US532349A

US532349A - Automatic gripping cable-pulley

Info

Publication number: US532349A
Authority: US
Publication date: 1895-01-08
Anticipated expiration: 1912-01-08

Description

(No Model.) A' l l J. H. WATTS. AUTOMATIC GRIPPING CABLE PULLEY. .NCL 532,349. V Patented Jan. 8, 1895.

WMM A I WWA wlw/MB1 Wwgiesses.

NITED STATES 'PATENT rricit JOHN H. WATTS, OF AUBURN, NORTH DAKOTA.

AUTOMATIC G RI PlPlfN G` CABLE-PU LLEY.

.SPECIFICATION forming part of Letters jPatent-No. 532,349, dated VJanuary 8, 1895. Application tied nach 26.18924. serial No. 505,058. (No more.)

To aZZ whom t may concern.-

Be it known that I, JOHN H. WATTS, a subject of the Queen of Great Britain and Ireland, who have declared my intention of becoming a citizen of the United States, residing at Aubnrn,in the county of Walsh, in the State of North Dakota: have invented certain new and useful Improvements in Automatic Gripping Cable-Pulleys, of which the following is a specification.

This-invention relates to automatic gripping cable pulleys, and consists in the construction, combination, and arrangement of parts, as hereinafter shown and described, and specifically pointed out in the claims.'

In the drawings, Figure l is a sectional side elevation, and Fig. 2 is a plain view. Fig. 3 is a detached perspective view, of one of the grooved conical gripping jaw guide drums. Fig. 4 is a detached perspective View, of one of the gripping jaw guide collars. Fig. 5 is a detached perspective view, of the gripping jaw actuating ring. Fig. 6 is a bottom plan View showing the manner of arranging the stop ratchet.

The apparatus consists of a framework A in which a shaft B is supported by suitable bearings A2 and to one end of which the gearing for transmitting the power will be connected.

Keyed or otherwise connected to the shaft B are two drums B2 Ba formed slightly conical on their outer surfaces, as shown, and with a series of grooves et formed in their outer surfaces'and runninglengthwise of the drums.

Between the adjacent ends of the drums B2 B4 are two collars B4 and B5, and between these two collars is a ring B6 somewhat larger than the shaft so as to be free to move loosely around the shaft between the drums.v Surrounding the drums B2 B3 area series of gripping jaws each formed in two portions piv- `oted together at band with outwardly curving jaws D D2 and arms Da D4 at nearly right angles thereto and lying within the grooves a within the drums, as shown. Surrounding each of the drums B2 B3 are rings or guide collars D5 D6 having arches or housings e through which the arms D8 D4 project, the arms having lugs e2 on their outer ends to prevent them from being drawn inward through the housings, these collars D5 D6 thus serving as guides to the arms D3 D4, to control their action.

The inner surfaces of the hubs of the gripping jaws rest in contact with the outer surface of the loose ring B, as shown.

The relative positions and formation of the jaws D D2 and the arms D2 D2, and the drums B2 B3 are such, that when the cable d is threaded around between the curved jaws,

ward movement of the ring B6 on the opposite side, reverses the movement of the opposite jaws and causes them to open and release their grip upon the cable, the lugs e2 catching beneath the housings e on the rings D5 D6 and holding the arms D8 D4inward in their proper proximity to the drums, as shown in Fig. 1. By this simple arrangement, as the cable passes around between the jaws D D2, the jaws automatically grip it firmly on the outer side of the pulley and release it on the inner side, so that a positive tenacious pull is at all times had upon the shaft B to revolve it. rlhere is no opportunity for slipping,and the grip is positive and sure, no matter how heavy a load the cable may be subjected to.

To render the action more sure, I provide the outer surface of each of the jaws D D2.

.supporting'the guide wheels g2 g3 will be made adjustable to compensate for wear, or change IOO of the size of the cable; The rings D5 D6 will be adjustable upon the drums B2 B3 to allow for larger or smaller cables.

Having thus described my invention, what I claim as new is- 1. In a rope or cable system for operating machinery, a shaft, grooved drums fast upon said shaft, pivoted jaws having arms fitting into said grooves, and a loose collar surrounding said shaft between said drums and adapted to aetuate said jaws, substantially asand for the purpose set forth.

2. In a rope or cable system for operating machinery, a shaft, grooved drums fast upon witnesses.

JOI-IN H. WATTS. Witnesses:

A. L. MILLER, O. M. CORWIN.