US1691993A - Chaeies b - Google Patents

Description

CHARLES B. ROGERS, or JOPLIILMISSQUBI.

PULL-EY.

Application filed March 12, 1925, *Sefial-Nol15j127.

' This invention relates to pulleys, and more particularly to a pulley adapted for use in conncctlonwith thelower end of'anelevator Lei. 7 En concentrating plants where crushed rock must be raised for gravity treatment, the elevator belts and pulleys are subjected to considerable wear due to the fact that the water and crushed material, which is spilled by the elevator buckets,'finds its waybetween the lower pulley and'the belt and has an abrasive action thereon. The lower-pulls :operates in .a pit submerged or partial submerged'in water and crushed material fi-nds its way between the belt and pulley.

While the pulley forming the subject matter of the present invention is not necessarily restricted in use to thelower pulleys of elevator constructions, it is particularly adapted for this purpose and designed to reduce to a minimum the lodgement of crushed material between the belt and pulley and thus lessen the wear on the belt.

An object of the invention is the provision of a pulley that will effectually guide the lower end of the elevator belt with the least friction compatible with operation.

A further object is the provision of a pulley in which the partsmay be quickly and easily replaced, in case of injury or due to normal wear, without discarding the entire pulley.

A further object is the provision of a pulley that can be cheaply manufactured and by reason of the uniformity of wearing, parts may be replaced and maintenance reduced to a minimum cost.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing:

Figure 1 is a front elevation of the pulley,

Figure 2 is an end elevation,

Figure 8 is a fragmentary perspective View of a portion of the pulley, parts being shown in section, and,

Figure at is a perspective view of a portion of one of the pulley units.

Referring to the drawings, numeral 1 designates a the reference the gudgeons extend outwardly to form a bearing shaft for the pulley. The hubs may hub, one of which isem loyed at each end of the pulley, as shown "bemountedon a continuousshaft, if desired,

as the'm-ounting of-the hub forms no part of the invention.

A plate or disk 6 is carriedlby eachof the hubs and radial arms 17 are secured :to these disks by means of bolts 8. As shown, the

which form the periphery of thepulley. "The arms are preferably formed of steel or sim1- A shoe 14: is secured to the peripheral portion 9 of the radial arm and is provided with side flangeslii. As shown, the projecting portion 13 of the side protecting plate extends between the flanges of the shoes. The shoe is secured to the arm 9 by means of bolts 16 which, as shown, are received in counter-sunk openings 17 to give a smooth upper surface. As shown, in Figure 4 of the drawings, the shoe may be slightly elevated at its longitudinal center, the point where the belt centers in operation.

The operation of the device will be apparent from the foregoing description. By providing the plurallty of units, a skeleton pulley is formed which materially reduces the possibility of crushed rock and water lodging between the belt and the pulley and thus causing undue wear. It will be apparent that any part of oneof the units'may be readily and quickly replaced, and that when the shoes become worn in normal use, they may be readily replaced.

It is to be understood that the form of my invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

I claim:

1. In a device of the character described, a pair of spaced coaxial hub plates, a plurality of circumferentially spaced U-shaped members arranged between said plates, said members having their base portions arranged outwardly of said plates and their arms extending inwardly radially with respect to said plates and secured thereto, reinforcing members carried by the arms of said U-shaped radial arms 1 are substantially U-shaped rand are provided with peripheral members I9 members between the outer edges of said plates and the outer ends of said arms, and relatively heavy shoes secured against the outer faces of the base portions of said U- shaped members and extending substantially throughout the length thereof.

2. In a device of the character described, a pair of spaced coaxial hub plates, a plurality of circumferentially spaced U-shaped members arranged between said plates, said members having their base portions arranged outwardly of said plates and their arms eXtending inwardly radially with respect to said plates and secured thereto, reinforcing memof saidreinforcing members being provided with flanges embracing the edges of the arms of said U-shaped members, and relatively heavy shoes secured againstthe outer faces of the base portions of said U-shaped members and extending substantially throughout the length thereof.

3. In a device of the character described, a

pair of spaced coaxial hub plates, a plurality of circumferentially spaced U-shaped members arranged between said plates, said members having their base portions arranged outwardly of said plates and their arms extending inwardly radially with respect to said plates, and the outer ends of said arms, each 7 of said reinforcing members being provided with flanges embracing the edges of the arms of said U-shaped members, and relatively heavy shoes secured against the outer faces of the base portions of said u-shaped members and extending substantially throughout the length thereof, each of said shoes being provided in its inner face with a longitudinal groove receiving the base portion of the correspond ng U-shaped member.

In testimony whereof, I aflix my signature.

CHARLES B. ROGERS;

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