US782133A - Derrick. - Google Patents

Description

PATENTED PEB. 7, 1905.

A. HOHMANN.

DBRRICK.

APPLIGATION FILED MAR. 1s, 1903,

2 SHEETS-SEET 2,

514 -vc nto@ WMI/www0 @l Hoz new Patented February 7, 1905.

UNITED STATES PATENT UEETCE.

ADAM HOHB'IANN, OF EW'ING, NEBRASKA.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 782,133, dated February '7, 1905.

Application filed March 13, 1903. Serial No. 147,662.

To all whom it may concern.:

Be it known that I, ADAM HoHMANN, a citizen of the United States, residing at Ewing, in the county of Holt, State of Nebraska, have invented certain new and useful ,Improvements in Derricks; and I do hereby declare the following' to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to what are commonly known as hay-derricks, although the principles involved may be embodied in derricks for other specific uses, the object of the invention being' to provide a derrick which may be transported from place to place for use in the field or barn and which may be operated either manually7 or by horse-power, the construction and arrangement of the parts being such that the load may be easily and quickly engaged, raised, swung laterally in either direction, and then disengaged either with or without lowering.

A further object of the invention is to provide a simple and efiicient arrangement of braces for preventing tilting of the derrick,

ln the drawings forming a portion of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure l is a perspective view showing a dei-rick embodying' the present invention and equipped for operation by horsepower. Fig. 2 isa perspective view showingl the lower portion of the mast equipped with cranks for manual operation to manipulate the load. Fig. 3 isa transverse section through the derrick-mast and the upper attaching-bolt of the crank mechanism and showing the removable connection of the latter to the mast.

Referring now to the drawings, and more particularly to Fig'. 1 thereof, the present dcrrick includes a triangular base portion comprising sills suitably connected at their ends, and at one corner of which base is mounted the stem 6 of a caster-wheel T. At the other corners of the base are mounted supportingwheels 8. Attached to the corner of the base in advance of the casterwheel isa clevis 9, providing means for attachment of draft appliances by means of which the derrick may be drawn from place to place.

Secured upon two of the sills of the base is a transverse beam 10, having a bearing 11, in which is engaged the pin 12 at the lower end of the mast 13 of the derrick, said mast having its lower end engaged in a metallic socketpiece 14, from which said pin projects, this socket-piece in connection with the beam forminga turn-table for the foot of the mast. Secured in the corners of the base between the sills of which the latter is formed are the braces 15, which converge upwardly and are attached to a sleeve 16, which encirclcs the mast and lits the latter sutliciently close to prevent wabbling of the mast, while permitting of easy rotation thereof. Upon the upper ends of the braces, which are suitably formed for the purpose, is secured an annular plate 1T, which likewise closely encircles the mast. Engaged in the mast at a point below its upper extremity and above the plate 1T is an arm or boom 1S, from which extends a brace 19 downwardly to the mast. Mounted in the upper end of the mast is a pulley-wheel 20, and a second pulle v-\\'l1eel is mounted in the outer end of the boom, and through the boom and mast and over these pulley-wheels is passed a cable which is taken downwardly along the mast and under an idler 21 and has a swingletree at its end, to which may be hitched a horse to raise the fork 23, to which the opposite end of the cable is attached. The cable passes through the annular plate 17 and through the sleeve 16, within the inclosure of which latter the cable lies in a longitudinal groove Q1 in the mast and in which groove it is held by the guides 25 above and below the sleeve, so that wear of the cable against the sleeve is prevented. Attached to the fork is the ordinary trip-line 25, by means of which the fork istripped. When the hoisting-cable is slacked between the draft-animals and the base of the mast, the fork may be drawn downwardly by pulling on the trip-line 25 should the weight of the fork be not sulficient to cause it to descend. By means of l this trip-rope also the boom of the derrick is swung laterally.

To prevent tilting of the derrick under some 1,

conditions, uprights 26 are provided and rest I with their lower ends upon the base-frame,

while their upper ends are connected, and from them is hung a pulley 27, these uprights having braces 28, which rest with their lower ends upon the plates 17. The cable is then taken from the idler upwardly and over the pulley 27and then outwardly for attachment of draft-animals. In this arrangement the strain upon the pulley 27 serves to counteract the pull on thc outer end ofthe boom and tilting is prevented.

When it is desired to raise the load manually, a winding-drum 29 is employed, said winding-drum being carried by a crank-shaft 30, having cranks 3l at its ends, and which shaft is journaled in plates 31 and 32.' The mast has transverse perforations 33, corresponding to perforations 34 in the side plates, and through these plates and the mast may be engaged clamping-bolts 34, by means of which the plates may be clamped to the mast in parallel relation, as shown in Fig. 2. The upper clamping-bolt serves also to hold a pawl 35 in operative relation to a ratchet-wheel 36 on the crank-shaft. When the derrick is to be operated manually,this winding-drumis attached to the mast as above described and the cranks are rotated to wind the cable thereon.

In practice modifications of the specific conf struction shown may be made and any suitable materials and proportions may be used for the various parts without departing from the spirit of the invention.

What is claimed is- 1. A derrick comprising a base having a mast rotatably mounted thereon and provided with a boom, a sleeve encircling the mast, braces extending from the sleeve to the base, an annular plate secured upon the braces and encircling the mast, said mast being grooved longitudinally within the inclosure of the sleeve and plate, pulleys carried by the boom and mast, an idler at the base of the mast, l

and a cable passed over the pulleys, through the groove and around the idler and having a fork at its end beyond the boom.

2. A derrick comprising a base having a mast rotatably mounted thereon and provided with a boom, an annular plate encircling the mast, braces extending from the plate to the base, upwardly-convergent uprights resting upon the base and having a pulley at their upl per ends, braces attached to the uprights and4 4resting upon the annular plate, an idler at the base of the mast, pulleys carried by the mast and boom respectively and a cable passed over the pulleys of the boom and mast and then downwardly around the idler and then upwardly and over the pulley of the uprights.

3. A derrick comprising a base having' a mast rotatably mounted thereon and provided with a boom, an annular plate encircling the mast, braces extending Jfrom the plate to the base, upwardly-convergent uprights resting upon the base and having a pulley at their upper ends, braces attached to the uprights and resting upon the annular plate, an idler at the base of the mast, pulleys carried by the mast and boom respectively, a winding drum mounted upon the mast and having operatingcranks, and a cable having a fork at one end and having its opposite end passed over the pulleys of the boom and derrick and then downwardly around the idler for subsequent attachment to the winding-drum or passage over the pulley of the uprights.

4. A derrick comprising a base having a mast mounted thereon and provided with a

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