US732009A - Circuit-breaker-operating system. - Google Patents

Description

No. 732,009. PATENTED JUNE 23, 1903. W. B. POTTER i C. D. CLARK. CIRCUIT BREAKER OPERATING SYSTEM.

APPLICATION FILED JAN. 11| 1902.

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UNITED STATES Patented June 23, 1903.

PATENT OFFICE.

WILLIAM B. POTTER, OF SCHENECTADY, NEW YORK, AND CLARENCE D. CLARK, OF BERKELEY, CALIFORNIA, ASSIGNORS TO THE GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

CIRCUlT-BREAKER-OPERATING SYSTEM.

SPECIFICATION forming part of Letters Patent No. 732,009, dated J une 23, 1903.

Original application filed October 3l, 1900, Serial No. 35,003.

To all whom it may concern:

Be it known that we, WILLIAM B. POTTER, residing at Schenectady, county of Schenectady, State of New York, and CLARENCE D.

5 CLARK, residing at Berkeley, county of Alameda, State of California, citizens of the United States, have invented certain new and useful Improvements in Circuit-Breaker-Operating Systems, of Which the following is a lo specification.

Our invention relates to circuit-breaking devices; and it consists in providing such a device with an actuating device and with means controlled by the flow of current in au electric circuit for bringing the actuating device and the circuit-breaking device into operative relation with one another.

The present application is a division of our application, Serial No. 35,003, tiled October 2o 3l, 1900, in which the present invention is applied to a motor system in combination with a braking system therefor. In this application We aim to cover the particular combination specified as our invention irrespective of the character of the operating system in connection with which it may be used.

In embodying our invention in practical form We provide the circuit-breaking device with an Vactuating device operatively con- 3o nected to any suitable operating system, and in connection with the actuating device we employ some means. whereby it will ai'fect the circuit-breaking device only in case current is flowing through the same when the actuating device is operated. By this arrangement We are enabled to secure animmediate openiug of the circuit-breaker whenever the actuating device is operated while current is still flowing in the circuit in 4o which the circuit-breaker is included, while if this circuit has been already opened at another point the circuitbreaking device will not be operated. The actuating device which is shown in the drawings is a plunger which is attached to a piston in a cylinder and is adapted to be operated by airpressure. The circuit-breaking device which We have shown is an automatic circuit- -auxiliary armature and pivoted dog.

Divided and this application filed January 11, 1902. Serial (No model.)

breaker provided with a tripping device carrying a member arranged to be projected into 5o the path of movement of the actuating device whenever current is iiowing through the circuit-breaker contacts. The electricallyactuated member, which is arranged to be projected into the path of movement of the actuating device, consists, in the particular construction which we have illustrated, of a pivoted dog mounted on the tripping device and connected to an auxiliary armature capable of being attracted by the overload-coil 6o of the -circuit-breaker a'ud thereby tilted into the path of movement of the plunger, which constitutes the actuating device.

In the operation ot our invention Whenever the plunger is actuated while current is flowing it will strike the dog, depressing the tripping device of the circuit-breaker, and thereby releasing the switch-lever. It', however, current is not dowing through the circuit-breaker when the actuating device is op- 7c erated, the dog will be out of the path of movement of the plunger and the device will be rendered inoperative to open the circuitbreaker.

In the accompanying drawings, Figure 1 is 75 a view in elevation of a circuit-breaking device provided With our invention. Fig. 2 is a longitudinal section, on a larger scale, of the air-cylinder and plunger constituting the actuating device. Fig. 3 is a plan view of the 8o Fig. 4 is a view showing, on alarger scale, the mounting of the pivoted dog.

