US1121417A - Hoisting-jack. - Google Patents

Description

J. H. TANN.

HOISTING JACK.

APPLICATION FILED MAR. 5, 1914. V 1, 1 21 ,41 7. Patenmd Dec. 15,1914.

2 SHEETS-SHEET 1.

J. H. TANN.

HOISTING JACK.

APPLICATION FILED MAR. 1914.

Patented. Dec. 15, 1914.

2 SHEETS-SHEET 2.

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JAMES H. TANN, OF DAYTON, OHIO.

HorsrINe JAoK.

Specification 'of Letters Patent.

Patented 11620 15, 1914.

Application filed March 5, 1914. Serial No. 822,?15.

To all whom it may concern Be it known that I, JAMns H. TANN, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Hoisting- Jacks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in hoisting jacks, and has for its principal object to provide a jack which is? particularly adapted for use on automobiles and'similar vehicles where it is necessary at times to jack up the vehicle to enable the user to replace a wheel or perform a similar operation.

- Another object of this invention is to provide a simple and effective jack from which the handle may be easily and quickly detached, thus permitting the same to be placed in a small space and occupy a minimum amount of room in the tool chest which is usually carried by motor vehicles.

A further object of this invention is to provide a jack of the above type which may be easily and quickly placed in position and assembled for use. i

A still further object of the invention is to provide a novel means for holding the jack in the proper alinement and also providing a roller bearing which will render the operation of the trek considerably easier. 1

With the above and other objects in view, the invention consists in the novel combination and arrangement of parts which will be fully set forth in the following specifi cation and accompanying drawings, in which,

Figure 1 is a longitudinal sectional view of a jack constructed in accordance with this inventiomshowing the roller bearing and guide in place, Fig. 2 is a face view of a jack constructed in accordance with this invention showing the teeth and operating bar, Fig. 3 is a transverse sectional view of a jack constructed in accordance with this invention taken on line 7% 3 of Fig. 1, Fig. 4 is a side view in elevation showing the jack in position to be lowered, and Fig. 5 is a detail perspective view of the pawl which is carried by the operating-bar.

' Referring now to the drawings by characters of reference, the numeral 1 designates the base of the jack having formed integral therewith the channel member 2 which comprises the rear wall ii and the side walls 1 and 5 respectively. The rear wall of the channel member is provided with the ofi-set portion 6 to provide the enlarged chamber 7 at the upper extremity of the channel member. A. suitable roller 8 is rotatably mounted in the channel member as at 9 and the said roller is arranged to occupy a portion of the chamber 7 when in place. A. pair of forward extensions 10 and 11 are formed on the channel member and project in an opposite direction to the off-set portion (5 of the wall 3. The forward edges of these extensions 10 and 11 extend angular-1y as illustrated in Fig. 1 and these extensions a re provided with the connecting plate 12 which is formed integral therewith and is adapted to act as a stop for the locking pawl when the device is in use. I

Formed integral with the walls t and 5 of the channel member 2 are provided the lugs 13 and 14 respectively which are cylindrical in form and are arranged to form pivot points for the operating lever, which n ill be more fully described hereinafter. These lugs13 and 14 are arranged substantially, centrally of the longitudinal. extremities of the channel inel'nbcr as clearly shown in Fig. 2. A second set of lugs 15 and 10 are formed integral with the walls 4: and 5 res 'iectively near the free edges of said walls and are arranged to form the pivot points for the opera ting lever when the jack is to be lowered. A similar pair of lugs 17 and 18 are formed on the walls 4 and 5 in direct alincment with 'the lugs 13 and 14, but are spaced upwardly from the lugs 15 and. 16 to form stops for the operating lever and prevent the same from. becomingdisplaced when the same is in position on the lugs 15 and 16.

