US349520A - Edwabd samuel - Google Patents

Description

(No Model.)

E. SAMUEL.

CHAIN GUIDE FOR HOISTSI.

C/ /P,a,te ted Sept. 21, 1886.

M g Mzm ,9. 0m

N. PETERS, Phowumo n her Waihinglun, 0.0.

UNITED STATES PATENT OFFICE.

EDW RD sAMUEL, 0E PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 WILLIAM WHARTON, JR., & 00., (LIMITED) OF sAME PLACE.

CHAIN-GUIDE FORHOIISTS.

SPECIFICATIQN forming part of Letters Patent No. 349,520, dated September 21 1886.

Application filed Juno2B,1886. Serial No. 206,478. (No model.)

.To all whom it may concern.-

Be it known that I, EDWARD SAMUEL, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Chain-Guides for Hoists, of which the following is a specificatiom My invention relates to improvements in chain-guides for hoists, the object/of my invention being to prevent the ehai n from jumping off the wheel, as fully described hereinafter.

In the accompanying drawings, Figure 1 is a side view of a hoist with my improvement attached. Fig. 2 is a diagram illustrating the action of the chain when using the chaingnides without my improvement, and Fig. 3 is a diagram illustrating a hoist with my improved chain-guide.

A is the frame or yoke of the hoist, having a suspendi ng-hook, a, and Bis the shaft or spindle on which revolves the driving or chain wheel D.

E is the driving chain, which passes around the wheel D. This chain passes through guideeyes ff in arms F F, which are pivoted to the spindle B. The arm F is supplied with two stops, e e, the stop 0 limitingits downward movement, and the stop 6 limiting its upward movement, as shown by dotted lines in Fig. 1, by coming into contact with a pin,

a, on the yoke A. Similar stops are provided on the arm F.

All the above-described parts are shown and described in the patent to White, No. 291,251, dated January 1, 1884. A difficulty is experienced in the use of these hoists,

however, in that the operator in hauling is apt to use short quick jerks, and thereby cause the upgoing portion of the chain to vibrate, and the arm F to be thrown upward on its pivot so quickly as to throw the chain off the wheel, as shown in Fig. 2,. and stop the hoist.

To overcome this difficulty, I connect the two arms F F by a spring, G, as shown in Figs. 1 and 3, the spring being fastened to lugs g g on each arm F F. This spring is not stiff enough to resist pulling of the chain on an angle, as exigencies may require, but will be sufficient to practically prevent the upward jerking-of the arm F and the jumping of the chain from the wheel.

The spring G may be made in two parts, and

necting the chain-guides, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the p rescnee of two subscribing witnesses.

' EDWD'. SAMUEL. Vitnesses:

HENRY D. WHELDo,

HARRY SMITH.

Images