US640810A - Trolley-wheel. - Google Patents

Description

No. 640,8l0. Patented Jan. 9, moo.

a. B. RAUM, .ln.

TROLLEY WHEEL.

(Application filed Oct 5, 1898. (No Model.) 2 Sheets-Sheet I.

e i fl 5 WITNESSES: INVENTOR R 0 T N E V N Patented Jan 9, I900 G. B. RAUM, In.

TROLLEY WHEEL. (Apphcatxon filed Oct 5 199a 2 Sheets-$heat 2.

(Nb Model.)

WITNESSES} %z W UNITED STATES PATENT OFFICE.

GREEN BERRY RAUM, JR., OF NEW YORK, N. Y.

TROLLEY-WH EEL.

SPEGIFICA TION forming part of Letters Patent N 0. 640,810, dated January 9, 1900.

Application filed October 5, 1898- To all whmn it may concern:

Be it known that I, GREEN BERRY RAUM, J r., a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Trolley- W'heels; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that class of devices Which are commonly known as trolleywheels and which are carried upon a moving arm and in contact with a wire from which the electric current passes through the wheel to the arm.

The object of my invention is to provide a simple and improved trolley Wheel of this character which will possess advantages in point of inexpensiveness, economy, lightness, durability,convenience, effectiveness, mutual support of parts, and general efficiency and which will provide for substitution in the parts liable to wear, but without lubricating device or oil-cup, such as has heretofore been patented.

In the drawings, Figure l is a perspective view of a trolley-wheel embodying my improvements. Fig. 2 is a transverse sectional View. Fig. 3 is a sectional view taken on a longitudinal plane. Fig. 4 is a perspective view showing the bushing and one of the face-plates detached.

It has been found difficult in the practical manufacture of solid-cast trolley-wheels to accurately center the bore or opening for the bushing. Therefore the wheel is not truly centered with respect to the trolley-wire, and the trolley-wire does not bear truly and directly at the base of the groove. My invention is designed to overcome this objection and disadvantage, as well as other general objections which have heretofore been met with in the practical manufacture and operation of trolley-wheels, by forming a trolley-wheel in separate parts securely but detachably connected in such a manner that the substitution of the parts most liable to wear can be conveniently effected, the bushing-bore adjusted with absolute accuracy with respect to the grooved rim, the wheel rendered comparatively light Serial No. 692,760- (No model.)

by the elimination of the solid interior or middle weight of metal, and the peripheral flanges fully braced against any tendency or liability to breaking down or bending.

To these ends my invention consists in the improved construction and arrangement of parts, substantially as hereinafter more fully described, and particularly pointed out in the claims.

Referring to the drawings, A designates the grooved rim, which'in its general features and characteristics is similar to the body portion of the ordinary solid trolley-wheel. The rim A, however, in my invention has its outside faces cut away or concaved, as at a, so that a central web a is formed, in which is provided a central eye or opening a and at the outer edge or circumference of the cut-away or concaved faces a is provided a recess or shoulder a which extends annularly imme diately'beneath the edge or apex of the pe ripheral flanges a. The cut-away or concaved parts of the grooved rim A form a hollow middle or intermediate space in the completed Wheel, as shown at s. The central web a provides a firm and effective base for the bottom of the groove of the rim A, and the sides of the wheel are formed by circular plates or disks B B, which close the spaces 8 and are received within the annular shoulder or recess a and have their periphery?) corresponding to and seated against said shoulder or recess, so that the face-plates form a supporting-base, preventing breaking down or bending of the peripheral flange a.

C designates the hub or bushing, which extends transversely through the Wheel, the side plates B B, and the central opening a of the grooved rim A, and consists of a block having a central longitudinal cylindrical bore 0, which forms the bushing or bearing of the trolley-wheel. The central portion of the member 0 is preferably exteriorly rectangular or angular, as at c, and the central opening a in the web a of the grooved rim is preferably of corresponding angular contour, whereby the grooved rim A is locked, thereby preventing independent rotary movement with relation to the hub member 0.

In lieu of the construction just described the securing of the grooved rim member and the hub member together and against inde pendent movement may be accomplished in any other suitable manner.

The ends .0 c of the hub member 0 pass. through corresponding openings b in the side plates, and these openings, as well as the ends 0 0 are preferably cylindrical, as shown. To

connect the hub and side plates against independent rotary movement, the plates are preferably provided upon their inner faces with flanges or projections 6 which receive or engage with the rectangular or angular central portion 0 of the hub. lt will be noted that the reduced cylindrical ends 0 form shoulders, as at c upon the hub, against which the side plates abut, by means of which construction the hub is firmly braced in position between the side plates.

D designates bolts which are passed transversely through the trolley-wheel and are accommodated in openings 0 0', respectively formed in the central web portion of the grooved rim and in the side plates, said openings being on a plane adjacent to the plane of the sides of the hub. The bolts carry a nut d, which is preferably seated against a shoulder or, provided on aflange or enlargement e, which projects laterally at the outer side of the face-plate and surrounds the cylindrical end of the hub, whereby said nuts will be locked in position when the bolts are screwed home, and are thus retained against turning. These bolts preferably have a screwhead cl and operate to secure the face-plates and the hub firmly in their relative positions in connection with the grooved rim or body portion A of the wheel.

' The operation and ad vantages of my invention will be readily understood by those skilled in the art to which it appertains. The various parts of the wheel are readily separable to enable substitution in those parts which are subject to wear, and the grooved rim has its peripheral flanges firmly braced and sustained by the side plates against breaking down or bending. The improved construction of the wheel in separate parts not only results in the secure bracing of the points liable to strain and damage in operation and the true'centering of the hearing, but also enables a hollow construction, by which comparative lightness is attained.

I do. not desire to be understood as restricting myself to the details of construction and arrangement or to the specific manner of securing the separable parts of the wheel together and in relative position as herein shown and described, it being manifest that numerous variations and modifications may be made in these specific details. I therefore reserve the right to all such variations and modifications as properly fall within the scope of my invention and the terms of the following claims.

Having thus described my invention, I claim and'desire to secure by Letters Patent- 1. An improved trolley-wheel comprising a grooved rim member, with its outside faces ooncaved, and provided with a shoulder extending annular-1y immediately beneath the edge of the peripheral flanges, affording a smooth unbroken surface for contact with the wire, a separable hub member and separable side members joined to the hub and extending up to and fitted into the shoulder of the grooved rim member, and mounting the same in relative operative position, affording mutual support of parts, substantially as and for the purposes set forth.

2. In an improved trolley-wheel, the combination of the grooved rim A, having its outside faces concaved as at a, and a shoulder, a extending annularly immediately beneath the edges of the peripheral flanges a, with the circular plates or disks, B 13, having their periphery h corresponding to and seated against the shoulder a the hub C; the bolts D, with nuts (2, and screw-heads d, all substantially as and for the purposes herein set forth.

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

GREEN BERRY RAUM, JR.

Witnesses:

EDWIN LOUIS GARVIN, RALSTON FLEMMING.

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