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Патент USA US2104914

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Jan. 11, 1938.
2,104,914
R. TEMPLE, JR
CIRCUIT BREAKER
'2 Sheets-Sheet 1
Original Filed April 24, 1933
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ROBERT TEMPLE
JR.
INVENTOR.
4“ ATTORNEY.
Jan. 11, 1938.
R, TEMPLE, JR
2,104,914. 4
CIRCUIT BREAKER
Original
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ROBERT TEMPLEJR.
INV NTOR.
BY
1
'
A‘? ATTORNEY.
Patented Jan. 11, 1938
i
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i
i _ UNITED ' STATES‘ ' PATENT OFFICE
2,104,914
onwurr BREAKER
'
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nobei-t Temple, .In, Brooklyn, N. Y.
Original application April 24, 1933, Serial No.
667,686, now Patent No.‘ 2,017,329, dated Octo
ber 15, 1935. Divided and this application 00
tober 14, 1935, Serial No. 44,903
12 Claims. (Cl. 200-150)
This invention relates to circuit breakers and being provided with ?anges I9 to insure a more
constitutes a division of my cop'ending applica- ?rm engagement with the member 20. The
tion on explosively actuated devices, Ser. No. 667,- plunger 24 is slidably mounted within a barrel 26
v‘ 686, ?led April 24, 1933 now Patent No. 2,017,329, ~ having a longitudinal aperture 21, the barrel be
5 issued October 15, 1935.
ing positioned in spaced relation to the base by 5
The invention is more particularly directed to
an oil circuit breaker, employing an explosive
means of a supporting member 23, said support
ing member having an upper clamping portion
charge to actuate the same. The present circuit 23'. When the circuit breaker is ina closed posi
breaker is adapted both for high and low current’ tion, as illustrated in Fig. 1, the inner end of the
’ circuits and is so constructed that the circuit may. plunger 24 abuts against a shoulder- 29 in vthe 10
be opened either when an overload occurs, or at barrel.
.
any other desired time, without producing an arc.
Adlaeent t0 the Shoulder 29, the aperture in
A large number of oil and other circuit opening ‘ the'bal‘l‘el is formed with a. l‘edlieed portion 3|
_ devices have been produced, but these for the Within which the'fOl‘Ward end 01 aseeend plunger
1" most part are rather complicated and exceedingly 32 is positioned when. the circuit breaker is in a 15
expensive devices. The present invention may or
closed position An on Port (Ir-inlet 33 is formed
may not be immersed within an oil bath and the
device is constructed in such a manner as to open
the circuit in a way that no appreciable or con-20 tinued arc can occur between the contact points.
in the barrel at a point adjacent to the forward
end 01' the plunger 32 when the veil‘euit breaker
is in a Closed DOSiti0n- The Oil inlet leads to an
oil reservoir 34 and so long as the plunger 32 is
Anotheroblect of the invention is the provision
of an explosively actuated circuit breaker, the
in the position ShOW?' in F181" -1, .the chambers 20
within the plunger 24 and the .move’eble contact
- operation of which is so positive that the circuit members are completely ?lled with .joil- At the
will be broken even though the overload has been reel‘ end 01' the plunger a hollow piston-‘35 is per
‘ 25 so great as to fuse the contact points together.
manently secured, the piston closely '?ttinc en
In the drawings, Fig, 1 is a, broken top plan I enlarged portion 33 of the aperture in the barrel.
view of the preferred embodiment of the inven- In order to insure a close fit between the Piston
tion, the view being largely in section;
-
Fig. 2 is a broken side elevation thereof;
and the barrel, said piston is provided with a
.
_
plurality of Spaced piston rings 38.
When the
30
.Fig. 3 is a broken top plan view, largely in sec- detonation takes place, as hereinafter described, 30
_ tion, of a modi?ed form of the invention; and
the piston and the plunger 32 move forward. and, =
Fig. 4 is abroken side elevation thereof,
in order to return the piston thereafter to its
The preferred embodiment of the invention 11- I normal Position. a 0011 Compression Spring 39 is
, lustrated in Figs. 1 and 2 is mounted on a, base positioned between the forward end of the piston
3” Ill and includes a pair of stationary contact mem- end a Shoulder "- Inesmueh as the area, Within 35
bers II and I2, which are mounted in spaced
relation to the base by means of supporting members I3 and I 4. ,Each stationary contact mem~ ber is formed with a longitudinal aperture l5
40 extending inwardly from its outer end, the outer
the aperture 30 is closed. theforwal‘d moving,
Piston 35 OOmDI‘eSSeS the ail‘ therein which forms
a cushion to prevent the piston from striking the
shoulder 40 too severely. In order to reduce the
compression, however, air outlet ports 4| are 40
end of said apertures being outwardly ?ared, as
formed in the portion of the barrel adjacent to
indicated at l6. -In order to make a more ?rm
' contact between the stationary and the moveable
the shoulder 40. '
The rear end of the barrel is provided with an
r contact members, the apertures are provided with
enlarged breech portion 42 and is supported in
4" a plurality of annular recesses l1 in which com-
spaced relation to the base by means of a bracket
pression rings l8 are ?tted.
