US282422A - Pulley - Google Patents

Description

(No Model.)

A. WALTO".

PULLEY.v

Paisented July 31, 1883.

PIE. 2

L D l m v. p n mm2 VUNITED STATES` PATENT OFFICE.

AUGUSTUS WALToN, oF SAN FRANCISCO, oALrFonmA.

PULLEY.

`SPECIIEICATION formingpart of Letters Patent No. 282,422, dated July 31, 1883.A

Application filed April 2.8, 1883. (No model.)

To all whom t'mwy concern:

Be it known that I, AUGUSTUS WALTON, residing at `San Francisco, in the county of `San Francisco and State of California, have invented `a certain new and useful Improvement in Pulleys, of which the following is a specification.

compositepulley, or one composed partly of wood and partly of metal, the rim'of which is adapted to be supported by eXtensible spiderarms placed midway between the hub and rim.

I yaccomplish this object by the means illustrated in the accompanying drawings, in which- Figure l is a section of my improved pulley, taken on line 'X X of Fig. 2.V Fig. 2 is a section taken on line Y Y of Fig. 1.

A is the rim of my pulley, which is constructed of wood, of the desired width and thickness, which is first steamed and then bent to form the rim, and the meeting edges brought together.

In case more than one strip or layer of wood is employed the strips are firmly glued together after steamingin the usual way, and the rim may be made in segments, and twosegments will answer if found to be more desirable than a continuous rim having but one opening or division; yet I do not wish to confine myself to any particular number of segments.

When the hoop or rimis formed, a thin strip of metal is bent at right angles to form casings B B around both edges of the rim. These casings do not cover the entire surface ofthe rimthat is to say, their edges do not meet-but a space of one or two inches is left between them on the face side of the pulley, and leaving a portion of the wooden rim exposed. By this m eans the rim, and particularly the edges there of, are strengthened and protected from moisture and water `when working in a damp location.

In order to confine the meeting ends of the rim together firmly, I employ curved plates C, curved so as to conform to the curva-ture of the segment or circle of the rim, and they are provided with a tapped boss, D.` These holdingplates are also pierced with holes, in which The object of my invention is to provide a.

copper rivets F are placed, passing through the rim, in which position they are headed down smoothly on the outer face of the rim,

of these arms, which, by turning, loosens or tightens up the rim of the wheel or pulley. ByV

this means it will be seen that the rim of the wheel can alwaysbe kept in a true circle and tightly bracedA from within at all necessarypoints, as these spider-arms canbe placed at suitable intervals around the entire rim.

Having thus described' my invention, what I claim, and desire to secure by Letters Patent, 1s

l. A pulley-rim constructed of one or more strips of wood bent to a circle and held together at the meeting ends by metal plates and copper rivets, and provided with a suitable number of spider-arms extending from the hub to the inner face of the rim, substantially in the manner as herein set forth and specified.

2. In combination with a pulley provided with a wooden rim, the casings composed `of thin strips of metal B, bentat right angles to inclose the edges and a portion of the body of the rim, substantially as Set forth, for the purpose specified.` Y

3. In a pulley the rim of which is composed of one or more strips of wood bent in segments,

having only two meeting ends, the adjustable spider-arms provided with screw-threads, and Y adapted to tighten or loosen the pressure upon the rim and strengthen and support the parts thereof, substantially in the manner as herein set forth and Specied. y

In testimony that I claim the foregoing I have hereunto set my handand seal.`

y AUGUSTUS wALTon. Y [n s] Vtnesses:

C. W. M. SMITH, CEAS. E. KELLY.

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