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Патент USA US3086108

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April 16, 1963
v. DELEVOY ETAL
CIRCUIT INTERRUPTER
Filed March 4, 1960
38
3,086,098
United States Patent O?lice
1
3,086,098
Patented Apr. 16, 1963
2
contact arm 12 is a movable arcing contact 15, which
3,086,098
CHKCUIT INTERRUPTER
Victor Delevoy, Grivegnee, and Fernand Cassalette,
Liege, Belgium, assignors to Ateliers de (lonstructiens
Electrigues de Charleroi, Charleroi, Belgium, a corpo
ration of Belgium
Filed Mar. 4, 1960, Ser. No. 12,753
Claims priority, application France Mar. 11), 1959
11 Claims. (Cl. 209-444)
makes contacting engagement, in the closed-circuit posi
tion, with a relatively stationary arcing contact 16, the
latter constituting a component part of the removable
arc-chute device 3. As shown in FIG. 1, the molded
circuit breaker base support 2 preferably has integrally
molded therewith side Wall portions 17 and a front inter
connecting, integrally-formed wall portion 18.
Prefer
ably the side walls 17 have support studs 19, 20 molded
10 therewith during the molding process.
This invention relates to circuit interrupters in general,
The function of the support studs 19, 20‘ is to enable
and more particularly to arc-extinguishing structures
the attachment of the circuit-interrupter base 2 to a lower
therefor.
disposed control base, or mechanism compartment 21,
A general object of the present invention is to provide
as shown in FIGURE 1.
an improved and highly ef?cient circuit interrupter, par 15
As set forth more particularly in our eopending patent
ticularly one of the magnetic blowout type, in which the
application, Serial No. 12,752, the integrally molded side
number of component parts, and the assembly time dur
walls 17 of the base 2 are interconnected at their lower
ing manufacture may be drastically reduced.
extremity by a base plate, which forms an operating cylin
Another object of the present invention is to provide
der 22, constituting a part of a puller device 23, which,
an improved magnetic circuit interrupter having a remov 20 as Well known by those skilled in the art, enables the gen
able arc-chute device, thereby enabling a ready inspection
eration of a blast of gas during operation of the circuit
of the contact structure, and possibly the substitution of a
interrupter through an ejector nozzle 24 and into the arc
new arc-chute device when the old one has deteriorated
stream. The ejector nozzle 24 is pneumatically con
following long use.
,
nected with the operating cylinder 22 by an insulating
Still another object of the present invention is the pro 25 conduit 25. As a result, during opening of the circuit
vision of an improved circuit interrupter having a novel
interrupter 1 a piston, not shown, movable upwardly
circuit-interrupter base with ?rst and second blowout
within the operating cylinder 22, is effective to force a
coil detachable connection means disposed adjacent oppo
blast of compressed gas upwardly through the connecting
site ends thereof together with the removable arc-chute
pipe 25 and through the nozzle 24 to be forced into the
device having a pair of blowout coils associated therewith 30 arc stream to assist in arc extinction.
and constituting component parts thereof.
As shown in FIGURE 1, a ?rst detachable blowout
Still a further object of the present invention is the pro
coil connection means 26 includes a conductor stud 27,
vision of an improved circuit interrupter having a re
which is preferably molded integrally with the front Wall
movable arc-chute device, in which a generally rectan
18 during the molding process. The lower end of the
gularly-shaped molded arc-chute housing is employed 35 conductor stud 27 is electrically connected to the mov
having arc-extinguishing means disposed therewithin and
able contact arm 12, as shown more clearly in our co
also having, as a component part thereof, a relatively
pending patent application Serial No. 12,752.
stationary arcing contact.
The upper end of the conductor stud 27 forms a jack,
Further objects and advantages will readily become
or plug 28, which is received by a receptacle, or socket
apparent upon reading the following speci?cation, taken 40 29, the latter constituting a component part of the remov
in conjunction with the drawing, in which:
FIGURE 1 is a side elevational view, partially in ver
tical section, of a magnetic-type circuit interrupter em
able arc-chute device 3.
