US364498A - Pulley for cable railways - Google Patents

Description

(No Model.)

" E. D. DOUGI-IERTY.

PULLEY FOR CABLE RAILWAYS.

N0. 364,498. PatentedJune 7, 1887.

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Hfilllllllllllllll UNITED STATES PATENT OFFICE.

EDYVARD D. DOUGHERTY, OF PHILADELPHIA, PENNSYLVANIA.

PULLEY FOR CABLE RAILWAYS.

srncrrrcnrron forming part a Letters Patent No. 364,498, dated June '1, 1887.

Application filed August 521, 1886. Serial No. 211,564. (No model.)

To aZZ whom it may concern.-

Be it known that I, EDWARD D. DOUGH- ERTY, of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Pulleys for Cable Railways; and I do hereby declare the following to be a full, clear, and exact description. of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to an improvement in pulleys for cable railways, and more particularly such pulleys as are employed in turning curves, the object of my invention being to produce a pulley which shall be capable of lasting longer under wear than those heretofore provided for this class of wear, and one which shall be readily removed when unfit for wear, and replaced in proper condition for effective service.

To the above purpose my invention consists in the eombination,with a pulley having a pair of recesses contiguous to and opening out upon each of its marginal edges, of a pair of wearing-rings fittingiinto said recesses, as hereinafter described and claimed.

My invention further consists in certain pe culiar and novel features of construction and arrangement, as hereinafter described and Figure l is a face elevation of a pulley con structed in accordance with my invention. Fig. 2 is a central transverse section of the same. Fig. 3 is a cross-section of a tractionrailway bed with my improvements applied.

In traction-railways in which the tractioncableis guided around curves by pulleys lo cated within the trough and placedin pairs at right angles to each other each pulley in the trough or tunnel is worn at one edge of its circumference only. Thus such pulleys become rapidly unfit for use and have to be constantly replaced. As will be seen from the ensuing description, I avoid this defect and produce a pulley which will not only last much longer than the pulleys heretofore employed in this class of railways, but one which may be caused to double its increased usefulness by being reversed in position, and which may be also readily refitted for further use.

In the said drawings, A designates one oi. a number of pulleys which are designed for use on the curved portions of traction-railways, as shown in Fig. 3. This pulley is formed with an annular boss, A, encircling the center of the pulley at its circumference, as shown. B B designate a pair of metallic wearing-rings which embrace the periphery A at each side of the central boss, A, of said pulley, and A designates a number of screws which securethe wearing-rings to the boss in such manner as to maintain their position upon the periphery of the pulley. These screws each extend through semicircular recesses a in the periphery of the pulley and similar recesses in the inner surface of each ring 13, and the inner ends only of said screws are threaded to enter internallythreaded sockets a, which are formed in the sides of the boss A. Thus it will be seen that the ringsB may be readily attached to and removed from the peripheries of the pulleys. It will also be seen by referring to Fig. 3 that the wear of the cables'O 0 comes only on the meeting edges of the pulleys A, and that said pulleys may be readily reversed to present thei r opposite edges to each other, thereby doubling the length of wear of the pulleys.

When both wearing-rings of each pair of pulleys have become worn out, such pulleys are to be removed and new wearing-rings substituted for the old ones, after which the pulleys are to be replaced in operative position.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. An improved pulley for the cables of traction-railways, having metallic, wearing rings secured upon its periphery at the opposite margins thereof, substantially as de scribed.

2. An improved pulley for cable railways, having a central boss and a metallic wearing ring-removably secured upon one side of said boss contiguous to the edge of the periphery of the pulley, substantially as set forth.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

EDWARD D. DOUGHERT r.

Witnesses:

ROBERT N. Snurnns, J. McGREooR GIBB.

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