US1475735A - Resistor - Google Patents

Description

Nov. 27 1923.

B. O. AUSTIN RESISTOR Filed Sept. 8. 1921 WITNESSES:

Patented Nov. 27, 1923.

UNITED. STATE PATENT OFFICE.

BASCUM o. AUSTIN, onwrnizmsnuno, rnivlvsrnvenrn, assrenon 'ro WESTINGHOUSE RESISTOR.

Application filed September 8, 1921. Serial No. 499,342.

To all whom it may, concern.

Be it known that I, BASCUM OJAUsriN, a citizen of the United States, and a resident of VVilkinsburg, in the county of Allegheny and State o't Pennsylvania, have invented a new and useful Ii'nprovcment in Resistors, of which the following is a specification.

My invention elates to resistors and it has particular relation to meansfor cooling resistors thatare employed wherethe space therefor is relatively limited, such, for ex ample, as upon electric locomotives.

One object of my invention is toprovide a resistance device that shall be relatively simple and economical in construction and reliable and positive in operation.

Another object ofmy invention is to provide an efficient means for cooling resistors.

l-leretofore, blower devices have been employed to cool the resistors in electric locomotives, when it was desirable to operate such resistors at relatively high eiliciency. The cooling medium has been directed upon the resistors by means of conducting pipes. With this arran ement of the cooling device, there has been some loss of power caused by eddy currents of the cooling medium in the conducting pipes and by the arrangement of the resistors.

Briefly speaking, my invention consists in providing a hollow stack of resistors and mounting a fan or cooling device therein.

The fan drives the cooling medium directly through the resistors without employing any conductors and without a portion of the medium being dissipated in the sur rounding air.

For a better understanding of my invention, reference may be made to the accompanying drawing, p Figure 1 of which is a plan view of a resistance device constructed in accordance with my invention; 7 1

Fig. 2 is a view. in a side elevation, of the device illustrated in Fig. 1;

Fig. 3 is a plan view of a modified form of a resistance device constructed in accordance with my invention; and

Fig. 4 is a view, in side elevation, of the devices illustrated in Fig. 3.

Referring particularly to Figs. 1 and 2 of the drawing, a resistance device 1 comprises a plurality of stacks'of grid resistors 2 arranged to form a ring. A fan 3 is mounted within the opening formed by the resistor 2 and is mechanically connected to the rotor t of a motor. 5 by means of a shaft 6. The resistors 2 are mounted upon a stationary platform 7 by means of bolts 8. The grids are spaced one from another by means of a plurality of insulating washers 9. The resistors 2 are electrically connected by means of copper washers 10.

The stacks of grid resistors 2 maybe connected in series relation one with another or in anyother relation'that may be con sidered desirable for the particular control system in which they are employed. The operation of the resistance device 1 is begun whenever'a plurality of conductors 11, which are connected to the resistors 2, are energized, as the motor 5 is energized simultaneously therewith. by means of switches and suitable interlocking (not illustrated).

The rapid rotation of the fan 3 causes the blades 13, which are of uniform crosssection throughout, to drive the air, or other cooling medium, within the center of the annular resistance device outwardly through the spaces between the individual grid resistors 2. The air is thus driven directly from the blowing device through the interstices between the resistors 2 and, consequently, thereis no loss of power due to eddycurrents or dissipated air pressure.

Referring to Figs. 3 and 4.- of the drawing, like parts are given corresponding numbers.

The stacks of resistors 2 are mounted upon a plurality of rotatable frames 16 and 17 by means of bolts 8 which mechanically connect the frames one to another. The fan 18 is mounted Within the center of the resistance device by means of a" stationary supportingmember 19 which is secured to stationary bearing 20. The frames 17 and 16 are mechanically secured to the shaft 6 and are rotated thereby.

The resistors 2 are energized from conductors 11 through a plurality of slip rings 21. A suitable bearing 22 is provided for the frame 17 to turn upon the frame 6.

The operation of the device illustrated in Figs. 3 and 4: is begun as soon as the conductors 11 are energized as the conductors 12 of the motor 5 are energized simulta neously by means of suitable interlocking upon a plurality of control switches (not shown)- The motor 5 rotates the frames 16 and 17 andthe resistors 2, which are mounted thereon. about the stationary tan 6, thereby causing a double action of the tan and the surrounding atmosphere to cool the resistors 2. It is also apparent that, by means of suitable gearing, it is possible to drive the tan 6 in one direction and to rotate the resistors 2 in the opposite direction.

From the above description, it is apparent that I have provided means for cooling a plurality of grid resistors whereby very high elliciency of the blower device or fan is secured.

While I have shown my invention in the preferred form. it is apparent that minor modifications may be made in the arrangement of the structure without departing vfrom the spirit of my invention.

I desire, therefore, to be limited only by the scope of the appended claims.

I claim as my invention:

1. The combination with a hollow resistor, of a blower device positioned within said resistor, and means for actuating said device.

2. The combination with a hollow resistor, of a tan mounted within said resistor, and means for driving said fan.

3. The combination with a hollow resistor, of a fan positioned within said resistor, and means for securing relative movement of said resistor and said fan.

l. The combination with an annular resistor, of a fan pivotally mounted within said resistor and a motor for driving said fan.

5. The combination with a rotatable resistor, of means for actuating said resistor to effect cooling thereof- 6. The combination with a hollow re '3 tor, of a stationary member mounted therein and means for rotating said resistor.

7. The combination with a plurality of resistors. oi? means for mounting said resis tors to form a hollow bodvand means within said body for driving; a cooling fluid therethrough.

S. The combination with a plurality of grid resistors, of means for mounting said resistors to form. a hollow body, and means for driving a cooling fluid through said body from within.

In testimony whereof, I have hereunto subscribed my name this 25th day of August 1921.

BASCUM O. AUSTIN.

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