The moveable contact -member 20 is substantially U~shaped and is formed with a longitudinal
aperture 2| extending from end to end. The
43 having a clamping portion 44. The rear- end
of the apertue 36 in the barrel is threaded, as at
45', to receive a breeching element 48 having a
longitudinal aperture 4'! to receive a blank car
terminals of the moveable contact member are
tridge' 43.
"
tapered, as shown at 22, in order to facilitate
their admission into the aperture. The moveable.
‘contact member is carried by a hollow plunger
24, having a longitudinal aperture 25 which cominunicates with the aperture 2|, the plunger also
'
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When an overload in the circuit occurs, the -
cartridge is detonated in the following manner
A breech block 49 having a reduced threaded for
ward portion 50; is ?tted within a threaded aper
ture at the rear end of the ‘breeching element. .
2
2,104,914
A ?ring pin 52 is mounted within a longitudinal
aperture 53 in the breech block. Thus, when it
is desired to actuate the circuit breaker, the fir
ing pin is caused to strike the cartridge by a
94 is provided with a plurality of spaced contact
rings 95 and normally resides at a point substan
tially half-way within the aperture 13 in the
barrel, this plunger being supported for longi
tudinal movement in a supporting member 96
suitable mechanical‘ or electrical means. This ‘ having an aperture 91 therein.
causes the explosive gases to act upon the piston,
$1
The moveable
member is further provided with a sec
thereby driving the plunger 32 forward, the initial contact
set of contact rings 98, which are adjacent
movement thereof closing the oil port. Further ond
movement of the piston 32 places the oil under to the aperture 91 when the circuit breaker is in 10
a closed position. The closed cylinder I00, the re
10 an exceedingly high pressure which reacts against duced portion ml of the moveable contact mem
the inner ends 55 and 56 of the apertures i5 in
the stationary contact members, thereby causing ber, the piston I02, and the buffer I03, are sim
the moveable contact member to travel inthe ilar to that shown in the preferred embodiment‘.
direction of movement of the plunger 32. Move I Likewise, the circuit breaker is adapted to be re
set by actuating the lever IM which is pivotally
15 ment, of course, proceeds after the oil begins to
escape and as this movement continues at an
exceedingly high velocity, and the oil, which is
under a continuously increasing pressure, is
forcibly moved outwardly in the annular area
20 between the stationary and moveable contact
members. The oil is under a su?iciently high
pressure and velocity to prevent the formation of
a vacuum and any appreciable or continued arc
as well.
mounted to the base at I05. The screw I05 may
serve as the terminal for the ?xed contact and
the screw. I01 for the moveable one.
Although not shown in the drawings, each of
the embodiments of the present invention may, if
desired, be immersed in oil.
This is not essen
tial for the successful operation of the device,
however, since the oil is forced outwardly be
tween'the ?xed and moveable contact members at
In order to limit the outward movement of the ‘such a velocity and pressure as to quench any
arc that may beformed.
moveable contact member, the plunger 25 is pro
What I claim is:—
vided at its forward end with an integrally formed
1. A circuit breaker comprising stationary and
solid rod 58, having a reduced portion 59 at its
forward end. The rod passes through a closed moveable contact members, the latter having a
?uid ?lled chamber, a piston free for movement 3'
30 cylinder 60, the cylinder having two or more op
posed ports 6! adjacent to its forward end, the independent of the movable ‘contact member
cylinder being suitably supported on a port 62. adapted to compress the ?uid and thereby actu
The reduced portion of the rod carries a piston 63 ate the moveable contact member and explosively
which compresses the air within the cylinder after actuated means for moving the piston.
25
35 said piston has passed the ports 6 I, thereby form
2. In a circuit breaker, the combination of a :
?xed contact member and a moveable contact
ing an air cushion at the forward end of the cyl
inder. In some instances, it may be desirable to member having a ?uid ?lled chamber therein,
place a resilient gasket 64 at the forward end. communicating with the ?xed contact member, a
When the circuit breaker is actuated, the move— plunger free for movement independent, of- the
able contact member has moved forward to the movable contact member adapted to compress the
40 position shown in the broken lines in Fig. 1. It ?uid and thereby actuate the moveable contact
may then be returned to its closed position by I member and explosively actuated means for mov
'
manipulation of the lever 65, which is pivotaliy ing the plunger.
3. In an explosively actuated circuit breaker,
mounted on the base at 66.
45
The modi?ed embodiment of the invention a pair of apertured stationary contact members,
shown in Figs. 3 and 4, is similar to the preferred a U shaped hollow moveable contact member,
the ends of which pass into the stationary contact
embodiment of the invention except that it is pro
vided with only a single moveable contact member members, a hollow . plunger carrying said U
rather than a double one, as in the preferred em- , shaped contact member, a ?uid carried within 50
bodiment. In this instance, the barrel 18 is said hollow member, an explosively actuated pis
50 mounted in spaced relation to the base ‘H by ton associated within said hollow plunger, where
means of a supporting element ‘I2 which is secured by, when the piston is actuated, the moveable
contact member will pass from the stationary
to the base and is provided with a clamping por
tion ‘I2’. The barrel is formed with a longitudinal contact members and the ?uid will be expelled
aperture ‘I3 having an outwardly ?ared portion under pressure.
