US1295358A - Combined lifting-jack and hoist. - Google Patents

Description

J. P. NIKONOW.

COMBINED LIFTING JACK AND HOIST.

APPLICATION FILED SEPT. 22. 191 7.

Patented Feb. 25, 1919.

JOHN P. uIKouow,

OF DAYTON, OHIO.

COMBINED LIFTING-JLACK AND HOIST.

Specification of Letters Patent.

Application filed September 22, 1917. Serial No. 192,813.

To all whom it may concern Be it known that I, JOHN P. Nmouow, a citizen of Russia, and a resident of the city of Dayton, in the county of Montgomery and State of Ohio, have'invented a new and useful Improvement in Combined Lifting-Jacks and Hoists, of which the following is a specification.

My invention relates to the lifting jacks and hoists combined and has particular reference to the portable, hand or power operated mechanisms, suitable for carrying in automobiles, trucks and the like.

My invention has for its object to provide a mechanism of the character, above indicated, which is simple in form and efiicient in operation, the same apparatus being suitable for raising the load above the ground by jacking it up, for moving the load horizontally and for hoisting it by means of a rope or chain.

There have been employed heretofore, sepa- I rate apparatus for each of the above mentioned operations, lifting jacks being of such construction, as to render them unsuitable for hoisting work.

I have produced a mechanism which utilizes features of ordinary lifting jacks, and, in addition, has parts,- which in combination with the aforesaid features, enable the mech anism to be used as a hoist, winch or capstan.

In the accompanying drawings, Figure 1, is a plan view of my mechanism, when used as a lifting jack. Fig. 2 is an elevation. Fig. 3, shows the same mechanism with additional parts, used as a hoist. Fig. '4: shows the handle with the attachment to change direction of lift.

The mechanism comprises a stem or movable rack 1 with ratchet teeth 2 and threaded portion 38. This stem has an enlarged portion or jackhead 3, adapted to engage the load, such as an axle of the vehicle, when raising same from the ground.

The stem 1 slides in the stand lwith the foot 5, which is sufiiciently large to provide a safe resting base, when the mechanism is used as a jack.

A handle 6 is pivotally- (pivot 6*) connected to the stand 4. The pawl 7 is connected to the handle on a pivot 8. Another pawl 9 is attached by means of a pivot 10 to the stand 4 and prevents the rack from slipping down, when the handle is released. -An arm 11 is mounted on a pivot 12 and has a slot 13, in which slides a pin 14, fastened to the pawl 9. Spring 15 tends to move the arm 11 toward the pawl 9, pressing it against the rack. The extension 16 fits in the slot'17 in the handle 6, when the latter is lowered.

y Patented Feb. 25, 1919.

Another arm 18 on a pivot 19 engages" the paWl 7 by means of two flat springs 20, sliding on the pin 21. Spring 22 tends to press the .pawl 7 against the ratchet 2 through action of the arm 18 andsprings 20. The projection 23 enters freely slot 24 in the handle 6, when the latter is raised.

When the jack is used for lowering the load, the sleeve 25 is shifted toward the pivot on the handle'by means of shifting rod 37 thus closing the slots 17 and 24. As

a result, when the handle is raised, sleeve 25 strikes the arm 18 and causes disengagement of the pawl 7 and rack 1. With the handle lowered, the pawl 7 engages the rack again. With the further downward movementthe sleeve 25 strikes the link 11 and disengages the arm 9 from the rack 2,

thus enabling the rack to be lowered by-one' tooth. It is easy to see, that both pawls cannot be disengaged at the same time, so that when load is not held with the acting pawl 7, it will be suspended on the safety pawl 9.

The cars 26 are provided on the stand, so. that it can be suspended on the rope or a similar carrier 27 with a. hook 28 when it is desired to use the jack as a hoist. A rod 29 is screwed then in the threaded portion 38 of the rack 1. This rod has anenlarged portion with automatic clamps 31 on pivots and with springs 33. These clamps allow the rope or suitable carrier. 31 to pass freely in one direction and hold it firmly, when direction of the pull is reversed. Similar clamps 35 are attached to the stand 4.

\Vith the load on the end of the rope 34, the jack may be operated in the ordinary way for lifting, the pull of the load causing the clamps 31 to grip the rope. rack 1 is raised itsfull travel, the slack part of the rope is pulled through the clamps 35, and the rack'is lowered down, the clamps 35 gripping the rope and the clamps 31 automatically releasing it. The whole m echa. nism is ready then for another lift. Therefore, the clamps 35 and 31 hold the load alternatively.

In order to facilitate the clam ing of the rope, it may be provided with t e cord or wire bands 36, as shown on Fig. 3.

When the rack bar.

Import-ant advantages of the mechanism above described are, that it can raise or lower considerable weights with small movements of the operating handle, can be operated with one hand only, changed from lowering to lifting and vice versa being accom )lished from the end of the handle, and that 1t am also be used as a hoist, for instance, when it is necessary to pull the vehicle from a mud hole.

I claim as my invention:

1. In a jack, the combination, with a stand and a rack bar passin through said stand andhaving a jack heac, of a. retaining pawl carried by said stand for engagement with said rack bar, an operating handle pivoted on said stand, and an operating pawl pivoted to said handle and acting on said rack bar, a sleeve surrounding a portion of said handle, and means for sliding said sleeve along said handle, with connections whereby said sliding movement-of said sleeve reverses the direction of movement of said :2. In a jack, the combination, Witha stand and a rack bar passing through said stand, of a retaining pawl carried by said stand and engaging said rack bar, an operating handle pivoted on said stand, an operating pawl carried by said handle, and engaging said rack bar, arms pivoted to said stand and having'sliding connections with said operating and said retaining pawls, respectively,

and a sleeve slidably carried by said handle,;, the construction being such that the sleeve when in one position Wlll cause alternate 0pon said stand and the operatingpawl on said handle, arms pivoted on said stand and having sliding connections with the operating and the retaining pawls, respectively, springs tending to engage both said pawls with said rack bar, and a sleeve carried slidably on said handle, constructed when in' one position'to release said pawls. alternately and move them against the tension of said springs to Withdraw said pawls alternately from said rack bar. I

In testimony whereof I have hereunto subscribed my name this fifteenth day of September, 1917.

I JOHN P. NIKONOW.

' Witnesses:

H. N. RIEHLE, H. J. LINKERT. 7

Copies of this patent may be obtained for five cents each, by addressing the fcommissioner of Patents,

Washington, D. 0.

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