US1280309A - Lifting-jack. - Google Patents

Description

J. SARDO,

LIFTING JACK.

APPLICATIUN FILED :UNE 18. ma.

Patented Oct. l, 1918.

311mm? fof esterne LIFTIN 11i-Sr' ACK,

reses.

'Specification of Letters Patent..

application med :rune lo. wie. ne. ari-asia To all whom t may concern:

Be it known that I, JACOB SARDO, a citizen of the United States, residing at Johnstown, in the county of Cambria and State of Penn- Sylvania, have invented certain new and useful Improvements in LiftingJacks, of which the following is a specification.

My invention relates to lifting jacks, and is specially designed for use on railroads. It is used to lift cars, engines, and obstructions on the tracks, and is very useful in repair work.

The object is to provide a device of this character which will he simple in construetion, and yet strong and durable, and capable of resisting hard usage.

Another object is to provide a jack with which one person may lift a very heavy load, though adapted to beoperated by two persons, and having a wide range of' lifting movement. l

A further object is to provide a jack of this character which can' he conveniently handled and moved along on the railroad track, as the needs of the service may require, without having to be bodily lifted and carried from place to place.

Still another object is to provide means for shifting the jack at its bottom while it supporting a load, when it is found desirable to do so.

Other minor objects will appear `in the subjoined description.

The invention consists in certain novel fea tures of construction and arrangement of parts, as will he hereinafter described and trimmed, reference being had to the accom panying drawings, in which Figure 1 is a side elevation of the device. Fig. 2 is an elevation of the rear side thereof. Fig. 3 is a perspective view. Fig. 4; shows an extension section of the lifting rack. Fig.

5 is a sectional view taken on the line 5*?) of Fig. 2, looking in the direction oi the arrow, to show the arrangement for operat` ing the lifting rack, below said arrangement 1poing omitted for clearness; and, Fig. 6 shows a sectionalI view taken on the line 6-6 of Fig. 2, looking in the direction of thearrow.

My device may be made of any suitable' material, hut I usually employ steel in its construction.

Referring further to the `drawings, the numeral 1 indicates the frame of the jaol` the parts oi: the device' vwhich maybe formed nii a 1I metal bent intr) the :lio-rin oi: or 'it may heftornied oit a united together hy scr preferred manner. lin sides the frame is prov' nal opening or slot 'z2 e"tend length. thereof, and in this sl: rack 3 moves up and down. a lid 4c suitably secured tl' with an opening 5 thro rack passes, as shown in i is prov.' led .in upper i. allel. shafts 6 and ir/urna' the iframe, and on thee1 ried int-ermeshing .g spectively, with the v ing with the li;

l2 adjacent ratcl'iet is providedwith a cooper; g lWhen the load to he liJ .l he lifted in the ordinzuyv u l2, l employY an ment consisting neotioir with the i lever works on apiv with a slot 1G so the i neo! .i the saine hy a downward movement .r outer end oi the lever.

" .lll imi oif' said slot, as more clearlyv iluetraied w tiny other ordinary arrangement o? i i' rack and guiding moans therefor rf employed equally well with my no ru' In order that the ravit may' have range of longitudinal movement to :Map jack to exceptional casos where an miner high lift isto he iliade, iiorni the rin two sections, the lower section o" heir trated in Fig. t. The lower end oli l section 3 is provided with a here iii, upper end of the lower section 3d is pro .i

= tionary on its support. atl' to receive these smaller wheels.

with a pin 22 which takes into said bore when it is desired to use the lower of the rack.

Special attention is now called to an important feature of my invention employed for moving it along the railroad track, and also for shifting the lower end of the jack while it is supporting a load. 'lhe frame 1 pro Cided near its lower end with a shaft parallel with the shafts G and 7. This shaftl 23 is journaled in opposite sides of the frame, and has three wheels rigidly secured to it., namely, a flanged wheel 2l: approximately at its center, and two smaller wheels 25 on its outer ends which ends project sut'ticiently beyond the sides of the boX or frame These wheels 25 are provided with a plurality of openings 26. Figs. 2 and 6 of the drawings very clearly illustrate the arrangement just described.l At a suitable distance above the '..heels 25, the handles 27 are pivotally mounted on the sides of the frame, and are adapted to drop down into parallelism with the frame when not i'n use. When it is desired to use the handles to move the' jack, they are swung up into a horizontal position as indicated in dotted lilies in Fig. 2, in which position the corners 28 at the upper end of the handles come into abutting ehgao'enient with the handle mountings 29, to 4 oil-5d the handles against further upward movement.

