US663932A - Lifting-jack. - Google Patents

Description

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Nrrnn STATES PATENT JOHN THOMAS SANDERS, OF ANDREVS, TEXAS.

LIFTING-JACK.

SPECIFICATION forming part of Letters Patent No. 663,932, dated December 18, 1900.

Application met caoba 4, 1900. serial No. 32,030. (No model.)

To ctZZ whom t may oon/cern,.-

Be it known that I, JOHN. THOMAS SAN- DERS, a citizen of the UnitedStates, residing at Andrews, in the county of Wood and State of Texas, have invented a new and useful Lifting-J ack, of which the following is a specication.

The invention relates to improvements in lifting-jacks.

The object of the present invention is to improve the construction of lifting-jacks and to provide a simple, inexpensive, and efficient device adapted to be readily applied to that class of lifting-jacks having a vertically-movable screw and capable of enabling the jack to be readily connected with an object at the base of it, whereby the range of the liftingjack will be materially increased.

The invention consists in the construction and novel combination and' arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure l is a perspective view of a lifting-jack constructed in accord-` ance with this invention. sectional View of the same.

Like numerals of reference designate corresponding parts in both igures of the drawings.

l designates a horizontal bar arranged at the top of the vertically-movable screw 2 of a jack 3, provided at the top of the screw with the usual head 4, having apertures for the reception of a bar or lever whereby the screw is rotated for operating the jack. The horizontal bar l, which rests upon the top of the head, is provided with a central aperture 5, receiving a vertical journal or pivot 6, formed integral with the head of the screw and provided with a flange 7. The flange 7, which is annular, extends horizontally from the upper end of the journal or pivot 6 and projects over the upper face of the horizontal bar to retain the latter in position. The horizontal bar, which is designed to be constructed of steel or other suitable material, projects from opposite sides of the jack and is provided at its ends with vertical perforations for the Shanks of eyebolts S, which connect hooks or grapples 9 with the ends of the bar 1. The eyebolts, which are adapted to Fig. 2V is a vertical turn freelyin the openings at the ends of the horizontal supporting-bar, may be swiveled to the same in any suitable manner; but in the accompanying drawings they areshown threaded and provided with nuts l0, whereby the hooks may be readily detached from the supporting-bar when desired. The hooks are provided at the upper ends of the sh anks with openings ll and are linked into the eyes of the eyebolts, and the flexible connection between the .eyebolt and the hook and the swivel connection between the latterand the supporting-bar enable the hook to be readily arranged in any desired position to facilitate its engagement with the object to be lifted.

The liftingjack, which possesses great strength and durability, is adapted for a great variety of purposes, as will be readily apparent, and it greatly increases the range and usefulness of an ordinary jack, as it will enable an object to be lifted from the ground by means of the hooks and then operated on by-the jack proper. The object may be raised by engaging the hooks with it until it is at an elevation which will admit of the placing of the'jack beneath it. The object is held in this position until it is suitably propped or supported, after which the hooks are removed from their engaging positions and the screw is'positioned beneath the object. The jack may then be operated to lift the object to any desired height within its capacity.

It will be seen that the attachment is eX- ceedingly simple and inexpensive in construction, that it possesses great strength and durability, and that it may be readily applied to the screw of an ordinary jack. It wllalso be apparentthat the connections between the hooks and the ends of the supporting-bar admit of the hooks being reversed and arranged in any desired position and that as the weight is received at points at opposite sides of the jack the latter will not upset.

What I claim isl. The combination with a jack having a screw provided at the top with a pivot, of a horizontal bar supported on the screw and provided witha central opening receiving the pivot, whereby the bar is journaled on the screw and is adapted to swing freely around the same, said bar being provided at its ends with apertures, the eyes provided with Shanks extending through the apertures at the ends of the bar and sWiveled to the latter, and the opposite hooks provided with openings and linked into the eyes, substantially as described.

2. The combination with a jack having a screw provided at the top with a pivot, a horizontal bar supported bythe screw and provided with an opening to receive the pivot and having apertures at its ends, the eyes located beneath the horizontal bar and provided With vertical shanks passing through the said apertures and adapted to turn freely therein and provided with threads, the nuts engaging the threaded shanks and arranged at the upper face of the horizontal bar, and the hooks having openings and linked into the said eyes, whereby they are exibly connected Wit-h the horizontal bar, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses.

JOHN THOMAS SANDERS.

Witnesses:

W. S. MCAFEE, THOs. W. BROOK.

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