US471468A - Trix of said benjamin f - Google Patents

Description

(No Model.)

B. I. DAVIS, Deod.

M. L; DAVIS, Administram'x. HOISTING APPARATUS.

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UNITED STATES PATENT OFFICE.

BENJAMIN F. DAVIS, OF OORSIOANA, TEXAS, ASSIGNOR OF ONE-HALF TO RALPH BEATON, OF SAME PLACE; MATILDA L. DAVIS ADMINISTRA- TRIX OF SAID BENJAMIN F. DAVIS, DECEASED.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 471,468, dated March 22, 1892.

Original application filed March 14, 1891, Serial No. 385,071- ]livided and this application filed August 6, 1891. Serial No. 401,890. (No model.)

To all whom it may concern.-

Be it known that I, BENJAMIN F. DAVIS, a citizen of the United States, residing at Corsicana, in the county of Navarro and State of Texas, have invented new and useful Im provements in Hoisting Apparatus, of which the following is a specification.

This invention relates to hoisting apparatus, and has for its object to provide novel,simple, and efficient means for hoisting objects of any character, and after raising them to a sufficient height to avoid any side obstruction to transfer them to a desired position out of the line of the approximately-vertical direction first given to them.

To accomplish this object my invention involves the features of construction and the combination or arrangement of devices hereinafter described and claimed, reference being made to the accompanying drawing, in which the figure is a side elevation ofa hoisting apparatus embodying my invention.

In order to enable those skilled in the art to make and use my invention, I will now describe the preferred construction and arran gement, referring to the drawings, wherein- The numeral 1 indicates a vertical frame or trestle arranged in a suitable position upona wharf, levee, bluff, or other elevated platform or structure where a cargo is to be discharged or delivered. The trestle 1 serves as a support fora beam 3, the forward end of which overhangs the wharf or other elevated platform on which the trestle is situated. 'The beam may or may not be trussed, and is of such length that its rear end terminates some distance from the brick of the wharf or other elevated platform. Therear portion of the beam is supported on a frame or trestle 4, preferably of less height, than the forward trestle, so that the beam will be inclined. The forward or overhanging end of the beam is provided with a sheave or grooved pulley 6, and upon the beam is mounted a windingdrum 7, to which is attached one end of a hoisting-cable 8, passing from the drum to and over the sheave or grooved pulley 6, from which latter the hoisting-cable hangs in the form of a loop, one side of which passes upwardly and engages a suspended sheave or equivalent'device 21, carried by one extremity of a cable 20,which at its opposite end portion is attached to a secondary winding-drum 9, journaled in suitablebearings upon the beam 3. The pendent looped portion of the hoisting-cable supports a traveling sheave 10, having a hook 11 for engagingabale of goods or a bucket or other receptacle for facilitating the loading and unloading of freight. As

the hoisting-cable is wound up by the winding-drum 7 the sheave 10 and its cargo are elevated to the position indicated by full lines in the drawing. If the winding-drum 9 be now rotated in the proper direction to permit the sheave 21 to descend, the rear portion of the hoisting-cable 8 is by the weight of the cargo caused to assume an inclined position, so that the traveling sheave 10 moves down the incline, and thus the cargo is deposited upon the wharf or other elevated platform. After the cargo has been discharged the cable 20 is wound on the drum 9 for the purpose of drawing upwardly and securing the rear portion of the hoisting-cable 8, thus returning the traveling sheave 10 to its former position, so that by slackening the forward portion of the hoisting-cable the traveling sheave 10 will descend and can again be hoisted without coming in contact with the vertical face of the wharf or other elevated structure or plat form. The winding-drum 7 should be in line with the sheave 6, so that the draft will bein a direct line therewith. The hoisting-cable is preferably passed over the sheave 6, and after being formed into the pendent loop its extremity is secured in any suitable manner to a fixed object, which may be the beam 3.

By the construction and arrangement of devices described an effective and easily-operated device is provided forloading and unloading freight in such manner that the load or cargo can be easily raised and then moved off in the desired direction without contact with the vertical Wall or face of the wharf or other elevated structure.

I do not wish to be understood as confining myself to the particular supporting-frame described and shown, for obviously it can be dif- 2 ames ferently constructed and arranged without altering the character of my invention.

It will be observed that according to my invention I employ two cables and two sheaves in such manner that one cable and one sheave operate to elevate the weight or object in an approximately-vertical plane, so as to avoid contact with any side obstruction, while the secondary cable can subsequently be slackened suiliciently to permit the traveling sheave of the hoisting-cable to run off in a lateral direction and carry with it the sheave of the slaekened secondary cable, for the purpose of transferring the object or weight to a desired position out of the line of the approximately-vertical direction first given to it.

Having thus described my invention, what I claim is--- 1. In ahoisting and transferring apparatus, the combination, with suitable supports, and a hoisting-cable having a depending looped portion provided with a traveling sheave, of a secondary cable loosely connected with the hoisting-cable to support it at one side of the depending looped portion, while the latter is taken up to elevate the travelin sheave, an d means for letting out the secondary cable after the traveling sheave is raised for inclining the hoisting-cable, and causing the traveling sheave to move laterally for transferring the load which has been ho'sted, substantially as described.

2. In a hoisting apparatus, the combination of a beam supported at an elevation above the weight to be lifted and transferred, a sheave mounted on the highest end of said beam, a hoisting-cable passed over said sheave, a traveling sheave mounted in a loop ordepression of said cable, a secondary cable supported at one end and having a device loosely engaging the hoistingcable to support the same at the desired elevation, and means for drawing up and releasing the secondary cable, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

"BENJAMIN F. DAVIS.

Witnesses:

R0131. O. COULSON, A. C. MoMrLLaN.

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