The wheel 24 projects somewhat below the lower eiid of the frame 1, and is designed to run along one of the rails of the railroad track when desired in moving the device.

Sometimes in lifting one end of a burden While the other end remains on the ground or atleast in a stationary position, the lifted end of the load travels in the arc of a circle and moves to some extent horizontally away from the base ot' the jack which remains sta- The result of this is that in making very high lifts, or lifts in which the lifted end of the burden is only a compaiatively short distance from the stationary end thereof, it sometimes becomes very desirable to move the lower end of the jack a little nearer to the burden, to follow up the load, so to speak. This will at times be specially true when the load is to be lifted so high that the lower section a of the lifting rack is employed. Moreover, the heavier the load supported rby the jack the greater will be the importance at times of being able to nieve the base of the jack toward the load as just described. Whenever it thus becomes necessary to move the base of tie jack forward on the railroad track toward the load being lifted, the outer end 14a of the lever 14, or any other suitable tool, f is inserted in one of the openings 2G of the wheels 25 and the lever hen moved for- Wardly to impart forward rotation to the section 3 aeaoee flanged wlieel 24, which will move the base of the jack toward the work. A rearward ii'iovement of the lever would, of course, move the base ot the jack from the work, if that were ever desired.

The shaft journaled a suitable distance above the lower end of the jack to prevent the wheels which are of less diameter than the wheel 24, from projecting beyond the bottom ot` the jack, where they would be unduly exposed.

The jack is provided ou its bottom with i-einovable brads 30 which may be used under circumstances where there would be danger of the bottom of the jack slipping under its load, as for instance when the jack stands on icy ground.

Special attention is now directed to ap plicants unique arrangement of parts which enables one man to simultaneously operate both the crank 12 and the lever 14. With the arrangement of the parts as shown, the operator ordinarily stands behind the j ack facing his work and turns the crank forwardly with his right hand. This brings his left hand next to the lever 14 so that he can most con veniently operate the, lever with his left hand while operating the crank With his right hand. Moreover, in very heavy Work, when the operator is giving a very strong upward pull on the crank 12 with his right hand, he can place his lefthand on the lever 14 and bear down thereupon, thereby utilizing the lever 14. to gain a stronger purchase in lifting the crank 12.

The principle just referred to applies so fully that if the operator places his right hand on the crank 12, when in its downward position, and his left hand on the lever 14, and then moves his hands farther apart by drawing up his right hand-holding the crank-toward him, and moving his left lian'd outwardly from him-pushing the lever downwaitlynthe device will be operthe leverand the lever forms a purchase for" operating the crank, and the power applied in the operation is only limited bythe power of the operator to spread his arms apart, toggle fashion, drawing one toward him and pushing the other from him. In fact, the operator virtually makes of himself for the time being, a toggle for siinultaneously operating the crank and lever. In this way a skilful person is able to exert tremendous power; and hence it will be seen that this special arrangement will permit one person to lift a prodigious load when he has to work alone, and will thusy enableone man working by himself to do heavy work that would ordinarily require two or three nien.

Having thus described the principles of my invention, and shown one method of practically embodying the same, lf yet do not wish to be limited to the exact showing made, but desire protection on :lll that comes clearly within the spirit and scope of my invention.

Wlmt I claim as' new and tect by Letters Patent is :E

A (lovico of tho character described, coin- ]n'ising :n frame pi'ovitlod with means for elevating :t load, smid means being adopted to engage tho load at the front side of the jack, and including a Crank at one side of the desire to projaok adapted to be rotated forwardly from the rear side of the frame by one hand of the operator, from the opposite side of the frame adjacent to the other hand of. the operator when standing at the roar sido of the jack facing the load; whereby .to pol-mit the operator to simultaneously work both the crank and the 2 lover While faoino the Work.

In tostlmony Wiliereof l'afixiny signature.

JACOB SARDO.

anda` lever extending rearwardly l5

Images