US745142A - Lifting-jack. - Google Patents

Description

No. 745,142. PATENTED NOV. 24, 1903.

I A. R. BOLIN &: J. B. GOPR.

' LIFTI NG JACK.

ABPLIOATIUN FILED APR. 10, 1903.

no MODEL.

lulllllm UNITED STATES Patented November 24, 1903.

PATENT OFFICE.

ARTHUR RICHARD BOLIN AND JOHN BARTOW GOFF, OF CORDELE, GEORGIA; SAID GOFF ASSIGNOR TO HENRY H. BOLIN, OF OORDELE, GEORGIA.

LlFTlNG-JACK.

SPECIFICATION forming part of Letters Patent No. 745,142, dated November 24, 1903.

Application filed April 10, 1903. Serial No. 152,034. (No model.)

To all whom it may concern:

Be it known that we, ARTHUR RICHARD BoLIN and J OHN BARTOW GoFF, citizens of the United States, and residents of Oordele, in the county of Dooly and State of Georgia, have invented a new and useful Improvement in LiftingJacks, of which the following is a specification.

Our invention relates to an improvement in lifting-jacks, and is devised more particularly for usein removing brasses from car journalboxes, and the intention is to save time and laborin short, make provision whereby one man can accomplish what it has required two to do heretofore.

With these objects inview our invention consists in certain novel features of construction and combinations of parts, which will be hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view showing our improved jack in working position, and Fig. 2 is a side view with parts broken away to show the interior construction.

A represents the base of the jack, and 1 is the screw, having the usual head 2 swiveled thereon and provided with holes 3 3 to receive the bar 4, by which the screw is operated.

B indicates a dog hinged to the base A and provided with a downwardly-extending nose 5 at its outer end, which is adapted to engage the wheels 0 of the car, a pawl 6 being pivoted to the dog in position to engage the ratchet-toothed bar 7, whereby to retain the dog down in engagement with the wheel.

We have illustrated the application of our improved lifting-jack in Fig. 1, and in that view the parts are in position with the dog pressing downward 'against the car-wheel to retain it in position on the rail and the head screwed up against the lower side of the journal-box in the position of lifting the latter from its normal position. Heretofore the principal difficulty encountered in this work of removing brasses from car journal-boxes has been the holding down of the wheel while the car was being jacked up, which required the services of at least one man. Our improved lifting-jack effectually dispenses with this additional labor, the dog operating to hold the wheel down in place upon the rail while the box is sufliciently raised to relieve the pressure uponthe brass to admit ofits being removed, thusenabling one operator to 5 5 do the entire work of removing the brasses from a given wheel. The jack itself is operated in the usual way, as will be readily understood from the construction illustrated.

Thus it will be seen that a great saving is ef- 6o fected in both time and labor over the old method, with a corresponding saving of expense.

It is evident that slight changes might be resorted to in the form and arrangement of the several parts described without departing from the spirit and scope of our invention,

head, of a pivoted dog and automatic means for retaining it downward in different posi-* tions accordingly as set by the operator.

2. The combination with a base, and liftinghead, of a pivoted dog and means carried by the dog which operates automatically to retain the dog downward in looking position.

3. The combination with a base having teeth, of a gravity-dog pivoted thereto, and a gravity-pawl pivoted to the dog and adapted to engage the'teeth of the base and lock the dog downward, and alifting-jack adjustably connected with the base.

In testimony whereof we have signed this specification in the presence of two subscribing witnesses.

ARTHUR RICHARD BOLIN. JOHN BARTOW GOFF.

Witnesses:

M. H. HIOKSON, GEO. D. BOLIN.

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