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Патент USA US2067648

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Jan. 12,1937.
C.REHER_
2,067,648
CIRCUIT BREAKER
Filed Dec. 18, 1934
4Sheets-Sheef 1
VleSYQi/_;
7
INVENTOR
Car/ kph/‘her.’
BY
'
Jan. 12, 1937.
2,067,648
c. REHER
CIRCUIT BREAKER
Filed Dec. 18, 1954
4 Sheets-Sheet 2
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WITNESSES:
INVENTOR
Car/ Eeher‘.
BY
ATTORNE
Jan. 12, 1937.
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c, REHER
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c I R C U I T BR EA K E R '
.
2,067,648
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Jan. 12, 1937.‘
'
‘
c. REHER
CIRCUIT
'Filed Dec. 18, 1934
-
209
2,067,648
BREAKER
4 Sheets-Sheet 4
2/3
_
INVENTOQ
Car/ Eehe?
BY
:'
ATTORN
'
Patented Jan. 12, 1937
2,067,648
UNITED STATES PATENT OFFICE
2,067,648
CIRCUIT BREAKER
Carl Reher, Berlin-Halensee, Germany, assignor
to Westinghouse Electric & Manufacturing
Company, East Pittsburgh, Pa., a corporation
of Pennsylvania
Application December 18, 1934, Serial No. 758,061
Germany December 23, 1933
12 Claims. (Cl. 200-148)
My invention relates to circuit interrupters ing directions of ?ow. This arrangement effects
and particularly to high capacity circuit break- ’ a much more e?icient intermixing of the arc
ers of the type which utilize a ?owing stream or extinguishing ?uid with the arc during each cir
jet of- arc extinguishing ?uid for extinguishing
5 the are formed incident tov the operation thereof.
As is well known in the art, there is a con
stantly increasing tendency on the part of elec
trical power companies to interconnect their dis
tribution systems into large networks. While
10 this practice eifects substantial operating econ-'
omies, it greatly complicates the problem of pro
viding satisfactory circuit interrupting devices
for usein these network systems. To adequately
protect the connected equipment and to assure
15 system stability, the breaker or other device must
be capable of interrupting very large amounts
of. power within extremely short intervals of time.
Despite this, however, large numbers of inter
rupters are required on even a small system, and
20 if any structure is to be commercially success
ful, it must be comparatively low in cost.
_
vention.
Another object of my invention is to provide
means for sorcontrolling the speed of ?ow in arc
extinguishing devices of the type discussed above
that the most ef?cient intermingling of the are 10
with the arc extinguishing ?uid shall be effected.
An ancillary object of my invention is to pro
vide a simple structure which may be readily
manufactured from inexpensive mechanical parts
for carrying out the above-mentioned objects.
The invention is applicable to are extinguish
ing devices which utilize an arc extinguishing
?uid in either the liquid or the gaseous state.
Likewise, ‘the invention is applicable to moderate
and low capacity circuit breakers as well as to
high capacity devices.
In the following description of certain preferred
state of the art the problem of providing satis
factory circuit breakers for the service has re
solved itself, primarily, into a study of means
for improving the arc extinguishing devices used
with these circuit breakers. The principal ob
ject of the present invention, therefore, is to pro
embodiments of my invention, I have pointed out
the manner in which the principles discussed
above may be applied to circuit breakers of both
the gaseous‘ and the liquid type. It is to be un
derstood, however, that no limitations in the
scope of the invention are intended thereby. Re
vide an improved arc extinguishing structure
which shall be less expensive to manufacture and
ferring particularly to the drawings:
viously known in the art.
The extensive studies made in the past of the
problem ofdarc extinction have indicated that
the most rapid and the most e?icient extinction
. of an electrical arc may be accomplished by sub
jecting that are to a blast or ?owing stream of
an arc extinguishing ?uid, having its direction
of flow ‘transverse to the normal axis of the arc.
40 It also appears from these studies that the de
gree of turbulence which is produced when the
stream of arc extinguishing gas contacts the arc
has a great influence upon the eiiiciency of the
resulting arc extinguishing operation.
In view of this, a further object of the present
invention is the provision of means for securing
increased turbulence, adjacent the arc‘ path, in
arc extinguishing devices which utilize a stream
or jet of arc extinguishing ?uid, ?owing trans~
50 versely to the normal axis of the arc, for effect
ing arc extinction. This object is accomplished
in the preferred embodiment of my invention,
through the provision of means for subjecting
the arc to a plurality of transversely ?owing
streams of arc extinguishing gas having di?er
5
v
Investigations have shown that in the present
. more e?icientin operation than the devices pre—
5
cuit opening operation, and thereby makes pos
sible the improved operation of the present in
Figure 1 is an end elevational view of a circuit
breaker utilizing an arc extinguishing device con
structed in accordance with the present invention.
Fig. 2 is an enlarged sectional View through
the arc extinguishing structure of the circuit
35
breaker shown in Fig. 1.
Fig. 3 is a sectional view on the line III--III
of Fig. 2.
.
Fig. 4 is a fragmentary elevational view of the
arc extinguishing structure illustrated particu
40
larly in Figs. 2 and 3.
Fig. 5 is a sectional, view through an are ex
tinguishing structure, constructed according to
the present invention, which is particularly de
signed for use with a liquid type circuit breaker.
