US728096A - Bolt or spike puller. - Google Patents

Description

No. 728,096. PLTLNTLD MAY 12,1903.,-

o. GILTNLR.`

BOLT 0B. SPIKE FULLER.

APPLIOATION'FILBD MAR. 10| 1903.

No MODEL.

UNITED STATES Patented May 12, 1903.

OLIVER GILTNER, OF PORTLAND, OREGON.

BOLT OR SPIKE FULLER.

sPEcIFIcATIoN forming part of Letters Patent No. 728,096, dated May 12, 1903.

-Applicationflled March 10, 1903. Serial No. 147,136. (No model.)

To a/ZZ whom if may concern.:

Beit known that I, OLIVER GILTNER, a citizen of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented new and useful Improvements iu Bolt or Spike Pullers, of whichv the following is a specification.

This invention relates to improvements in bolt and spike pullers, the prime objects in? view being to produce a powerful and efficient device at a reasonable cost and which is adapted to firmlyT grip the body of a bolt or spike and gradually and with slight laborl upon the part of the operator draw the same from heavy timber,and this,too,wthout bending or otherwise rendering said bolts or spikes` unfit for further use as such.

Other objects and advantages of the invention will hereinafter appear,-and thenovel features thereof will be particularly pointed out in the appended claims.

Referring to the drawings, Figurel is a side'` base-plate 1 and an upper head-plate 2, bothof which are preferably circular. These base and head plates are connected at intervals byA standards 3,which serve to space the two plates apart and combines with them to form a strong and rigid frame. These parts are preferably formed of cast-steel and may be integral, if desired. Each of the plates 1 and 2 is provided with a central opening 4, (see dotted lines Fig. 1,) the opening in the plate 1 serving as a passage for the bolt Vor spike 5 and that in the plate 2 for the feed-screw 6, hereinafter mentioned.

Mounted to rotate on the upper or head plate 2 is a nut 7, provided on its upper side with a raised squared boss or. shoulder S, capable of receiving the head'of a wrench 10. This nut is' provided with a central opening 9 and within the same is loosely threaded an externally-threaded vertically-disposed feedtiinber.

`shaft 6, hereinbefore referred to. The shaft Aspreader 12, as at 15, are depending links 16,

each ofwhich is at its lower end pivoted, as at 17, to the upper ends of a pair of toggle- Ylinks 18,'the latter in turn being pivoted, as

at .19, to a pair of toggle-jaws 20. The toggle- Vjaws 2O are curved toward each other at their lower ends, each terminating in a grippingface 21, and toward their upper ends diverge,

'being provided. with oppositely inclined wedging faces V22, which take at opposite sides of the spreader 12.

The operation of the invention will be readily apparent and is briefly explained as follows: By manipulating the lever or wrench `10 in one direction the feed-screw 6 may be run down through the nut 7 a sufficient distance to enable the gripping-surfaces 21 of the jaws 20 to clamp or grip the opposite sides of a bolt or spike 5, when the direction of rotation of the wrench being lreversed the draft through the links 18 and 16 causes the said jaws to tighten and a further upward .movement given the feed-screw to gradually and vvertical-ly draw the bolt or spike from the If the bolt or spike is too long to be ,withdrawn by the limited travel of the screw, the direction of the latter may be again reversed, the upper or exposed portion of the bolt or spike passing upward into and beyond the same, as illustrated in Fig. 1, a new and lower grip taken and the operation repeated as many times as may be found necessary. It will be observed that the action of the jaws in gripping and relax-ingfis au-tomatic and is the result of feeding the screw either upward or downward.-V

Having described my invention, what I claim is- A s 1. In a bolt or spike puller, the combination of a frame having -upper and lower heads provided with alining openings, a rotatable nut seated on the upper head and adapted to receiveawrench,ahollowfeed-screw threaded in saidnut and located in the upper opening, a head swiveled at the lower end of the screw, opposite pivoted vertical links depending from the head, a pair of gripping-jaws located at opposite sides of the swiveled head and having at their upper ends inclined faces acted upon by the said swiveled head, and toggle-links connected pivotally to the lower ends of said vertical links and at their outer ends to said jaws below the inclined faces of the latter.

2. In a bolt or spike puller, the combination of a frame having upper and lower heads provided with alining openings, afeed-screw located in the upper opening, a head swiveled at the lower end of the screw, opposite pivoted vertical links depending* from the head, a pair of gripping-jaws located at opposite sides of the swiveled head and having at their upper ends inclined faces acted upon by the said swiveled head, and toggle-links connected pivotally to the lower ends of said vertical links and at their outer ends to said jaws below the inclined faces of the latter, and means for rotating the screw in either direction.

3. In a bolt and spike puller, the combination of the upper and lower heads 2 and 1, provided with alining openings 4, the interiorly threaded and shouldered nut '7, the operating-wrench having head 10 fitting said shouldered nut, the hollow feed-screw 6, terulinating,r at its lower end in the head 11, the square spreader l2, having the recess 13 to receive said head l12, and opening 14, opposite links 16, pivoted at their upper ends as at 15 to the spreader, the curved grippingjaws 20, terminating in grippers 21, and having the opposite inclined faces 22, and the short toggle-links 18, pivoted as at 17, to the lower ends of links 16, and at their outer ends as at 19 to the jaws 20.

In testimony whereof I affix my signature in presence of two witnesses.

OLIVER GILTNER. Vitnesses:

H. G. GREENE, R. D. DEPUE.

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