US802570A - Wheel-jack. - Google Patents

Description

3111112115112, fr, J K) PATENTED OCT. 24, 1905. J. H. JONES.

WHEEL IAGK.

APPLICATION FILED SEPT. 8.1904,.

: rrnn STATES;

PATENT oFFIeE.

JQSEPH HENRY JONES, OF SCOTLAND, CANADA, ASSIGNUR OF ONE-HALF TO ORLO J UDSON BENEDICT, OF MOUNT VERNON, ONTARIO, CANADA.

WHEEL-JACK.-

Specification of Letters Patent.

Patented Oct. 24, 1905.

Application filed September 8, 1904. Serial No. 223,697.

To (ti/Z whom it may concern.-

Be it known that I, J osErH HENRY JONES, a citizen of the Dominion of Canada, residing in the village of Scotland, in the county of Brant, in the Province of Ontario, Dominion of Canada, have invented a certain new and useful Improvement in VVheel-Jacks; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same.

The invention relates to an improved vehicle or wheel jack which will be simple but handy and powerful and will extend from seventeen to twenty-seven inches and make a three-inch lift no matter what height the vehicle, and the leverage remains the same in every case. It can be easily operated with one hand and automatically locks itself when the lifting-bar is elevated.

The invention consists in an open base box frame,two grooved uprightstandards, secured to the base box frame, provided with a series of notches cut in the front edges of said standards, the latter clamped together at the top. A lifting-bar is made to slide vertically between the standards, a pitman-rod is pivoted to the standards and to the link-plate at the lower end, which in turn is pivoted to a lifting-lever. A fulcrum-pin is passed through the inner end of the lifting-lever and linkplate and has its bearing in a corresponding notch in the side of the bed-piece, where it rests at its lowest point, and also in a series of notches in the upright standards where the lifting-bar is to be raised higher. I attain these objects by the mechanism illustrated in the accompany drawings, in which Figure l is a side view of a wheel-jack embodying my invention. Fig. 2 is a rear end view of the same, showing the sides of the box in section and the end broken away. Fig. 3 is a side view of lifting-lever standard and connections, detached from the box base frame. Fig. 4: is an end view of the same. Fig. 5 is an inside view of one of the vertical standards, showing a groove for pins on the lifting-bar to slide in. Fig. 6 is a side view of the jack, showing the lifting-lever down and the lifting-bar up. Fig. 7 is an end elevation of liftingbar detached.

In the drawings, A represents a box bedframe, one by three inches, bolted together through end pieces a by bolts 7) b.

B B are two upright standards mortised into and secured to the bed-frame. Each has a vertical groove 0 formed on its inner side, as shown at Fig. 5, the object of which will be shownhereinafter. The said standards B are connected together and held, fast at the top by a metal cross-plate (Z, through which pass two bolts (1 e and also through a front cross-piece f, as well as the two standards. This means holds the two said side standards firmly together. A series of half-circular notches g are cut in the front of the side standards B. in any pair of which the fulcrum-pin of. the lifting-lever will rest during the operation of the device.

C is the lifting-bar proper, consisting of a square-shaped piece of hard wood made to slide vertically betweenthe two standards B I3. It has a projecting pin 71,- on each side, which slide in the grooves c a cut in the inside of the standards B B, andthe upper end is held between the said standards by the cross-pieces (Z and f, attached to the extreme top of the standards. The lower half of the said liftingbar 0 has a vertical notch 2' cut in it to the bottom, in which is pivoted, by means of a pivot-pin 7', an oscillating pitman-rod It, the lower end of which is pivoted (by a pivot-pin Z) to a metal link-plate m, which enters a slot 12 in the pitman-rod. The opposite end of the said link-plate m passes through a slot in the lifting-lever 0 and is securely fastened thereto by four screws, bolts, or rivets p 2) p p.

Q is a fulcrum-pin made to pass through the lifting-lever 0 and is made to rest in any of the notches g in the base-frame A or stand.- ard B B.

Attached to the rear part of the pitman 7:; is a locking-plate a, secured thereto by a bolt 8 and nut t. The said locking-plate r when in a horizontal position has its ends extending over in contact with the lifting-bar and locks the pitman and lifting-bar when up and the lifting-lever down, as seen in Fig. 6.

The operation of the device may be described as follows: Its normal position when not in use will appear as in Fig. 1, the lifting-lever 0 being vertical and its fulcrum-pin Q, at rest in the lowest fulcrum-notch g in the baseframe A. After the machine is placed under the axle of a wheel to raise it the lifting-lever 0 is depressed as far down as it will go. That movement raises the lifting-bar C about three inches, which will be the height the wheel of a vehicle will be elevated above the ground when the lifting-lever 0 is down to its lowest position, as seen at Fig. 6. The locking-block 1* comes in contact with the rear walls of the lifting-bar O, as in Fig. 3, the bottom of the pitman being forward, when the said liftingbar O cannot come down, but is retained and locked until the lever 0 is elevated. It will thus be seen that the lifting-bar O is capable of sustaining a Weight of about one thousand pounds. When the lifting-bar O requires to be elevated more than three inches, the fulcrum-pin Q of the operating-lever 0 is lifted out of the notch in the bed-frame A and placed in any of the notches g in the face of the standards B 13, according to the height desired to operate the jack.

The entire device Weighs only seven pounds and is capable of lifting one thousand pounds when the fulcrum is in any one notch g. The lever being shortand its fulcrum close to the ground, it can be operated under a wagon-box,

- rack, or other equipment Without obstruction.

All the strain is endwise on the pieces of wood in its construction, and therefore capable of great sustaining power though of very slight formation.

The device can be made of wood or metal or a combination of both.

Having thus described my device and its advantages, what I claim as my invention, and desire to secure by Letters Patent, is

A wheel-jack consisting of a rectangular bed-frame, two slotted standards having their lower ends firmly secured to the said bedframe and their tops secured with cross-bars, a slotted lifting-bar made to slide vertically between said standards, projecting pins attached to the said lifting-bar and made to slide in grooves in the standards to keep the liftingbar vertical, a pitman pivoted at its upper end to the lifting-bar, in its slot, the lower end of the said pitman pivoted to a link-plate secured to a lifting-lever, said lifting-lever provided with a fulcrum-pin to engage with a series of corresponding notches in the baseframe and standards, and a locking-plate secured to the rear side of the pitman to impinge on the lifting-bar to lock the same, all constructed substantially as and for the purpose specified.

Dated at Hamilton, Ontario, this 4th day of August, 1904.

JOSEPH HENRY JONES.

In presence of O. J. BENEDICT, W'M. BRUCE.

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