Fig. 6 is a sectional view on the line VI—-VI 45
of Fig. 5.
‘
Figs. 7 through 10,‘ inclusive, are reduced plan
views of_ the various plate elements utilized in
building up the arc extinguishing devices illus
trated in Fig. 5.
~
Fig. 11 is a sectional view of a modi?ed form
of arc extinguishing structure somewhat similar
to that shown in Fig. 5.
Fig. 12 is a sectional view on the line XII—‘XII
of Fig. 11.
50
55
2
2,067,648
Fig. 13 is a sectional view on the line XIII
XIII of Fig. 11.
Fig. 14 is a reduced plan view of one of the
plate elements utilized in building up the are ex
tinguishing structures shown in Figs. 11 through
13.
a
‘
Fig. 15 is a fragmentary sectional view show
ing the relative position of the are and the sev
eral ?owing streams of arc extinguishing ?uid
10 in an arc extinguishing device similar to that
shown in Figs. 1 through 4.
Fig. 16 is a view similar to Fig. 15, illustrat
ing the e?ect of the ?owing streams of arc ex
tinguishing gas on the are during the progress
15 of the arc extinguishing operation. The view
illustrates conditions at a time subsequent to that
shown in Fig. 15.
Fig. 17 is a fragmentary view, similar to Figs.
15 and 16 showing the relative distribution of
20 the streams of arc extinguishing gas and the arc
in a circuit interrupting device similar to that
illustrated in Figs. 11, 12, and 13.
Fig. 18 is a sectional view, similar to Figs. 2 and
5, showing a third form of arc extinguishing
structure constructed according to my invention,
and
Figs. 19, 20, and 21 are sectional views taken,
respectively, on the lines XIX-XIX, XX-XX,
and XXI-XXI of Fig. 18.
While the various forms of arc extinguishing
structures illustrated in the drawings di?fer some
what in their structural details, each includes
a plurality of superposed plate members which
de?ne the walls of an arc passage, means for es
tablishing the arc incident to the opening of the
associated interrupter within that passage, a
quantity oi’ arc extinguishing ?uid, and means
ior causing the arc to be subjected to a plurality
of transversely ?owing streams of arc extinguish
which are provided with cooperating cut-out por
tions for de?ning the arc passage, the conduit
means for the arc extinguishing gas, and the ?ow
chambers. The plates are assembled on four in
sulating tie rods 23, the lower ends 01’ ‘which en- gage the cap member 25 cemented to the top of
the lower insulator 5. A hollow porcelain insu
lator 21, the upper end of which is closed by a
suitable cap 29, is provided for enclosing the arc
extinguishing structure so as to protect it from 10
the weather.
'
The lower element in the arc extinguishing
structure 1 comprises a substantially circular me
tallic plate 3| which has a suitable shoulder 33,
formed integral therewith, for engaging the cap 15
portion 25 of the lower insulator and four open
ings 35 formed therein for allowing the passage
of ‘the arc extinguishing gas into the conduit
passages 31 provided in the walls of the arc pas
sage. A suitable hollow contact 39 of the tulip 20
type is supported upon this lower plate member
3| for engaging the movable contact rod, and
the upper end of the insulating conduit 19 lead
ing from the arc extinguishing structure 1 to the
pressure cylinder l5 engages the only other open
ing (41) in the central portion of the cap mem
ber 25.
The next plate (43) in the arc extinguishing
structure 1 comprises a substantially circular
member of insulating material having four open 30
ings for engaging the tie rods 23, four openings
for de?ning a continuation of the conduit pas
sages 31 formed by the openings 35 in the lower
metal plate 3!, and a central opening 45 for ac
commodating the stationary contact 39. The re 35
maining portion of_ the structure, excepting the
top plate, comprises a stack of insulating plates
41, each of which is exactly similar in form. As
is shown‘ particularly in Fig. 3, each of these
ing ?uid during the circuit opening operation, at
plates 41 comprises a substantially circular mem
least some of these streams ?owing in different
her having four openings for engaging the tie
directions. In the several modi?cations disclosed,
the means for producing the transversely ?owing
streams of arc extinguishing gas in different di
rections includes a source of pressure, a common
conduit means extending through the walls of
the arc passage, and suitable ?ow chambers con
nectlng at one end with the conduit means and
extending transversely through the arc extin
guishing structure in? such manner that they in
clude the portion of the arc passage itself.
The circuit breaker illustrated in Fig. 1 in
cludes an L-shaped base i upon which are mount
ed suitable insulators 3 and 5, the lower insu
55 lator 5 serving to support the arc extinguishing
structure ‘I and the stationary contact means for
cooperating with the movable contact rod 9, and
the other insulator 3 serving to support the operl
ating mechanism II for the movable contact 9.
Suitable terminals 13 are provided for connect
ing the interrupter into an electrical circuit.
V
A pressure cylinder l5 which contains air or
some other are extinguishing gas.is supported
upon the base I by a strap member 11 or other
suitable means and is connected to the lower
end of the arc extinguishing structure 1 through
an insulating conduit l9, as is shown particularly
in Fig. 1.‘ In order to prevent waste of this gas.
an electromagnetic valve It is placed in the con
duit 19 intermediate of the pressure cylinder l5
and the arc extinguishing structure ‘I, this valve
being operated through the energization of suit
able means during each circuit opening operation.
