US878653A - Trolley-pulley. - Google Patents

Description

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TROLLEY PULLEY.

APPLICATION 311,211 SEPT.26.1906.

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UNITED STATES PATENT OFFICE.

EMANUEL .T. MATTHEWS AND ROBERT C. GRUWELL, OF STOCKTON, CALIFORNIA.

TROLLEY-PULLEY.

Specification of Letters Patent.

Patented Feb. 11, 1908.

T 0 all whom it may concern:

Be it known that we, EMANUEL J. MAT- THEWS and ROBERT OGRUWELL, citizens of the United States, and residentsof Stockton, county of San Joaquin, State of California, have invented certain new and useful Improvements in Trolley-Pulleys; and we do declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and the characters of reference marked thereon, which form a part of this specification.

This invention relates to trolley pulleys for electric .lines or for tramways, our main object being to provide a pulley which will remain in contact with the wire and not keep jumping off the same no matter at how high a rate of speed the vehicles may run. This object we accomplish by means of a plurality of spokes rotatably arranged in connection with the pulley proper adapted to hold the pulley on the wire and still permit the same to pass the cross wires or supports. Also by such other and further construction as will appear by a perusal of the following specification and claims.

In the drawings similar characters of refer ence indicate corresponding parts in the several views.

Figure 1 is a side elevation of the device. Fig. 2 is a sectional side elevation of the same. Fig. 3 is a view of a wire hanger.

1 designates the wire on which the pulley, supported by the holder 3, bears, said pulley belng mounted on a shaft 4 journaled in said holder 3. sides of said pulley 2 are" hubs 5 provided with a series of spokes or fingers 6 said hubs being insulated from the shaft 4 by means of suitable material 7.

On the outer end .of each of the spokes 6 is journaled a small roller 8.

9 are metal plates provided with small flanges 10 on their lower sides on which the rollers 8 are adapted to bear, said plates 9 being secured together by means of cross pieces 11. Extending through the center one of said cross pieces is a threaded pin 12 provided with a Wing nut on the upper end thereof and said pin being secured to a frame 14 at the lower end in which frame are journaled two small pulleys 15 bearing on the 7 upper side of the wire 1 and held securely in Mounted on Said shaft 4,on both connection therewith by means of a spring 16 encircling the pin 12, the tension of which is regulated by means of the wing nut 13.

In using our invention a hanger 17 must be used for holding the wire 1 to permit the device to pass over the cross wires 18.

In practice the spokes 6 prevent the wire 1 from jumping from thepulley 2 and yet when they come to a cross wire they engage the same and rotate and disengage themselves, the pulleys 15-also forming a more secure lock for the said wire.

When the device is used simply for electric lines the pulleys 15 and their parts may be left ofi the same as the spokes 6 will be all that is required to keep the wire 1 within bounds. 1.

In connection with using the device on tramways or steel overhead railways the device is inverted and the cars depended from the parts 9 all the weight falling on the rollers 8 and spokes 6. This is of very great advantage as it pulls directly on a deadcenter on the wire thus doing away with the inconveniences occasioned by the use of the side hanger as is now the case in tram ways.

The above is a description of the details of construction of the present and preferred embodiment of our invention. Many small deviations from the exact detail of such construction may be resdrted to however without departing from the spirit of our invention.

Having thus described our invention what we claim as new anduseful and desire to secure by Letters Patent is:

1. A device of the class described comprising a holder and a shaft journaled in said holder, a pulley mounted on said shaft and adapted to travel beneath a trolley wire, a plurality of radiating arms mounted for rotation upon said shaft at each side of said pulley, a frame having guide pulleys spaced apart and adapted to travel above the trolley wire, a frame having spaced sides and between which the terminals of said radial arms forth.

said rollers bearing on said flanges, as set 3. A device of the character described comprising a holder, a shaft journaled therein, a pulley mounted on said shaft, a series of arms rotatably mounted on said shaft, small rollers journaled on the ends of such arms, two metal plates secured together by cross pieces, flanges on the lower edges of said plates, said rollers being adapted to bear l on said flanges, a threaded pin mounted in the center one of said crosspieces and provided I with a wing nut on the upper end thereof and a frame on the lower end thereof a spring coil encircling said pin, and two small pul- 15 leys rotatably mounted on said frame, as set forth.

In testimony whereof we affix our signatures in presence of two witnesses.

EMANUEL J. MATTHEWS. ROBERT C. GRUWELL. Witnesses:

PERCY S. WEBSTER, JosHUA B. WEBSTER.

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