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Патент USA US2105286

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Jan. 11, 1938.
2, 105,286
Filed Feb. 21, 1936
5 w? rø/v lc. www/N05;
Patented Jan. ll, 1938
Burton F. Jennings, Bellevllle, Ontario, Canada
Application February 21, 1988, Serial No. 65,162
lclulm. (Cl. ZOO-52)
This invention relates' to improvements in an
electric circuit breaker and its principal object
is to provide a construction of simple form,
which can be easily made at a reasonable cost
5 and which can be installed in a circuit at present
in use or in combination with new circuits as
being built.
A further object is to provide a circuit breaker,
which will be found effective for use on automo
10 biles or like vehicles, when a plurality of the
same are placed in predetermined positions such
as two adjacent the front and two adjacent the
rear of the automobile and which would, under
ordinary circumstances, have one or other of the
15 outer or free end of the'plunger struck during
an impact upon the automobile accidentally or
otherwise striking a person or object, such as
what is commonly called a hit-and-run accident.
A further object is to provide a circuit breaker,
20 which` will break the ignition circuit of an auto
mobile and thus reducethe possibiiities of ?re
hazard upon the automobile being in an accident
or collisions in which the impact causes the plung
er of one or other of the circuit breakers to be
25 actuated to circuit breaking position.
A further object of my invention is to provide
a circuit breaker of simple form which is nor
mally sealed in its operative position and which,
upon the circuit being broken, cannot be re-set
3 O for further use without the seals having been
broken and provision whereby the construction
may be re-sealed after the circuit breaker has
been reprepared to normal operative condition.
A further object of my invention is to pro
35 vide a circuit breaker which is simple in con
struction and which may have many different
uses wherein a construction of this nature may
be found most advantag'eous.
With these and other objects in view as will
40 appear as the description proceeds, the inven
tion consists in the novel construction, combina
tion and arrangement of co-operating elements
as hereinafter more speci?cally set forth, claimed
and shown in the accompanying drawing, in
45 which:
Fig. 1 is a longitudinal sectional perspective
view of the body portion of my circuit breaker,
certain parts being shown in section and others
in full view, illustrating the preferred embodi
50 ment of my invention.
Fig. 2 is an enlarged view of a.` modi?ed form
of a terminal-contact `member and adjacent
Like numerals of reference designate corre
55 sponding parts throughout the different views.
In the objects above set forth. I have men
tioned the use of my circuit breaker in connec
tion with an automobile. I do not wish to be
limited to the use of the same in connection with
automobiles exclusively'. The circuit breaker as 5
disclosed in this application may be used to elimi
nate ?re hazards upon an aeroplane crashing or
the circuit breaker may be used in many differ
ent ways and for many different mechanical or
electrical equipment wherein it is desired to pro- 10
vide a circuit breaker which is normally in op
erative position but which may be temporarily
moved t`o inoperative position upon actuation of
the plunger accidentally, mechanically or auto
matically on account of excessive pressure.
3 is a body portion of my circuit breaker hav
ing a longitudinal opening l therein from one
end thereof in which a plunger 5 snugly ?ts and
may be moved longitudinaily therein. The outer
or free end of this plunger 5 may extend any de- 20
sired predetermined distance and may have a
single end portion or the end may 'be bifurcated
to provide a Y-shaped end portion, the striking
of either end portions Operating through a com
mon inner end portion of the plunger 5. If de- 25
sired, it may have a greater number of spaced
unit ends, all of whichconverge to the one main
portion of the plunger 5. Furthermore, the ac
tual ends of the respective outer or free ends of
this plunger 5 may be of different lengths to ac- 30
commodate different requirements to which the
circuit breaker may be put.
Preferably the inner end of the plunger 5 is
provided with a wedge or conical shaped portion
88 at 5'.
