US468713A

US468713A - Stove-jack

Info

Publication number: US468713A
Authority: US
Publication date: 1892-02-09
Anticipated expiration: 1909-02-09

Description

(No Model.)

1). B. WHITEHILL.

STOVE JACK.

Patented Feb. 9. 1892.

UNTTED STATES PATENT @rricn,

DAVID BROIVN \VHITEHILL, OF NORTH CLARENDON, PENNSYLVANIA.

STOVE-JACK.

SPECIFICATION forming part of Letters Patent No. 468,713, dated February 9, 1892.

Application filed May 29, 1891. Serial No. 394,554, (No model.)

To all whom it may concern.-

Be it known that 1, DAVID B. WHITEHILL, a citizen of the United States, residing at North Clarendon, in the county of Warren and State of Pennsylvania, have invented certain new and useful Improvements in Stove- Jacks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in jacks or devices for lifting stoves and other objects; and the objects of my invention are, first, to provide a portable hoisting device adapted to be quickly and readily placed over a stove. and to be connected thereto to raise the stove above the floor for the purpose of placing an oil-cloth thereunder or for cleaning and repair purposes; secondly, to provide means whereby the stove can be easily lifted with entire safety, and, finally, to simplify the device and render it capable-of compact folding for storage and transportation.

\Vith these ends in view my invention con sists, primarily, in the combination, with a trestle or support, of a lever movably mounted on the horizontal bar or beam of said support, a series of depending grapples adapted to be connected to the objec't'to be lifted, and connections between the lever and the grapples.

My invention further consists in the combination and construction of parts, as will be hereinafter more fully described and claimed.

To enableothers to understand my invention I have illustrated the same in the accompanying drawings, in which Figure I is a perspective view of a lifting device embodying my invention. Fig. II is a vertical transverse section on the plane indicated by the dotted line a: wot Fig. I. Fig. III is a detail view of the joint between the horizontal bar or beam -and the legs of the trestle or support.

Like letters and numerals of reference denote'corresponding parts in the several figures of the drawings.

In said drawings, the letter A designates the trestle or support, on which is mounted the lever and the devices associated therewith for raising the stove or other object.

This trestle is made so as to be compactly folded together when the lifting device is not in use, and it consists, essentially, of a horizontal beam or bar 13 and the two pairs of legs 0 O and D D, said legs being connected to the bar or beam near the ends thereof by joints E E, respectively. The legs of each pair are arranged in divergent positions and they are connected together by a transverse bar G, one end of which is pivoted to one of the legs of the pair and the free end of which bar is notched at g and adapted to fit or take over a fixed pin or stud g on the other leg of the pair. The upper. ends of the legs are fitted in tapered or inclined recesses f f, formed in opposite faces of the bar or beam, and through said bar and the upper ends of the legs is passed the transverse pin f having in each end the keys When the legs of each pairare spread apart and the bar or brace adjusted to hold them in their divergent positions, the upper ends'of said legs are forced tightly into the inclined or tapered recesses ff, whereby the trestle is held in a firm or rigid position. At the same time the braces can be detached from the legs of the two pairs, folded parallel with the leg to which they are pivoted, and the legs of each pair folded inward toward each other, thus adjusting the upper ends of the legs out of the recesses and enabling the legs to be folded horizontally against the bar or beam 13.

I is the hand lever, which is movably mounted on the horizontal bar or beam of the trestle or support A, and jj' are the series of grapples, which are adapted to be connected to the stove and which are raised or lifted by the lever through intermediate connections between the lever and said grapples. The lever may be suitably mounted on the bar or beam, so as to shift or change its position thereon; but for simplicity of construction I prefer to bifurcate or fork the lever and employ a series of pins which fit in apertures in the bar or beam and which serve as the bearings or fulcra of the lever as it is operated. The lever is bifurcated at its lower end, as at t', and the bar fits snugly in the slot or space thereby provided, and the prongs Q1 of said lever are long enough tobear against the pins K K, which are arranged one below the other. The lower pin K is adapted to be fittedin either of a series of low apertures 76, while the upper pin K is fitted in eitherof a series of high apertures k, said apertures being formed in two parallel series of the bar or beam 13 of the trestle. The grapples consist of cords or ropes j, provided at their free ends with hooks j and connected or fastened to a sliding ring J.