The are extinguishing struct re 1 includes a
76 plurality of similarly shaped superposed plates
rods 23, three circular openings 49, disposed 90
degrees apart upon a common circumference for
defining the conduit passages 31, and a slot open
ing 51 which de?nes one of the ?ow chambers
in the assembled structure. The inner end of
each of these slots 5| has the same outline and
is positioned symmetrical with the three open
ings 49 which form the conduit passages 31 in
the assembled structure, in order that some 01' 0
the arc extinguishing gas may be caused to ?ow
through each of the ?ow chambers during each
circuit opening operation.
In building up the arc extinguishing struc
ture each of the superposed plates 41 is rotated 90
degrees with respect to the next lower plate. It
is immediately apparent that this arrangement
results in the provision of a device having four
cylindrical passages (the conduit passages 31)
extending longitudinally through the walls 01'
the arc extinguishing structure adjacent the arc
passage, and a plurality of transversely extend
ing ?ow chambers, positioned one above the other
and having their axes displaced by 90 degrees.
By making the plates 4'! symmetrical, each 01
the ?ow chambers connects at its inner end with
one'of the conduit passages 31. The upper plate
53 is solid except for a central opening 55 for
permitting the passage of the contact rod there
through and four openings for engaging the tie
rods 23. It thus serves to completely close the
upper end of each of the conduit passages 31 so
as to assure that the arc extinguishing ?uid will
?ow through the structure in the desired man
not during its operation.
3
2,067,648
The opposed sides of the slots 5 I, which are dis
placed 90 degrees from one another, align to de
?ne the walls of an arc passage extending entirely
through the arc extinguishing structure, and by
virtue of the fact that each of the plates 41 closes
the arc passage on two sides any substantial lat
eral movement of the arc within the arc passage is
prevented during the normal operation of the
device. Since each of the slots 5I which de?ne
10 the ?ow chambers extends entirely to the edge of
the plates wherein it is formed, the assembled arc
extinguishing structure has a plurality of vent
openings disposed in the sides thereof. This is
particularly illustrated in Fig. 4. A substantial
15 space exists between the inner wall of the in
sulator 21 and the arc extinguishing structure ‘I,
- and the cap 29 for the insulator is provided with
vent openings 51 in order to allow free venting
of the arc extinguishing gas during each circuit
20 opening operation.
>
the flowing streams of arc extinguishing gas cause
the arc to take the substantial form shown in
Fig. 16. The-arc takes on a rather complex shape
during the progress of the arc extinguishing op
eration and the turbulent action of the ?owing
streams of arc extinguishing gas is aided by a
lengthening of the arc which results from the
fact that every other stream ?ows in an opposite
direction.
The two modi?ed structures illustrated in the 10
other ?gures of the drawings operate in substan—
tially the same manner as the embodiment just
described. These structures, however, are in
tended particularly for use with circuit breakers
utilizing an‘arc extinguishing ?uid of the‘liquid 15
type. Both ,of the modi?ed structures are im
mersed in oil or other are extinguishing liquid and
utilize a secondary are, established simultaneous
ly with or prior to the establishment of the main
arc as a source of pressure for moving the arc 20
The operating mechanism II is not an impor
tant part of my invention,.and any means where
by the contact rod 9 may be moved into and out
of engagement with the stationary contact 39
extinguishing
proper.
may be employed.
trated comprises a plurality of superposed plates 25
The breaker is shown in theclosed circuit posi
tion in Figs. 1, 2, and 3. Upon the occurrence of
which are so shaped that they form, in the as
sembled structure, an arc passage ‘I5, a conduit
means 'I‘I through which the arc extinguishing
an overload or some other condition which initi
ates the circuit opening operation of the contact
30 actuating mechanism II, the contact rod 9 is
moved upwardly out of engagement with the sta
tionary contact 39 and the resultant arc is estab
lished within the arc pasage formed by thesides
of the slots 5| which de?ne the ?ow chambers
within the arc extinguishing structure ‘I. Simul
taneously with the upward movement of the con
tact, the electromagnetic valve 2| is operated, by
any suitable means, so as to cause the arc extin~
guishing ?uid contained within the pressure cyl
40 inder I5 to flow through the conduit I9 and into
the four conduit passages 31 extending through
the arc extinguishing structure ‘I. The only way
that this gas can vent is through‘ the ?ow cham
bers which are de?ned by the slots 5| in the
superposed plates 41, and as a result, the arc is
?uid through
an
arc
passage
Referring particularly to Fig. 5, it will be seen
that the arc extinguishing device therein illus—
?uid is caused to flow, and a plurality of ?ow
chambers for causing separate quantities of the 30
arc extinguishing ?uid to flow transversely
through the arc passage in different directions.
The assembled plate structure is ai?xed to a hol
low casting ‘I9 having the form of two enclosed
pressure chambers, each open at the lower end 35
and connecting one with the other through suit
able openings 8| formed in the inner wall thereof.
A movable contact member 83 is slidably sup
ported upon a pin 85 which extends through a
suitable opening in the upper portion of the cast 40
ing ‘I9 and the entire casting is adapted to be
affixed to and supported upon the central con
ductor 81 of an insulator or similar means.