Having described the main body portion of the jack, the next in order is the lifting element which is designated generally by the numeral 1.9, and comprises the body portion 20 having formed at one end the curved angular extension 21 which forms a scat for the object which to be lifted. Extending longitudinally of the body portion ,520 and formed integral therewith are provided the tongues 22 and 23 which are slidable in the longitudinal groove 24.. formed in the walls 4 and of th'e' 'channel member 2. The body portion 20 of the lifting element 19 is arranged so that the rear wall thereof is spaced from the wall 3 of the channel member 2 and it will be apparent that the front wall of the body portion 20 will project slightly beyond the lateral extremities of the walls 4 and 5 of the channel member as illustrated in Figs. 1 and 4. This forward wall is provided w th the chamfered edges and 26 as shown in Fig. 3 A plurality of serrations 27 are formed-in the chamfered edge of the lifting and 14: and place and 16. The chain is then attached to the the pawl 29. When it is desired to lower.

the jack, the only operation necessary is to remove the handle plortion from the lugs 13 t e same on the lugs 15 lug 33 by means of the loop 43 and upon exerting pull on the chain, it will be apparent that the pawl 29 will be released from its position between the teeth in which it is in engagement and the jack will be perelement .19 and are arranged to form the. teeth 281which coiiperate with the pawls in' holding the lifting element'in the desired position.

1A pawl 29 is provided and is adapted to engage the teeth 28 on the lifting member 19 and hold the lifting member in the desired position. This pawl is provided with the pivot shaft 30 which pro ects through apertures 31 formed in the angular extensions 10 and 11. Oneend of the shaft 30 is bent as at 32 and provided with the weight 33 which is arranged, to hold the pawl normally in engagem'ent with. the teeth on thefliftin member 19; LAD angular. extension 33 is ormed ally mounted,

larged bifurcated portion 36. Thisenlargedportion 36is provided with the bifurcated extension 37 in which the pawl 38 is pivot- A transverse shaft 39 extends through apertures in the bifurcated portion, and is arranged to hold the pawl in the proper relation as shown in Fig. 1. The

end of the bifurcated portion terminates in the hook members 40 which is arranged to engage the lugs 13 and 14: when the device 1s in use. A suitable chain 41 is secured to the enlar ed 'ortion 36 as at 42 and is rovided g I; P

with the 00p 43 which is arranged to engage the lug 33 to release the pawl 29 and permit the lifting member 19 to descend.

mitted to descend.

From the foregoing, it will be evident that a simple and edective jack is constructed which will occupy a minimum amount of space and is capable of lifting great loads since the leverage of the handle memberis sulhcient to force the load upwardly. Owingto the fact that the handle member is long and detachable from the body portion, it is evident that the same will occupy the least possible amount of space in a tool chest of)- similar device which may be carried a o ut, and for that reason the device provided is-capable of-being used for "various purposes. a I

It is to be understood that the jack may be lowered in the manner in which it.is-

raised by manually releasing the pawls, and

I hile in the foregoingwthere has been shown and described the preferred embodiment of this invention, it isto beunderstood that such changes may be made in the combination. and arrangement of parts as willfall within the spirit and scope of the invention as claimed.

the use of a chain in this instance is unneces- Having thus described my invention, I

claim:

A deviceof the character described comprising a base plate, a channel member secured to the base plate and extending upwardly therefrom, said channel member being provided with a longitudinal groove in each of its side walls, a weight actuated pivoted pawl carried by the channel member, a

pair of lugs extending laterally from the It will be evident from the foregoing that in use, the device is assembled by p cing relation to the teeth 28. Owing to the weight 32 which normally holds the pawl 29- in engagement with the teeth 28, itwill be evident that when the free end of the handle portion 34:. is raised, the lifting member 19 will be forced upwardly and in traveling in that direction the pawl 29will engage the teeth, and as soon as the lift on the handle is released, the lifting member 19 will desce'nd and be held in position by means of I the hook members 40 over the lugs 13 and 14 which will bring the pawl 38 in proper channel member on each side and arranged substantially central of its longitudinal extremitles, a second pair of lugs near the up per extremity of the channel member and projecting laterally from the side walls thereof, said second pair of lugs being near the free edges of the. side walls of the chan-' nel member, a lever adapted to engage the lugs on the channel member and thereby be pivotally secured thereto, a pawl carried by the lever a hoisting element slidable in the channel member, said hoisting element being rovided with a plurality of teeth on one face, the pawl carried by the channel memher being adapted to engage the teeth and hold the hoisting member in adjusted position, and the pawl carried by the lever being adapted to engage the teeth to raise the hoisting member, and. a chain secured to the lever and adapted to-en age the pawl car- Filed. by the channel mem er When the levef is pivoted on the second set of lugs to release the pawl and permit the hoisting element to drop.

In testimony Wheieoi I afiix my signatufe in presence of two Witnesses.

JAMES H. TANN. Witnesses:

SOLOMON JOHNSON, WADE J. BUYDDON.

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