core |29, and sides 54 of the supporting frame, of
soon as the contacts separate an arc will be 20 spring |23.
drawn therebetween causing vaporization of the
arc extinguishing fluid which will build up pres
sure within the interrupting chamber 62. This
pressure forces check valve plate 14 to seat on and
close oli inlet passages 12, and upward move
ment of contact rod 80 carries valve plate 68 into
a closed position with respect to outlet passages
65, to thereby eiîectively seal the interrupting
chamber B2 during the circuit interrupting oper
a magnetic material, so as to form a closed mag
netic path when plug ||9 is engaged by movable
core |20.
The solenoid coil ||8 is adapted to be con
nected in series in the circuit through the inter
rupter, as Will be hereinafter described, and upon
the occurrence of overload conditions in the cir
ation. As soon as the enlarged contact portion 30 cuit, the solenoid coil will attract movable core
|20, and move the same upwardly without mov
19 on contact support 18 engages wall 88 of the
ing rod |04 or contact 19, until coil spring |23
liquid director, the director is moved upwardly
engages the lower end |05 of, connecting rod |66.
along with the contact, and liquid will flow
From this point on, further movement upwardly
through inlet passages 94 and be directed
through outlet passage 90 which will now be po 35 of movable core |20 will cause compression of
spring |23, until the upper end of the core en
sitioned as shown in Fig. 4 of the drawings. .to
gages shoulder |24 on connecting rod |06 to de
direct liquid through the arc path. This lost
liver an impact on connecting rod. |04, to sepa
motion between the contact and liquid director,
rate contact portions 19 and 16, notwithstanding
when the circuit is interrupted, permits easy ini
tial opening movement of the contacts and allow 40 any possible welding of the contacts together.
sufficient pressure to build up within the inter
rupter chamber 62. to close the valve 14, and per
mits the arc to reach an optimum length before
subjecting the same to currents of arc extin
guishing liquid. It will be noted that the pres
sure built up Within the interrupter chamber will
also act on the relatively large contact support
ing rod 80 to assist in moving contact 18 away
from nxed contact 15, inasmuch as the support
ing rod 80 fits in a piston-like manner in socket
60.
After the circuit is interrupted, the contacts
may be reclosed and it will be apparent that as
soon as contact supporting rod 80 moves down
This will cause contact 19 to move upwardly and
it is carried for the completion of its stroke after
solenoid core |29 engages plug core H9, by the
force stored in coil spring |23.
Coil spring |23
is preferably of such strength as to overcome the
force exerted by toggle springs |56 after a pre
determined strain thereof. Moreover, it may be
noted that the force exerted by toggle springs | l5
in a direction to cause engagement of contact
portion 'I9 with ñxed contact 16, will decrease as
the contact 19 moves upwardly, because of the
toggle effect of levers H0. Moreover, the open
ing movement of the contacts is further aided by
ythe pressure which may be developed by thearc
formed when the contacts separate, acting to
wardly, it will carry valve plate 68 with it into
move Contact rod 19 upwardly, as described
engagement with the upper edge of insulating
above.
tube 64, which is notched as at 6|, to permit free
Movable solenoid core |20 is provided adjacent
outlet of used fluid and any gases which may
the lower end thereof with oppositely projecting
have been produced by the interrupting opera
tion. At the same time, the head of liquid in 60 pins |26 having enlarged outer ends for recep
tion in guide slots |28, formed in supporting
insulating casing 2 will cause check valve plate
plates 50, to prevent rotation thereof about a
14 to raise and allow fresh ñuid to enter inlet
longitudinal axis. A rack |3| is adapted to be
passages 12 to replace the used liquid.
pivotally mounted on one of the pins |26 for en
Contact supporting rod 85 is adapted to be ac
gagement, in one position of solenoid core |29,
tuated by an elongated actuating rod |04 thread
with a pinion |30 mounted on a shaft |34 extend
edly engaged in a bore in the upper end of rod
ing between, and rotatably mounted in the spaced
80, and having the opposite end secured in a
frame members 58. A spring |32 is adapted to be
threaded socket .in the lower end of a connect
coiled about guide pin |26, with one end thereof
ing rod |05. The connecting rod |06 has an en
larged portion forming a shoulder |24, and the 70 engaging movable core |20, and the other end
thereof engageable with rack |3I, to normally
enlarged portion is adapted to be slidably mount
urge the rack into engagement with pinion |30.
ed in a closure plug ||9 secured in upper wall 52
It will be noted that the teeth on rack |3| are
of the supporting frame. The upper end of con
inclined downwardly so that in the upward motion
necting rod |05 is bifurcated for receiving the
ends of a pair of toggle links ||0 pivotally se 75 of the rack with movable core |20, the teeth
2,405,606
of the rack will slide freely over the teeth of
pinion |30; but on downward motion of the rack
the teeth will engage pinion |30 to rotate the
same in a clockwise direction as viewed in Figs.
3 and 4. A relatively large gear |30 is also ñxed
to shaft |34, and this shaft, together with pinion
|30 and gear |38, are biased in a counterclock
wise direction by a spring |36 coiled about shaft
|34, and having one end thereof engageable with
the supporting frame, and the other end thereof
engaging a pin |40 on gear |33. The pin |40 pro
jecting from one side of gear |33 is adapted to
control a trip controlling member in a manner
to be hereinafter further speciiied.
A short stop lug |42 projects from the opposite
3
paddle wheel |16, positioned below the level of
the arc extinguishing liquid within casing 2.