55 ‘I4 at its forward end. Substantially midway be
4. A circuit breaker comprising a hollow cylin
tween the ends of the barrel an oil inlet port 15 drical contact member, a funnel-shaped guide
integral with one end of the cylindrical contact
is positioned, this inlet leading to the oil reser
voir ‘I6. Adjacent‘ to the oil port, the barrel is member, a second contact member normally po (ii)
sitioned in'the ?rst-named member and in elec
formed with an enlarged portion 18 and the aper
60 ture 19 in this portion is correspondingly enlarged.
trical contact therewith, means de?ning a cham
The plunger 80 is similar to that shown in the ber in communication with the hollow cylindri
cal portion of the ?rst contact member, electri
preferred embodiment and likewise carries a hoi
low piston 82 at its rear end, the piston having cal insulating liquid in the chamber, a piston 65
a plurality of piston rings 83. This portion of movable into engagement with the ?uid in the
65 the barrel is also supported in spaced relation to
chamber, explosive means for moving the piston,
the base on a supporting element 84 having an pneumatic and metal spring means for damping
upper clamp 85. The breeching element 81 is the movement of the piston, . and pneumatic
screw threaded into an enlarged portion 88 in means for damping the movement of the contact
members apart as a result of the movement of
the rear end of the barrel, this breaching-ele
ment having a longitudinal aperture 88 in which the piston, said insulating ?uid being forced
the cartridge 9|) is positioned. The breech block rapidly between the contact members by the pis
SI and ?ring pin 92 are similar to that shown in ton as the members are moved apart.
5. A circuit breaker comprising a hollow cylin
the preferred embodiment.
75
The rear end of the moveable contact member
drical contact member, a second contact member
3
2,104,914
normally positioned in the ?rst-named member
and explosive means for- moving the contacts,
and in electrical contact therewith, means de?n
ing a chamber in communication with the hollow
apart and simultaneously forcing insulating liq
_ cylindrical portion of the ?rst contact member,
in electrical insulating liquid in the chamber, a pis
ton movable into engagement with the ?uid in
the chamber, explosive means for moving the pis
ton, means for damping the movement of the pis
' ton, and means for damping the movement of the
10 contact members apart as a result of the move—
ment of the piston, said insulating ?uid being
forced rapidly between the contact members by‘
the piston as the members are moved apart.
6. A circuit breaker comprising a hollow cy
15 lindrical contact member, a second contact
member normally positioned in the ?rst-named
member and in electrical contact therewith,
means de?ning a chamber in communication with
the hollow cylindrical portion of the first con
20 tact member, electrical insulating liquid in the
chamber, a piston movable into engagement with
the ?uid in the chamber, and explosive means
for moving the piston, said insulating ?uid being
forced rapidly between’the contact members by
25 the piston as the members are moved apart.
7. A circuit breaker comprising a hollow cylin
drical contact member, a second contact member
normally positioned in the ?rst-named member
and in electrical contact therewith, means de
?ning a chamber in communication with the hol
low cylindrical portion of the ?rst contact mem
ber, electrical insulating liquid in the chamber,
a piston movable into engagement with the ?uid
in the chamber, explosive means for moving the
piston, means for damping the movement of
the piston, and means for damping the move
ment of the contact members apart as a result
of the movement of the piston.
-
8. A circuit breaker comprising in combina
uid in considerable quantities and at explosive
pressures between the contacts;
I
9. A circuit breaker comprising in combina
tion, a pair of engaging electrical contacts, means
mounting the contacts for relativemovement,
means for moving the contacts apart and simul
taneously forcing insulating liquid in consider
able quantities and at relatively high pressures 10
between the contacts, means for damping move
ment of the contact-moving means, and means
for damping‘relative movement of the contacts.
10. In combination, a cup-shaped member, a
hollow rod slidably‘ received in ?uid-tight re
lation in the member, ?uid carried in the hollow
rod, a piston movable into compressing relation
with the ?uid to thereby forcibly eject the rod
from the cup, and explosive means for movingthe
piston.
20
11. In combination, a pair of spaced contacts,
means bridging and electrically connecting the
contacts, and ?uid-pressure means adapted on
electrical overload to apply ?uid-pressure forces
through an insulating liquid directly between 25'
each contact and the portion of the bridging
means engaging therewith to positively move the
bridging means away from each contact while
rapidly discharging the liquid between each con
tact and its associated portion of the bridging 30
means.
12. In combination, a pair of spaced contacts,
means bridging and electrically connecting the ~
contacts, and ?uid-pressure means adapted on
electrical overload to apply ?uid-pressure forces
through an ‘insulating liquid directly between
each contact and the portion of the bridging
means engaging therewith to positively move the
bridging means away from each contact.
40 tion, a pair of engaging electrical contacts, means
mounting the contacts for relative movement,
ROBERT TEMPLE, JR.
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