US1501719A - Emergency jack - Google Patents

Description

July 15 1924.

E. J..OXFORD ET AL` EMERGENCY JACK Filed oct. 17, 19g

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Patented July l5, 1.924. f" n UNITED sTATEs PATENT oFFlcE.:

EDWIN J. oxEoED AND JAMES PETE, or CHAMBERS, NEBRASKA.

EMERGENCY JACK.

Application led October 17, 1922. Serial No. 595,089.

To (LZ whom t may Concern Be it known that we, EDWIN J OxFoED and JAMES PETE, citizens ofthe United States, residing at Chambers, in the county of Holt and State of Nebraska, have invented certain new and useful Improvements in an Emergency Jack; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable otheis skilled in the art to which it appertains to make and use the same.

This invention relates to a jack.

One object is to provide a general purpose tool or mechanism of this character' adapted to particularly engage an object adjacent to its base rather than at the top as in present structures, in order to raise the object to the maximum height and thus particularly be useful as an emergency jack for raising automobiles or other vehicles when their wheels are stalled in mud, sand or otherwise.

A second object is to provide a novel construction whereby maximum leverage for its operation is attained.

Another object is to provide a construction having a novel pawl which is automatically operable or movable to a locking position and which is adapted to be actuated manually or by means of pedal mechanism as preferred. n i f It is further aimed to provide the novel and ener-ally improved construction which will e hereinafter described in connection with accompanying drawings illustrating an operative embodiment thereof. Y

In said drawings Figure 1 is a side elevation of the improved jack shown in` full lines in a normal position and with the lifting member thereof suggested by dotted lines in araised position;

Figure 2 is a View of the jack in edge-elevation taken at a right angle to Figure 1;

Figure 3 is a view of the jack in edge elevation opposite to Figure v2;

Y Figure 4 is a top or plan view;

Figure 5 is a detail perspective view of the lifting member alone; n

Figure 6 is a detail perspective view of the standard alone;

Figure 7 is a detail perspective view of the pawl alone;

,Figure 8 is a detail perspective View of a portion of the lifting member showing an extension in place on the lug thereof; and

Figure 9 is a detail perspective view, frag- 10 preferably of metal and integral. with each other and joined by a longitudinal bridge at the front edge as at 11 and-at'theV top and at the rear edge by a bridge 12. Uprights 10 have laterally extending attaching flanges 13 at their lower ends and secured as by means of rivets 14 to a relatively wide metallic or other supporting base 15.V

Slidable longitudinally of the standard A between the uprights 10 is a lifting bar 16, preferably of metal, which is disposed intermediate the bridges 11 and 12 as shown. Bar 16 is adapted to be lifted by a suitablev mech-V anism and to this end is provided with alternate teeth and notches 17 and 18, preferably of the specific shape and example shown. They may dier however as is obvious.

A pawl is provided having horizontal pin 19, a stud 20 and an offset lmanipulating linger at 21. Opposite to bridge 12, the up.- rights 10 are extended to provide ears 22 between which the stud 20 is disposed and to which'the same is pivoted by means of a'pin at 23. The pawl is lthus arranged so that the pin 19 will always move by gravity toward the lifting member 16 and thus seek a position in the adjacent notch 18.

The pawl pin 19 thus serves to permit movement of the lifting member 16 and to` hold the same in adjusted positions.V

Said lifting member 16 may engage the object to be lifted at its upper endand be suitably shaped thereat to accommodate the same, for instance by the provision of a notch at 24. It is preferred however that the lifting member 16 engage the object adjacent the base 15 and to this end has'. a laterally extending lugwhich projects through and beyond the base or opening at the rear Yof the uprights 10. Lug 25 is integral with the lifting member 16 and its upper edge is secured in a horizontal plane. A vertically disposed hole or aperture 26 is provided through the lug 25 and a stud 27 is normally disposed therein, extending from a shoe 28 resting on the lug 25 and being broader than the same and adapted to directly engage the object to be lifted. The stud 27 isremovably 20 bridge,

said pin, an operating finger and a stud integral with said pawl, said operating linger and said stud extending in opposite directions, said stud being pivoted on said pin intermediate said links, an operating lever pivoted to said links, and said standard being cut away below the ears to facilitate engagement of said lever with said lifting member.

2. A jack having a standard provided with spaced uprights forming a slot open at one side thereof, a base, said uprights having outwardly extending flanges integral therewith and attached to said base, a bridge integral with and connecting said uprights above the slot, a lifting member operable between the uprights having object engaging means extending through and beyond said slot, ears integral with and extending from the uprights substantially opposite said a paw] having a pin to coact with the lifting member, a manipulating finger integral with said pawl, a stud integral with said pawl, said linger and stud being at opposite ends of said pin and extending on opposite sides thereof, a pin pivotallysecuring said stud to said ears, links depending from said second mentioned pin, an operating lever pivoted to said links, said standard being cut away below the ears to facilitate engagement of said lever with said lifting member, a link disposed at one side of the standard and connected to said first mentioned pin, and a pedal lever pivoted to said standard adjacent its base and operatively connected to said last mentioned link.

In testimony whereof we affix our signa` tures in presence of two witnesses. K

EDWIN J OXFORD. JAMES PETR. Witnesses CLAUD W. DAVIS, HARRY CARROLL.

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