In the operation of the mechanism thus far
described, it can be seen that when the contacts
are opened by sufficient energization of solenoid
coil ||8 to draw movable core |20 upwardly into
the coil, that even prior to movement of contact
19 by the solenoid, rack |3| will engage pinion
|30, irrespective of the amount of travel of the
contact necessary to interrupt the circuit. After
interruption occurs, contact 10 is moved into
engagement with fixed contact 16 by toggle
springs | I6. This circuit closing operation will al
ways cause rack | 3| to rotate the time delay
mechanism a predetermined amount, inasmuch as
side of gear |38 and is normally adapted to en
rack |3| is secured to solenoid core |20 and,
gage a lever |44 pivotally mounted on the sup
therefore, its movement is independent of the
porting frame, as by the pivot pin |46, and en
amount of separating movement of the contact
gageable at the outer end thereof with shaft |34,
rod |04 as pointed out above. As the contacts
so that, as viewed in Figs. 3 and 4, the stop- pin 20 are reclosed following an initial circuit interrupt
|42, by its engagement with lever |44, limits
ing operation, it will be observed that rack |31
movement of gear |38 in a counterclockwise di
will rotate gear |38 in a clockwise direction as
rection under the influence of spring |36. A con
viewed in Figs. 3 and 4 against the bias of spring
trol lever |50 is preferably pivotally mounted as
|36, and this rotation will remove control pin
at |48, on one supporting plate 56, and is pro
|40 from contact stop lever |64 to permit this
vided at one corner of the free end thereof with
lever to be moved by spring |13 in a counterclock
a curved catch |52, insulatingly secured to con
wise direction about pivot |62, to a position limited
trol lever |50 in any desired manner, and adapted
by connecting stop portion |66 and wherein the
to be engaged by an adjustable stop lug |54
hook portion |61 of the lever is positioned at a
mounted in the free end of a bimetal element |56. 30 point to intercept pin |26 on solenoid core |20, in
Bimetal element |56 is supported from` the frame
the event a closely succeeding interrupting op
58 by an angular bracket |58 and is of conven
eration occurs. In the event the overload on the
tional construction, that is, it includes a pair of
circuit has disappeared when the contacts are re
laminations of materials having different coefñ.
closed, gear |38 will be rotated in a counterclock
cients of expansion intimately secured together, »l wise direction by spring |36 slowly, since spring
with the material having the larger coefficient
|36 must operate the time delay gearing and
of expansion comprising the lower lamination, so
paddle wheel |16, until eventually control pin |40
that upon being heated, the bimetal will defiect
re-engages portion |68 of contact stop lever |64
upwardly as Viewed in the drawings.
and moves it back to the position shown in Fig. 3
It can be seen, therefore, that the bimetal
of the drawings. In this position, it is obvious
lug |54, normally, as shown in Fig. 3, prevents
that in the event an overload again occurs in the
counterclockwise rotation of control lever |50.
circuit, the contacts will be quickly separated by
Clockwise rotation of control lever |50 about its
solenoid | I8.
pivot |48, is limited by a laterally projecting stop
In the event, however, that upon reclosure after
lug |60 integralwith the lever, and engageable
the iirst interrupting operation of the circuit
with an edge of the adjacent supporting plate 58.
breaker, the overload still exists on the circuit,
At the other corner of the free end of control lever
solenoid coil | | 8 will immediately again lift mova
|50, there is pivotally mounted as at |62, a con
ble core |20 upwardly, but its movement in this
tact stop lever |64. This lever, at its upper por~
direction is now limited by hook portion |61 of
tion, comprises a pair of legs pivoted on pivot pin
contact stop lever |64, so that its movement will
|62, at opposite sides of control lever |50, and
be halted before it is operative to raise contact 19.
having laterally extending integral portions |63,
However, bimetal |56 is connected in series with
connected at their outer ends by an integral stop
solenoid coil | I8 in. the circuit through the inter
portion |66, which is engageable with control
rupter, as will be hereinafter pointed out, and
lever |50 in the position of Contact stop lever
after a predetermined period of time the bimetal
|64 shown in Fig. 4 of the drawings, to limit rela
becomes heated by the overload current, and de
tive counterclockwise rotation thereof. One leg
iiects to the position shown in Fig. 4, thus re
of contact stop lever |64, and control lever |50 are
leasing catch | 52 on control lever |50, so that this
provided with lateral extensions |60 and |1|, re
lever and stop lever |66 are now free to rotate as
spectively, which are apertured so that the ends 60 a unit about pivot |48 of lever |50, under the
of a coiled tension spring |13 may be hooked into
biasing force exerted by the solenoid pull through
these extensions to bias contact stop lever |64,
pin §26 on hook portion |61, which pull is exerted
relative to control lever |50, in a counterclock
along a line offset with respect to pivot |48. 'I'his
wise direction about pivot point |62. One of the
will free the pin |26 and permit the contacts to
legs of contact stop lever |64 is extended, as
be opened in the manner previously described.
shown at |68, so as to be engageable by control
After the circuit is interrupted the contacts will
pin |40 on gear |38, to normally maintain the con
be reclosed by toggle springs ||6, with the re
tact stop lever in the position shown in Fig. 3
closure again being delayed by operation of the
of the drawings, so that the stop portion |61 of
time delay mechanism by rack |3I. If the fault
the lever is maintained out of the path of move
has been cleared after the second reclosure, bi
ment of pin |26 on solenoid core |20. Gear |38
metal l56 will gradually assume its normal posi
is adapted to drive a time delay means, compris
tion shown in Fig. 3 to engage catch |52 on trip
ing pinion |10 with which gear |38 meshes, gear
control lever |56, and gear |38 will be eventually
|12 ñxed for rotation with pinion |10, and pinion
rotated to the position where control pin |40 re
|14 adapted to mesh with gear |12 for driving a 75 moves stop portion |61 of lever l 64 from the path
2,405,606
10
9 .
of movement of solenoid pin |26, and stop pin
| 42 engages lever |44. It should be noted that
control lever |50 is normally biased to the posi
tion shown in Figs. 3 and 4 of the drawings, that
is, where stop lug |60 thereof engages the edge of
adjacent support plate 58, by a spring |5| coiled
about pivot |48 and engaging stop lug |80, and
adjacent supporting plate 58.
If the fault has not been cleared by the time the
second reclosure is made, the breaker contacts
are again quickly separated by solenoid coil ||8,
to its normal position shown in Fig. 3. However,
in the event of the. occurrence of a continuing
fault on the circuit, before gear |38 is restored
to its original position following a reclosure of the
breaker contacts, these contacts are again re
opened and gear |38 upon a second reclosure of
the contacts is further advanced a predetermined
distance in a counterclockwise direction by rack
|3|, to bring stop lug |42 into engagement with
the upper edge of lever |44 to move lockout lever
|80 into engagement with rod |04 just prior to
engagement of the contacts. Now if the fault
still remains, the contacts are instantaneously re
tacts separate because the bimetal has not had
opened before gear |38 can be moved any sub
time to cool down, and consequently will remain
stantial distance from its thus advanced position
in the position shown in Fig. 4 of the drawings;
in a v.counterclockwise direction, at this time
and, therefore, levers |64 and |50 may be rotated
shoulder |84 onrod |04 cams lockout lever |80
about pivot |48 by core pin |26 on the upward
outwardly in its upward movement so that when
stroke of the solenoid core.