It will be noted that the recep
tacle 29 is electrically connected, by a connector 30,
to a ?rst blowout coil 31, having a pair of pole plates
bodying the principles of the present invention, with the 45 32 which straddle and clampingly engage a molded, gen
contact structure being illustrated in the open-circuit po
erally rectangularly-shap-ed arc-chute housing, generally
sition.
designated by the reference numeral 33. The molded
Referring to the drawing, and more particularly to
arc-chute housing 33 is preferably molded from a suitable
epoxy resin base material.
FlGURE 1 thereof, the reference numeral 1 generally
designates a magnetic-type of circuit interrupter. It will 50 As shown in FIGURE 1, suitable ‘arc-extinguishing
means 34 are disposed interiorly within the generally
be noted that generally, the circuit interrupter 1 includes
a molded base support, generally designated by the refer
rectangularly-shaped molded arc-chute housing 33. The
arc-extinguishing means 34 may comprise a plurality of
ence numeral 2, and a removable and detachable arc
insulating plate portions, or other suitable arc-extinguish
chute device, generally designated by the reference nu
meral 3. Certain features of the molded base support 55 ing devices. The present invention is not limited to any
particular form of arc-extinguishing means 34, as will
2 are set forth more particularly and claimed in our con
be obvious from the description of the invention.
currently tiled patent application Serial No. 12,752, and
assigned to the assignee of the instant application.
Disposed adjacent opposite ends of the generally rec
The molded base support 2 generally is molded or cast
tangularly-shaped removable arc-chute device 3 is a pair
of an epoxy resin base material. A side wall 4 has in 60 of arcing horns 35, 36. As shown, the arcing born 35
sulating shroud projections 5, 6, which are perforated,
may be attached, by bolts 37, to the end wall 38 of the
as at 7, and have projecting therethrough terminal studs
molded arc-chute housing 33. Suitable means, not shown,
electrically connect the arcing born 35 with the first
8 and 9. At the interior end of the upper terminal stud
8 is a relatively stationary main contact structure 10.
blowout coil 31.
Disposed at the inner end of the lower terminal stud 65
A second blowout coil 39, having pole plates 40, is also
9 is a pivotal support, not shown, which pivotally sup
associated with the removable arc-chute device 3 and
ports a rotatable contact arm, generally designated by the
constitutes a component part thereof. The pole plates 40
reference numeral 12. As shown, the rotatable contact
clamp to the housing 33. As shown, one end of the sec
arm 12 carries a movable main contact 13, which cooper
ond blowout coil 39 is electrically connected to a plug 41
ates with main contacts 14 associated with the relatively 70 which engages spring ?ngers 42, the latter being electri
stationary main contact structure 10'.
cally connected with the relatively stationary main con
Also carried at the outer free extremity of rotatable
tact structure 10. A positioning pin 43 constitutes a part
8,086,098
It
3
of a positioning means 44>, which ensures the precise posi
tioning of the relatively stationary arcing contact 16, the
insulating part, which has very precise dimensions and
latter constituting a component part of the removable arc
tionary main contact structure 1%.
chute device 3. Preferably, the upper end of the molded
arc-chute base 2 has recesses @547 to enable the nesting
therewithin of the removable arc-chute device 3.
The nestin0r within the circuit-breaker support 2 of
the removable arc~chute device 3 has been made prac
As will be obvious, in the closed-circuit position of the
arcing contact 16 is a component part of the removable
arc-chute device 3, and is precisely maintained in proper
device 1 with the main movable contact 13 making en
is a component part of the assembly of relatively sta
tically feasible by the fact that the relatively stationary
gagement with the relatively stationary main contact 14,
the circuit extends through the circuit interrupter l and
merely includes the terminal studs 8, 9, contact arm 12
and contacts 13, 14.
position by the positioning means 44.
From the foregoing description it Will be apparent that
there is provided an improved circuit-interrupting struc—
During the opening operation, the rotatable contact
taining a pair of spaced blowout coils 31, 39, may be
readily removed from the circuit~breaker base support 2
arm 12 is rotated in a counter-clockwise direction, as
ture 1 in which a removable arc-chute device 3, con
viewed in FIGURE 1, about its pivotal mounting at the 15 enabling thereby inspection of the contact structures 10,
12.. The parts ‘involved are few in number and the as
interior end of terminal stud 9. This will ?rst separate
sembly operations are readily achieved.
the main contacts 13, 14, the arcing contacts 15, 16 re
maining in engagement. Upon the subsequent separation
of the arcing contacts l5, 16, the established arc will be
lengthened, and Will transfer to the arcing horns 35, 36.
