US325411A - Assig - Google Patents

Description

(No Model.)

I. HOGBLAND.

LIFTING JACK.

No. 325,411. Patented Sept. l, 1885.

WYTJVESSES.

N PETERS. PhmoLimugnpher, wast-mgm, D c.

VUNiTED STATES PATENT rricn,

ISRAEL HOGELAND, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE-HALF 'IO GEORGE P. ANDERSON, OF SAME PLAGE.

LlFTlNG-JACK,

ECIFICATI'ON forming part of Letters Patent No. 325,411, dated September 1,

Application inea Apro r, 1855. (N0 model.)

To LEZ whom it may concern:

Be it known that I, ISRAEL HOGELAND, of the city of Indianapolis, county of Marion, and Statel of Indiana, have invented certain new and useful Improvements in Lifting- Jacks, of which the following is a specification.

' Generally, the object of my said invention is the same as that for which Letters Patent of the United States Xo. 259,393, dated June 13, 1882, were granted.

It consists in a rearrangement and simplification of the parts constituting said` liftingjack,and in certain new features, the principal ones of which are the forming of the storagecylinder within the vertically-moving stem of the jack instead of outside and separate therefrom, a new construction of valves between the storage and supporting cylinders and means of operating the same, a connection hetween the rack-bar and lever-supports which permits them to he revolved about the jack, and the means oi' applying the lever to the head or block which engages with the rackbar. These features as well as the general 'construction of the jack will now he fully. described.

Referring to the accompanying drawings, which are made a part hereof, and on which similar letters of reference indicate similar Iparts,-I `igure 1 is a side elevation of a jack embodying my said invention; Fig. 2, a central vertical section of the same on the dotted line 2.2 in Fig. 8; Fig. 3, ahorizontalsectional view looking downwardly from the dotted .line 3 3 in Figs. 1 and 2; Fig. 4, a detail view .on an enlarged scale similar to a portion of Fig. 2; Fig. 5, a horizontal sectional View on the same scale as Fig. 4, looking downwardly from the dotted line 5 5 in Figs. 2 and 4; and Fig. 6, a detail view showing thehead or block D and adjacent parts.

In said drawings, the portions marked A representthe main cylinder of the jack; B, the piston,which is hollow, and also forms the storage-cylinder for the fluid; C, the rack-bar;

D, a toothed block or head which engages with said rack-har; E, a lever for operating the same, and F a bracket-like support for the lever.

The cylinder A is mounted in a base, A, and supports the other portions of the jack. It is hollow, as shown, thus providing a receptacle for the fluid as it is drawn from the the jack and supports the upwardly-moving portions, as will be presently more fully described.

The piston B is tubular, as shown, and has a head, B', upon its upper end, which enga-ges with the load ,to be raised. It is provided at the lower end with a stuffing-box and valve. The stuing-loox is of the ordinary construction and is easily understood. rEhe valve consists of an orifice through the stunning-box, and a rod or stem, B2, passing through said orifice, having its sides flattened or grooved to permit the liquid to pass by it. Upon the upper end of the stufng-hox is a cap-nut, b2, through which arel ports leading into the storage-cylinder. Inside said cap-nut and passing through said stem is apin, b4, and between said pinand the upper end ofthe stuffing-box is arranged aspiral spring, b5, by which said stern is held up so that its lower end or head, b, is kept in contact with the lower end of the stuffing-box. rIhe operation is,when the piston B is raised during the operation of the jack, that the suction in the cylinder A will pull down and open the valve and permit a portion of the liquid contained within the storage-cylinder to pass into said cylinder A. When the upward stroke is completed and the piston B is released from the force of the lifting-lever, the spring b5 will return the valve to its former position, closing the orifice, and thus the piston is supported in raised position by the iiuid which has been drawn from the storagecylinder, and this operation is repeated continually until the load has been raised to the height desired. Directly above the stem B2 of the valve, and in contact therewith, is arranged the rod B3, which entends up to the upper end of the jack, and has a head', b', thereon. Its lower end is screw-threaded and enters the cap-nut b2, passing through said storage-cylinder in the upward movement of cap-nut, and coming in Contact with the stem B2 of the valve, as before stated. When it is desired to lower the jack, this rod is turned by means of its head b,which is housed in the head B of the piston, and thus forces the stem B2 ofthe valve down and its head out of contact with the under side of the stuffing-box, leaving a free passage-way from the cylinder A through the openings alongside the said stem and through the ports in the cap-nut into the storage-cylinder, thus permitting the return of the iiuid from said cylinder A to said storage-cylinder, and allowing the piston to descend, the block or head D having irst, of course, been removed from engagement with the rack-bar C. The head b has a setnut or projecting portion, b, and is arranged closer to one side than the other of the head B. Thus said projecting portion will pass one side of said head, but will come in contact with and be stopped by the other,whereby the movement of said head, the rod B3, and the valve, so far as operated thereby, will be limited. I