a third reclosure is attempted by toggle springs
It can be seen from the foregoing that upon the
occurrence of a continuing fault in the circuit, the 20 | I6, the integral shoulder |84 on rod |04 will en
gage the lockout lever |80 and prevent reolosure
breaker contacts will be opened a plurality of
of the circuit breaker contacts. It will be noted
times, with the ñrst interrupting operation oc
that pinion |30 is provided with a solid tooth
curring substantially instantaneously in response
portion |83which, when rack |3| attempts ,to
to the occurrence of the fault, and the second
closely succeeding interrupting operation will be 25 reclose the contacts a third successive time, will
be moved to engage and cam rack |3| out of en
delayed a predetermined time depending upon the
gagementwith pinion |30, and thereby permit
time necessary to heat bimetal |56. Thereafter,
the rack and solenoid core |20 to drop down un
any subsequent interruption will be relatively
der the influence of gravity and spring |23 to
faster because the time delay means |56 being in
the position shown in Figs. .l and 3. This will
a deflected position, will be inoperative to delay
and this time there is no time lag before the con
any such closely succeeding tripping operation.
obviously permit spring |36 to reset gear |38 into
engagement with the inclined end of lever |44.
However lockout .lever |80 is maintained in the
position shown in Fig. 4 to lock the contacts open
fault occurs at a later time, the same sequence of 35 by reason of its frictional engagement with shoul
circuit interrupting operations will occur, that is,
der |84.
.
To reset the breaker, that is, t0 place it in
a ñrst quick opening of the contacts, a second
service again following an automatic lockout op
time delay opening, and a quick opening there
eration, itis necessary to raise the moving con
after. In connection with the intermediate time
delay opening operation of the breaker contacts, it 40 tact in order to release lockout lever |80 and
permit spring |18 to move the lever away from
should be noted that the lost motion connection
rod |04 and thus release the movable contact and
of the solenoid core with the movable contact, is
permit the same to be reclosed by toggle springs
utilized to prevent separation of the contacts for
a time predetermined by bimetal |56. The above
The movable contact may be manually lifted
described arrangement of successive circuit in
by means of a lever |86 secured to a shaft |81
terrupting operations has the advantage that bet
extending transversely across the hollow portion
ter coordination with fuses can be obtained when
the circuit being protected is subject to surges.
of cover 32, with one end thereof extended out
side of the hollow portion of the cover to have
Means are provided in association with the
secured thereto an operating crank |90.A The
mechanism described above for locking the break
crank |90 has an enlarged aperture |92 at the
er contacts in open circuit position, in response
outer end thereof, for the reception of a hook
to a predetermined number of closely successive
stick operating member or the like. It will be
interrupting operations. The lever |44 Vpreviously
noted that operating vcrank lever |86 is pro
referred to, is adapted to control this lockout
means, and it will be noted that this lever is nor- „ vided with a curved inner end |88, positioned
at one side of toggle levers ||0 and beneath
mally biased into engagement with shaft |34, by a
However, in the event that the fault clears after
any reclosure of .the breaker contacts, the mecha
nism will reset so that whenever a continuing
||6.
,
.
.
.
spring |18 coiled about pivot |46, and engageable
toggle pivot pin |08, so that although rod |04
with a lateral extension of the lever and with
socket portion 80 of the interrupting chamber.
and movable contact 19 may be raised by lever
|86 manually, contact 19 cannot be moved into
Also pivotally mounted on the lever pivot |46, is a
lockout lever |80, which is biased with respect to
lever | 44, for movement in a counterclockwise di
engagement with the fixed contact 16 by this
lever, and consequently it is obvious that the
breaker contacts are trip free of manually oper-A
rection, by spring |82 also coiled about pivot |46,
and having opposite ends thereof engaging lever
matically opened by the current responsive trip
able lever |90 inasmuch vas they may be auto
|44 and lockout lever | 80. A lug |8| on lockout '
lever |80 is engageable with a lateral extension
of lever |44 to limit movement of lockout lever
|80 relative to lever |44 under the influence of
its spring |82.
As previously described, each time the inter- H
ping means, independent of operation of the
manual control lever |90.
As in copending application of H. L. Rawlins
rupter contacts are closed, rack |3| is operative
to rotate pinion |30 and, therefore, gear |38 in
aV clockwise direction as viewed in Figs. 3 and 4
of the drawings, and after the contacts are re
the cover 32 may be provided with a manually
operable locking means for maintaining the
breaker contacts in an open circuit position when
desired, asby a locking lever 2 I0 pivotally mount
closed, the gear |38 is then slowly moved back
ed on the outside of the cover as at 2|2 and nor
and -J. M. Wallace, Serial 346,300, filed July 19,
1940, Patent No. 2,318,421, issued May 4, 1943, and
assigned to the same assignee of this invention,
11
2,405,606
12
mally resting on a supporting rib 2M. Operat
ing crank |9il is provided with an integral stop
shoulder 2HE positioned so as to be engageable
spe‘ciiically` claimed herein are' 'disclosed and
with locking lever 2|0 when the latter is man
division of this application which is assigned to
the' same assignee of this invention.
Having described a preferred embodiment of the
invention in accordance with the patent statutes,
it is desired that the invention be not limited to
this particular embodiment inasmuch as it will be
obvious particularly to persons skilled in the art
that many modifications may be made in this
particular structure and still remain within the
scope of this invention. Accordingly, it is desired
that the invention be interpreted as broadly as
possible and that it be limited only by what is ex
pressly set forth in the following claims and by
ually rotated clockwise as viewed in Fig. 2, when
the operating crank is in its lower position cor
responding to the open circuit position of the
contacts. The cover may also be provided with
a sight glass |94 as in the aforesaid copending
application for observation of a rod |96 mounted
on a iioat |93, to render the level of arc ex
tinguishing fluid readily visible from the exterior
of the interrupter. Likewise, the cover may em
body a terminal 2GB for connection of a circuit
conductor thereto.
The electrical circuit through the breaker may
be traced from the lower terminal 3|, conducting
strip 28 to bolt iii, its enlarged head 2D, through
coiled compression spring 'l5 engageable between
claimed in our copending application Serial No.
564,442, filed November 2l, 1944, and comprising a
the prior art.
