US884666A - Derrick. - Google Patents

Description

PATENTE) APR. 14, 190s. W. KIRTLAND.

DBRRIGK.

APPLICATION PIL'ED NOV. 8, 1907.

rn: Mums Firmes co,. wAsmNsrbm'D. c

WILLIAM KIRTLAND, 0F SAFINRD, ARIZONA TERRITORY.

, 'DERRIGK Specification of Letters Patent.

Patented April 14, 1908.

Application led November 8, 1907. Serial No. 401,263.

To all whom it may concern:

Be it known that I, WILLIAM KIRTLAND, a citizen of the United States, residing at Saf ford, in the county of Graham and Territory of Arizona, 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 derricks for stacking hay; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure l is a side view of the derrick. Fig. 2 is a plan view of the same.

A is a foundation piece, which is formed of two arms secured crosswise of each other, but in carrying out this invention any other approved foundation may be used for support' the mast, or the mast may be secured in a hole in the ground.

B is the vertical mast the lower end of which is provided with a tongue t which fits loosely in a hole in the center portion of the foundation piece. Two downwardly curved plates C are secured to the top of the mast crosswise of each other, and each plate has a hook c at each end, so that a hook 1s arranged at each side of the mast. C

D are three guy ropes which extend from three of the hooks c to the ends of three of the arms of the foundation piece, but when the mast is secured in a hole in the ground these ropes may be secured to stakes or in any other ap roved manner, l y

E is abracket which is secured to one side of the lower part of the mast. This bracket is preferably formed of a sin le late of iron having its middle part bent ou le to form a prriecting lug e at a right angle to the mast.

is a forked bracket provided on its lower side with a vertical ivot which is mounted to revolve in a ho e in t e lug e.

G is the 'ib of the derrick which is provided with a soc et g at its lower end which is ivoted to the forked bracket F b a pin so that the jib may be raised and owered in a vertical plane by .varying the length of the stay-rope J. This socket g is preferably formed of a sin le plate which is bent doubley so that it strad les the end portion of the jib, and j is an eye below the lower end of the jib for engaging with the pivot pin h of the forked bracket.

J is the stay rope which is secured to the up er end of the jib, and which passes over a pu ley block K pivoted to the top of the mast. The lower end of this stay rope is adjustably connected to fastening pieces c on one side of the lower part of the mast.

M is the lifting rope of the derrick. One end of this rope is secured to the hay fork, and the rope passes over a pulley block m suspended at the top of the jib. Twohooks or other similar fastening devices are secured to the foundation piece, one on each side of the mast. These two hooks N are provided so that a pulley block n can be connected to the foundation piece at whichever side of the mast is most convenient. The lifting rope passes over the pulley block n, and its lower end is connected to a horse or to any approved source of ower.

When the load 1s raised by the lifting rope, the jib is swung around as far as desired in one direction or the other so that the hay may be dumped in the required place.

A derrick constructed in this manner is made with very little expense, and with but little skilled labor, and it can he put up and taken apart as often as desired.

What I claim is:

1. In a derrick, the combination, with a mast, and means for securing it in position; of a bracket formed of a single plate of metal having its middle part bent double to form a projecting lug and having its end portions secured to the said mast, a forked bracket pro- ,vided with a vertical pin which is pivoted in a hole inthe said lug, a jib, a socket secured to the lower end of the said jib and formed of a single plate of metal bent double and forming an eye which is pivoted in the said forked bracket, a stay rope connected to the said jib and mast, and lifting tackle carried by the said jib.

2. In a derrick, the combination, with a mast, and means for securing it in position; of a bracket formed of a single plate having its middle art bent double to form a projecting lug an having its end portions secured to the said mast, a bracket provided with a vern testimony whereof I have aixed my tical pin Which is ivoted in the said lug, a signature in the presence of two Witnesses.

jib pivoted to the ast said bracket, a stayrope connected to the said mast and jib for WILLIAM KIRTLAND' 5 su porting the jib and adjusting it in a verti- Witnesses:

ce plane, and lifting-tackle carried by the "m W. B. FONDA,

said jib. JOHN F. BROWN.

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