US184820A

US184820A - Improvement in hoisting-machines

Info

Publication number: US184820A
Authority: US
Publication date: 1876-11-28
Anticipated expiration: 1893-11-28

Description

J. I. BENHAM &'L. LEEDS.

Husum-MACHINES. No.'184,820. .Patented Nov. 28,1876.

im' MUNI ATTORNYS UETTEE STATES PATENT @EET JAMES I. BENHAM AND LODOWICK LEEDS, OF NEW LONDON, CONN.

IMPROVEMENT IN HOISTING-MACHINES.

Specification forming part of Letters Patent No. 184,820, dated November 28, 1876; application led August 29, 1876.

- construction of a hoisting` apparatus, as llereinafter more fully set forth.

In the accompanying drawings, which form a part of this specification, Figure 1 repre-' sents a side elevation, and Fig. 2 an end view, of the machine.

A represents a metallic stirrup or frame, having a contracted portion, a, at the top for attaching a hook or other device to suspend the machine to a ceiling, beam, or other place. Between the lower ends ot the bars of the frame is journaled a shaft, y, and upon this shaft is placed a wheel, E E', having a series of hooked notches, d d, on its periphery and a series ot smaller and similar notches, d d', on one face, near the periphery. G represents a pulley, also mounted on the shaft y and rotated with the wheel. This pulley is provided with suitable notches or devices to prevent the chain H, which passes around the same, from slipping. B represents a metallic head, which is pivoted or journaled, at av, between the bars of the frame A, `just below the contracted portion a. Each end of this head is socketed, as seen at C C, Fig. l, and into said sockets are inserted operating handles or levers b b. These levers are easily detachable from the head, for replacing them in case of breakage, or for any purpose. Connected to the head are two pivoted bails or hooks, C D, one on each side of the pivot X, and both extending down to and on the' same side of the wheel E, for engaging in the notches of the same. On a shaft, between the point av and the top ofthe wheel E, are pivoted two gravitating pawls, ff. These pawls drop into the notches d d', respectively, of the wheel on the side opposite to the bails C D.

The operation ot' the machine is simple.

lThe frame being suspended, and the chain H being passed around the pulley G, the chain is attached to anything to be hoisted. rIhe levers b b are raised and lowered alternately, so that the bails C D will catch, one after the other, in the notches d of the wheel, while the pa-wls f f drop, one after the other, in the notches del' in the sameon the other side. This action will cause the wheel to have a continuous rotating motion, and thus raise the chain by the revolving of the pulley G with the wheel. The two pawls will prevent any backward movement, inasmuch as one is always in a notch of the wheel.

Having thus fully described our invention, what we claim, and desire to secure by Letters Patent, is-

The combination of the frame A, the wheel E, with hooked notches d, the wheel E', of smaller diameter, on the face ot the wheel E, and having hooked notches d formed of the same shape and extending in circular form the same direction as the notches d, the gravitating pawls ffpivoted to the stirrup A, the pivoted head B, having handles b b, and the bails or hooks C D pivoted to the head B, all oonstructed substantially as and for the purposes herein set forth.

In testimony that we claim the foregoing we have hereunto set our hands this 22d day of August, 1876.

JAMES 1. BEN HAM. LODOWICK LEEDS. Witnesses:

BENJ. M. CARROLL, HENRY PHILLIPS.