US1499777A - Jack - Google Patents

Description

Jufiy 31 1924. 1499,???

1 .1. L. HICKEY JACK Filed Dec. 11 1922 2 sheet e 1 .INVENTOR- 1 J. L. HICKEY 4 v JACK Filed Dec; 11, 1922 2 Sheets-Sheet 2 Patented July 1, 1924.

UNETEE STATES meant.

Parametric-a JAMES L. HICKEY, OF MILWAUKEE, WISCONSIN.

max.

Application filed December device of this character designed to be serv-- iceable as an ordinary jack and also for nipping purposes as used in railroad construction work for the purpose of holding a tie up to the rail until it is spiked.

Another object of my invention is to pro- I vide means for lifting or lowering objects having provision for pulling out spikes and also having provision for getting readily under heavy objects lying close to the ound.

vA still further object of my invention is to provide a combined or interchangeable jack and nipper such as may be used. advantageously in connection with moving heavy machinery, riggers, pile drivers operation, erectors and other heavy objects, and in all cases where the conventional lifting jack in use will not get under anything close to the ground.

A still further object of my invention is to provide a device easily and simply constructed and assembled in position designed to accelerate the downward movement of the weight lifting part or parts of my invention so that gravity may be effective to provide a quicker means of moving the lifting part or parts than the mechanical means emloyed in my invention.

"With the above and other objects in view my invention consists in the combination, ar-

rangement and details of construction disclosed 1n the drawlngs and specificatlon,

and then more particularly pointed out in the appended claims.

In the drawings, wherein similar reference numerals designate similar parts throughout the several views,

Figure 1 is an end elevation of my invention, I

Figure 2 is a front elevation thereof, Figure 3 is a top plan view thereof, Figure 4: is a' cross-sectional view therethru,

11, 1922. Serial No. 606,326.

Figure 5 is a view in elevation of my invention, partly in section,

Figure 6 is another end elevation of my invention, Figure 7 is a view similar to Figure 6 but showing the rail shifters to be described in operative position,

Figure 8 is a fragmental vertical eleva tion, partly in section,

Figure 9 is a fragmental detail view partly in section showing the pawls in engagement with the racks,

Figure 10 is an end described,

- Figure 9? is a view similar to Figure 9 but sholiving the pawls disengaged from the rac v Figure 11 is a fragmental sectional view showing the dovetailed connection between upright and shifter, and;

view of a pivot ,to be Figure 12 is a fragmenttl'l detail View of a platform shank. Referring to the drawings which are merely illustrative of my invention 1 designates a base support for a frame consisting of the parallel oppositely-arranged uprights 4: and -5 having a strut connection at 2 and, 3 respectively, with said base support 1. The opposite outer edges ofthe uprights are provided with jagged surfaces or teeth forming thereby longitudinal racks 5, it being noticed that the rack teeth on one edge of an upright are disposed in staggered relation with respec to those on the opposite edge. The inner sides of the uprights carry the tracks or longitudh nal rails 6 and 7 upon which slidably straddle the slides 8 and 9 formed with outwardly projecting pivots 10 and 11 which are cylindrical in outline, the terminals of which pivots 12 and 13 being polygonalkin shape. Before the uprights 1 and 5 are secured to the base support 1 one slide 8 is placed in position to slhle upon one rail say, 8; a block forming part of a movable carriage or platform support and designated 19 has a lateral opening (not'designated) into which partly projects one pivot, say 10 so that terminal 12 of this pivot protrudes centrally in opening 14 formed in a shank 15 carrying on its upper end a platform17, this shank 15 projecting thru a relatively long slot 16 formedceiitrally in the block 19; now the other polygonal terminal 13 of pivot 1-1 is next inserted into opening 14.- of shank 15.

