US890459A - Lifting-jack. - Google Patents

Description

N0.890,459. PATBNTBD JUNE 9,1908. W. A. SCOTT, J. J. KING an G. J. BROWN.

LIFTIN G JACK.

APPLIOATION FILED 001231, 1907.

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WILLIAM ALONZO SCOTT, AJOHN JONES KING, AND CHARLES JAMES BROWN, OF CONSUL, ALABAMA.

LIFTING-JACK.

Specification of Letters Patent.

Patented J une 9, 1908.

Appucaaon mea october a1, 1901. seria No. 400,049.

To all 'whom it may concern:

Be it known that we, WILLIAM A. SCOTT, JOHN J. KING, and OHARLES'J. BROWN, citizens of the United States, and residents of Consul, in the county of Marengo and State of Alabama, have made certain new and useful Improvements in Lifting-Jacks, of which thel following is a specification.

Our invention is an improvement in lifting jacks and consists in certain novel constructions and combinations of parts hereinafter described and-claimed.

Referring to the drawings forming a art hereof-Figure 1 is a perspective view o the improvement in operation. Fig. 2 is a side view partly in section, and Fig. 3 is a detail perspective view of the base.

The present embodiment of our invention comprises a base 1 of substantially U-shape, the base being adapted to rest upon the ground, and to receive the end of the tie 15 between the arms 2 thereof.

The body portion of the base is recessed as at 5, and the upper face is slotted as at 6, for a purpose to be resentl described, and that portion of the ody a jacent to the arms is rounded as at 7 to form a seat, a pair of spaced lugs 4 being arranged at each end of t ie rounded portion.

The one end of a plate spring 8 is received within the recess 5, being retained in place by a set screw 10, and the other end of the plate spring is provided with spaced bearings 9,' between which is ivotally mounted a vertical arm 1 1, rovid ed on 011e side with a plurality of noto es 12, and at its bottom with a lug 16 for limiting the swinging motion of the arm with respect to the plate sprinv.

A pinch bar 13 is provided on its Iower face with a plurality of recesses 14, arranged to t the rounded portion 7 of the base and to rock thereon, as shown in Figs. 1 and 2, and the notches 12, are adapted to receive the free end of the bar when the tie has been elevated into contact with the rail, whereby to retain the tie in such position.

In operation, the jack is placed in the position shown in Figs. 1 and 2, and the point of the bar is inserted beneath the tie, with one of the recesses in the bar engaging the rounded ortion 7 of the base. The bar is now roc ed until the tieis in engagement with the base of the rail, when tlie'handle of the bar is engaged with one of the notches in the vertical arm, thus retainin the tie in the desired position during the riving of the spikes.

The jack is simple in construction and economical, and is also easily handled, since it may be made comparatively light, there being no great strain upon any part of the same. The plate spring 8, permits the tie to give somewhat during the operation of drivin the spike, yet returns the tie to its origina position as soon as vthe force of the blow is passed.

When assembling the improved jack, the end of the plate spring is inserted in the recess, and the screw 10 is turned into position, the slot 6 being provided to permit access to the screw.

While we have described the pinch bar as .beingprovided with recesses for engaging the seat on the base, it is obvious that an Ordinary pinch or claw bar might be used.

We claim- 1. A lifting jack comprising a U-shaped base, the arms of which are adapted to receive therebetween the end of a tie, the body portion of the base being provided with a recess and with arounded )ortion having at each end thereof a lu a plate spring having one end received in t e recess and the other provided with spaced bearings, a notched arm pivoted between the bearings and provided with a lug for limiting the swinging motion thereof with respect to the spring, and a pinch bar resting between the vertical lugs, and provided with a plurality of recesses`for engaging the rounded portion of the base.

2. A lifting jack comprising a base provided with a recess and with a rounded ortion having at each end thereof a lug, a p ate sprin having one end received in the recess and t e other provided with spaced bearings, a notched arm pivoted between the bearings and provided with a lug for limiting the swinging motion thereof with respect to the spring, and a pinch bar resting between the vertical lugs, and provided with a plurality of recesses for engaging the rounded portion of the base. 4

3. A lifting jack comprising a base provided with a recess and with a rounded ortion having at each end thereof a lug, a p ate spring having one end received in the recess, a n otched arm pivoted to the end of the spring and provided with a lug for limiting the swinging motion thereof with respect to the spring, and a pinch bar resting between the vertical lugs and provided with a plurality of recesses for engaging the rounded portion of the base.

4. A lifting jack comprising a base provided with a seat, a late spring having one end connected With t e base, a notched arm pivoted to the other end of the s ring, and a pinch bar provided With a recess or engaging the seat on the base, the end of the bar being adapted for engagement by the notches of the arm.

5. A lifting jack comprising a base provided with a seat, a plate spring connected with the base; a notched arm connected with the s and a pinch bar having a recess for errlgamng the seat and adapted to be engaged b tne notches of the afm.

6. A ifting jack comprising a base provided with a seat, a plate sprmg connected With the base, a notched arm connected With the spring, and a inch bar for engaging the seat and adapted) to be engaged by the notches of the arm.

WILLIAM ALONZO SCOTT. JOHN lJONES KING. CHARLES JAMES BROWN.

Witnesses S, K. MOMJLLAN, F. B. KING.

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