US912675A - Jack-screw. - Google Patents

Description

J. H. e J. w. HARTLBY. JACK SCREW. APPLICATION FIIBDPR. Z9, 1908.

912,675. Patented Feb. 16, 19o9. l

Summa/tow.' 'wie Mwooea:

UNITED STATES PATENT OFFTC.

JOHN H. HARTLEY AND JAMES W. HARTLEY, OF BROYLES, COLORADO.

JACK-SCREW.

To all whom it may concern:

Be it known that we, JOHN H. HARTLEY and JAMES W. HARTLEY, citizens of the United States, residing at Broyles, in the county of Conejos and State of Colorado, have invented certain new and useful Improvements in Jack-Screws, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a ack screw and attachments therefor and has particular reference to certain improvements in jack screws whereby the same are susceptible of a variety of different uses.

The invention includes such a device which is adaptable to all the ordinary uses of a lifting jack having in addition thereto provision whereby the device may as well be used as a convenient and effective means for binding loads of timber, lumber or other freight. To this end the invention includes two members longitudinally adjustable relative to one another through the medium of a screw-threaded connection, with an engaging means upon each of said members adapted to be engaged by a chain or the like, when the device is used for binding purposes, the said means being adjustable, whereby when the device is used as the ordinary lifting jack, the said engaging means will be removed from operative position, leaving the top and base of the device flat and unobstructed.

The details in construction and arrangement of parts permitting the above and other results, will 'be more readily understood by referring to the accompanying drawings which form a part hereof, and wherein a preferred embodiment of the invention is disclosed for the purpose of illustration, which said drawings should be read in connection with the description following.

' Figure l of the drawings is an elevation of the device complete, showing the engaging means for binding purposes in operative position. Fig. 2 is a similar view disclosing the engaging means in folded position, whereby the device is in condition for lifting purposes. Fig. 3 is a detail view of the base of the pedestal, the same being shown in section, for the purpose of illustrating the connection between the engaging means and said base, and Figs. 4, 5 and 6 are detail views of the parts detached.

Again referring to the drawings wherein Specification of Letters Patent.

Application filed April 29, 1908.

Patented Feb. 16, 1909.

Serial No. 429,832.

similar reference characters refer to corresponding parts in the several vie\ s, A is the body of the device, preferably hollow and of metallic formation and having an enlarged conical shaped extension a also preferably hollow constituting a suitable base portion. rlhe interior wall of the body portion A is preferably screw-threaded at a and is adapted to receive a stem portion Z) having threads Z/ arranged complementary to the threads a. The said extension Z) is preferably an integral part of a member B, enlarged relative to the extension and having an aperture c extending transversely therethrough in which is slidably mounted an operating lever C. This operating lever has suitable knobs or enlarged portions at its respective ends thereby preventing its removal from the member B, it being noted that the operating lever is free to slide from end to end through said aperture c.

D is a top or head piece rotatably mounted upon the member B, in any desired manner, but preferably the same is hollow and conical shaped, the lower end being sleeved upon an upward extension of the member B, and having means for preventing the separation thereof. The upper edge of the conical head piece is preferably serrated in any usual manner.

From the description thus far, it will be seen that the device has all the essential qualifications of the ack screw or lifting jack, the member B and head D carried thereb 7 beine` ada )ted to raise or lower according to the direction of the movement iinparted by the lever C.

ln order to adapt the device for binding purposes for instance, engaging means are provided, one upon the head piece D and the other upon the base of the body portion. These means comprise suitable hook members E and F secured respectively te the cap plate or head piece and to the body portion. Extending transversely of the conical shaped base and head piece are suitable pintles c and adapted to receive and support suitable eye portions e and f en the hooks. In normal position, that is when the hooks are to be used for binding purposes they extend beyond the top and bottom of the jack proper, but since it is desired, as above stated, to utilize the device as a lifting device, per se, it becomes necessary to move the hooks E and F in order that they will not constitute projections beyond the top and bottom of the jack. To this end the hooks are loosely sleeved upon the pintles e and f and the walls of the base and head piece have a longitudinal slot, c2 in one and f2 in the other, which said slotted portions constitute receiving seats for the hooks when folded from a. position longitudinally of the j ack to a position transversely thereof. The securing means for the hooks as well as the receiving slots are so constructed and arranged that when the hooks are in folded position, no part of the securing' means or hooks extends beyond the upper surface of the head piece or below the base of the body portion.

