US824614A - Lifting-jack. - Google Patents

Description

No. 824,614. PATENTED JUNE 26, 1906.

B. R. BEAVER. LIFTING JACK.

APPLICATION FILED PEB.26, 1906.

'iaizfi aver i V/TNESSES: 5 [NVfiNTOR A TT'RN Y5 PATENT OFFICE.

BYRON R. BEAVER, OF ULYSSES, NEBRASKA.

LlFTlNG-JACK.

Specification of Letters Patent.

Patented June 26, 1906.

Application filed February 26, 1906. Serial No. 303,025.

To all whom, it may concern.-

Be it known that I, BYRON R. BEAVER, a citizen of the United States, residing at Ulysses, in the county of Butler and State of Nebraska, have invented a new and useful Lifting-Jack, of which the following is a specification.

This invention relates to lifting-jacks, and has for its object to improve the construction and increase the efficiency of devices of this character.

WVith these and other objects in view, which will appear as the nature of the invention is better understood, the invention consists in certain novel features of construction, as hereinafter fully described and. claimed.

In the accompanying drawings, forming a part of this specification, and in which corresponding parts are denoted by like designating characters, is illustratedthe preferred form of the embodiment of the invention capable of carrying the same into practical operation.

Figure 1 is a front elevation, and Fig. 2 is a side elevation, of the improved device. Fig. 3 shows perspective views of the two parts of one of the clamp members detached. Fig. 4 is a transverse section, enlarged, on the line 4: 4 of Fig. 1.

The improved device comprises a stand ard 10, preferably with a supporting-foot 11, and provided with a uide-plate 12, secured to the upper end by bolts 13 or similar devices, and an eyebolt 14 intermediate the standard and in vertical alinement with the guide-aperture in the member 12. Slidably disposed in the guide members 12 and 14 is a lifting-bar 15, having bearing-head 16 at the upper end and a laterallyextending toe 17 at the lower end. Pivoted near one end to the standard 10 is a lever 18, the pivot of the lever being one of the bolts 13, by which the guide-plate 12 is secured to the standard. Two clamp members engage the rod 15, and as they are duplicates, except that one is right-handed and the other lefthanded, a description of one will sufiice for both. The clamp members therefore each consists of two arms 19 and 20 which for the purpose of this descriptionare referred to as the primary arm and secondary" arm, the primary arm 19 having arecess 21 near one end for bearing over the bar 15 at one side, while the secondary arm 20 is formed with an intermediate recess 22 for hearing over the opposite side of the bar 15 and pivoted at 23 to the primary arm and with a hook 24 at the free end for bearing over the primary arm. The two clamp members are superimposed upon the bar 15 and the primary-arm members thereof connected, respectively, at 27 28 to the lever 18 at opposite sides of its pivot by links 25 26.

By this simple arrangement when the lever 18 is depressed the upper clamp member will be moved upwardly by the link 25 and grip the rod 15 and carry the same upward with it, together with the load beneath which the toe 17 or head 16 may be placed. In the meantime the lower clamp member is released by the downward movement of the link 26 and moves downward by gravity upon the bar 15. When the lever 18 is moved upward,- the action of the clamp memhers is reversed, the lower member gripping the bar and the upper member moving down= ward thereover by gravity, and so on, elevating the bar step by step by the action of the lever. When it is desired to release the bar 15, one or both of the secondary arms 20 is moved upwardly until its hook 24 is free from the arm 19, when the arm 20 may be swung clear from the arm 19 and the bar 15 the pivots 23 being loose enough to permit a slight lateral movement to the arms 20.

The device may be constructed of any desired size and employed for any desired pur pose, but is more particularly'designed for use as a wagon or carriage jack.

Having thus described the invention, what is claimed is In a device of the class described, a vertical standard, a plate secured by spaced transverse bolts to said standard and with a lateral extension having a vertical guideaperture, one of said bolts extended to form a bearing-stud, a guide extending from said standard and having an aperture and spaced from said plate with its aperture in vertical alinement with the guide-aperture in the In testimony that I claim the foregoingas plate, a lifting-bar movable through said my own I have hereto aflixed my signature IO guide-apertures, a lever swinging upon said in the presence of two Witnesses.

loea ing-stud, links spaced apart and syving- BYRON R BEAVER 111g lroin said level at opposite sides ol said stud, and clamping means carried by said Witnesses: links and adapted to alternately engage said JOHN BURKY, bar. GEORGE DOBSON.

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