’
are claim as our invention:
l. In circuit interrupting means, separable con
the enlarged head 20 of bolt I8 and end cap lil 20 tacts, a single means responsive to a predeter
of interrupter chamber 62, through ñxed oon
mined circuit condition controlling separation of
tact lt and contact rod 78. The insulating con
said contacts comprising a relatively quick acting
'tact rod support 8i) is provided with an oiî cen
control device,- means for automatically closing
ter bore itâ for receiving a ñexible conductor 2%2,
said contacts following a circuit interrupting op
which is connected to ‘contact rod 19 as at 206,
eration, blocking means automatically eifective in
and this iiexible conductor is directed upwardly
response to a circuit interrupting operation for
to be connected to one end of solenoid coil H8.
preventing operation of said control device to sep
The other end of solenoid coil ||8 is connected
arate said contacts, and time delay means opera
by a iiexible conductor 267, t0 the free end of
tive to render said blocking means ineffective to
bimetal läâ, and since the bimetal is supported 30 permit said control device to separate said con
on -frame supporting plate 58, the circuit pro
tacts only a predetermined time after a first cir
ceeds from the bimetal through the frame to cap
cuit interrupting operation, whereby upon the` oc
32 and terminal Zûil. It can be seen, as previously
currence oi said predetermined condition said
referred to, that the coil H8 and bimetal |56
control device will cause a quick separation of said
are thereby arranged in series. circuit relation so `
contacts and thereafter said contacts Will auto
as to be effective to interrupt the circuit in the
matically reclose, and if said predetermined con*
manner described above.
dition Still exists said contacts will be separated
From the foregoing, it can be Seen that the cir
a second time by said control device only a prede
cuit breaker constituting this invention is capable
termined time after the first circuit interrupting
of giving a relatively quick or an instantaneous
operation.
opening when an overload ñrst occurs on the cir
2. In circuit interrupting means, separable con
cuit, and in the event the overload continues after
tacts, means controlling separation of said con
automatic recl'osure 0f the breaker contacts, a
tacts including relatively quick acting means for
second time lag opening will occur, and thereafter
separating said contacts in response to predeter
in ne event the fault continues the subsequent ‘ mined conditions, means for automatically reclos
opening wiil be a quick or instantaneous one, and
ing said contacts in response to a circuit inter
thereafter the breaker contacts will be locked in
rupting operation, and time delay means auto
open circuit position. It will also be noted
matically engageable with said quick acting
that the time delay means operative to delay a
means in response to a circuit interrupting oper
reclosure of the breaker contacts is dependent ~
upon the viscosity of the arc extinguishing ñuid,
so that the time delay in reclosing the breaker
contacts will correspond to the time necessary for
flushing the interrupting chamber so as to always
insure a goed flushing action and replacement of
used arc extinguishing liquid in the interrupting
chamber $2, with fresh liquid. Another impor
tant feature is that this time delay in reclosure
of the breaker contacts will be a constant value
for any given viscosity of arc extinguishing fluid,
due to the fact that the time delay is controlled
by movement of the solenoid core, rather than by
movement of the contacts, and because of the lost
motion between the core and movable Contact, the
movement of the core will always be suiiicient to
engage rack I3! with the time delay reclosing
means on each interrupting operation of ' the
breaker. Also novel means have been disclosed
for locking the .breaker contacts in an open cir
cuit position in response to a predetermined num
‘c'er of closely successive interrupting operations,
but which will be inoperative to lock the breaker
contacts open irrespective of the number of non
successive interrupting operations of the breaker.
ation for delaying a closely succeeding circuit in~
terrupting operation by said quick acting means
for a predetermined time after reclosure of said
contacts> in the event said predetermined condi
tions continue.
3.. ïn circuit interrupting means, separable con
tacts, means controlling Separation of said con
tacts including means for relatively quickly sep
arating said contacts in response to predeter
mined circuit conditions, means responsive to a
'l first circuit interrupting operation for preventing
separation of said contacts by said contact con
trolling means, time delay means also responsive
to said predetermined circuit conditions for ren~
dering said lastmentioned means ineffective a
predetermined time after a iirst circuit interrupt
_ing operation in the event said predetermined
conditions remain on the circuit.
4. In a circuit interrupter, separable Contact
means, electromagnetic means for separating said
contacts, means for automatically reclosing said
contacts in response to a circuit interrupting op
eration, means having a part biased to move in
response to a circuit interrupting operation to one
position for preventing separation of said contacts
Certain ci 'the features of this invention not 75 under the influenceA of - said electromagnetic
2,405,606
13
means, and timing means responsive to operation
of said contacts for moving said part away from
14
ing separation of said contacts by said contact
controlling means, time delay means also respon
sive to said predetermined circuit conditions for
said one position a predetermined time after re
rendering said last mentioned means ineffective
closure of said contacts.
5. In a circuit interrupter, separable contacts, Ul a predetermined time after a first circuit inter
rupting operation in the event said predeter
relatively quick acting means for separating said
mined conditions remain on the circuit, and
contacts in response to a predetermined circuit
means resetting said contact separation prevent
condition, means for automatically closing said
ing means in the event said predetermined con
contacts in response to a circuit interrupting
operation, movable stop means adapted to move 10 ditions are removed from the circuit.
10. In a circuit interruptor, separable contacts,
in response to operation of said contact closing
means for separating said contacts in response
means to a position to prevent operation of said
quick acting means to open said contacts, and
time delay means for maintaining said stop
means in said position a predetermined time in
terval.
6. In a circuit interrupter, separable contacts,
relatively quick acting means for separating said
contacts in response to a predetermined circuit
condition, means for automatically closing said
contacts in response t0 a circuit interrupting
operation, movable stop means adapted to move
to a predetermined circuit condition, means for
automatically closing said contacts in response
to a circuit interrupting operation, means for
delaying closing movement of said co-ntacts in
cluding an actuating member adapted to be ad
vanced a predetermined amount by each oper
ation of said reclosing means, means responsive
to predetermined advancement of said actuating
member for preventing reclosure cf said contacts,
movable stop means movable in response to ad
vancement of said member for preventing oper
in response to operation of said contact closing
ation of said contact separating means to open
means to a position to prevent operation of said
quick acting means to open said contacts, and 25 said contacts, and means for slowly returning
said member to its original position to restore
time delay means responsive to a condition of
said stop means to its original position a pre
said circuit formaintaining said stop means in
determined time aiter advancement of said
said position a predetermined-time interval.
member.