As will be obvious, the electrical circuit now passes
through the upper terminal stud 8, stationary contact
structure 16*, ?exible ?ngers 42., jack 41, second blowout
coil 39, a connection not shown leading to arcing horn
36, the arc itself within arc-chute 3, left-hand arcing
horn 35, ?rst blowout coil 31, connector '59, receptacle
29, plug 28, conductor stud 27, and connection 4&8 to the
movable contact arm 12.
Although there has been shown and described a spe
ci?c structure, it is to be clearly understood that the same
was merely for the purpose of illustration, and that
changes and modi?cations may ‘readily be made therein
by those skilled in the art without departing from the
spirit and scope of the invention.
We claim as our invention:
1. A circuit interrupter including a base support, a
relatively stationary main contact structure including a
positioning means and a cooperable movable contact
structure supported upon said base support, the movable
contact
The are drawn between the arcing horns 35, 36 will be
extinguished by the ‘functioning of the extinguishing means 30 tionary
34, the blowout coils assisting in upward movement of the
an are,
are into the plate portions Ell.
cluding
It will be seen that it is of a distinct advantage to have
the arc-chute housing 33 formed as a molded piece or
casting having component parts, such as the blowout
co-ils 31, 59 and pole plates 32, did secured thereto. The
removable arc-chute device 3, hence includes not only
the housing 33, but also the blowout coils 31, 39, ex
tinguishing means 34, arcing horns 35, 36 and, most im
portantly, the relatively stationary arcing contact ‘16,
which is precisely maintained in its proper position by
the positioning pin 43. The positioning pin 43 constitutes
a part of the assembly of the relatively stationary main
contact 10, and hence may be accurately located.
By having the base support 2 of a single molded piece,
and by also having the rectangularly-shaped arc-chute
housing 33 also composed of a single molded piece the
structure being separable from the relatively sta
main contact structure to establish and lengthen
means for extinguishing said established arc in
a removable arc-chute device attachable and de
tachable to said base support, and the removable arc
chute device including a relatively stationary arcing con
tact having a mating positioning means to which one end
of the are transfers from the relatively stationary main
contact structure.
2. The circuit interrupter according to claim 1, where
in said positioning means associated with the relatively
stationary main contact structure includes a positioning
pin for ensuring a precise positioning of the relatively sta
tionary arcing contact.
3. The circuit interrupter according to claim 1, where
in said removable arc-chute device includes a unitary,
one-piece, generally rectangular insulating housing hav
ing a magnetic blowout coil disposed externally thereof.
4. The combination in a magnetic air-break circuit
interrupter of a circuit-interrupter base, a relatively sta
tionary main contact structure and a cooperable movable
joints which could permit lateral leakage of the arc gases 50 contact structure supported upon said base and separable
established arc is drawn and extinguished within a chim
ney or ?ue space 50, where there are no lateral slots, or
to adjacent phases.
It will be noted that the jack 26 and the contact fingers
to establish and lengthen an arc, a positioning means
constituting a part of the relatively stationary main con
42 provide a connection means whereby current is ‘fed
tact structure, a removable arc-chute device attachable
to the two blowout coils 31, 39, the latter being an in
and detachable with respect to said base and including
tegral part of the assembly of the removable arc-chute 55 a relatively stationary arcing contact constituting one
device 3. When the arc-chute device 3 is assembled
component part thereof, a mating positioning means se
upon the circuit breaker base 2 the recesses 45447 permit
cured to said relatively stationary arcing contact to en
a proper nesting of the arc-chute device 3 into the upper
sure the precise positioning thereof relative to said rela
end of the molded base 2, and also the positioning pin 43
tively stationary main contact structure, and a pair of
ensures a precise positioning of the stationary arcing con 60 blowout coils disposed at opposite ends of the removable
tact 16, which is removable with the arc-chute device 3.
arc-chute device to effect lengthening and extinction of
As pointed out above, the ?rst blowout coil 31 is elec
said are.
