US786795A - Trolley-wheel. - Google Patents

Description

UNITED STATES Patented April 11, 1905.

PATENT OEEICE.

TROLLEY-WHEEL.

SPECIFICATION forming part of Letters Patent No.786,795, dated April 11, 1905. Application ledfluly 28, 1904. Serial No. 218,524.

To all whom it may concern.'

Be it known that I, EDWIN W. CLARK, a citizen of the United States, residing at Columbus,

in the county of Museogee and State of Greoroperated trolley-wheel, one that will adjust itself to all conditions of actual service Without losing contact with the conducting-wire and one that will not wear out the wire, more especially in passing around curves or where the wire is not over the center of the track or Where the car rocks.

With these objects in view my invention consists in the construction Vand combinations of parts, as hereinafter described and claimed.

Inl the accompanying drawings, Figure l represents an end View of my improved trolley-wheel. Fig. 2 is a side view thereof, and Fig. 3 is a longitudinal horizontal section.

o represents the supporting-pole forked in lthe usual way and terminating in two upwardly-projecting arms b. Each of these arms is provided'with a bored-out portion c, in which is inserted waste d for the purpose of oiling ythe same, the oil being supplied through the hole e. By this simple means the bearings of the wheel are always kept lubricated. The top of each of the'arms Z) is recessed in the form of a semicircle to form a bearing for the `shaft f of the trolley-wheel proper, and a cap-piece g, fastened by screws i, serves to hold the wheel in position inthe arms b, the construction being the same on both sides of the wheel.

' The shaft f of the trolley-wheel has made integral with it on its center the drum c', provided with a semicircular depression j, in which the conducting-wire engages under ordinary circumstances. however, that this depression should be used, as the outer surface of the drum t' may loe It is not necessary,

perfectly cylindrical, if desired. The drum?l is recessed on each side, as shown at 7c, for y the reception of the hubs of the slidable wheelwithV the hub 0 of the ange, which is re-l cessed, as shown at p, one end of the hub, as shown at q, being in contact with the shaft f. This shaft f is screw-threaded, as shown at r,

and on the screw-threaded portion4 is secured a nut s, while a spiral spring t is conned in the space between the head of the nut s and the partq of the huh. The result of this construction is that the wheel-Bange can easily slip outwardly from the position shown in Fig. 2 to that shown is Fig.p3, for example, against the tension of the spring t. In rounding a curve, therefore, one or both of the iianges will slip outwardly and will not tend to bend or cramp the wire, as is the case with the ordinary trolley-wheel. The construction ofthe wheel-flange, spring, and nut is the same on both sides of the wheel. It should be further noted that these Wheel-Hanges revolve freely and easily around the main drum c', the result being that in rounding a curve where the wire is swung' from a position at right angles to the axle f to a position inclined thereto the wheel-iiaiges will slip outwardly and, if necessary, revolve freely on the cylindrical surface c' and axle f. The result of this/construction is that in rounding a curve scarcely no resistance is'offered more than is presented under ordinary conditions, as it is simply necessary to compress the springs t, which are not made very heavy. The same is true when the car rocks, throwing the -wire against one or the other of the wheel-angcs, or when the wire is not exactly over the center of the track.

The springs are located within the trolleywheel throughout and entirely protected from the action of the weather, and the whole makes a very compact, economical, and eflicient trolley-wheel.

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

1. In a trolley-wheel, the combination of supporting-arms and a trolley-wheel mounted therein, said Wheel consisting of a freely-revoluble central axle provided with a drum, and spring-pressed flanges overlapping said drum revolubly and slidably mounted independently thereof on said axle, substantially as described.

2. In a trolley-wheel, the combination of supporting-arms, an axle provided with an enlarged drum revolubly mounted in said arms, flanges overlapping said drum slidably and revolubly mounted independently thereof on said axle, and springs normally tending to press said flanges toward each other, substantially as described.

3. In a trolley-wheel, the combination of supporting-arms, an axle revolubly mounted in said arms provided with screw-threaded portions, said axle being provided with a drum in the center, Wheel-flanges provided with recessed hubs revolu bly and slidably mounted on said axle and said drum, nuts engaging the screw-threaded portion of said axle, and

springs located between said nuts and the hubs of the wheel-llanges, substantially as described.

L. In a trolley-wheel, the combination of supporting-arms, an axle revolubly mounted in said arms and screw-threaded near cach end thereof, a cylindrical drum mounted on said axle, said drum being recessed on each end and provided with a central circumferential groove, wheel-anges revolubly and slidably mounted on said axle and said drum, said wheel-flanges consisting of outer portions provided with inclined faces, a hub and spokes connecting said hub, said hub being recessed for the reception of the springs, nuts engaging the screw-threaded portions of said shaft, and springs located between said nuts and in the recesses of the hubs of the wheel-flanges, substantially as described.

In testimony whereof I aliix my signature in presence of two witnesses.

EDWIN W. CLARK.

Witnesses:

J. STEPHEN GIUSTA, WARREN G. OGDEN.

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