US367973A

US367973A - Wagon-jack

Info

Publication number: US367973A
Authority: US
Publication date: 1887-08-09
Anticipated expiration: 1904-08-09

Description

N.L..HAKES.

WAGON JACK.

(No Model.)

Pten'ted Aug. 9, 1.887.-

INVBNTOR s4 BY dad/W141 WITNESSES ATTORNEYS.

u. PETERS. mq-Lmm m Wailing l nc UNITED STATES PATENT OFFICE.

NATHAN LE'WIS'HAKES, OF GRAFTON, NEW YORK.

WAGON-JACK.

SPECIFICATION forming part of Letters Patent No. 367,973, dated August 9, 1887.

' Application filed May 17, 1887. Serial No. 238,474. (No model.)

To all whom it may concern:

Be it known that I, NATHAN Lewis HAKES, of Grafton, in the county of Rensselaer and State of New York, have invented a new and Improved Wagon-Jack, of which the following in which similar letters of reference indicate and secured therein by a pin, a.

corresponding parts in both the figures.

Figure 1 is a side'elevation of my improved wagon-jack with one side of the upright frame removed and parts in transverse section on the line 00 w of Fig. 2, and Fig. 2 is a front view of the jack with the lever raised.

The frame of the wagon-jack consists of a sill or ground-plate, A, and two uprights, B

B, which are preferably tenoned into the sill At the front of theljack two metal plates or tie bars, O G, are fastened by screws or bolts to the uprights B B and space them apart a suitable distance to receive between them the operatingparts of the jack, p resen'tly explained, and at the same time brace the uprights strongly to each other. In the space between the uprights BB and between the tie-plates O G and metal guidepins D D, passed transversely through the uprights, the stem or bar E of the jack-head F is fitted to slide snugly up and down. The head F is formed with a series of shoulders or steps, f, either of which may be applied beneath an object to be raised by the jack. The bar E is provided with a lug, e, to which one end of the cross-head G of the jack-lever H is pivoted by a pimp, and the other end of the cross-head G is pivoted by a pin, h, to the forked upper end of a rock-bar,'I, which in turn is pivoted at its lower end to and between the uprightsB B by a heavy pin, i, passed through the uprights. The bar E and head F,

therock-bar I, and the lever H are preferably made of metal, and the lever is provided with a wooden handle, 72 for convenience in working the device.

The'operation is as follows: The jack will be placed beneath a vehicleaxle or other object to be raised while the lever H and rockbar I are in the positions shown in full lines in Fig. l of the drawings, and when the proper shoulder, f, of the jack-head is set beneath the axle or object the lever will be lowered to the position indicated in dotted lines in the drawings, thereby swinging the bar I inward and bringing it about into line with the cross-head G of the lever and carrying the center of the pivot h forward of an imaginary line drawn through the centers of the pivots g i, while the cross-head, and it may be the rock bar also, stop against the inner side of the bar E, v

in which positions of the parts the head F will be securely locked against any pressure brought upon it from above. To lowerthe jack-head, it is only necessary to raise the lever and the head will fall to rest by shoulders on it upon the upper tie-plate O and guidepin D, as will be clearly understood from the drawings.

It will be noticed that the bar E and head F are always raised and lowered perpendicularly; hence there is no tendency to swing the load lifted by the jack, and strain and wear of the parts of the jack and on the vehicle or other object lifted by it are reduced to a minimum, and verylittle power is required to work the jack effectively.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent The combination, in ajack, of a frame com prising a sill, A, and uprights B B, tie-plates C O, and guide-pins D D, fitted to the frame, a jack-head, F, having a bar, E, fitted between the parts B O D, a rock-bar, I, pivoted at i to the frame, and a lever, H, having a crosshead, G, pivoted at e to the bar E and at h to the bar I, substantially as shown and described.

NATHAN LElVIS HAKES.

Witnesses:

IRVING S. SoRIvEN, JosEPH S. SAUNDERS.