US1333966A - Lifting-jack - Google Patents

Description

W. B. FAY..

LIFTING JACK.

APPLICATION FILED APR-3, I9I9.

0 1 w W Y H m w 6 .Y A w@ a m MM v n M m@ A m w m B h w m." M E UNITED sr rns PATENT orrion WILLIABI BROWN FAY, CHIOOPEE FALLS, MASSACHUSETTS, ASSIGNCR FAY MANUFACTURING CGRPORATIGN, NEW YORK,

DELAWARE.

1 '0 all whom it may concern.-

Be it known that'l, illman BROWN FAY, a citizen of the United States, and resident of Chicopee Falls, county of Hampden, and State of TBTHSSROliUSQttS, have invented certain new and useful Improvements in Lifting-Jacks, of which the following is a specification.

. This invention relates to lifting-jacks of the character adapted especially for compressing the spring of a puppet-valve of an automobile motor when it is desired to release the valve from its seat for purposes of fitting and grinding.

The principal objectof the invention is to provide a compact, readily operable device of the character named which may be successfully operated within the small space between the motor cylinders and the crank case of an automobile, and which is simple in construction, durable, inexpensive and possessed of considerable lifting power.

The device com rises a forked lifting-rod, a forked base-rod, rocking means for connecting said rods and means for locking them in fixed relative arrangement, all as hereinafter fully described and specifically set forth in the annexed claims.

In the accompanying drawings forming part of this specification, Figure 1 is a side view of my improved jack showing the same in operative position and correlation with a puppet-valve stem. Fig. 2 is a plan view. F 3 is cross sectional view taken on the line 33 of Fig. 1; and Fig. 4 is an end view ofa clamping link for locking the arms of the device to ether.

' In the example or my invention illus trated by the drawings, A, indicates a lifting-rod embodying the and forked inner end part 1 and the el0ngated handle-extension 2; and B, indicates a base-rod embodying a similar forked part 3 and an elongated handle-extension 4. Said rods A and B, are hinged together at a point near their forked parts by means of a rock-link comprising a segmental plate C, which engages oppositely located recesses a and b of the rods A and B, and is secured by means of the fixed pins 0 and (Z. It is noteworthy that the hole 6, through which the pin d passes, is of larger diameter than the pin, which allows for slight backward or forward movement of the lifting rod to Specification of Letters Patent.

attened, tapered N. Y., A Cors can-non or Lrrrine-Jnox.

Patented Mar. 16, 1920.

Application filed April 3, 1919. Serial No. 287,350.

obviate liability of having the crotch of the fork jam against the piippet mlve stein when the device is being operated. is a means for locking the extensions and l, of the rods A and B together, for maintaing the forked parts in spread condition illustrated by full lines Fig. l of the drawings, I employ a double link-D, which is in pivotal relation withthe free end of the extension 4:, of the rod B, and embodies the two link-sections f and 9. When the forks 1 and 3 are spread apart to their fullest extent as shown by Fig. l of the drawings the section 7', is swung over the lug 72, of the extension 2; and when it'is de-- sired to lock the parts in an intermediate position the section 9, is used in like manner.

The rods, A and B and the rock-link C, are composed of steel, preferably drop for ed, whereby I provide a very strong and durable device adapted to be manually operated for lifting various articles or parts of any mechanism which may require lifting.

In the operation, and use of the device the fork 3 isplaced in contact with and caused to bear upon a suitable base, as thescrew-head 5 of the screw 6, forming part of an ordinary puppet-valve operating mechanism, not necessary to herein show or describe as it will be well understood by those familiar with the art of motor construction and forms no part of my invention. The free ends of the rods i land 13 are then moved toward each other by forcing he handle-extension 2 downwardly until the moveu'ient causes the fork 1' to contact with and lift the object to be lifted, as the washer 7, surrounding the valve stem 8 and bearing against the coil spring 9, which is located between said washer and the puppet-head 10. The handle parts of the rods are then clamped together by means of the link D, and the forks are maintained in spread relation admitting of easy removal of the key 11, whereby the valve stem and its connected valve may be readily removed, the jack remaining in position for any re quired time, or until the valve, stem and key are replaced when it is simply necessary to swing the link D, downwardly and allow the spring 9, to exert its pressure on the washer 7. 'The same'operation may be employed for lifting any mechanism or parts of mech' anism or any object which it may be desirable to lift and maintain in lifted position for an arbitrarily selected time.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is: V

l. A lifting-jack comprising a lifting-rod embodying a tapered and forked part and a handle-part, and havin a recess in its lower side, and a base-rod embodying a tapered and forkedpart and a handle-part, and having a recess in its upper side; and a rock link in pivotal conn ction within said recesses and connecting said rods whereby they may have swinging and forward and backward movement."

2. In a lifting-jack, the combination of a forked and handled liftinga od, and a forked and handled base-rod, and pivotineans connecting said rods whereby their forked parts may be spread; with clamping means for locking the handle parts together nesaees when the forked parts are in spread condition. I

3. In a liftingjack, the combination, of a lifting-rod embodying a tapered and forked part and a handle-part, and having a recess in its lower side; and a base-rod embodying a tapered and forked part and a handlepart, and ha ing a recess in its upper side, and a rock-link in engagement with said recesses and held by means or two fixed pins, whereby the rods may have swinging and forward and backward movement; with clamping means for locking the said handleparts together, said clamping means cinbodying a double link.

In testimony that, I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this 19th day of B Iarch, 1919.

WILLIAM BROWN FAY. Witnesses:

S. G. CONKLING, A. LENALm.

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