The circuit-breaker may evidently be of any desired type, and we have illustrated our invention iu connection with one of the types now in common use, this particular circuitbreaker constituting the subject-matter of a patent to W. B. Potter, No. 533,083, granted January 25, 1895. In this apparatus the bridging contact d is held closed against the contacts d by a toggle d2, which constantly tends to open under the tension of a strong spring d3. A series coil d4 has a pivoted armature d, on which is pivotally and adjustably mounted a tripping device or detent d6 to lock the toggle with the contacts closed. An abnormal current energizes the coil d4, which attracts the armature against'the tension of its supporting-spring di and releases the toggle, thereby allowing the spring da to throw open the switch. In applying our invention to this apparatus we provide an auX- iliary armature E, pivoted on the fulcrum of the armature d5 and free to be attracted by the coil d4. It has a rock-arm e, which is connected by link e'vwith a pin extending from the upper end of a movable member or dog F, pivotally supported on the end of a bar G and adapted to be tilted by the movement of the armature E. The bar G is attached to the detent d6. A light springfretracts the dog against a stop g when the coil d4 is not energized. The air-cylinder H, which constitutes the actuating device, is supported adjacent to the coil d4, preferably bymeans of a bracket 71, attached to the piece upon which the circuit-breaker D is mounted. The upper end of the cylinder is connected with a pipe I, which may be connected to a suitable source of air-supply. In the cylinder is a packed piston L, having a piston rod or plunger IWI projecting through the lower head II' of the cylinder. A helical springN abuts against the under side of the piston. Its lower end is supported adjustably for tension preferably by the head H', which may be cupped and screwed into the lower end of the cylinder and held by a locking-nut h'. The end of the plunger may be provided with a head m. In the side of the cylinder is an exhaust-port h2.

The operation of our device is as follows: The armature d5 is not in liuenced by a normal current in the coil d4; but the auxiliary armature E is attracted and tilts the dog forward so long as the current remains turned on. When air is supplied to thepipe I, the plunger M will be forced downward, and in case current is flowing through the circuitbreaker the plunger in descending will strike the dogE` and drive down the bar G, thereby operating the tripping device d and releasing the toggle of the circuit-breaker. The spring d3 will thereupon instantly open the switch.

What we claim as new, and desire to secure by Letters Patent of .the United States, is-

1. In combination, a circuit-breaker, an actuating device for securing the operation of said circuit-breaker, means for operating said actuating device, and means controlled by the current owing through the circuitbreaker for rendering the actuating device operative to open the circuit-breaker.

2. In combination, an automatic circuitbreaker, a tripping device therefor, an actuating device for operating the tripping device, and electrically-controlled means for bringing the tripping device into operative relation with the actuating device.

3. In combination, an automatic circuitbreaker, a tripping device therefor, an actuating device for operating said tripping device, a member carried by the tripping device and arranged to be projected into the path of movement of the operating device, and an electromagnet operatively connected to said member and having its winding connected in the circuit in which the circuit-breaker is included.

et. In combination, an automatic circuitbreaker, a tripping device therefor, an actuating device for operating said tripping device, a dog carried by the tripping device and adapted to be engaged by said actuating device, and an electromagnet operatively connected to the circuit-breaker circuit for actuating said dog.

5. In combination, an automatic circuitbreaker, a tripping device therefor, a dog mounted on the tripping device, an actuating device for operating the tripping device, and means for maintaining said dog in the path of movement of the actuating device so long as current is passing through the circuit-breaker.

6. In combination, an automatic circuitbreaker having an overload-coil, a tripping device therefor, a dog mounted on said tripping device, an auxiliary armature inuenced by the overload-coil of the circuit-breaker,a connection between said armature and said dog, and an actuating device arranged to engage the dog when the auxiliary armature is attracted by the overload-coil.

7. In combination, an automatic circuitbreaker provided with an overload-coil, a tripping device therefor, a dog pivotally mounted on said tripping device, an auxiliary armature influenced by the overload-coil, a rock-arm on the armature, a link between the rock-arm and the dog, and an actuating device for engaging said dog.

S. In combination, an automatic circuitbreaker, a tripping device therefor, an actuating device comprising a plunger operated by air-pressure, a member carried by the tripping device and arranged to be projected into the path of movement of said plunger, and an auxiliary armature for actuating said member.

In witness whereof we have hereunto set our hands this 21st and 31st days of December, 1901.

WILLIAM B. POTTER. CLARENCE D. CLARK. Witnesses for Potter:

BENJAMIN B. HULL, MARGARET E. WooLLEY. Witnesses for Clark: W. T. Huss, S. E. KEARNEY.

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