The
contact member 83 is movable downwardly under
the in?uence of a biasing spring 89, a limited 45
amount, this amount of this movement being de
I subjected to a plurality of separate, superposed
?owing streams of arc extinguishing gas, each
?ned by an enlargement 9| on the head of the‘
of which ?ows transversely through the arc pas
sage and each of which ?ows in a direction differ
pin, and the electrical circuit from the contact 83
and its support pin 85 to the casting ‘I9 is de?ned
ent by 90 degrees from the direction of ?ow
through the adjacent ?ow chambers. The gas
?owing through each of the flow chambers comes
by a ?exible shunt 93, one end of which is bolted 50
to the pin and the other end of which is bolted to
directly from the source of supply of the arc ex
tinguishing ?uid and is thus in an unionized con
dition, which is to say that it is in that condition
which is most effective for accomplishing are ex
tinction. Further, the fact that the different por
tions of the are are subjected to streams of arc
extinguishing ?uid which flow in different direc
The lower end of each of the two pressure
chambers 95 and 91, formed within the hollow
60
tions assures an extremely turbulent intermixing
the casing.
'
,
casting ‘I9, is closed by the top plate 99, shown 55
particularly in Fig. 7, of the arc extinguishing
device. This plate 99 has a circular opening IM
disposed in the left hand portion thereof for slid- '
ably supporting an intermediate contact member
I93 which cooperates with the contact 83 to form 60
of the arc extinguishing gas with the arc itself. an are within the smaller pressure chamber 95
during the operation of the arc extinguishing de
The obvious result is to produce a rapid and effi
cient extinction of the arc, usually at the next . vice, this are being utilized as a source of pressure
for moving the arc extinguishing ?uid through
zero point in the current wave.
The action ofthe arc extinguishing ?uid is par
ticularly clearly illustrated in Figs. 15 and 16.
The ?rst of these ?gures illustrates the conditions
in the arc passage immediately following the es
tablishing of the arc therein.
The arrows- indi
cate the direction of ?ow in alternate ?ow cham
bers in the plane of the drawings and the dots
and crosses indicate the two directions of ?ow in
the other chambers normal to the plane of the
drawings. Shortly after the establishment of
75 the arc and the conditions illustrated in Fig. 15,
the flow chambers formed in that structure. The
amount of possible movement of this intermediate
contact member I93 is de?ned by an enlarged an
nular portion I95 formed integral therewith, and
it is biased away from the upper contact 93 by a
suitable leaf spring I01. The upper plate 99 is 70
also provided with an arcuate opening I09 which
is adapted to serve as a portion of the conduit
means which connects the second pressure cham
ber 91 with the ?ow chambers formed in the
lower portion of the extinguishing structure. The 75
4
2,067,648
remainder of the conduit means is de?ned by sim
ilar cut-out portions III formed in the other
plates, these portions aligning with each other in
the assembled structure.
The plate II3 which is disposed immediately
beneath the upper plate 39 is shown in Fig. 8.
It will be seen that this plate includes a slot por
tion II5 extending from the inner conduit de
?ning portion III directly outward, this slot
10 forming the uppermost ?ow chamber within the
arc extinguishing structure. The next plate
(II 1) in the stack structure is shown in Fig. 9,
and it will be seen that the slot I I9 which de?nes
the ?ow chamber in this plate is so disposed that
15 the ?ow of are extinguishing ?uidtherethrough
is substantially at right angles to the ?ow in the
jected to a plurality of transversely ?owing
streams of arc extinguishing liquid, each ?owing
in a direction differing by 90 degrees from the ad
jacent streams, exactly as in the previously de~
scribed embodiment.
The ?owing streams of arc extinguishing liquid
intimately contact and turbulently intermix with
the arc so as to effect its extinguishment within
a very short interval of time. The upper arc,
which is the source of pressure for moving the 10
arc extinguishing ?uid through the ?ow chan
nels, of course, persists until the circuit through
the interrupter is opened and thus assures ade—
quate pressure for moving the arc extinguishing
?uid throughout the entire circuit opening op 15
eration.
'
flow chamber which is de?ned by the slot H5
This type of arc extinguisher is intended to be
formed in the adjacent upper plate 99. The entirely submerged in a body of arc extinguishing
fourth plate in the stack structure comprises a liquid such as oil, and small openings I3I are
second plate I II but this plate is so positioned in provided for assuring that the two pressure cham 20
the stack structure that the ?ow chamber formed bers shall automatically refill themselves follow
by the slot II9 existing therein vents on the op
ing each circuit opening operation. Oil is a
posite side to the ?ow chamber formed in the ?rst particularly suitable arc extinguishing liquid for
plate I IT.
this type of interrupter both because of its good
A second plate I I3 is disposed immediately be insulating properties and because it gasi?es in 25
neath-the lower plate Ill and the bottom plate the presence of an arc to produce large volumes
I2I, which is shown particularly in Fig. 10, is of gas and hence considerable pressure for mov
positioned therebeneath. The bottom plate I2I ing the arc extinguishing liquid through the flow
is provided with a cylindrical opening I23 for de
chambers.