I. is a guide, which is suitably fastened in a r1gid firm manner to the bar or beam B, preferably at or near the middle thereof, and over this guide-bar passes a cord or rope lWI.

This cord is fitted in a notch 4, formedin the upper edge of the bar B, or a staple may be driven in such upper edge of the bar or any other suitable means employed to fasten said cord to the bar or beam on one side of the guide bar or pin L thereof, and the ends of said cord are connected to the free end of the lever I, which is arranged on the bar or beam on the opposite side of the guidepin L to the point of attachment of the cord to said bar or beam 13. The ends of the guide-pin L are suitably extended beyond the sides of the bar or beam B, so that the cord M can rest thereon, and, if desired, said ends of the guide-pin may be provided with friction rollers, although this is not essential. The sliding ring J is fitted loosely over the cord M, as shown.

In operation, the bifurcated lever is moved or adjusted on the beam close up to the guidepin L to lengthen the cord M and lower the grapples, so that they can be readily connected to the stove or other object to be lifted. After the grapples have been properly connected to the stove one of the pins K is adjusted close to the lower end of the lever and the latter is depressed, so that the pin serves as the bearingor fulcrum thereof, after which the other pin is placed in rear of the lever, the latter again shifted away from the guidepin, and the pins are shifted with each movement of the lever, so that the latter is gradually moved away from the guide-pin and thereby operates to shorten the rope M M and thus raise the stove or object.

It is evident that the pins prevent the lever from being drawn backward under the weight of the load, and thus the device can beoperated with safety. The trestle is rigid and strong when properly adjusted and fastened, and it can be easily and quickly folded together in a compact manner and as readily set up for use over the stove or other object.

Although I have specifically mentioned that the device is to be used for lifting stoves yet I do not confine myself to this particular use or adaptation of the hoisting device, as it is evident that it can be used with advantage in other relations where it is desirable to employ a portable and cheap device for lifting heavy objects; nor do I strictly confine myself to the precise details of form and proportion of parts herein shown and described as an embodiment of my invention, as I am aware that modifications can be made therein Without departing from the spirit of my invention.

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

1. The combination, with a trestle or support, of a lever movably mounted thereon, the cord fastened to said trestle and to the lever, and the grapples having a sliding or loose connection with said cord, substantially as described.

2. The combination, with a trestle or support, of a lever movably mounted on the bar. or beam of the trestle, means for holding the lever in place and operating as the fulcrum thereof, the cord fastened to the trestle and to the lever, and the grapples having the loose or sliding connection with said cord, substantially as described.

3. The combination of a trestle having the perforations and the guide-pin, the lever fitted on said trestle, the cord fastened to said lever and to the trestle, the removable pins fitted in the apertures of the trestle, and the 4. The combination of a trestle having the perforated bar or beam, the fixed guide pin or stud, the bifurcated lever which straddles the bar or beam of the trestle, the removable pins fitted in the apertures in said beam or bar, the cord passing over the guide pin or studs and the bar or beam and having its ends connected to the lever, the sliding ring fitted on said cord, and the grapples attached to said ring. substantially as described.

5. In a lifting device, the trestle having its horizontal bar or beam provided with recesses in its faces and the legs fitted in said recesses and connected by the transverse pins and the braces, combined with a lever movably fitted on said beam or bar, the cord attached to said lever and the bar, and the grapples connected to the cord, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

D. B. VVHITEHILL.

WVitnesses:

HENRY E. COOPER, H. I. BERNHARD.

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