US807878A - Crane. - Google Patents

Description

PATBNTED DB0. I 1905. G. E. SUPER. 9

CRANE.

APPLICATION FILED sEPT.16. 1905.

w/TNESSES,

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GEORGE ELLIS SOPER, OF KANKAKEE, ILLINOIS.

CRANE.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed September 16, 1905. Serial No. 278,712.

T0 all whom t may concern/ Be it known that I, GEORGE ELLIS SoPER, a citizen of the United States, and a resident of Kankakee, in the county of Kankakee and State of Illinois, have invented a new and Improved Orane, of which the following is a full, clear, and exact description.

This invention relates to small cranes or hoists such as used in machine-shops, foundries, and similar places for raising and moving heavy machine parts.

The object of the invention is to produce a crane of this class which is simple in construction, composed of few parts, and which will have a desirable resiliency when supporting its load.

More specifically, the object of the invention is to construct the crane so that the mast thereof constitutes a brace and reinforcement for the base or truck of the crane.

The invention consists in the construction and combination of parts, which will be more fully described hereinafter and definitely set forth in the claims.

Reference is to be had to the accompanying drawings,kforming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of a crane constructed in accordance with my invention. Fig. 2 is a front elevation of the crane; and Fig. 3 is a plan, a portion of the handle or draw-rod of the crane being represented as broken away.

Referring more particularly to the parts, 1 represents the mast of the crane, the same consisting, preferably, of a pair of oppositelydisposed frame members which converge toward their upper extremities, at which point they are bent forwardly, so as to present parallel horizontal arms 3, as shown. These horizontal arms 3 constitute the boom 4 of the crane. At their lower extremities the frame members 2 are bent, as indicated at 5, so as to present forwardly-diverging horizontal feet or foot extensions 6. Preferably to the inner faces of these foot extensions 6 there is rigidly attached the diverging legs 7 of a yoke 8. At its rear extremity the curve or bow of this yoke is offset rearwardly, so as to form a rudimentary socket 9 for the pintle of a wheelfork 10, the said fork carrying lthe wheel or roller 11 as indicated. At the forward extremities of the legs 7 rigid wheel-forks 12 are attached, which carry wheels 13, similar to the wheel 1l just described. At suitable points above the bends 5 of the frame members 2 braces 14 are provided, which `connect with the rear portions of the yoke 8. In this way the yoke 8, together with the foot extensions 6 of the mast, constitutes a very rigid base or truck for the crane.

At a suitable point on the frame members 2, preferably at the rear side thereof, a drum 15 is attached, the same comprising aratchetwheel 16, with which a pawl 17 cooperates to maintain a load in an elevated position. Said drum is operated by means of a suitable crank 18. A hoisting-cable 19 passes upwardly from the drum 15 and passes over a guide-roller or sheave 20, which is attached on the rear side of the curve or bend 21 of the mast just below the point where the boom 4 is formed. From the sheave 2O the cable passes upwardly over guide-pulleys 22 and y23, from which a suitable block or tackle 24 depends. 'lhe block 24 is provided with a suitable hook 25, which facilitates the attachment of the load to be raised.

In order to facilitate the moving of the crane from place to place, the rear fork 10 is provided with a suitable handle or tongue 26, which'constitutes a draw-bar for pushing' or pulling the crane about the shop.

With a crane constructed as described it should be observed that the bends or curves 5, which connect the masts with the base, afford a desirable resiliency, so that in case the crane should be overloaded such an overload will notbe likely to cause an accident, but will simply result in producing a gradual failure or collapse of the material at the bends 5. On this account, in case an overload to the crane has occurred, the crane may be quickly repaired by rebending the parts to their original form. In this way all inconveniences such as the snapping of rivets or breaking of parts are avoided. At the same time attention is called to the fact that the foot extensions 6 of the mast constitute reinforcements for the legs 7 of the yoke 8, so that the parts at this point constitute an efficient base or truck for the crane.

Vhile I have represented the frame members 2 as formed of the structural shape known as angle-iron, these parts may be constructed of any of the steel structural shapes used in building, such as channels or I-beams.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A crane having a mast bent at its lower extremity to present substantially horizontal IOO IIO

wardly-diverging foot extensions, a yoke rigidly attached to said foot extensions and presenting a bow at the rear thereof, and braces connecting said bow with said frame members K adjacent to said foot extensions.

In testimony whereoil I have signed my name to this specification in the presence of two subscribing witnesses.

^ GEORGE ELLIS SOPER. Witnesses:

FRANK R. BEEBE, HIRAM A. HITTEMORE.

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