US542645A - Railroad lifting-jack - Google Patents

Description

(No Model.)

J. A. HOLMAN. RAILROAD LIFTING JACK.

No. 542,645. Patented July 16, 1895.

JAMES A. l-IOLMAN, OF SALIDA, COLORADO.

RAILROAD LIFTINGO-JAOCK.

. SPECIFICATION forming part of Letters Patent No. 542,645, dated July 16, 1895.

Application filed May 31,1895. Serial No. 551,313. (No model.)

To all whom it may concern:

Be it known that I, JAMES A. HOLMAN, a

citizen of the United States, residing at Salida,

in the county of Chaffee and State of Colorado, have invented certain new and useful Improvements in Railroad Lifting-Jacks and I do 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, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

The special object of the invention is to hold down car-wheels while a journal-box is being jacked up to put in a brass or journal bearing; and the invention consists in the hereinafter-described attachment applied to an ordinary jack-screw.

United States Patent No. l93,183 combines a jack and Wheel-clamp, but when made heavy enough to raise a car they are very awkward to handle, while some car-wheels do not project far enough to hold the foot-pieceg'and United States Patent No. 523,871 uses amovone which is convenient to handle, much less expensive, and which will sit anywhere under the journal-box, while the clamp is adjustable with respect to the wheel.

Figure l of the drawings is an elevation,

partly in section, showing my invention appiled; Fig. 2, a perspective view.

In the drawings, A represents the ordinary 'gether the bent jack used in lifting the journal-boxes of cars. This is provided with a head a, on which the journal-box is supported, this head having the usual holes a and carrying a male screw a B is the base of the jack, which is preferably made largest at the bottom, so as to make it sit firmly, is provided witha handle I), and has the part above the handle made cylindrical, as shown at b. In the interior of the upper partis formed centrallya female screw 11 to receive the male screw a Around the neck b I secure a band C of metal by means of the nut and screw D E, which clamp toparallel ends 0 0 upon the eye f of a screw F. i

G is a foot-piece which bears on the shoulder h of a car-wheel H to hold the latter down. This foot-piece carries a male screw I on its upper side, while the screws F and I are right and left, so as to enable a yoke J to screw on both and to bring them closer together or farther apart. By this means the jack is madeadjustable with respect to the wheel, and the most desirable position may al- Ways be assumed.

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