US1220512A - Lifting-jack. - Google Patents

Description

H. H. HASELTON.

LIFTING JACK.

APPLICATION FILED MAY a. 1916.

Patented Mar. 27, 1917.

w vbweooeo TATE HALSEY I-I. HASELTON, 0F HASELTON, NEW YORK.

LIFTING-JACK.

Specification of Letters Patent.

Patented Mar. 27, 1917.

Application filed May a, 1916. Serial No. 95,202.

To all whom it may concern:

Be it known that I, HALsnY H. HASEL- TON, a citizen of the United States, residing at Haselton, in the county of Essex, State of New York, have invented a new and useful Lifting-Jack; and I do hereby 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.

This invention relates to a new and use ful lifting jack, and an object of the invention is to provide a simple, efficient, practical and improved device of this kind for raising heavy commodities step by step.

Another object of the invention is the provision of a device of this kind involving improved features of construction.

One of the features of construction is the provision of a standard or upright having an integral base, which is rigidly reinforced relative to the standard and secured upon a platform, and having a lever pivoted at its upper end, to engage under the commodity to be elevated or raised, there being a pivoted lever mounted upon the platform and having a roller to engage under the first lever, whereby upon moving the second lever the first lever will be gradually raised upon its pivot.

Another feature of the invention is the provision of a ratchet means to hold the second lever in different adjusted positions, there being a stop on the first lever to be engaged by the roller for limiting the second lever in its movement.

In practical fields the details of construction may necessitate alterations, falling within the scope of what is claimed.

The invention comprises further feature, and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view in perspective of the lifting jack constructed in accordance with the invention.

Fig. 2 is a view in side elevation of the lifting jack, showing the ratchet means and the abutment or stop.

Fig. 3 is a plan view of the structure shown in Fig. 2.

Fig. 4 is a view showing another form of ratchet means.

Referring more especially to the drawings, l designates the platform and 2 a suitable standard or upright, which is provided with an integral base 3 having an integral brace d between the base 3 and the upright. The base 3 is secured by means of bolts or the like 5 to the platform 1. By means of a pivot 7 a lever 6 is pivotally united in the forks Sat the upper end of the upright or standard 2. The lever 6 in its normal position inclines downwardly as shown clearly in Fig. 1. Secured on the base 1 by means of a bolt 9 is an angle plate 10, to the vertical ear 11 of which a lever 12 is pivoted by means of a pivot 13. The lever 12 engages the side of the lever 6, and is provided with a lateral pin lel, on which a roller 15 is journaled. This roller 15 engages under the lever 6, so that by moving the lever 12 on its pivot in the direction of the arrow a, said roller 15 rides against the under edge of the lever 6, thereby elevating the same, which in turn will raise any suitable article .or the like that may be supported thereon. In Fig. 2 a larger angular plate 16 is secured upon the platform 1 by means of the bolts 17. The upright portion 18 of the angular plate 16' has its edge provided with a plurality of ratchet teeth 19, which are to be engaged by the spring pressed pawl 20 (which is pivoted at 21 to the lever 12) so that when the lever 12 is moved upon its pivot 22, the pawl will act to hold said lever in different adjusted positions. Projecting downwardly from the upper edge of the lever 6 is an abutment lug or stop 23, which is to be engaged by the roller 15, when the lever 12 is moved to the position shown in Fig. 2. When lifting or raising anarticle, the same is placed upon the lever 6, when it is disposed as shown in Fig. 1, subsequently to which the lever 12 may be moved in the direction of the arrow a, in which case the lever 6 may be moved to the position shown in Fig. 2 thereby raising or lifting. the commodity or article on the lever 6. In Fig. 4 the roller 15 is eliminated, and in lieu thereof a laterally extending lug 24 is provided, to engage and ride over the teeth 25 on the under edge of the lever 6, so as to insure holding the lever 12 in adjusted positions.

The invention having been set forth what is claimed as new and useful is In combination, a platform, an upright mounted thereon at one end, a lever pivoted to the upper end of the upright, a segment toothed rack on the platform at the opposite end to the upright, said lever having a series of ratchet teeth extending from a point substantially directly over the segment toothed rack toward the free end of the lever and provided with a stop lug at the point from which the teeth extend, a second lever pivoted to the segment toothed rack and provided with spring tensioned pawl to cooperate with the teeth of said segment and provided with a lateral lug disposed on the second lever at a point substantially corresponding to the height of said standard, to ride over the teeth of the Copies of this patent may be obtained 1'91 five cents each,

first lever to engage any one of said teeth to hold the first lever in different positions, and to take the strain oil the second lever and its spring tensioned pawl, the stop lug acting to limit the second lever When contacted with by the second lug.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

HALSEY H. HASELTON;

Witnesses:

GRAZIA G. HAsnLToN, GLADYs G. HAsEL'roN.

by addressing the Commissioner of Iatents,

Washington, I). G.

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