US30346A - Carbiage-jack - Google Patents

Description

UNITED STATES PATENT OFFICE.

JOHN J. PIKE, OF CHELSEA, MASSACHUSETTS.

CARRIAGE-J ACK.

Specification of Letters Patent No. 30,346, dated October 9, 1860.

T o all whom it may concern.'

Be it known that I, JOHN J. Plxn, of Chelsea, in the county of Suiollr and State of Massachusetts, have invented a new and useful or Improved Carriage-J ack, and do hereby declare the same to be fully described in the following specification and illustrated in the accompanying drawings, of which- Figure l, is a top view, Fig. 2, a side elcvation, Fig. 3, a longitudinal and vertical section and Eig. 4, a transverse and vertical section of it, the latter figure being so taken as to exhibit the arrangement of the lever catches by which the lifting lever of the jack is maintained either at its highest or at its lowest position.

In the drawings A, denotes a frame co1n posed of a bed plate a, and two pairs of standards or posts b, b, c, c', they being arranged as represented. The two front posts b, support the fulcrum pin CZ, of a lifting lever B, which is placed between them and the parts 0, c.

The lower end of a notched bearing bar or lever C, rests on the inferior or lower arm of the lever B, while the said bar C, is arranged at an acute angle with the lever B, and extends between the two posts of each pair b, b or c, c and is supported by a fulcrum or pin e, passed through the two posts c, c and such bar C.

The bar C, is constructed with a series of seats or right angular notches f, f, f, arranged along its upper surface as shown in the drawings. Furthermore a screw g, is not only passed upward through the slot h, of a cap plate z', (which is fastened to the upper surface of the smaller arm of the lever B, and formed as shown more particu'- larly in Fig. 5, which is a top view of the level' B,) but screwed into the lever C,and with the plate z', serves to connect the two levers in such manner as to cause the front end of the lever C, to move either upward or downward with that of the lever B, while the latter is being turned on its t'ulcruni.

Two lever stops 71e, Z, formed as shown in Fig. 4l, are applied to the inner side of one of the posts c, c', by means of two ulcra m, a, projecting from the' post. The opposite ends of the longer stop l, are bifurcated,

i the outermost prong of the upper fork being longer than its inner prong, the lower arm of the upper lever stop k, extends into the fork of the upper arm of the stop l, while the fork of the lower arm receives a spring 0, alixed to the post c. Then the lever B, is depressed so as to rest on a pin p, extending through the posts c, c the said spring o, will cause the longer stop to extend over the lever so as to estop it from being elevated, so when the lever B, is raised to its highestposition (that is up against the lever C,) the upper stop by the action of the spring. and the lower stop, will be forced to project underneath the lever in such manner as to retain it in its highest position. By pressing inward the upper arm of the lower lever stop both lever stops may be moved simultaneously on their fulcra and so as to carry either the upper arm of the upper stop, or the lower arm of the lower stop away from the lever B, as circumstances may require in order-to enable such lever to be either raised or lowered on its fulcruni.

By means of the notched bar or lever C, constructed arranged and applied to the frame A, and the lever B, in manner as specified the carriage jack can be readily ad justed to the axle of any vehicle preparatory to the raising of such axle with the jack. To accomplish the adaptation of the jack to an. axle, the former is to be pressed forward under the latter until the axle may enter one of the notches of the bar C. This having been done, the rear end of the lever B, is to be depressed. This will elevate the lever C, and the axle resting on it.

The advantage of my improved jack over that having one lever only (which of necessity must have means of adjusting its fulcrum in order that the lever may be properly applied to a carriage) is to be found not only in the case by which it may be adapted to an axle, but in the increased leverage which is applied by itin order to eiiiect the elevation of the axle. I therefore do not claim a carriage jack as constructedl with but one lever, Jfurnished with an adjustable fulcrum, but

I claim- 1. My improved carriage jack as constructed With the eXtra bearing lever C,c01n- X pin p, With the levers B, and C, applied bined and arranged With the lifting lever Within the frame A, and With respect to B, and the supporting frame A, substanl one another as specified. tially in manner and so as to operate as here- 5 inbefore described. Witnesses:

2. The combination and arrangement of R. H. EDDY, the tWo spring stopping levers la, Z, and the F. P. HALE, J r.

JOHN J. PIKE..

Images