?ning continuance of the arc passage which is
The structure shown in Figs. 11 through 13 30
de?ned by the sides of the flow chamber slots diifers from the device shown in Figs. 5 through
H5 and H9 but is otherwise substantially closed, 10 in two important respects. First, each of the
thus assuring that the arc extinguishing fluid flow chambers is separated from the adjacent ?ow
will be caused to ?ow through the several ?ow chambers by means of a plate I33 similar to that
chambers during each circuit opening operation shown in Fig. 14, this arrangement having been
of the device.
found capable of effecting a more e?icient utiliza
Each of the plate members is provided with tion of the superposed ?owing streams of are ex
seven openings disposed adjacent the edge por
tious thereof for engaging the insulating rod
members I25 which serve to hold the plates to
gether and to a?ix the plate structure to the cast
ing ‘I9. The tie members I25 ,are, of course, of
su?icient strength.to resist considerable internal
pressure and to hold the plates together during
the arc extinguishing operation.
The device is shown in the closed circuit posi
tion in Figs. 5 and 6. During each opening op
eration, the bridging member I21 and the mov~
able contact rod I29 supported thereon is moved
downwardly. The upper contact 83 follows this
tinguishing liquid. And second, each of the ?ow
chambers is provided with means for causing the
rate of flow of the arc extinguishing ?uid there_ 40
through to be greatest adjacent the sides of the
?ow chamber, this being done in order to aid in
maintaining the arc in the central position within
the arc passage.
The entire arc extinguishing structure is built 45
up from. plates exactly similar to those utilized
in building up the device shown in Figs. 5 and 6
with the addition that each of the plates having a
flow chamber therein is followed by one of the
plates I33 shown in Fig. 14, as mentioned in the
I movement until the enlarged head 9I on the guide > previous paragraph, and the addition of dow
pin 35 therefor engages the upper surface of the directing members I34 disposed within each of ‘
casting ‘I9, at which time further downward the ?ow chambers. The are passage within the
movement'is prevented. The intermediate con
structure is de?ned by the sides of the slots H5
tact I93, however follows the rod contact down
and II 9 forming the ?ow chambers, the openings
wardly, being biased into engagement therewith IOI and I23 in the top and bottom plates and the 55
by the leaf spring IU‘I, until the enlarged edge
portion I95 thereof engages the upper surface of
the top plate 99 of the arc extinguishing struc
ture. A relatively short arc is thus established
within the inner pressure chamber 95, shortly
after the initiation of the circuit opening opera~
openings I35 in the plates I33.
‘
By interposing one of the plates I33 inter
mediate each of the plates de?ning a ?ow cham
ber, the ?owing streams of arc extinguishing
liquid are spaced apart a greater distance from
each other than in the structure shown in Figs.
tion, and as soon as the downward movement of ~ 5 and 6 and a more e?ective utilization of each of
the intermediate contact ceases, an arc is drawn those streams is e?ected. The effect of these
within the arc passage formed within the arc additional plates is illustrated particularly in Fig.
extinguishing structure proper. ,
-
The arc formed between the upper and the
intermediate contacts volatilizes the arc extin~
17, which shows the distribution of the ?owing
streams of arc extinguishing ?uid and the are
within a device similar to that illustrated in Figs.
65
guishing liquid contained within the inner pres
11, 12, and 13. This structure might properly be
70 sure chamber 95 and thereby produces a pressure considered as somewhat of a re?nement over that
70
which forces the arc extinguishing liquid con
shown in Figs. 5 and 6. The use of the plates I33
tained in the second pressure chamber 9'! to move aids in preventing substantial lateral movement
into the conduit passage ‘I'I existing within the‘ of the arc within the arc passage and in so doing
arc extinguishing structure and thence into the increases the effectiveness of the superposed ?ow
75 several ?ow chambers. As a result the are is sub
streams. The throttling member I3‘ disposed in 75
2,067,648
each oi'pthe ?ow chambers causes the rate of ?ow
through each of those chambers to be greatest
adjacent the outer edges thereof, this-condition
aiding in maintaining the arc in a central position
within the aré‘passage and also being of value
5
eration thereof. In the structure shown, the arc
extinguishing ?uid ?ows upwardly in the inlet
conduit passage and downwardly in the outlet
conduit passage. It is, of course, possible to
in increasing the e?iciency of arc extinction by
have both of these ?ows in the same direction, a
suitable outlet conduit connecting at the upper
concentrating the ?ow stream adjacent the outer
'end wlththe outlet conduit passage through the
surface of the arc.
arc extinguishing being provided.
_
The modi?ed form of arc extinguishing struc
10 ture shown in Figs. 18 through 21 is similar to
that shown in Figs. 2, 3, and 4, in that it is built
up of a plurality of superposed plates having
The operation of this modi?ed structure is
substantially the same as for the two structures 10
previously described, the arc is drawn within the
arc passage which is de?ned by the circular open- 1
suitable alined openings for de?ning an arc pas
ing's H5 in the‘ plates 20'! and the sides of the
sage, ?ow chambers, and conduit means whereby slots 2|‘! which de?nes the several ?ow chambers.
15 the arc extinguishing ?uid is introduced into ‘Simultaneous with the establishing of the arc, the 15'
each of the ?ow chambers. The structure dif
arc extinguishing ?uid is introduced into the in
fers from that shown in Figs. 2, 3, and 4 in that. let conduit 2l9 under pressure so as to cause
an outlet conduit passage as well as an inlet
conduit passage is formed within the means de
20 ?ning the walls of the arc passage.
