US1314357A - Derrick - Google Patents

Description

J. J. OLSON.

DERRICK'.

APPLICATION FILED JAN. Il. 19H1.

l -3 l 4,35 '7 Patented Aug. 26, 1919.

4 2 SHEETS-SHEET l.

gru/venlo@ J. l. OLSON.

DERRICK.

APPLICATION FILED IAN. II. |9111.

Patented Aug. 26, 1919.

2 SHEETS-SHEET 2.

35% MM2' /a/J- Gnozum UNITED STATES PATENT OFFICE.

JOHN J'. OLSON, 0F BELVIEW, MINNESOTA.

i i DERRICK.

Specification of Letters Patent.

Patented Aug. 26, 1919.

Application filed January 11, 1918. Serial No. 211,405.

To all whom it ma concern:

Be it known t at I, JOHN J. OLsoN, a citizen of the United States of America, residing at Belview, in the county of Redwood and State of Minnesota, have invented new and useful Improvements in Derricks, of which the following is a specilication.

The invention relates to an improvement in a form of derrick to be used for hoisting one end of automobiles, wagons or the like, so that a full view underneath may be had thereof.

Its principal obiect is to provide a device of this character y means of which either the front or rear end of a vehicle may be raised quickly and eii'ectively.

A further object is the provision of a device of this character which may be readily folded into a compact bundle when not in use.

A still further object is to provide a device of this character which, may be easily and cheaply made 'and which will be simple in construction and operation.

Other and further objects will appear as a detail description of the device progresses.

To the exact construction shown in the drawings, the invention is not to be restricted. The right is reserved to make such changes or alterations as an actual reduction to practice may suggest, provided such changes or alterations do not deviate from the spirit of the subjoined claims.

In the accompanying drawings:

Figure 1 is a side elevation of the invention, showing it in use as a means for raising the rear end of an automobile.

Fig. 2 is a perspective view of the tripod.

Fig. 3 is a perspective view of the vehicle supporting frame.

Fig. 4 is a vertical sectional view through the apex of the tripod and one of the legs thereof.

Fig. 5 is a detail sectional view through the plate connecting the legs of the vehicle supporting frame.

Fig. 6 is a detail sectional view showing the manner in which the attendant sections of the supporting braces for the legs of the 1 has formed on each of its three sides slots 3 which open at the bottom ofl the crown piece and in these slots the upper ends of the legs 2 are attached by pivotal engagement with the pins 4 which are positioned transversely in the slots and are fixed to the walls thereof on opposite sides of the slots. The pins 4 are fixed at substantially the middle of the slots with reference to the length and depth of the latter. Below the point where the pins are carried the slots are made deeper than at higher points, so that the legs 2 may be moved in toward the center ot' the crown piece. To preclude movement of the legs away from the crown piece farther than a specified distance, the slots 3 are so formed that the ends of the legs above the pins 4 may abut the bottoms of the slots.

Each of the legs 2 is provided on its bottom end with a easter 5 that is suitably attached thereto and the three legs are connected near their lower ends by sectional braces 6. Each of these sectional braces 6 comprises a section 7 and a section 8 which are pivotally connected together by means of a stud 9. The free ends of the two sections 7 and 8 connect one to each of any two adjacent legs 2, the connections with the legs being pivotal and effected by means of the studs 10 which loosely engage the ends ot the sections but which are fixed in the legs. The section 8 overlaps the section 7 beyond a point where it effects pivotal engagement with the latter and the end of this overlapping portion receives Va thumb screw 11 which threads through it and sinks its conical end 12 in a counter-sunk conical depression formed in the section 7. The purpose of this screw 11 is to effect a rigid connection between the sections 7 and 8 when it is So desired, the withdrawing of the screw from the conical depression referred to permitting the sections to be moved with reference to each other on the pivotal connection 9. l

On the bottom face of the crown piece 1 a screw eye 13 is suitably attached by threaded engagement in the center of the crown piece. The purpose of this screw eye is to support the block and tackle 14, the free end of the tackle passing down one of the legs 2 and winding on a rotatably mounted drum 15 provided with ratchet teeth 16 and a crank handle 17. A pawl 18 is loosely swung from the leg 2 just below the ratchet teeth and is designed to engage the latter and prevent the drum from such movement Y baseof the trapezoid and supported on pins as will tend to unwind the carried thereon. Y