'7. In a circuit interrupter, separable contacts,
il. In a circuit interruptor, separable contacts,
means for separating said contacts in response to
means for separating said contacts in response
a' predetermined circuit condition, means for
to a predetermined circuit condition, means for
automatically closing said contacts in response
automatically closing said contacts iin response
to a circuit interrupting operation, means for
to a circuit interrupting operation, means for
delaying closing movement of said contacts in
delaying closing movement of said contacts in
cluding an actuating member adapted to be ad
cluding an actuating member adapted to» be ad
vanced a predetermined amount by each oper
vanced a predetermined amount by each oper
ation of said reclosing means, movable stop
ation of said reclosing means, a stop member
means movable in response to advancement of
pivotally mounted on a movable support and
said member to one position for preventing oper
biased for movement relative to said support
ation of said contact separating means to open
to an» active position but normally held in an
said contacts, means for slowly returning said
inactive position by said actuating member, a
member to its original position to restore said
part movable with said contact separating means
stop means to its original lposition a predeter
engageable with said stop member in its active
mined time after advancement of said member,
position in a manner to bias said support for‘
and time delay means responsive to a condition
movement upon an attempt by said contact sep
of said circuit also eifective to restore said stop
arating means to separate said contacts, and
means vto its original position.
time delay means responsive to said predeter
8. In a circuit interrupter, separable contacts,
mined circuît condition for permitting move
means for separating said contacts in response
to a predetermined circuit condition, means for 50 ment of said support and allowing separation of
said contacts.
automatically closing said contacts in response
12. In circuit interrupting means, separable
to a circuit interrupting operation, means for
contacts, a single means responsive to a prede
delaying closing movement of said contacts in
termined circuit condition controlling separation
cluding an actuating member adapted to be ad
vanced a predetermined amount by each oper 55 of said contacts comprising a relatively quick
acting control device, means for automatically
ation of said reclosing means, means for releas
closing said contacts following acircuit inter
ably holding said contacts separated, said last
rupting operation, blocking means automatically
mentioned means adapted to be actuated by said
eiîective in response to a circuit interrupting
actuating member after it has been advanced a
predetermined amount, movable stop means mov 60 operation for preventing operation of said control
device to separate said contacts, time delay means
able in response to advancement of said member
operative to render said blocking means ineffec
for preventing operation of said contact sep
tive to permit said control device to separate said
arating means to open said contacts, means for
contacts only a predetermined time after a first
slowly returning said member to its original posi
tion to restore said stop means to its original 65 circuit interrupting operation, whereby Iupon the
occurrence of said predetermined condition said
position a predetermined time after advancement
control device will cause a quick separation of
of said member, and time delay means respon
said contacts and thereafter said contacts will
sive to a condition of said circuit also effective
automatically reclose, and if said predetermined
to restore said stop to its original position.
9. In circuit interrupting means, separable 70 condition still exists said contacts will be sep
arated a second time by said control device only
contacts, means controlling separation of said
a predetermined time after the first circuit in
contacts including means for relatively quickly
terrupting operation, said closing means eiîecting
separating said contacts ín response to predeter
a second reclosure of said contacts after the Vsec
mined circuit conditions, means responsive to a
ond separation, and said time delay means effec
first circuit interrupting operation for prevent
15
2,405,606
tive to maintain said blocking means ineffective
at least a predetermined time after said second
reclosure, whereby if said predetermined condi
tion still exists the third successive separation of
said contacts will be eiîected quickly like the iirst
separation.
13. In circuit interrupting means, separable
contacts, a single means responsive to a prede
termined circuit condition controlling separation
of said contacts comprising a relatively quick act
ing control device, means for automatically clos
ing said contacts following a circuit interrupting
operation, blocking means automatically effec
tive in response to a circuit interrupting opera
16
16. In a circuit interrupter, separable contact
means, electromagnetic means for separating said
contacts, means for automatically reclosing said
contacts in response to a circuit interrupting op
eration, means biased t0 move in response to a
circuit interrupting operation to a position where
it .mechanically blocks a succeeding circuit in
terrupting operation of said electromagnetic
means, and time delay means responsive to op-
eration of said contacts for moving said blocking
means to a non-blocking position a predetermined
time after a first reclosure of said contacts.
17. In a circuit interrupter, separable contact
means, electromagnetic means for separating said
tion for preventing operation of said control de 15 contacts, means for automatically reclosing said
vice to separate said contacts, time delay means
contacts in response to a circuit interrupting op
operative to render said blocking means ineffec
eration, time delay means automatically me
tive to permit said control device to separate said
chanically engageable with said contact sepa
contacts only a predetermined time after a ñrst
rating means to delay an attempted closely suc
circuit interrupting operation, whereby upon the 20 cessive circuit interrupting operation for a pre
occurrence of said predetermined condition said
determined time following a, ñrst reclosure of said
control device will cause a quick separation of
contacts, and timing means responsive to reclo
said contacts and thereafter said contacts will
sure of said contacts for disengaging said time
automatically reclose, and if said predetermined
delay means after said predetermined time has
condition still exists said contacts will be sepa 25 expired Ito permit said electromagnetic means t0
rated a second time by said control device only
quickly separate said contacts at a later time.
a predetermined time after the iirst circuit inter
18. In circuit interrupting means, separable
rupting operation, said closing means effecting a
contacts, means «controlling separation of said
second reclosure of said contacts after the sec
contacts including relatively quick acting means
ond separation, said time delay means effective
for separating said contacts in response to pre
to maintain said blocking means ineffective at
determined conditions, means for automatically
least a predetermined time after said second re
reclosing said contacts in response to a circuit
closure, whereby if said predetermined condition
interrupting
operation, time delay means auto
still exists the third successive separation of said
matically engageable with said quick acting
contacts will lbe effected quickly like the first sep
means in response to a circuit interrupting opera
aration, and means responsive to said third sep
tion for delaying a closely succeeding circuit in
aration of said contacts to prevent reclo-sure
terrupting operation by said quick acting means
thereof.
for a predetermined time after reclosure of said
14. In circuit interrupting means, separable
contacts, means controlling sepa-ration of said 40 contacts in the event said predetermined condi
tions continue, second time delay means for de
contacts including relatively quick acting means
laying closure of said »contacts and adapted to be
for separating said contacts in response to pre
advanced a predetermined amount by closing
determined conditions, means for automatically
movement o1" said contacts, said second time delay
reclosing said contacts in response to a circuit
means normally maintaining said ñrst time delay
interrupting operation, time delay means auto
matically engageable with said quick acting 45 means disengaged from said quick acting means
but permitting said engagement when advanced.