Tie invention is an important and convenient one for the teamster. lhen it is desired to utilize the device for binding loads of timber, frame work etc., a chain is passed around the load, and attached at its respective ends to the hooks E and F respectively, the hand lever C having been previously operated to extend or separate the members A and l ln this way, the chain is tightened about the load by operating the lever C to bring the parts A and B to closed position. Additional aperti. es may be provided in the member C, at c for the reception of the end of a crow bar, for instance to be used as a lever for heavy lifting' purposes.

What. we claim is:

1. ln a device of the character described, the combination of an elongated hollow base member, a supporting member having a depending portion threaded into the base member whereby the parts may have a relative longitudinal adjustment, an upward extension on said supporting' member, and a head member loosely mounted upon said upward extension whereby the head may rotate about the longitudinal axis of said extension, a hook member, and means for mounting it on said rotatable head whereby it offers no obstruction beyond the upper surface of the head.

2. ln a device of the character described, the combination of an elongated hollow base member, a supporting member having a depending portion threaded into the base member whereby the parts may have a relative longitudinal adjustment, an upward extension on said supporting member, and a head member loosely mounted upon said upward extension whereby the head may rotate about the longitudinal axis of the said extension after the parts have been adjusted longitudinally, complementary hool members, one for the head and base, means for mounting` one hook to the head whereby it may swing from a position substantiallyv in line with the longitudinal axis of the head to a position at right angles thereto, whereby it will offer no obstruction beyond the upper surface of the head and means for connecting the other hook member to the base whereby itmay swing from a position in line with the longitudinal axis of the base to a position at right angles thereto whereby it will offer no obstruction beyond the lower surface of the base.

3. ln a device of the character described, the combination of a base having a flat bearing surface, a head piece having a fiat bearing surface, a longitudinal adjustable connection between the head and' base, and independent means for permitting relative rotatable adjustment, the head and base having a longitudinal slotted portion, a pair of hooks, means for pivotally securing one of said hooks within the slot of the base whereby it may project without the slot without offering any protuberance below the flat surface of the base, means for securing the other hook within the slot of the head whereby it may project without the slot wi `hout offering any protuberance above the tlat surface of the head.

4.-. A screw jack comprising a base, and a head piece, a connecting member between the head and base permitting relative longitudinal and independent rotatable adjustment between the head and base, and pivoted hook members carried by the head and base.

5. 1n a device of the character described, the combination of a base member, a head member adjustable on said base member and having a hollow terminal, the head member also having a longitudinal slot in its side connecting with the hollow terminal thereof, a transversely extending pin within the head, and a hook member normally projecting without said slotted portion of the head and havin T a pivotal connection with said transversely extending pin, whereby the hook normally occupies a position below the upper surface of the head, and may be adjusted to position in substantial longitudinal alinement with the head.

6. In a device of the character described, the combination of a base member, a supporting member longitudinally adjustable thereon, a flat surfaced head member rotatably adjustable on said supporting member and having a hollow terminal, the head member having a longitudinal slot in its sine connecting with the hollow terminal of the head, a transversely extending pin within the head, and a hook member normally projecting without said slotted portion of the head having a pivotal connection with said transversely extending pin, whereby the hool; normally occupies a position below the flat upper surface of the head.

1n testimony whereof we affix our signatures in presence of two witnesses.

JOHN H. HARTLEY. J AMES WV. HARTLEY. Vitnesses:

J. D. FRAZEY, A. R. LUNEL.

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