US810358A

US810358A - Railway-track jack.

Info

Publication number: US810358A
Application number: US29215804A
Authority: US
Inventors: John Stewart
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-08-15
Filing date: 1904-08-15
Publication date: 1906-01-16
Anticipated expiration: 1923-01-16

Description

PATENTBD JAN. 16, 1906.

J. STEWART.

RAILWAY TRACK JACK.

APPLICATION FILED AUG.15,1904. RENEWED DBO. 18,1905.

I I NW4 vilV i UNITED STATES JOHN STEWART, OF NEIV GLASGOW, CANADA.

RAILWAY-TRACK JACK.

Specification of Letters Patent Patented Jan. 16, 1906,

Application filed August 15, 1904. Renewed December 18, 1905. Serial No. 292,158.

To (all whom it may concern.-

Be it known that I, JOHN STEWART, a citizen of Canada, residing at New Glasgow, in the county of Pictou and Province of Nova Scotia, Canada,'have invented new and useful Improvements in Railway-Track Jacks, of which the following is a specification.

My invention relates to improvements in railway-track jacks whereby the same are operated with the ordinary crowbar or liningbar used by trackrnen at their work; and the objects of my improvements are, first, to dispense with the necessity of trackmencarrying a specialhandle for operating track-jacks second, to dispense with the necessary gear required for said special handle, and, third, to have a light strong convenient track-jack without unnecessary expense. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a perspective view of track-j ack as shown when in use. Fig. 2 shows trackjack broken down through the center, showing the position of the diflerent parts in their respective places; and Fig. 3 represents details of the device.

. Similar letters refer to similar parts throughout the views,

Referring to Fig. 2, A is a hollow cast or malleable iron stand broken down through the center, showing a hollow groove running vertically along its front side, in which is shown the hooked L-shaped lifting-bar B, on which is a loose jam-nut O, with a projecting handle which rests in the back part of stand A and passes out through, as shown, and also the loosejam-nut D, with a projecting handle which rests in the lower end of the link E, referred to hereinafter. On bar B is also a filling-ring H, which acts as a filler to keep the jam-nuts C and D sufficiently apart to freely admit the end of link E between their projecting handles, and also in combination with jam-nuts C and D when lowering the rail, as will be shown hereinafter. On the top of bar B is a screwed nut G, which prevents it from slipping out of place and also acts as a cap when load is lifted on top of bar.

Referring again to Fig. 2, E is a lifting-link which is supported in the pocket I, formed in the upper part of stand A. On the outer and upper edge of the pocket I is formed the solid fulcrum F and the removable wearlate F made of iron or steel and secured in e place by a screwbolt. The hook J on the back of stand A, directly above the projecting handle of jam-nut O, is used as a support for the end of the crowb ar when lowering the rail. The link E as used in combination with the hooked lifting-bar B, jam-nuts O and D, and filling-ring H is described in the following operation: To lift a rail or similar object, place the front side of base-plate of stand A and the L-shaped hook of lifting-bar B underneath the rail or object to be lifted. Then place the end of an ordinary crowbar over the fulcrum F and into the upper end of the link E and bear down the handle end of crowbar. This will cause the link E to rise and draw up the handle side of am-nut D, causing it to cant forward and grip the lifting-bar B, which in turn rises with the rail or object being lifted. At the same time bar B rises up through jam-nut O, which cants forward, gripping bar B and holding it as a pawl until the crowbar is raised, allowing link E and upper am-nut D to slide down to their former positions for another lift. Repeat this operation, as with an ordinary pump-handle, until the rail has attained the required height. To lower the rail, remove the crowbar from the link E and place the end of it underneath the hook J and over the projectinghandle of j am-nut C. Then press down the handle end of crowbar. This will cause jamnut O to cant and release its hold of bar B. At the same time the other end of jam-nut O rises up against the filling-ring II, which rises and presses against the forward side of jarn-nut D, which releases its hold of liftingbar B, allowing it, with rail, to drop to its former position.

I am aware that prior to my invention track-j acks were in use having hooked lifting-bar and jam-nuts. I therefore do not claim such a condition broadly.

What I do claim, and desire to secure by Letters Patent, is a railway-track jack comprising 1. The stand provided with the pocket I adapted to inclose link E and formed with the fulcrum F properly adjacent to said link.

2. The stand provided with the fulcrum F In testimony whereof I have signed my and the removable Wear-plate F. name to this specification in the presence of 3. The combination with the am-nuts of two subscribing Witnesses. the filling-ring and the link E interposed be- JOHN STEW ART. 5 tween said nuts, and operating as set forth. Witnesses:

4:. The stand provided with the hook J in ROBERT M. MAoGRRGoR,

combination With the jam-nuts as set forth. GEO. W. FRASER.