be seen that shank 15 is positioned in an upright manner in vertical or longitudinal alinement-with slides 8 and 9, so as to insurea Strictly vertical movement of this platform'support or carrying shank 15 at all times. The jack head or platform 17 comes 2 to rest upon the top beam 18 connecting the upper edges of uprights 4 and 5, and it is deadapted to serve as a spike puller. The opposite end. of the block may be made in variousshapes as may be best found suitable in ordinary practice. It is designed to provide a handle 20 of suitable length and.

curvature as a means of giving the proper leverage to the block 19; the handle is shown by way of illustration as made in one piece with the block althoit is within the range of my variable construction to form a sleeveupon the block and let the handle fit therein. These and otherchanges are intended to be covered. A pair of U-shaped pawls or bails are provided to ride upon the racks. .One bail consists of the rod 24 having the outwardly converging limbs 25, 26 connecting the transverse rung 27 which is pivoted at one end of the block 19. The other bail is similarly shaped having the rod 24 with converging limbs 25, 26 ending in the transverse rung 27 pivoted to the opposite end of block 19. .The rods 24, 24' are preferably made longer than rods or rungs 27, 27 and these rods 27, 27 are the parts that enter successively the teeth of the racks 5, being held yieldably and slidably within these notches or racks 5 under influence of contractile springs 28 and 29 the ends of which are attached directly to the rods 24, 24 of bails, it being also noticed that one bail is preferably made slightly longer than the other and so that when either rod 24, or 24 of either bail is within one notch of the rack the other is within the nexthigher notch in staggered relation to the first notch. The bails also converge clownwardly in the direction of the racks, and the block is in horizontal position when the bails occupy the position shown in Figure 5. Now by taking hold of the actuating handle 20 on the block 19 and raising the same this act will also raise the bail having the rod 24 as shown in dotted lines in Figure 5, the other bail having the rod 24' serving as a prop to allow such raising of the first-named bail. The action of springs 28 and 29 is to draw both bails forcibly against the notches 5 so as soon as the ball has been raised sufliciently high it automatically springs or snaps into another notch 5'; now this bail .thus positioned acts as a prop for the other bail and this time the handle I is taken hold of and swung downwardly so as to raise the bail having the rod 24' which will automatically take into the next higher notch and in this manner the platform andblock will both be raised or lowered accordingly as the handle is moved upwardly or downwardly, and in this manner a pawl and ratchet or pawl and rack mechanism is had whereby a step by step movement is their outer longitudinal edges willclear the.

inner parts of notches or rack teeth 51, 51. There is a shaft 32 suitably mounted in upright 4 andcarries a two-lobed'cam 33 the lobes'of which are out of engagement with the shifters when the rails 30, 31 are out of engagement with the pawls or bails. A crank handle 34 turns the shaft 32 and brings the lobes of cam 33 into a gradually reaching horizontal position and this cam will at the same time spread 'out the rails I 30, 31 which ride in the grooves 37 so the outer edges of these rails force rods 24, 24' of the bails out of the notches and allow these rods to slide down the outer edges of the rails 30, 31 so gravity may accelerate the downward movement of the carriage with platform 17 and claw 22. The rails 30, 31 move'against the bails in spreading out relation against the tension of springs 35 so by bringing the crank back to its normal horizontal position the springs 35 will pull back rails 30, 31 and allow the bails to'automatically reenter the notches of the racks. The claw 22 of course serves as a nipper for elevating heavy workand is, optional and may be omitted and the platform 17 goes under any object just like an ordinary jack. The notch 23 in claw 22 will allow a spike being held therein in the act of ejecting same.

All modifications within scope of claims are claimed herein.

WVhat I desire to claim and secure by Letters Patent is 1. A jack comprising a base and two opposed substantially vertical "uprights, parallel vertical guides on the inner faces of said uprights, each of said uprights having ratchet teeth projecting from its opposite J. L. HICKEY 4 v JACK Filed Dec; 11, 1922 2 Sheets-Sheet 2 !1/JEEEEEBY W l %/B5 jam INVENTOR

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