means in response to a circuit interrupting oper
i9. In circuit interrupting means, separable
ation for delaying a closely succeeding circuit in
contacts,
means controlling separation of said
terrupting operation -by said quick acting means
contacts including relatively quick acting means
for a predetermined time after reclosure of said
contacts in the event said predetermined condi-Ä 50 for separating said contacts in response `‘to pre
determined conditions, means for automatically
tions continue, and a second time delay means
reclosing said contacts in response to a circuit
responsive to a first circuit interrupting opera
interrupting operation, time delay means auto
tion to cause disengagement of said ñrst time
matically engageable with said quick acting
delay means and quick acting means a predeter
means in response to a circuit interrupting oper
mined longer time thereafter so that if said pre
ation for delaying a closely succeeding circuit in
determined conditions are not present upon re
terrupting operation by said quick acting means
closure of said contacts, said contacts will be
for a predetermined time after reclosure of said
quickly separated if said conditions appear at a
contacts in the event said predetermined condi
later time.
15. In circuit interrupting means, separable 60 tions continue, second time delay means for de
laying closure of said contacts and adapted to be
contacts, means controlling separation of said
advanced a predetermined amount by closing
contacts including means for relatively quickly
movement of said contacts, said second time de
separating said contacts in response to prede
lay means normally maintaining said iirst time
termined circuit conditions, means responsive to
a circuit interrupting operation to automatically 65 delay means disengaged from said quick acting
means but permitting said engagement when ad
reclose said contacts, means responsive to a iirst
circuit interrupting operation for preventing sep
vanced, and means biasing said second time delay
means to reset the same a predetermined time
aration of said contacts by said contact control
after an advancement thereof.
ling means, time delay means also responsive to
20. In circuit interrupting means, separable
70
said predetermined circuit conditions for render
contacts, means controlling separation of said
ing said last-mentioned means ineffective a pre
contacts including relatively quick acting means
determined time after reclosure of said contacts
for separating said contacts in response to pre
in the event said predetermined conditions re
determined
conditions, means for automatically
main on the circuit.
75 reclosing said contacts in response to a circuit
2,405,606
17
interrupting operation, time delay means auto
matically engageable with said quick acting
means in response to a circuit interruptingoper
ation for delaying a closely succeeding circuit in
terrupting operation by said quick acting means
for a. predetermined time after reclosure of said
contacts in the event said predetermined condi
tions continue, second time delay means for de
laying closure of said contacts and adapted to be
18
ing operation by said quick acting means for a
predetermined time after reclosul'e of said con
tacts in trie event said predetermined conditions
continue, >second time delayv means adapted to
be advanced a predetermined amount ‘by ciosmg
movement oi' said contacts, said second time de
lay means normally maintaining said iii‘st time
delay means disengaged Irom said quick acting
means but permitting said engagement Wnen
advanced a predetermined amount by closing 10 advanced, and normally inactive means for
maintaining-said contacts separated naving a
movement of said contacts, said second ‘time delay
means normally maintaining said ñrst time delay
means disengaged from said quick actingmeans
` pal-t positioned to. be engaged by a part advanced
by advancement oi said second time delay means
but permitting said engagement when advanced,
to >render said‘normaily inactive means active
means biasing said second time delay means to 15 to maintain said contacts separated in response
reset the same a predetermined time after an
to a predetermined-number oi' successive circuit
advancement thereof, and normally inactive
interrupting operations.
means for maintaining said contacts separated
ze. ln a circuit interrupter, separable contact
means, electromagnetic means lor separating
having a part positioned t0 be engaged by a part
advanced by advancement of said second time 20 said contacts, means Ior automatically reclosing
said contacts in response to a circuit interrupting
delay means to render said normally inactive
means active to maintain said contacts separated
in responseto a predetermined number of suc
operation, latcli means movable in response to a
first circuit' interrupting operation to a position
cessive circuit interrupting operations.
preventing a second - succeeding separation of
21. In circuit interrupting means, separable 25 said contacts by vsaid’electromagnetic means, a
contacts, means controlling separation of said
bimetal controlled latch element maintaining said
contacts including relatively quick acting means
latcn means in saidposition, and said blinetal
forA separating said contacts in response to pre
latcn element I'being responsive to predetermined
determined conditions, means for automatically
circuit conditions-to release said laten means and
reclosingsaid contacts in response to a circuit in 80 permit said electromagnetic means to again sepa
terrupting operation, time delay means automati
rate said contacts.
’
cally engageable with said quick acting means in
25. In a circuit interrupter, separable contacts,
response to a, circuit interrupting operation for
electromagnetic and Ibimetallic means responsive
delaying a closely succeeding circuit interrupting
to predetermined circuit conditions I‘or control
operation by said quick acting means for a pre $5 ling separatlon of said contacts, means automati
determined time aftei- reclosure of said contacts
cally ciosmg said contacts in response to a circuit
in the event said predetermined conditions con
interrupting operation, means normally prevent
tinue, second time delay means adapted to be ad
ing control 0I' contact separation by said bi
vanced a predetermined amount by closing move
metallic means, and means responsive to a first
ment of said contacts, said second time delay 40 circuit interrupting operation under the control
means normally maintaining said first time delay
of said electromagnetic means for rendering said
means disengaged from said quick acting means
bimetallic means operative to control a second
but permitting said engagement when advanced.
circuit interrupting operation.
v22. In circuit I interrupting means, separable
26. In a circuit interrupter, separable contacts,
contacts, means controllingv separation of said 45 electromagnetic and 1oimetallic means responsive
contacts including relatively quick acting means
to predetermined/circuit conditions for control
for separating said contacts in response to pre
ling separation of said contacts, means automati
determined conditions, means for automaticallyv
cally closing said contacts in response to a circuit
reclosing said contacts inY response to a circuit
interrupting operation,`time delay means auto
matically engageable with said quick acting'.l
means inresponse to a circuit interrupting opera
tioii for delaying a closely succeeding circuit in
terrupting operation by said quick acting means
for a ypredetermined time after reclosure of said
interrupting operation, means normally prevent
' ing control of contact separation by said lbime
tallic means, means responsive to a first circuit
interrupting operationunder the control of said
electromagnetic means i'or rendering said bi
metallic means operative to control a second cir
cuit interrupting operatiOn, said bimetallic means
contacts in the event said predetermined condi
deflecting to a non-controlling position when re
tions‘continue, second time delay means adapted
sponding
to said predetermined conditions,
tobe advanced a predetermined amount by clos
whereby avthird successive circuit interrupting>
ing-movement of Ísaid contacts, said second time
delay means normally maintaining said first time 60 operation will be controlled by said electromag
netic means.’
delay means disengaged from said quick acting
27. In a circuit interrupter, separable contacts,
means but permitting said engagement when ad
electromagnetic and bimetallic means responsive
vanced, and means biasing said second timedelay
means to reset thev saine- a predetermined .time
to» predetermined circuit conditions for control
after an advancement thereof.