I provide a transverse opening 6 adjacent the
inner end of the opening l. 'i and 1' are caps.
of insulating material, as glass or porcelain,
threadedly engaged in the body portion 3 at the
respective ends of the opening G. Conductor 40
wires 8 and 8' extend through openings suitably
formed in caps 1 and l' respectively, the inner
ends of the caps being provided with sockets to
receive the opposite ends of a carbon, destructi
ble Conductor or fuse 9. The ends of the respec- 45
tive Conductor wires 8 and 8' may be frayed and
spread out to provide a good contact between
such ends and the respective ends of the carbon
destructible conductor or fuse 9 when the caps
are threaded inwardly to their normal ?xed po- 50
sition, in which position they provide a tight
engagement against the opposite ends of the car
bon destructible conductor or fuse 9. I provide
an opening transverse of the body portion 3 and
which extends across the opening 4. An opening 55
of similar size and registering therewith (when
the plunger is in normaloperative position) is
provided in the inner end of the plunger 5. A
bolt or shearing pin |0 of a predetermined shear
CR ing strength according to the makeup of the
herein-described circuit breaker and the particu
lar purpose for which it is to be used, is inserted
through these last mentioned openings. If de
sired, this shearing pin |0 may be provided with
10 a threadedly engaged nut ll. Upon impact to
the plunger 5, the pin |0 will be she'ared and the
wedge or conicai shaped end of the plunger 5 will
break and disengage the carbon destructible con
ductor or fuse 9 from its normal electrical con
15 duction position.
A's a matter of protection, I provide a means to
eliminate the use of undesirable shearing pins
which are not of the proper predetermined shear
ing strength and to eliminate unauthorized tam
20 pering with the respective parts of my circuit
of the same as the body portion and these
brackets will materialy change in shape and de
sign according to the particular make-up of _the
entire circuit breaker for the manyivarious and
particular uses to which a circuit breaker, as CI
hereinbefore described. may be advantageously
Referring to Fig. 2, I provide a cap 'la through
which the conductor 8a extends.
|9 is a ?exible
?ngered socket, adapted?to receive the end of 10
the carbon destructible conductor or fuse 9. This
socket |0 is engaged to the inner end of the cap
'la by means of the screw 20 engaging together
the end portion of the socket |9 and the uncov
ered end of the conductor 0a both of which are
jammed between the head of the screw 20 and the
inner end of the cap 'la into which the screw 20 is
threadedly engaged. ,
The foregoing specification and annexed draw
ing disclose the preferred embodiment of my
breaker, I provide a sealing meansl for the caps invention but it is to be understood that minor
1 and 'I' consisting of a Wire |2, the opposite × changes may be resorted to in the commercial
ends of which extend downwardly through small adaptation of my invention without departing
adjacent oppositely registering holes in the cap from the spirit of the invention as hereinafter
1, _body portion 3 and cap 'l'. The protruding claimed.
What I claim as new is:
ends of the wires are provided with any type de
An impact electric circuit breaker comprising
sign of seal ll. Protruding from the body por
tion 3, I provide integral lugs |5, which have a body portion formed with a longitudinal slot
terminating in a. wedge-shaped end within the
openings formed therein registering with an open
30 ing formed in the protruding end of the shearing body, aplunger slidable in said slot, the walls of
pin |0, as shown in Fig. 1. A wire IG extends said slot adjacent the wedge shaped end having
through the openings in the lugs IB and the end a transverse hole therethru said hole passing
of the shearing pin |0, the free ends of such wire thru the slotted portion, said plunger having its
being brought together and sealed with any type ends formed respectively with a wedge shaped
termination designed to ?t the wedge shaped end
or design of seal I'l.
In Fig. 1 of the drawing forming a part of this of said slot and the other end extending beyond
application, I have shown' brackets l8 attached the body portion to receive an impact, removable
to the opposite ends of the body portion 3. The terminal plugs carried in the ends of said trans
brackets |8 which I have illustrated are of a verse hole, a rupturable conductor connecting the
ends of said terminal plugs and extending across
40 most simple L-shaped form. These are only il
lustrative of a holding means whereby the circuit the slot in the path of the plunger, a shearing
breaker hereinbefore described may be attached pin passing thru the body portion and plunger
to another object or article. I do not wish to be to determine the force necessary to operate the
limited to these holding means being detached circuit breaker and means for sealing said ap
or integral with the body portion 3 nor do I wish paratus against unauthorized tampering.
to be limited to any particular shape or design
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