‘
Excepting the top plate 20l and the bottom
plate 203, the entire structure is built up of two
types of plates 205 and 201, the outlines of which
are shown respectively, in Figs. 19 and 20. In the
25 assembled device these plates are alternately
disposed, so that one of the plate members 201
is interposed between each two of the ?ow cham
ber de?ning plate members 205, and each al
ternate ?ow chamber'de?ning plate 205 is in
30 verted with respect to the two adjacent ?ow
chamber plates 205, in order that the ?ow of arc
extinguishing ?uid through each alternate ?ow
chamber shall be in opposite directions. This ar
rangement is shown particularly in Figs. 19 and
35 21 wherein the arrows indicate the direction of
?ow.
Four equally spaced openings are provided in
each of the plates comprising the walls of the- arc
extinguishing device for engaging the insulating
40 tie rods 209 which serve both to maintain the sev-_
eral plates in proper alinement and to hold the
‘ structure together.
The upper plate 20! has a
circular opening 2 H in the central portion there
the arc to be subjected‘ to a plurality of super
posed transversely ?owing streams of arc extin- l
guishing ?uid, the direction of ?ow in adjacent 20
streams being in opposite directions. By utiliz
ing but a single outlet conduit, the disposal of
the heated arc extinguishing ?uid is facilitated
and increased reliability of operation‘ is effected.
In the foregoing, I have shown how my inven 25
tion, which consists, in its broadest aspects, in the
provision of means whereby an arc may be sub
jected to the action of a plurality of spaced ?ow
ing streams of arc extinguishing ?uid having dif
fering directions of'?ow, may be applied to two 30
types of arc extinguishing devices. I have also
shown how a simple plate structure may be em
ployed for constructing an arc extinguishing de
vice in accordance with the principles of my in
35
vention.
\
In addition I have disclosed certain ' preferred
structural arrangements which are particularly
suitable for carrying out the objects of my inven
tion in a simple manner and in a comparatively
inexpensiye device. In the claims which I have 40
made to my invention, I have speci?ed that an
arc extinguishing ?uid is employed for producing
the ?owing streams which accomplish the ex
of and is otherwise substantially solid in order
45 that both the inlet and outlet conduit passages
tinction of the are. The word ?uid is used in ~
these claims in its broadest sense and is intended 45
throughthe arc exinguishing structure shall be
closed at the top. Each of the remaining plates
has a pair of diametrically opposed oval shaped
openings 213 which aline in the assembled struc
50 ture to de?ne the inlet and outlet conduit pas
sages. A centrally disposed circular opening 2 IS
in each of the plates 20'! aid in de?ning the arc
to include gases, vapors, and liquids.
While, in accordance with the patent statutes,
passage.
The ?ow chambers are created by con
necting the oval openings 2 l3 in each of the plates
205 with a slot 2 l ‘I, the width of which is not sub
stantially greater at its central portion than the
width of the openings 2l5 which aid in de?ning
arc passage.‘ Since each of the ?ow chamber de
?ning plates 205 is separated from the adjacent
60 plates 205 by one of the plates 201, shown par
ticularly in Fig. 20, it is apparent that the arc
is prevented from substantial lateral movement
within the arc passage during the operation of
the device.
65
-
'
The are extinguishing structure may be mount
ed on an insulator column similar to the struc
ture shown in Fig. 1. The inlet conduit 2|9
which connects with the inlet conduit passage
within the arc extinguishing structure must, of
70 course, be disposed at one side of the support
plate 22l, in order that'it shall engage the inlet
conduit passage extending through the device,
and an outlet conduit 223 is preferably provided
for conducting the heated arc extinguishing gases
away from the circuit interrupter during the op
I have, in the foregoing, disclosed the struc
tural details of certain speci?c embodiments of
my invention, it is to be understood that many
of these details are merely illustrative, that vari
ations of their precise form will be'both neces
sary and desirable in certain applications. I de
sire, therefore", that the language of the accom
panying claims shall be accorded the broadest 55
reasonable construction and that my invention
shall be'limited only by what is expressly stated
therein and by the prior art.
I claim as my invention:
1. In a circuit interrupter, a reservoir, a quan 60
tity of a gaseous are extinguishing ?uid contained
within said reservoir under pressure, means for
establishing an are, a plurality of separate con
duits extending transversely to said arc and be
ing vented at one end thereof only, each of said 65
separate conduits being in separate parallel planes
transverse to said are, and means for supplying
the unvented end of each of said separate con
duits with said are extinguishing ?uid for sub—
jecting different portions of said are to separate, 70
?owing streams of said are extinguishing ?uid,
the axesof ?ow of at least some of said streams
being substantially at right angles to the axis
of said are and being displaced, with respect to ‘
each other, through a substantial angle.
