Improvements in Combined Automatic Magnetic Circuit Breakers and Resistance Controlling Switch.
Year: 1899

page_text: Date of Application, 10th Fab 1800
Complete Specification Left, 30th Oct., 1899-Accepted, 27th Jan., 1900
Complete Specification Left, 30th Oct., 1899-Accepted, 27th Jan., 1900
PROTIVNAL DIVIFICATION.
[Communicated from abroad by HENRY BENJAMIN CUTTER, of No. 3126, Clifford
Street, Philadelphia, Pennsylvania, United States of America, Electrical
Engineer.]
Improvements in Combined Automatic Magnetic Circuit Breakers and
Resistance Controlling Switch.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare the
nature of this invention to be as follows -
1
This invention relates to automatic-magnetic circuit breakers in combination
with a resistance controlling switch
The said invention comprises a novel combination of automatic-magnetic cir-
cuit breaker, a spring actuated resistance controlling switch and electro-magnetic
means for normally restraining said switch.
The automatic-magnetic circuit breaker consists of separable co-operative con-
tacts, means for causing the separation of the said contacts, means for normally
restraining such separating means and adjustable electro-magnetic means for
actuating the restraining means upon the occurrence of abnormal flow.
The resistance controlling switch consists of a pivoted switch aim, the free
end of which is adapted to successively engage the contacts of a resistance to
close the circuit through said resistance, which is cut out step by step as the
switch arm is advanced. This switch arm is actuated by means of a spiing and
adapted to be maintained in the initial or open circuited position by said spring
when not restrained by the electro-magnetic restraining device.
The electro-magnetic restraining device consists of an electro-magnet so
arranged and fixed that when energized, its poles are adapted to co-operate with
an armature carried upon the resistance controlling switch arm to hold said
switch arm in the position in which all resistance is cut off
In some cases it will be preferable to connect the coil of the circuit breaker,
the resistance controlling switch and the coil of the electro-magnetic restraining
device in the circuit, so that the de-energizing of the said latter coil will be
effected by the opening of the automatic magnetic circuit breaker.
In this case, upon an abnormal flow, the automatic magnetic circuit breaker
will open and the electro-magnetic restraining means will be thereby rendered
inactive whereupon the circuit will be broken by the automatic magnetic circuit
breaker and the resistance controlling switch released so that it will return to
its initial or open circuited position It will therefore be impossible to in-
advertently maintain the resistance cut out without first closing the automatic
magnetic circuit breaker
If after closing the automatic magnetic circuit breaker it is attempted to cut
out the resistance during the continuance of abnormal flow, the automatic mag-
netic circuit breaker will again open the circuit.
i

page_text: It will also be obvious that in case of interruption of current by the stopping
of the generator or breaking of the conductor, the electro-magnetic restraining
means will release the resistance controlling switch and permit it to return to its
initial or open circuited position and thus prevent injury to the translating device
by the sudden starting of the generator or closing the broken conductor.
I thus provide simple and effective means for preventing injury to the trans-
lating device by abnormal flow, either during the manipulation of the resistance
controlling switch or after the circuit is fully established; preventing the resist-
ance from remaining cut out during the interruption of current and thereby
preventing any possibility of turning the current into the translating device
except through the gradually decreasing resistance.
As is obvious from the above description I secure the above advantages with-
out employing complicated inter-locking means for controlling the circuit breaker
which has heretofore been used, nor need I make the switch of the circuit breaker
in any way mechanically dependent upon the movement of the resistance con-
trolling switch.
While I have for example designated a specific arrangement for the electrical
connection of the coil of the automatic magnetic circuit breaker, the resistance
controlling switch and the coil of the electro-magnetic restraining means, I may
obviously vary this arrangement without departing from the spirit of my inven-
tion, and therefore I do not wish to be limited to the arrangement above
described
Dated this 10th dov of FahmuONU 1800
HASELTINE, LAKE, & Co,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
Improvements in Combined Automatic Magnetic Circuit Breakers and
Resistance Controlling Switch.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, London, W.C, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention relates to automatic magnetic circuit breakers in combination
with resistance controlling means.
My said invention comprises a novel combination of automatic magnetic cir-
cuit breaker a spring actuated resistance controlling switch and electro-magnetic
means for normally restraining said switch.
The object of my invention is to provide simple and efficient means for pre-
venting injury to the translating device such as a motor for example by abnor-
mal flow, either during the manipulation of the resistance controlling switch or
after the circuit is fully established; preventing the resistance from remaining
cut out during the interruption of current and thereby preventing any possi-
bility of turning the current into the translating device except through gradu-
ally decreasing resistance
Referring to the drawings Fig. 1 is a plan view of
gramatic view showing the paths of the current
showing the latch for retaining the circuit breaker.
my device Fig 2 is a dia-
Fig. 3 1$ a detail view

