US768959A - Trolley-wheel. - Google Patents

Description

PATENTED AUG. 30, 1904.

F. STRAIL.

TROLLEY WHEEL.

APPLICATION FILED JUNE 1, 1903.

N0 MODEL.

No. 768,959. Patented August 30, 1904.

UNirEn STAT-Es PATENT FFICE.

FREDERICK STRAIL, OF ROCHESTER, NEW YORK, ASSIGNOR OF THREE- FOURTHS TO ALFRED GREEN, GEORGE W. HOOPER, AND CHARLES L. HOOPER, OF ROCHESTER, NEW YORK.

TROLLEY-WHEEL.

SPECIFICATION forming part of Letters Patent No. 768,959, dated August 30, 1904. Application med June 1,1903. Serial No. 159.678. (N model.)

T 0 107mm it y concern! ing surface 6, upon which or against which Be it known that I, FREDERICK STRAIL, a the trolley is adapted to bear and through 0 citizen ofthe United States,residingatRocheswhich electrical contact with the car is made ter, in the county of Monroe and State of New in the usual manner. In the ordinary trol- 5 York, have invented new and useful Improveley-wheel the walls of the circumferential ments in Trolley-\Vheels, of which the followgrooves are straight or commonly inclined ing is a specification. outward, and thus it will be readily seen that 55 My invention relates to improvements in the moment the wheel comes to a curve the trolley-wheels. wire rides up on the inclinedor beveled Walls,

The object of my invention is to provide a and thus the trolley-wheel jumps from the trolley-wheel which is adapted to run on the trolley, and my invention is particularly deoverhead trolley-wire, whether on top or besigned to obviate this annoyance and delay 6 neath the trolley-wire, also to be used on the caused thereby. The trolley-Wheel A has the underground trolley-wire the same way, or on conveXed surface G adjacent the inner cirr 5 any copper bar or rod carrying a current to cumferential bearing-surface and the inner operate a motor. and is more specifically conside Walls of said circumferential groove E structed to prevent the same from leaving are concaved at H, which extends from the 5 the wire on curves or passing switches, and convexed portion G to the outer edge of the this is accomplished by the specifically-conwheel. The said walls being concaved greater 2o structed trolley without additional means or at the portion 7L, they thus form a more abattachments carried by the harp, which are rupt shoulder at h. ordinarily used for preventing the trolley- In trolley systems at curves and switches 7 wheel from jumping off the trolley. the trolley-wire is slightly curved to form the Another object of my invention is to pronecessary curve to correspond with that of vide a more simple, cheap, and effective trolthe rails, and while the trolley-wheel is travley-wheel to accomplish the above-referred-to eling on the straight portion of the track the results than has heretofore been produced. trolley rests in the central concaved portion In the accompanying drawings, Figure 1 is e in engagement with the trolley, and when a top plan view of my improved trolley-wheel, the wheel engages the curved portion of the 30 showing it passing a curve and the trolley trolley the said trolley will ride up on the wire shown in dotted lines. Fig. 2 is a verconvexed surface G and into the concaved tical sectional view taken on line as m of Fig. portion H, and thus it will be seen that a 1. Fig. 3 is a vertical sectional view taken portion of the curved trolley-wire rests in on line 3 y of Fig. 1. said groove H, as clearly shown in Fig. 2,

3 5 Referring now to the drawings, A repre and the wire or trolley cannot be forced sents my improved trolley-wheel, the outer therefrom on account of the wire being portion of which may be of any desired curvacurved, and any upward pressure of the wire 5 ture, but is preferably of that shown*that or downward movement of the trolley-wheel is, with the central or circumferential recess would bring the trolleyin engagement with 4 in its sides for the purpose of making the the abrupt portion h, and thus it will be seen wheel lighter and also for the purpose of sav' that it will be almost impossible to withdraw ing metal. The wheel is provided with the the trolley-wheel from the trolley-wire while 9 usual opening C, by means of which it is roon curves. tatably mounted upon a spindle D, and thus Having thus described my invention, what 45 it is allowed to rotate in the usual manner. I claim as new, and desire to'secure by Letters The outer periphery of said wheel A is pro- Patent, is vided with acircumferential groove E, which 1. A trolley Wheel having a peripheral has at its inner end a concaved trolley-beargroove adapted to receive the wire, the inner faces of the side walls of said groove being concaved.

A trolley wheel having a peripheral groove adapted. to receive the wire, and having an inner circumferential bearing-surface for said wire and the inner faces of the side walls of said groove being eoncaved.

3. A trolley wheel having a peripheral groove adapted to receive the wire, said groove having a contracted inner wire-bearing surface, and the inner faces of the side walls of said. groove being concaved.

4:. A trolley wheel having a peripheral groove adapted to receive the wire, said groove having a contracted inner wire-bearing surface, and the inner faces of the side walls being concaved from said contracted wire-bearing surface to the outer periphery of said wheel.

5. A trolley wheel having a peripheral groove provided with side walls bent inward at the outer periphery thereof.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

FREDERICK STRAIL.

\Vitnesses:

J OHN E. MAHER, Crms. R. KING.

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