Coperating with the tripod A there is a vehicle supporting frame B. This frame comprises a plate 19 vand the attendant legs 20 *which are pivotally connected to the plate. In plan the plate 19 has the Vshape of an isosceles trapezoid and the legs 2O are attached thereto on the longer base, being held in slots 21 formed` in this longer.

end of the tackle 22 near-theends of the slots. The slots 21 are so formed that the legs V2O may be moved toward each other but are limitedk to a dis-v tance which they may be moved away from reach other, the ends of the slots wherein the 215 which lies in a plane at right angles with legs are attached being inclined, so that the legs may lie against these inclined ends atA the same,angleofinclination with respect to the parallel sidesof .the plate 19 that the inclined sides of the plate have with respect ,to these parallel sides. An eye 23 is formed transversely inthe plate 19 at the longitudinal center of the latter` and at the opposite side from that in .which the slots 21 vare formed. This eye is designed to be engaged by a hook 24:' carried by the block andrtackle sothat'the plate may be raised for a pur-l pose yet tobe described. The free end'of each leg 20 terminates in a curved portion the plate'19. Just back of these curved por- Y tions'25 the two legs' are joined together by a brace 26 which, with the exception of its longitudinal dimension, is identical with the Y Vbraces 6. Between the brace 26 and the` bile or other vehicle being raised for inspecturned by the crank handle 17. This operation, of course, raises that .axle of the vehicle which the hooks 27 engage and, as Y the frame B is being raised, the casters 10 permit the tripod A to roll in, so that 'the eye 23 in therplate 19 may remain always directly below the center of the tripod. The

` ends of the vframe B haverno casters and their frictional Yengagement with the ground preclude any longitudinal movement of this frame. Raising the end having the plate 19y though, causes this end to describe an areV and the casters on the tripodfA permit the Both these hook members are Y .spect to the ground. Y ,Y

tripod to ,roll in to accommodate for this.V

Y Were this provision not made, the raising of the frame B would move this end to one side fof the center of the tripod v and might result in the overturning ofthe latter..V yAs long as the pawl 18 remains in connection'with .one of the ratchetvteeth of thedrurn 15 any vehicleV that is so raised `with the device will remain suspended for inspection. The removalv of the4 pawl from the teeth will permit the reverse operation of the drum and the lowering -of the frame B.

When the device is not in. use it maybe r easily folded up, the particular method of construction making provision. for this. The disengaging of the screws 11 of thefsec'- Y tion 8 from the conical-shaped.depression in the section7; will'permit the braces .6to

be folded onthemselvesand,` theVv pivotal mountings on the legs 2 will permit their beingfoldedagainst eachother with Ythe foldingrup of the braces. By this means,

the tripod A is collapsed andthe'fvehicle V:

supporting frame ,B- is Vcollapsed in the same wayby the folding up' of itsbrace 26A whichis identical inconstruction with the braces 6. 'IhelframeY Band tripodA may then be formed into a compact bundle for. Y

transportationY t0 age other points. Eor for stor- Y1. In a device as set forth, a hoisting `apparatus, and a vehicle supporting frame, the latter comprising a plate, legs pVotally connected to the plate, thelegs being formed with curved endsl whose extremities lie sub-V he invention having Vbeen described, whatis claimed as new and useful is:

stantially inplanes at right anglesto the 2. In a yvehicle hoist, a hoisting frame," i

casters on which theqsaid hoisting frame is carried, a vehicle supportingv frame having axle engaging means and ground engaging Y.

ends, and hoisting means carried V'by the hoisting frame' and engaging the remaining',V

end of the vehicle supporting frame, where-V by the said endfof the saidsfr-ame may Vbe elevated'to lhoist oneendof avehicle,- the Y casters on the hoisting frame-'permittingthef latter to move as the said'end of the;vehicle supporting frame is raised to keepV suchend below the center of the hoisting frame without movement oftheV ground Vengaging end ofthe vehicle supportingfframe Vwith re-' In testimony whereof -I aiiix my signature.` 'Y

JoiviN J. oLsoN.v

I Copies of thispatent may be obtained for vejcents Veach', by addressing the Commissioner of Iatents,

Washington, D. G.

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