page_text: The various elements in my invention may be located upon a suitable base A
preferably of insolating material
The automatic magnetic circuit breaker consists of the switch 1 pivoted at 2
and adapted to engage with the contact 3. Coiled about the supporting pivot
is a spring 4 adapted to cause the separation of switch 1 from the contact 3.
The latch 5 is adapted to engage a pin 5* upon the said switch 1 normally to
restrain its separation from the contact 3.
The solenoid 6 is adapted to actuate the movable core 21 which engages with
a movable pin 7 to release the switch 1. The latch 5 is secured to a pin or rod a
pivoted in a bracket b attached to the base A and to the opposite end of the
said pin or rod is secured a projection c adapted to be acted upon by the pin 7
to raise the latch and release the switch 1. A spring d having one-end attached
to the bracket and the other end to the latch 5 tends to keep the said latch
in its lowermost position so that it will engage with the pin 5* of the switch
A projection 1 on the switch 1 engages with the tail end of the latch when
the switch is in its closed position and when the latch is lifted from the pin 5*
of the switch the said tail end of the latch will.move upward against the projec-
tion 1 and so start the switch 1 The knurled headed screw 19 carried by the
stirrup 20 is adapted to adjust the position of the movable core 21 with respect
to the amount of flow necessary to cause its actuation.
5
The resistance controlling switch arm 8 is pivotally mounted on post 17 so
that its free end 9 is adapted to sweep the exposed contacts 10 of a resistance,
to close the circuit through said resistance, which is cut out step by step as the
switch arm is advanced. This switch aim 8 is provided with a spring 11 coiled
about post 7 and adapted to maintain said switch aim in the initial or open-
circuited position, as shown in Fig. 1, when not restrained by the electro-mag-
netic restraining means.
The electro-magnetic restraining means consists of an electro-magnet 12, so.
disposed and fixed that when energized, its poles 13 are adapted to co-operate
with the armature 14 carried upon the resistance controlling switch arm 8 to
hold said switch arm in the position where all resistance is cut out.
means
It is preferable to connect the coil 6 of the circuit breaker, the resistance con-
trolling switch 8 and the coil 12 of the electro-magnetic restraining means in the
circuit, in which is also included the main switch S as shown in Fig. 2, so that
the deenergizing of the coil 12 of the electro-magnetic restraining
will be effected by the
of
opening
the automatic magnetic
circuit breaker. In this case, upon abnormal flow, the automatic magnetic cir-
cuit breaker will open and the electro-magnetic restraining means will become
inactive and release the resistance controlling switch and allow it to return to its
initial or open-circuited position, and it will therefore be impossible inadver-
tantly to maintain the resistance cut out without first closing the automatic
magnetic circuit breaker
If after closing the automatic magnetic circuit breaker it is attempted to cut
out the resistance during the continuance of abnormal flow, the automatic mag-
netic cucuit breaker will again open the circuit
It will also be obvious that in case of interruption of current the electro-magne-
tic restraining means will release the resistance controlling switch and permit
it to return to its initial or open-circuited position and thus prevent injury to
the translating device such as the motor M by the sudden re-establishment of
the circuit.
By the means above described I dispense with the need for inter-locking means
for controlling the circuit breaker or the need for having the switch of the cir-
cuit breaker in any way dependent upon the movement of the controlling switch.
While I have for example designated a specific arrangement for the electrical
connection of the coil of the automatic magnetic circuit breaker, the resistance
controlling switch and the coil of the electro-magnetic restraining means
may obviously vary this arrangement without departing from the spirit of my
I

page_text: invention, and therefore I do not wish to be limited to the exact arrangement
above described.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :-
1. The combination of a spring actuated resistance controlling switch, electro-
magnetic means for normally restraining the same, and an automatic magnetic
circuit breaker, the coil and switch of which carry the motor actuating-current.
2. The combination of a spring actuated resistance controlling switch, an auto-
matic magnetic circuit breaker the coil and switch of which carry the motor-
actuating-current, and electro-magnetic means, the circuit of which is controlled
by the circuit breaker, for normally restraining the resistance controlling switch.
3. An automatic magnetic circuit breaker consisting of separable co-operative
contacts, means for causing their separation, means for normally restraining
the separating means and electro-magnetic means for actuating the restraining
means, in combination with a spring actuated resistance controlling switch in
series with the contacts of the circuit breaker, but mechanically independent of
the circuit breaker, and electro-magnetic means for normally restraining the
resistance controlling switch, substantially as described.
Dated this 30th day of October 1899
HASELTINE, LAKE, & Co,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.