US393358A

US393358A - Lifting-jack

Info

Publication number: US393358A
Authority: US
Publication date: 1888-11-27
Anticipated expiration: 1905-11-27

Description

(No Model.)

ILE. GLEV'ER.

LIFTING JACK.

INVENTOR 4 y .Attorney N. PETEns, Pham-ummm". wmxngm. o. cv

4MTED STATES PATENT Erica LIFTING-v-JACK.

SPECIFICATION forming part of Letters Patent No. 393,358, dated November 2'7, 1888.

Application filed May 1P, 1888. Serial No. 274,273.

.To aZZ whom, it may Concern:

Beit known that I, HENRY H. GLEVER, a citizen of the United States ofAmerica, residing at Cleversburg, in the county of Gumberland and State of Pennsylvania, have invented certain new'and useful Improvements in Lifting-Jacks; and I do 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, referencebeing had-to the accompanying drawings, and to the letters and liguresof reference marked thereon, which form a part of this specification.

My invention nas relation to improvements in lifting-jacks ofthat kind operated bya lever fulcrnmed to two depending rods, the free ends of which engage the teeth or steps of a rackstandard, as will be hereinafter more fully described.

In the accompanying drawings, Figure 1 is aside View in elevation. Fig. 2 is a transverse sectional View taken on the line x x of Fig. 1 and looking from the bottom. Fig. 3 is a detail side view ofthe housing on top ofthe rackstandard with the spreading slide removed, the channels through the housing being indicated by dotted lines. Fig. et is a vertical sectional view of the housing, taken on the line y y of Fig. 2, showing the rackstandard and one of the lifting-rods broken off.

Reference being had to the drawings,Adesig nates a base-piece, made of such dimensions as to meet the uses to which the machine may be designed. In this basepiece is rigidly secured the end of a standard, 1, having on its side edges racks or teeth 2, having inwardlyinclined-side faces and straight end faces, substantially as seen in the drawings, to permit the depending lifting-rods to easily travel on the racks, and to'lodge on the seats formed by their upper or end faces. The standard is eX- tended above the rack part, with its side edges flush ofthe points of the racks, and has formed across its side face a groove, 3, in which the broad ange on the spreading slide engages and operates to move the depending rods from engagement with the racks.

On the upper end of the rack-standard is rigidly mounted a housing or casing, 4, having vertical channels 5 formed through it,in which (No model.)

the depending lifting-rods arearranged. These channels are made broader than the width of the lifting-rods, in order that these rods may have a limited outward movement sufficient to permit them to be thrown out of engage ment with the racks. On the housing are secured springs C, the free ends of which press inward on the face of the depending rods and force them into engagement with the racks on the standard.

B designates a lifting-lever, formed with a weight-seat, 7, on its upper face between the points of connection to the depending rods, on which the weight is laid or engages. To the lever B, at points in line with the channels in the housing, are pivotally connected two depending lifting-rods, 8 9, having their lower ends turned inward, as at 10, the points ofthe turns setting on the ends of the racks with the inner faces of the turns against the inclined portions thereof. As stated heretofore, the ends of the springs C bear on the faces of the depending lifting-rods and keep them in engagement with the racks.

In the face of the housing is a transverse groove, l1, which aligns with the groove 3 across the standard, and in the grooveis fitted the spreading slide 12, which has formed on its inner face an inwardly-projecting tongue, 13, having its middle portion, 14, broadened to project in the groove 3 across the standard and engage the faces of the depending liftingrods.

To operate a spreading slide, a lever, 15, is pivoted on the' face of the housing, and has an arm, 16, which extends downward and engages in a verticallyarranged slot, 17, made in the face'of the spreading slide. By reciprocating the lever the spreading slide is in turn reciprocated, bringing the edges of the projecting part 14 alternately in contact with the inner faces ofthe lifting-rods and disengaging the lower ends from the racks.

My improved lifting-jack may be used to ad vantage not only for the purposes to which such implements are usually put, but it can be utilized as a log-lifter, a stump-puller, or as a means for forcing together the platens of a cider-press. A log may be lifted by making connection about the log and the lever, and the same arrangement will pull a stump.

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use it in a cider-press, a frame would be neeessary and the liftingjack operated in reverse position from that in which it usually stands.

Generally the operation is as follows: To lift the weight, it is arranged on the seat in the lever and the lever alternately reversed and lowered, which movements carry the liftingrods upward on the racks, each liftingrod becoming in alternation a fulcrum. To lower the wei ght, the levers are alternately operated, the movements of the lower lever thus throwing the lifting-rods to be thrown out of engagement in alternation and allowing them to be lowered by the movement ofthe lifting-lever. lf it be desired to simply lower the lifting mechanisimthe lifting'rods may he drawn from engagement with therack and carried down to the point desired.

What I claim isrlhe combination, with a base-piece, A,pro vided with a standard, l, formed with racks 2 on its side edges and having a transverselyarranged groove, 3, across its upper part, and provided with a housing, 4, on its upper end,

formed with vertical passages 5 to receive the litting-rods, and having a transversely-arranged groove, 11, across itsside face opening into thc groove of the standard, of a lifting-lever, B, formed with a weightseat on the upper edge, two depending liftiligl'ods, S 9, pivotally connected tothe lifting-lever and arranged in the vertical passages of the housing, with their free ends to engage the teeth of the rack, springs C on the housing arranged to press the lifting-rods in engagement with the racks, a lever, 15, fulcrumed on the housing and formed with a depending arm, 16, and aspreading slide, 12, having a tongue, 13, formed with a broadened middle part, 14, to engage the grooves ol the housing and standard, substantially as described, and for the purpose speci lied.

In testimony whercofI affix my signature in presence of two witnesses.

HENRY Il. CLEVER. 'Witnessesz W. A. Cox, JOHN L. MARTIN.