trically connected on the one side with the arcing horn
5. The combination set forth in claim 4, wherein the
35, and on the other with the receptacle 29. The second
removable arc-chute device includes a generally rectangu
blowout coil 39, is electrically connected on the one side 65 lar one-piece molded housing and extinguishing means
with the relatively stationary arcing contact 16 (the lat
are disposed interiorly of the molded one-piece housing.
ter connected with arcing horn 36), and on the other
‘6. The combination in a magnetic air-break circuit in
side with a jack 41, which engages the spring ?ngers 4.2.
terrupter of a circuit-interrupter base, separable main
By the use of the positioning pin 43 the relatively sta
tionary arcing contact 16 is precisely maintained in its 70 contact means supported upon said base and separable to
establish and lengthen an are, a removable arc-chute de
proper position, so that in the closed-circuit position of
vice attachable and detachable with respect to said base
the interrupter 1 it will make proper engagement with
and including a relatively stationary arcing contact con
the movable arcing contact 15 carried by the rotatable
stituting one component part thereof, a pair of blowout
contact arm 12.
The positioning pin 43 may be integral with a molded 75 coils disposed at opposite ends of the removable arc
3,086,098
5
chute device to e?ect lengthening and extinction of said
are, and said base having ?rst and second detachable
blowout-coil connection means adjacent the opposite ends
thereof.
7. The combination set forth in claim 5, wherein a
pair of spaced arcing horns extend longitudinally within
said molded housing.
8. An air-brake circuit interrupter including a base, a
pair of substantially parallel-disposed terminal-bushing
6.
parts of the assembly thereof, ?rst and second blowout
coil connection means disposed adjacent opposite ends
of said base, the said ?rst blowout-coil connection means
being electrically connected to said other terminal-bush
ing structure, the second blowout-coil connection means
being electrically connected to said relatively stationary
main contact structure, a relatively stationary arcing con
tact constituting a component part of the removable arc
chute device, and said removable arc-chute device in
structures supported on said base, a rotatable contact arm 10 cluding a substantially rectangul-arly-shaped molded in
sulating arc-chute housing.
carrying a movable contact structure at the free end there
10. The air-break circuit interrupter according to claim
of pivotally supported at the inner end of ‘one terminal
9, wherein arc-extinguishing means are disposed interior
bushing structure, a relatively stationary main contact
ly Within said arc-chute housing, and spaced arcing horns
structure supported at the inner end of the other ter
are likewise disposed interiorly within said substantially
minal-bushing structure, a removable. arc-chute device
rectangularly-shaped molded arc-chute housing adjacent
attachable and detachable with respect to said base and
opposite ends thereof.
including a pair of blowout coils constituting component
11. The air-break circuit interrupter according to claim
parts of the assembly thereof, ?rst and second blowout
9, wherein positioning means associated with the rela
coil connection means disposed adjacent opposite ends
of said base, the said ?rst blowout-coil connection means 20 tively stationary main contact structure ensures a precise
positioning of said relatively stationary arcing contact rela
being electrically connected to said other terminal-bushing
tive to the relatively stationary main contact structure.
structure, the second blowout-coil connection means being
electrically connected to said relatively stationary
main contact structure, and a relatively stationary arcing
contact constituting a component part of the removable 25
arc-chute device.
‘9. An air-break circuit interrupter including a base, a
pair of substantially parallel-disposed terminal-bushing
structures supported on said base, a rotatable contact arm
carrying a- movable contact structure at the free end there 30
of pivotally supported at the inner end of one terminal
bushing structure, a relatively stationary main contact
structure supported at the inner end of the other ter
minal-bushing structure, a removable arc-chute device at
tachable and detachable with respect to said base and in 35
cluding a pair of blowout coils constituting component
References Cited in the ?le of this patent
UNITED STATES PATENTS
701,455
1,155,626
1,220,569
1,997,772
2,436,189
Zweigbergk __________ __ June 3, 1902
Steen _________________ __ Oct. 5, 1915
2,625,627
Grepe ____ __i _________ __ Jan. 13, 1953
2,847,540»
2,866,043
2,875,305
Pfeiffer et al __________ __ Aug. 12, 1958
Dickinson et al ________ __ Dec. 23, 1958
Latour et al ___________ __ Feb. 24-, 1959
Steen _______________ __ Mar. 27, 1917
Graves ______________ __ Apr. 16, 1935
Boehne ______________ __ Feb. 17, 1948
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