The rack-bar C is mounted upon the piston B between the head B and a collar, c, and eX- tends down alongside the main cylinder A, between the sides of the bracket-like support F, in position to engage with the head or block D.

The block or head D is toothed correspondingly to the rack-bar and engages therewith. It rests upon th inner or cam-faced end of the lever E, between the wings of the bracketlike support F. tended sides d,which surround the pivot e of the lever, and is thereby held from being re- It is provided with open eX- moved from position, and is, by reason of the large size of the openings in said sides d, perv niitted to be raised up and thrown over, so as to be out lof engagement with the rack-bar. This head has a portion which extends ou't horizontally when in position for use, and

forms a face, d', against which the cam-face of Q the lever works.

`The lever E is mounted on a pivot, @,whi'ch i extends through aud rests in inclined slots in the wings of the bracket-like support, and is provided with a cam-face which comes in contact with and operates the block lor head D.

The bracket-like support F is provided with inclined slots or openings f for the pivot e off r the lever E, similar to those 'shown and described in the aforementioned Letters Patent.

The support is provided with bandsffzf, v

any endwise movement of said support on said cylinder.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a lifting-jack, the combination. of a hollow cylinder mounted upon a base, ahollow piston, which also serves as a storagecylinder, mounted in said cylinder, said hollow piston having a rack-bar secured thereon, and said cylinder having a lever and ratchetfaced block mounted on a bracket thereon, which engages with said rack-bar, a valve in t-helower end of thehollow piston,which opens therefrom into the hollow cylinder, and a fluid within said hollow cylinders, which passes from one to the other through said valve as said jack is operated, whereby said piston can be supported in elevated position after being elevated by said lever and rack-bar, substantially as set forth.

2. The combination, in a lifting-jack, of the cylinder A, a hollow piston, B, mounted therei11,fmeans of raising said piston, and a valve in the bottom of said piston, consisting of a stem, B", passing through an opening in the stuffing-box, with a pin, b", through its upper end, and a head upon its lower end, with the main cylinder A, the combined piston and storage-cylinder B, having a valve in its lower end and a liftinghead on its upper end, a bracket-like support, F, mounted upon said cylinder A, a rack-bar, C, mounted on .the piston B, Va rack block or head, D, and a lever, E, mounted on said bracketlike support,

i lall substantially as shown and specified.

45. The combination, in alifting-jack, of two cylinders, one arranged within the other, a bracket-:like support upon the lower cylinder, the rack-bar upon the upper cylinder, a camfaced lever :mounted in said bracket-like support, and a vratchet-faced block or head engaging with said rack-bar, and .having an overhanging face,with which the cam-face of said lever may engage, whereby said cam-faced lever is yadapted to `raise said block when operated, substantiallyas show-n andspeciiied.

6. The combination, in a lifting-jack, of two cylinders, one mounted within the other, a

valve in the lower end of the inner cylinder,

a cap-nut, ports through said oaphut, and :L in Contact for limiting its movement, substau- 1o sorewrod passing through said cap -nut for tially as set forth. forcing saidvalve open, substantially as shownY In Witness whereof I have hereunto set my and speoecl. hand and seal, at Indianapolis, Indiana, this 7. The combination of the cylinder A, the 3d day of April, A. D. 1885.

hollow piston B, a valve in its lower end, a ISRAEL HOGELAND. [11. S.]

screw-rod, B3, for forcing and holding said In presence ofva-lve open, a project-ion, b, onbhe head of C. BRADFORD,

said rod, and n stop with which it; will come CHARLES L, THURBER.

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