6
2,067,648
2. In a circuit interrupter, an arc extinguishing
structure including means for de?ning the walls
of an arc passage, means for establishing the arc
5. In a circuit interrupter, in combination, a
incident to the opening of the electrical circuit
plurality of switch members for performing
through said interrupter longitudinally within
switching operations and between which an arc
may be drawn, an arc passageway in which the
cooperative switch members are disposed, a quan
tity of arc extinguishing ?uid stored near the
switch members, a plurality of separate conduit
passageways, vented at one end only, disposed in 10
said are passage, said wall de?ning means hav
ing a plurality of transversely extending ?ow
chambers formed therein, and the axes of at
least some of said flow chambers being displaced,
10 with respect to each other, through a substantial
angle, each of said flow chambers being in sepa
rate parallel planes transverse to said are passage
and being vented at one end thereof only, a body
of arc extinguishing ?uid, means for supplying the
15 unvented end of each of said ?ow chambers with
are extinguishing ?uid from said body of are ex
tinguishing ?uid, and means for causing a sepa
rate quantity of said arc extinguishing ?uid to
>20
versely through said are passage in different di
rections.
flow through each of said ?ow chambers, at least
during each circuit opening operation, in order
that different portions of said are shall be sub
iected to a separate, transversely ?owing stream
of fresh arc extinguishing ?uid during each arc
extinguishing operation.
3. In a circuit interrupter, an arc extinguishing
structure including means for de?ning the walls
separate parallel planes and extending trans
versely across the are passageway, means for
connecting the conduit passageways with the
stored arc extinguishing ?uid for supplying the
?uid to the conduit passageways, each of the con
duit passageways directing a separate stream of
the ?uid across the arc passageway in different
parallel planes, means responsive to the operation
of the switch members for effecting the ?ow of
the arc extinguishing ?uid through the conduit 20
passageways, the conduit passageways being dis
posed to direct a ?ow of arc extinguishing ?uid
across the are passageways in diilerent planes and
in di?erent radial directions to e?ect a high de
gree of turbulence and a rapid extinction of the 25
arc.
-
of an arc passage, means for establishing the arc
- 6. In a circuit interrupter, in combination, a
incident to the opening of the electrical circuit
plurality of switch members for performing
through, said interrupter longitudinally within
switching operations and between which an arc
may be drawn, an arc passageway in which the 30
cooperative switch members are disposed, a
quantity of arc extinguishing ?uid stored near the
switch members, a plurality of conduit passage
30 said are passage, said wall de?ning means in
cluding means for preventing substantial lateral
movement of said are within said are passage and
having a plurality ‘of transversely ?ow chambers
formed therein, each of said ?ow chambers being
85 in separate parallel planes transverse to the longi--‘
tudinal axis of said are passage and being vented
at one end thereof only, the axes of at least some
of said flow chambers ,Lbeing displaced, with re
spect to the axes of adjacent ?ow chambers
through a substantial angle, a body of arc ex
tinguishing ?uid, and. means for causing a sepa
rate quantity of said are extinguishing ?uid to
?ow through each of said ?ow chambers, at least
during each circuit opening operation, separate
45 portions of said are being thereby subjected to a
ways leading from the stored arc extinguishing
?uid for directing the ?uid across the arc pas 35
sageway in di?erent planes, means responsive to
the operation of 'the switch members for effect
ing the flow of the arc extinguishing ?uid through
the conduit passageways, the conduit passageways
being disposed to direct a ?ow of arc extinguish 40
ing ?uid across the arc passageway in di?'erent
planes and in different radial directions to e?ect
a high degree of turbulence and a rapid extinction
of the arc, and ?ow directing members disposed
in the conduit passageways for dividing the stream 45
separate stream of fresh arc extinguishing ?uid
of arc extinguishing ?uid to cause the rate of
which ?ows transversely through said are passage
in a different direction from the stream in said
?ow of the ?uid to increase adjacent the sides of
adjacent ?ow chamber.
4. In a circuit interrupter, an arc extinguishing
structure including a plurality of superposed, con
tiguous plate members which de?ne the walls of
an arc passage, said plate members having sym
metrically disposed cut out portions for de?ning
55 conduit means extending along said are passage
and at least some of said plate members having
slots cut therein for defining ?ow chambers, each
of which chambers extends, transversely across
said are passage, from said conduit means to the
edge of the plate wherein it is formed, the axes
of each of said ?ow chambers in said superposed
plate members being displaced, with respect to
each other, through a substantial angle from the
axis of adjacent ?ow members, means for estab
05 lishing the arc incident to the opening of the elec
trical circuit through said interrupter within said
are passage, a body of arccextinguishing ?uid,
and means for causing a quantity of said are ex
the conduit passageways and arc passageway to
increase the turbulence during an arc extinguish
ing operation.
7. In a circuit interrupter, in combination, a
plurality of switch members for performing
switching operations and between which an arc
may be drawn, an arc passageway in which the
cooperative switch members are disposed, a quan 55
tity of arc extinguishing ?uid stored near the
switch members, a plurality of separate conduit‘
passageways extending transversely across the
arc passageway in di?erent parallel planes,
means for connecting the conduit passageways
with the stored arc extinguishing ?uid for sup
plying the ?uid to the conduit passageways, each
of the conduit passageways directing a separate
stream of the ?uid across the arc passageway in.
one of the diiferent parallel planes, means re 65
sponsive to the operation of the switch members
for effecting the flow of the arc extinguishing ?uid
through the conduit passageways, the conduit pas
sageways being disposed to direct a ?ow of are ex
70 tinguishing ?uid to flow through said conduit‘ tinguishing ?uid across the arc passageways in 70
means and through each of said ?ow chambers
at least during the entire period of each circuit
opening operation, separate portions of said are
being thereby subjected to separatestreams of
fresh arc extinguishing ?uid which ?ow trans
different planes and in di?‘erent radial directions
to eifect a high degree of turbulence and a rapid
extinction of the arc, and ?ow directing members
disposed in the conduit passageways for dividing
the stream of arc extinguishing ?uid and direct~ 75
7
2,067,648
ing the divided stream to the outside of the arc
passageway to increase the‘ turbulence during
an arc extinguishing operation.
