US1056346A - Lifting-jack. - Google Patents

Description

A. H. LOWDEN.

LIFTING JACK.

APPLICATION FILED SEPT. 11, 1912.

1,056,346. Patented Mar. 18, 1913.

W/TNESSES: INVENTOR I ATTORNEY unnunmm PLANOGRAPH COUWASHXNGTON. 0.1:

UNITED STATES PATENT OFFICE,

AMOS HENRY LOWDEN, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO EMMA C.

LOWDEN, OF BRIDGEPORT, CONNECTICUT.

LIFTINGr-JACK.

Specification ofLetters Patent.

Patented Mar. 18, 1913.

To all whom it may concern Be it known that I, Amos HENRY Low- DEN, a citizen of the United States, residing at Bridgeport, county of Fair-field, State of Connecticut, have invented an Improvement in Lifting-Jacks, of which the following is a specification.

This invention has for its object to provide a simple and inexpensive ack adapted for general use and especially adapted for use by carpet layers in lifting stoves, refrigerators and heavy articles of furniture and which will permit a rug, carpet or linoleum to be laid under a stove or heavy article of furniture without appreciable loss of time and without any manual labor in lifting the article.

\Vith these and other objects in view I have devised the novel jack which I will now describe, referring to the accompanying drawing forming a part of this specification and using reference characters to indicate the several parts.

Figure 1 is a side elevation of my novel jack as in use; Fig. 2 an end view corresponding therewith; Fig. 3 a perspective view of one of the folding supports detached, the extended position being inclicated by dotted lines, and Fig. 4 is a perspective view illustrating the use of my novel jack in lifting a stove.

The jack as a whole comprises two screws, indicated by 10, which are stepped in and supported by bases 11, cross pieces 12 with which the screws have threaded engagement and supports 13 which carry the weight and are themselves carried by the cross pieces. These supports are preferably made to fold for convenience in transportation, as clearly shown in Fig. 3.

The bases may be made of any suitable material, as metal or wood and are each provided with a socket 14 which receives the unthreaded tip 15 of one of the screws. The socket is made deep enough and the tip long enough to retain the screw in an upright position and enable it to carry a cross piece without danger of the parts toppling over. The upper end of each screw is provided with a head 16 for convenience in operation. This head may be of any preferred construction to suit the convenience of the oprespective ends of the supports rest.

erator or the special requirements of use, as a crank, but preferably the head is squared, as shown in the drawing, to receive a socket wrench or other tool whereby it is rotated. Each cross piece has at its mid-length a threaded vertical hole through which one of the screws pass. The ends of the cross pieces are provided with depressions 17, preferably U-shaped as shown, in which the The supports preferably comprise two parts hinged together for convenience in packing and transportation. The parts are indicated specifically by 13 and 13 The hinge, which may be a simple pivot, is placed near one end of part 13 and at sufficient distance from one end of part 13 to provide for an overhanging rest 18 which receives part 13 in the extended position, as indicated by dotted lines in Fig. 3. This rest is placed at a sufficient distance from the hinge to give the support, when the parts are extended, ample strength to carry any possible weight the jack may be called upon to lift.

The operation will be readily understood from the drawing. The bases are placed in position on opposite sides of the stove or other article to be lifted. The cross pieces are run down nearly to the lower ends of the screws and the tips are placed in the sockets. The supports are then passed under the stove or other article to be lifted and the ends of the supports are placed in the depressions, as clearly shown in Figs. 2 and 1. The stove or other article is then lifted by rotating the screws whereby the cross pieces are raised and with them the supports and the weight carried thereby. The supports are made long enough to permit the bases to be placed a suflicient distance apart to permit a strip of linoleum to be passed between the bases when the stove or other article is lifted. In practice the supports are preferably made seven feet long, more or less, which will permit a strip of linoleum six feet wide to be passed readily between the bases. In laying rugs and made up carpets, the conditions frequently require that one or possibly both sides of the rug or carpet be rolled or folded before being passed between the bases and under the stove or article of furniture while the latter is raised,

After the rug or carpet is in place the stove or article of furniture is lowered to place by turning the screws backward, the jack is removed and the rug or carpet may then be spread in place.

Having thus described my invent-ion I claim:

1. A lifting jack comprising bases having sockets, screws having tips engaging the sockets whereby the screws are retained upright, cross pieces engaging the screws and provided with depressions and supports engaging the depressions by which the weight is carried.

A lifting jack comprising bases having sockets, screws having tips engaging the sockets, for the purpose set forth, cross pieces engaging screws and provided with depressions and two-part hinged supports adapted to engage the depressions when extended.

3. A lifting jack comprising bases having sockets, screws having tips engaging the sockets whereby the screws are retained upright, cross pieces engaging the screws and provided with depressions and twopart hinged supports adapted to engage the depressions one part of each support being provided with an overhanging rest which receives the other part in the extended position.

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

AMOS HENRY LOWDEN.

lVitnesses A. M. lVoosrnn, S. A'rIIERToN.

Copies of this patent may be obtained for five cents each, by addressing the flonimissioner of Patents, W'ashington, D. E3.

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