Y
ling separation of said contacts, means automati
`23. In circuit interrupting means, separableV
cally closing said contacts in response to a circuit
contacts, means controlling separation of said
interrupting'operation, means normally prevent
contacts including relatively quick acting means
ing control of contact separation by said bime
for separating said contacts in response to pre
tallic means, means responsive to a first circuit
determined conditions, means for automatically 70 interrupting operationV under the control of said
reclosing said contacts in response to acircuit in‘
electromagnetic means for rendering said bi
terrupting operation, vtime delay means automati
metallic means operativetocontrol a second cir
cally engageable with said quick acting means in
cuit interrupting operation, and time delay means
response to a circuit interrupting 'operation for . responsive to said iirst circuit interrupting oper
delaying a. closely succeeding circuit interrupt
ation for restoring said bimetallic means to its
faaio'sgooo
'20
normal condition iagpredeterminegd timaafter "re
closure of saidicontacts.
and lfirieans¿for ¿automatically :resetting fsaid :b1
,
metallic; means ítoiitszinactive condition =falprede
termined itimegsafter .la : ñrst .circuit A¿interrupting
A2,8.„In `~a Í_circuit interruptor, Aseparable ¿con
tactaslidably mountedecontact actuatingimeans,
operation-soithat.in_.tlieeventsthasltcceedingicir
electromagnetic ~„means Lresponsive to .predeter
rnined circuìtconditions :for.=mov;ing saicLactu
CII
cuit;interruptingxroperatíon doesinot ‘nloselyïsuc
ceed the iirstzit .will :not .beiïdelayedflbycsaid bi
ating ,means Y in (a _ direction ..to,.sep.arate„saidy con
>metallic , means.
tacts, means 4Vfor V=.antomatically `rec1osing¿_sai.d
¿32. fInfa .'ci-rcuit; interrupteigtseparable contacts,
contactsinresponse to_acircuitinterruptingoper,
electromagnetic :means „responsive :to ‘predeter
ation,l a stop lug son said r`actuating„meanscaipiv
mined.circuitconditicnsion separating saidron
oted ilatolc biased „for movement _to aposition in
the ~pattiof.movement:pìsaid„lug to ,prevent sep
aratioii .of said .contacts .by >said Lelectromagnetic
.means normally-»maintaining saidlatch
tants, means .'automatically,„closing ¿said -contacts
in ¿response sto. a-.;círcuit îinterrupting operation,
normally inactive gtbimetallic zmeans, ¿means .ire
sponsive „toga?rst ¿circuit `interrupting. operation
out 'de the natirofnlovcment ofesaidtluasaid
to render said T_bime'tallic vmeans :capable i of .'_prïe
last-.mentionedmeans .beinaresnonsive .tota cir.
cuit interrupting operation to :.pcrmitmovement
of .said ,latch to said ,position
Y
venting :a ¿closely succeeding :contact ¿separating
operation byisaidœleotromagneticJmeansgsaid "bi
metallic ameansiat least @when îpreventing ¿contact
separation ,being ¿also responsive 'to ‘,said 'prede
termined ¿circuit ¿conditions :to ïpermit saidelec»
„2.9.- _In `acircuitinterruptor,,separable_contacts
siidably mounted „Contact actuating -meansnelee
tromasnetio means responsive @predetermined
circuit 4ooeditions 4for Yraming _said .actuating
tromagnetic ¿means .to k,.eilîect :a :succeeding ¿circuit
interrupting xoperation, vwlfiere'by ¿such :succeeding
circuit :interrupting ¿operation will ¿be delayed Jia
predetermined _time by `said Lbimetallic ïm'eans,
means in `a „direc ` I1'to.separatetsaid„contacts
meaiisifQlîalitoma
,llyreolosinssaid contactsin
response to ,a ci
t ,interdiction operation, Aa
f and said bimetallic >¿means deñecting íto ¿an Lin
Stop logon,saidactoatiname ,_ariyoted1atcn
biased .f o1' `iciovemerit ,to position _in „the _nath pf
movement „of Said .his .to _prevent separation „o_f
Said contacts by _said electromagnetic means,
active :position >~when ¿responding ¿to :said api-‘ede
` termined conditions, Aso `that `said electromagnetic
means may eirect aitbird. circuit-,interrupting op
eration without delay.
A3.3. :Theî combination of acircuitibreakermver
loaderesponsiveimcans ior..'automatically »and 1in
stanztatneously :opening :the :,breaker, kmeans Yre
means normally maintaining .said ,laten ,outside
the path of movement of said lngsaid last-„men
tioned means ¿beifis .responsive to .circnitinter
factice operation `to .ne mit .movement .of „said
latch to vsaid position, `a libirrietal `contraireed ,latch
member for maintaining ,said rivoted latch at
sponsive v¿to ¿an icpening ,fof tthe ¿breaker r for - auto
matically reclosing ithelzbreaker, ìauxilia'ry imeans
for directly 4r,restraining .a further automatic
opening by ¿said `¿overload-responsive Lmeans ’ttor
said positie s, and .said loirrietal latcbresponsive „to
_predetermined
a :predetermined Jtime :interval in 'response y¿to V'a
circuit conditions _to release `said pivote@ latch
and Dermit Said electromagnetic means to ,again
the'continliedrexistence o_f
’ predetermined freclosing voperation, fand fm'eans
separate said contacts,
ì
for `removinfgmsaid restraint »after »said-‘time‘ïint'er
4,0 val.
