US321810A

US321810A - Wagon-jack

Info

Publication number: US321810A
Authority: US
Publication date: 1885-07-07
Anticipated expiration: 1902-07-07

Description

(No Model.) Q

- J. L. GRAY.

WAGON JACK.

Patente d'Jul y 7 1885.

Egg-WIDE .d ttogey'g.

NITED STATES PATENT Unmet...

JOHN L. GRAY, OF PESHTIGO, \VISCONSIN.

WAGON-JACK.

SPECIFICATION forming part of Letters Patent No. 321,810, dated July 7, 1885.

Application filed May 26, 1885. (No model.)

To all whom it may concern.-

Be it known that I, JOHN L. GRAY, a citizen of the United States, residing at Peshtigo, in the county of Marinette and State of Wisconsin, have invented certain new and useful Improvements in Wagon-Jacks; and I do de clare 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, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to certain improvements in wagon-jacks; and it consists in the construction, combination, and arrangement of the several parts, as will be hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation of my device, the different positions of the lever being shown in dotted lines. Fig. 2 is a vertical section of my jack, and Fig. 3 is a top plan view of the same, the sliding standard being shown in cross-section. Fig. 4 is a detail view of the tooth, and Fig. 5 shows indetail one of the retaining-hooks.

A and A are two standards held closely together, as shown. The standard A has secured to it at or near its upper end two hooks, a, which hold the standard A to its position. Its inner edge is formed into the notches a, the lower or base walls of which are inclined downward and inward, as clearly shown in Fig. 2. A tooth, to", inserted in the standard A, engages these notches, the purpose of which will be presently described.

Upon the front side of the standard A, I attach a rod, 13, which is rigidly secured to the standard at its upper and lower ends, as shown. I place a sleeve, 0, on this rod, and pivotally connect a bail, D, thereto.

The standard A is provided at its lower end with a tooth, a", the point of which projects downward and outward, as shown. The standard A is adjustable along the standard A, so as to adapt the jack to wagons and carriages of various heights. This adjustment is effected by placing the tooth a in different ones of the notches a, as will be readily understood from the drawings.

The upper end of the standard A is bifurcated, and the operating-lever E is pivoted within the bifurcation. The standard A is held close to the standard A by the retaininghooks and the peculiar construction of the notches a and tooth a The retaining-hooks a are composed of a flat or nearly flat main strip, secured at one end to the standard A, and provided at its other or free end with a circular lug placed at right angles to the main strip, as shown. The retaining-hooks are made of such a length that when in position a slight space is left between the standard A and the round lugs. This arrangement allows sufficient play to the standard A for the tooth a to readily pass the outer edge of the notches a.

It will be noticed that the toot-h and the notches are each inclined in such a manner that when they are in engagement they aid the retaining-hooks in holding the two standards together. By this combination of devices the standard A is effectually prevented from working off from the standard A.

E is the lever, which is operated in' the wellknown manner.

When my jack is in use, I counterbalance the weight of the vehicle by the use of the bail D, and sleeve 0 sliding on the rod B. The bail is pivoted to the sleeve near its lower inner corner, and extends round the standards and up over the lever, as shown.

When the jack is in use, the weight of the vehicle will tend to raise the long arm of the lever and allow the vehicle to drop off the jack. The long arm of the lever will bear against the bail D, which will communicate the pressure to the sleeve 0 and pull it around, so that its upper corner bears against the rod B. The friction of the bail against the lever and of the sleeve against the rod will be sufficient to hold the lever in its depressed position.

The operation just described will be fully understood on reference to Fig. 1.

Where so desired, the upper surface of the lever may be notched, and a rack-bar may be substituted for the plain bar shown; but good results are obtained by the use of the construction shown and described.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-= 1. The combination, in a wagon-jack, of a rigid standard provided on its inner side with a series of notches, a pair of retaining-hooks secured to the standard at its upper end, and a second standard adjustable along the rigid standard, and provided at its lower end with a tooth for engaging the notches in the rigid standard, substantially as described, and for the purposes set forth.

2. The combination, in a wagon-jack, of the rod B, secured to the front of the rigid standard, the sleeve 0, sliding along the rod B, the bail D, pivotally secured to the sleeve 0, and the lever E, substantially as described and shown.

3. The wagonjack hereinbefore described,

JOHN L. GRAY.

Witnesses:

H. H. llIAXWELL, FRANK J. ALBRECHT, R. O. PHrLBRooK.