US366792A

US366792A - Lifting-jack

Info

Publication number: US366792A
Authority: US
Publication date: 1887-07-19
Anticipated expiration: 1904-07-19

Description

(No Model.)

F. QUINT.

' LIPTING JACK.

No. 366,792. Patented'July 19,1887.

UNITED STATES PATENT OFFICE,

FREDERICK QUINT, 0E WILLOWs, CALIFORNIA.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 366,792, dated July 19, 1887.

Application filed April 7, 1887.

To all whom it may concern.-

Be it known that 1, FREDERIcK QUINT, of \Villows, Colusa county, State of California, have invented an Improvement in Lifting Jacks; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to that class of liftingjacks in which the power of the pivoted lever is transmitted through links to the verticallymovable lifting'head; and my invention consists in the combination and arrangement of the guidestandard, the pivoted lever, the lifting-bars, and the adjustable and verticallymovable liftinghead, as I shall hereinafter fully describe. 7

The object of my invention is to provide a simple and powerful lifting-jack adapted, by reason of its arrangement oflever, to be placed under a weight without interference from said lever, and by reason. of its readily-adjustable lifting-head to be fitted for dilferent heights.

Referring to the accompanying drawings for a more complete explanation of my invention, Figurelisa perspective view ofmylifting-jack. Fig.2 is a perspective detail of the lower portion. Fig. 3 isa section through the liftinghead E.

A is the guide-standard having a stable base, a.

B is a bent or angled lever having one end formed with or connected to a handle, Z), of proper shape and of a length which carries it but little above the top of the standard when in a vertical position. The required length of the handle is gained by pivoting the lever B to the standard near its base, said pivot being through the shorter arm of the lever, as shown at C. The lever B is a slotted or forked one, passing on each side of the standard.

D D are parallel lifting-bars,which pass up on each side of the standard, their lower ends being pivoted at d to the projecting ends of the lever B,

E is the lifting-head,having a stock, 6, with a hole through it, the end walls of the hole being beveled, making it an inclined aperture so as to cause the head to cramp on the bars when fitted upon them. The stock e has a short handle, e, extending backwardly from Serial No. 234,082.

(No model.)

the bars, to regulate approximately the proper height. The handle I) is elevated to lie close to the standard, whereby the inner end of the lever B is depressed, the bars drawn down, and the lifting-head brought low enough to pass under the weight. \Vhen in proper position, the handle is forced down, thereby elevating the inner end of the lever and raising the bars,which carry the head up with them, thus lifting the weight,which of course cramps the head firmly on the bars. In this movement the parts are all guided vertically by the standard, to which they are held by the apertured stock of the lifting-head,which fits over both bars and standard.

The handle I), as before stated, has sufficient length to give the necessary power, and yet by pivoting its lever so low down the top of the handle is but little higher than the stand ard, and it will not therefore be in the way when the jack is placed under the weightpreparatory to lifting it. This construction also gives facility in handling the jaek,as the hand may grasp the tops of the standard, bars, and handle all at once.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination, in a liftingjack, of a guide-standard, a bent lever having a handle and being slotted and pivoted on the standard, lifting-bars passing up on each side of the standard and pivoted at their lower ends to the end of the bent lever, and a lifting-head fitted over the standard and liftingbars and carried by the lifting-bars, substantially as herein described.

2, The combination, in a lifting-jack, of a gnidestandard, a bent lever having a haning on said bars under the weight, substandle and slotted and pivoted on the standard tially as herein described. 7

near its lower end, lifting-barspassing up on In witness whereof L have hereunto set my each side of the standard and pivoted at their hand.

lower ends to the end of the bentlever, and an FREDERICK QUINT. adj nstable lifting-head having a stock with an Witnesses: inclined orbeveled walled aperture for fitting WM. F. BOOTH,

7 over the standard and lifting-bars and cramp- S. H. NOURSE.