>30. In a circuit interruptor, .Sêpal‘able rcon
tacts, (electromagnetic means responsive Át‘o/prïe
determined circuit conditions vfor 7separating L_said
contacts, means automatically closing said con
tacts in response to a circuit `interr-upting¿opera
tio'n, normally inactive bimetallic means, means
responsive to' a iirstcircuit interrupting opera
tion'to render said'bimetallic means capableof
preventing a closelyV succeeding> contact separat
ing operation'by said `el'ectromagnetic means,_and- «
said bimetallic means at least when ‘preventing
contact separation being also responsive tol-said
predetermined' circuit conditions to kpermit said
electromagnetic means to elicot a succeeding cirF
cui-t interrupting operation, whereby such suc
ceeding circuit interrupting operation will be de
:34. In ,ani-automatic reclosi-ng circuit lbreaker,
separable contacts, a »single means Ifor ycausing
separation ,-,oîf v»said contacts «to open 'the circuit,
said «contact »separating means being responsive
to ~-a predetermined circuit-'condition 1for `c‘a‘usin'g
a relatively -quick Aseparation or 'said contacts,
means responsive to acircuit interrupting opera
tion to automatically close ‘said contacts,v .and
means automatically responsive ‘to a .predeter
mined circuit opening ari'd reclos'ing operatio'riî'for
delaying ‘themext' succeeding circuitA opening .op
eration iiy said contact separating means -for ,a
predetermined >time after .the circuit .is `closed ,so
that4 if said condition still exists _said .next .open
ing'of the Circuit will be delayed.
'
`
means.v
’ ’3.5, vIn a circuit interrupter, `separable vcontact
means electromagnetic means vfor causing ysepa- V
31. In a vcircuit interruptor, separable contacts,
electromagnetic means »responsive to predeter
ration of said contacts, means for automatically
reclosing said .contacts .in response to `a circuit
mined circuit conditions for separating ~said con
interrupting operation, normally inactive time
layed a predetermined time by said bimetallic
taots, means automatically closing said contacts
delay means, means .responsive to a. Vpredeter
in response to .a circuit interrupting operation,
normally inactive bimetallic means, means ¿re
mined circuit interruptingoperation for render
ing .said time `delay means‘active .to control move
ment of said electromagnetic meansèand thereby
delay an «attempted closely successive l.circuit fin
sponsive to a liìrst circuit interrupting operation
to _render said bimetallic means capable of pre
venting a closely ysucceeding »contact ,separating
operation by said electromagnetic means, said
terrupting voperation atleast for aïpredctermined
time .following a ñrst 'reclosure of .Said contacts.
bimetallic means at least when` preventing _con
36. The combination of acircuit breaker, over
tact separation'being also responsive to said pre 70 load-responsive means for automatically and kin
determined circuit conditions to permit said elec
stantaneously opening the breaker, means ' re
tromagnetic means to effect a succeeding circuit
sponsive to an opening of the breaker for auto»
interrupting operation, whereby such succeeding
circuit interrupting operation will be delayed a
predetermined time by said Lbimetallic means.
matically reclosing the breaker, auxiliary means
for directly restraining a -further >automatic
lopening by said overload-responsive means >for
2,405,606
21
a predetermined time interval in response to a
22
39. In a circuit interrupter, separable contact
means, electromagnetic means for causing sepa
means, electromagnetic means for causing sepa
ration of said contacts, means for automatically
reclosing said contacts in response to -a circuit
ration of said contacts, means for automatically
interrupting operation, time delay means, in
reclosing said contacts in response to a circuit
tegrating means ladapted .to be advanced a pre
determined amount in response to a circuit open
vpredetermined reclosing operation.
37. In a circuit interrupter, separable contact
interrupting operation, time delay means, means
responsive to a predetermined circuit opening
ing and reclosing operation of said interrupter,
means responsive to advancement of said in
tegrating means a predetermined amount to
render said time delay means eiîective to delay
movement of said electromagnetic means and
an attempted successive circuit interrupting op
thereby delay an attempted successive circuit
peration, and said last mentioned means being
interrupting operation, said integrating means
biased to slowly return to a position at which
being biased -to return to a position wherein said
said time delay means is rendered ineñîective to
time delay means is inactive, second time delay
delay movement of said electromagnetic means,
means for delaying return movement of said in
whereby movement of said electromagnetic
tegrating means, whereby movement of said elec
means Will be delayed by said time delay means
tromagnetic means will be delayed by said time
only in the event said electromagnetic means
attempts to interrupt the circuit Within a pre 20 delay means only in the event said electromag
netic means attempts to interrupt the circuit
determined .time following said predetermined
Within a predetermined time following said pre
opening and reclosing operation.
determined opening and reclosing operation, and
38. In a circuit interrupter, separable contact
means responsive .to a predetermined greater
means, electromagnetic means for causing sep
advancement of said integrating means to pre
aration of said contacts, means for automatically
vent reclosing of said contacts.
reclosing said contacts in response to a circuit
40. In a circuit interrupter, separable contact
interrupting operation, time delay means, means
means, electromagnetic means for causing sepa
adapted to be advanced a predetermined amount
ration of said contacts, means for automatically
in response to a circuit opening and reclosing
reclosing said contacts in response to a circuit
operation of said interrupter, means responsive
interrupting operation, time delay means, sec
to advancement of said operation responsive
ond time delay means for delaying reclosing
means a predetermined amount to _render said
movement of said contacts and having an ele
time delay means eiîective to delay movement of
ment adapted to be advanced a predetermined
said electromagnetic means and thereby delay
amount in response to a circuit reclosing opera
an attempted successive circuit interrupting op
tion of said interrupter, means responsive to ad
eration,~ said operation responsive means being
vancement of said element a predetermined
biased to return to a position wherein said time
amount to render said iirst mentioned time de
delay means is inactive, and second time delay
lay means eiîective to delay movement of said
means for delaying return movement of said
operation responsive means, whereby movement 40 electromagnetic means and thereby delay an at
tempted successive circuit interrupting opera
of said electromagnetic means will be delayed
tion.
-»
by said time delay means only in the event said
HERBERT L. RAWL'INS.
electromagnetic means attempts to interrupt the
JAMES M. WALLACE.
circuit Within a predetermined time following
and closing of said interrupter to render said
time delay means effective to delay movement of
said electromagnetic means and thereby delay
said predetermined opening and reclosing opera 45
tion.
Документ
Категория
Без категории
Просмотров
0
Размер файла
2 189 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа