US1229833A - Jack. - Google Patents

Description

P. WAGNER.

IACK.

APPLICATION FILED lune 6.1915,

Lggl Pawntedme 12, A917.

PAUL WAGNER, OF SACO, MONTANA.

JACK.

maaar-se.

Specification of Letters Patent.

llatented June i2, 131'?.

AppIicaton filed June 6, 1916. Serial No. 101,973.

To all whom t may concern:

Be it known that I, PAUL lVAoNnn, a citizen of the United States, residing at Saco, in the county of Phillips and .State of Montana, have invented new and useful improvements in Jacks, of which the following is a specification.

This invention relates to a lifting jack and more particularly to that type of jack which is provided with mechanism for raising the load carrying bar step by step.

The primary object of the invention 1s to provide a lifting jack of this character which is constructed in such a manner'as to render the same capable of withstanding considerable strain when in use.

Another object of the invention is to provide a jack in which. the load carrying bar is received in a collar pivotally connected with a. link having a cam-face and connected with the load carrying bar raising mechanism in such a manner that when said mechanism is operated the cam-face on the link will be brought into engagement with the load carrying bar and co-aet with the collar in forming a clutch by means of which the load carrying bar may be raisedstep by step.

lVith these and other objects in view, the invention resides in the novel combination and arrangement of parts, which will be hereinafter described and particularly pointed out in the claim.

The preferred embodiment of the invention has been illustrated in the accompanying drawing, although no restriction is necessarily made to the precise details 'of construction therein shown, as changes, al-

terations, and modifications within the scope of the claim may be resorted toy when desired.

Like characters of reference denote corresponding parts throughout the several views in the drawing, in which:

Figure 1 is a side elevation partly in section of a jack constructed in accordance with the invention and showing the load carrying bar raised one step.

Fig. 2 is a verticallongitudinal sectional view through the jack showing the lever included in the load carrying bar raising mechanism in a position in which the clutch associated with said mechanism is released from engagement with the load carrying bar.

Fig. 3 is a transverse sectional view on the line 3 3 of Fig. 1,

Fig. t is a detail view of the clutch associated with the load carrying bar raising mechanism disconnected from the jack.

Referring now to the drawing in detail7 the numeral 1 designates an elongated and rectangular shape base which may be formed from any suitable material, said'base having connected therewith between its ends a support 2, forked as at 3, to provide spaced parallel arms 4L.

The base is provided, adjacent the support 2 with a transversely extending opening 5, while each arm l has formed therein a row of spaced and transversely extending openings 6K Secured to the base 1 and support 2 is an L-shaped bracket 7 which assists in connecting the support 2 with the base 1 and serves as a brace therefor.

A plate S extends longitudinally of the support 2 for a portion of its length and is provided with an arm 9 arranged at rightangles to the vplate and connected with the base 1 to enable the plate to assist in connecting the support to the base and serving as a brace for the support, said arm having formed therein an opening 10 registering with the opening 5 in the base.

The other end of the plate 3 has formed thereon a short arm 11 arranged at rightangles to the plate and in spaced relation with the arm 9, said arm being provided with an opening A12 alining with the opening 10 in the arm 9 and ena-bling` the arm to serve as a guidefor a lead carrying bar hereinafter described.

A bracket 13 extends at right-angles to the arms 4 and has foi-ined thereon at one end a head 14e alinng with the arm 11 and l provided with an opening` 15 registering with the opening 12 in said arm.

The other end of the bracket 13 is forked to provide arms 1G cach of which is bent to provide a portion lying at a right-angle to the head 1li, said arms beingeonnect-edwith the arms at by bolts 1'? to enable the bracket 13 to serve as a brace for the free ends of said arms.

A load carrying bar 13 passes through the openings in the head 1+i and arm 11 and has one end thereof received in the opening 5 in the base, the other end of the load carrying bar which extends above the opening 15 is forked to form a head 19.

A collar 2O loosely encireles the load carrying bar above the head 11i on the bracket 13, said collar being provided with laterally extending arm 2l terminating at its tree end in ay tapered gripping linger LL adapted for contact with the upper tace ot the bracket 13, so that the collar 20 and arm Q1 are normally held in an inclined position with relation to the bracket 13 to enable the collar to serve as a detent tor the load carrying bar 1S.

A itulcrum rod 23 extends transversely between the arms -land is removably held in the openings b' by means ot nuts 94;.

rThe 'tulcrmn rod .23 passes through an opening near one end ot an operating lever 25 to which is pivotally connected, as at 2G, a pair oit links 27.

A collar 29 is arranged between the head 1-2 and arm 11 to have passed therethrough the load carrying bar 1S, said collar being split to form spaced arms Q9 with which is pivotally connected one end oit an arcuate shaped link 30 received between said arms and having its other end pivotally connected, as at 31, between the links 27 connected 'with the operating lever One side edge ot the link i3() provides the link with a` cam-tace 32 having 'formed thereon tor the greater portion oit its length teeth 38 which are adapted to be brought into contact with the load carrying bar 1S when the operating lever 25 is turned about its pivotal connection with the arms l to tightly wedge the load carrying bar between the link and collar, so that the link and collar may co-act in t'ornling a clutch by means of which the loa d carrying bar may be raised.

By pivotally connecting the link 30 with the collar 28 and providing the link with the cam-tace 32, it will be seen that when a load is placed on the load carrying bar 18 any tendency oi the load carrying bar to move downwardly through the collar Q8 will cause the teeth 33 on the cam-tace 32 to more tightly bind against the load carrying bar 1S.

then it is desired to use the jack, the 0perating lever Q5 is raised until the collar 28 is brought into contact with the arm 11 which enables the links 27 to move the link 30 to a position in which the teeth 33 on the link 30 will be out oit engagement with the load carrying bar 1S.

lith the lever still raised, the collar Q0 is manually raised to a horizontal position at which time the load carrying bar will. be tree to slide through the openings in the heads 11 and l-land also the collar Q8 until one end ot' the load carrying bar strikes the bottom of the opening 5 at which time the load carrying bar will be in its normal and lowered position.

The jack may now be positioned beside the weight to bc li'lted and the weight positioned on the head ot' the load carrying bar 1S.

Y The operator of the jack now starts to lower the operating lever 25, such movement causing the links 27 to turn the link 30 about its pivotal connection with the arms 29 on the collar 28 and tightly wedge the load carrying bar between the teeth 30 and the collar Q8.

As the operating lever i5 turns about its pivotal connection with the arms il, the load carrying bar 18 is moved vertically upward by the collar and link 30, such movement amusing the arm 21 to assume the position in which the load carrying bar 18 is freely movable through the collar 20.

llVhen the tree end ot the operator lever 25 reaches its limit ot downward movement, the weight ot the collar 2O causes the collar and arm 21 to assume an inclined position with relation to the bracket 13, so that when the operating lever is again turned about its pivotal connection to cause the collar 2S to contact with the arm 1.1, downward movement ol the load carrying bar will be prevented.

The above described movement ot the operating handle is continued until the load on the load carrying bar has been moved a suitlicicnt distance :trom the ground. y

From the foregoing description, taken in connection with the accompanying drawing, it is at once apparent that a jack has been provided in which the-load carrying bar operating mechanism has been provided with a collar and a link so connected with each other and with the mechanism tor operating the load carrying bar that they provide a clutch which will firmly and quickly grip the load carrying bar to enable the same to be raised step by step when said mechanism is operated.

Having thus described the invention, what is claimed as new, is:

In a device ot the class described,a base having an openingy therein, a bracket on said base, a standard on the base having connection with said bracket and braced thereby, a plate on said standard having an arm connected with the base and provided with an opening registering with the opening in the base, a second arm on said plate overlying the irst mentioned arm and having an opening therein registering with the opening in the first mentioned arm and base, a lifting bar passing through the openings in said arms and to extend within the opening in the base, and means for operating said lifting bar.

ln testimony whereol2 l affix my signature.

-PUL WAGNER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

y Washington, ID. C.

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