8. In a circuit interrupter, in combination, a
plurality of switch members for performing
switching operations and between which an arc
may be drawn, an arc passageway in which the
cooperative switch members are disposed, a quan
tity of arc extinguishing ?uid stored near the
10 switch members, a plurality of separate conduit
passageways extending transversely across the
arc passageway in different parallel planes,
means for connecting the conduitpassageways
with the stored arc extinguishing ?uid for sup
15 plying the ?uid to the conduit passageways, each
of the conduit passageways directing a separate
stream ‘of the ?uid across the arc passageway in
one of the di?erent parallel planes, means re
sponsive to the operation of the switch members
20 for e?ecting the ?ow of the arc extinguishing
?uid through the conduit passageways, the con
duit passageways being disposed to direct a ?ow
of arc extinguishing ?uid across the arc passage
ways in di?erent planes and in different radial
directions to effect a high degree of turbulence
and a rapid extinction of the arc, and ?ow di
recting members disposed in the conduit passage
ways for dividing the stream of arc extinguishing
fluid and directing the divided stream to the out
80 side of the arc passageway, the conduit passage
ways and the flow directing members being dis
posed to cooperate in centering the are drawn in
the arc passageway during an arc extinguishing
operation.
35
~
unvented end of each of said conduits with said
quantity of arc extinguishing ?uid, and means
for causing said are extinguishing ?uid to ?ow
through said separate conduits, during a circuit
opening operation, to subject said arc to a plu
rality of spaced, separate streams of said ?uid
?owing transversely of said arc, at least some of
said streams ?owing in different directions.
11. In a circuit interrupter, an arc extinguish
ing structure including means for de?ning the 10
walls of an arc passage, means for establishing
the arc incident to the opening of the electrical
circuit through said interrupter longitudinally
within said are passage, said wall de?ning means
having a ‘plurality of ?ow chambers, each of 15
which is in a separate plane substantially parallel
to the other ?ow chambers and extending trans
versely across different portions of said are pas
sage and being vented at one end thereof only,
the axes of at least some of said ?ow chambers
being displaced, with respect to each other,
through a substantial angle, a body of arc ex
tinguishing ?uid, and means, including a source
of pressure and a common conduit means into
which each of said ?ow chambers opens at the 25
unvented end thereof, for causing a quantity of
said are extinguishing ?uid to flow through each
of said ?ow chambers, at least during each cir
cuit opening operation, separate portions of said
are being thereby subjected to separate, ?owing 30
streams of fresh arc extinguishing ?uid which
?ow transversely through said arc passage in
di?erent directions.
.
12. In a circuit interrupter, an arc extinguish
9. In a circuit interrupter, in combination, a
quantity of arc extinguishing ?uid, means for
ing structure including means for de?ning the 35
de?ning the walls of an arc passage, means for
the arc incident to they opening of the electrical
establishing an are within said passage, a plu
walls of an arc passage, means for establishing
circuit through said interrupter longitudinally
rality of separate conduits extending transverse
40 ly to said arc,'each of said separate conduits be
ing in separate parallel planes transverse to said
including means for preventing substantial lat 40
arc, means for supplying each of said separate
conduits with ?uid from said quantity of are ex
tinguishing ?uid, means for causing said ?uid to
45 ?ow through said conduit during a circuit open.
sage and having a plurality of ?ow chambers, each
of which is in a separate plane substantially par
allel to the other ?ow chambers and extends
transversely across said are passage'and is vented 46
within said are passage, said wall de?ning means
eral movement of said arc within said arc pas
ing operation to subject di?erent portions of said
at one end only, said arc passage except for said
are to separate streams of said ?uid ?owing trans
versely to the axis of said are and at least some
of said streams ?owing in different directions, and
vented ?ow chambers being substantially com
pletely enclosed, the axes of at least some of said
?ow chambers being displaced, with respect to
each other, through a substantial angle, a body 50
of arc extinguishing ?uid, and means, including
50 means in some of said separate conduits for caus
ing the rate of ?ow of said are extinguishing
?uid in said conduits to increase in the edge
portions of said streams adjacent the sides of
said conduits before said streams encounter said
55 are for maintaining said are centrally of said are
passage.
10. In a circuit interrupter, in combination, a
quantity of arc extinguishing ?uid, means for
establishing an arc, meansfor preventing sub
60 stantial lateral movement of said arc, a plurality
of separate conduits extending transversely to said
are and being vented at one end only, each of said
separate conduits being in separate parallel planes
transverse to said arc, means for connecting the
a source ofpressure and a common conduit means
formed in said wall de?ning means and connect
ing with each of said ?ow chambers at the un
vented end thereof for causing a quantity of said 55
are extinguishing ?uid to ?ow through each of
said ?ow chambers, at least during the entire
period of each circuit opening operation, separate
portions of said are being thereby subjected to
separate streams of fresh arc extinguishing ?uid
which ?ow transversely through said are passage
in di?erent directions.
CARL REmR.
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