US363101A

US363101A - Tekritoby

Info

Publication number: US363101A
Authority: US
Publication date: 1887-05-17
Anticipated expiration: 1904-05-17

Description

(No Model.)

J. B. WALLACE.

DERRICK.

Patented May 17, 1887.

NTTE STATES PATENT FFIQEQ JOHN B. \VALLAOE, OF \VALLA \VALLA, \VASHINGTON TERRITORY.

DERRICK.

SPECIFICATION forming part of Letters Patent No. 363,101, dated May 17, 1887.

. Serial No. 217,614. tNomodel.)

T 0 aZZ whom it may concern.-

Be it known that I, JOHN B. WALLACE, a citizen of the United States, residing at Walla \Valla, in the county of Walla Walla, VVashington Territory, have invented a new and useful Improvement in Derricks, of which the following is a specification.

My invention relates to an improvement in derricks for stacking hay and grain; and it consists in the peculiar construction and combination of devices, that will be more fully set forth hereinafter, and particularly pointed out in the claims.

In the drawings, Figure 1 is a side elevation of a derrick embodying my improvements. Fig. 2 is a top plan View of the same. Fig. 3 is a transverse sectional view taken on the line 00 m of Fig. 2. Fig. 4 is a detached view of the link M.

A represents the ground-frame, comprising the sills or runners B, the crossbars 0, connecting the ends of the said runners, and the cross-bar 1), connecting the centers thereof. One end of the said cross-bar D projects beyond one side of the frame. From that portion of the bar D which is midway between the sills or runners projects a vertical standard, E, which is held firmly in position by means of inclined braces F.

G represents a yoke that is provided with a depending shank, H, which is swiveled in a vertical opening made in the upper end of the standard, so that the said yoke is free to turn thereon. The upper end of the yoke is bifurcated to form ears I, through which extends a transverse bolt, K.

L represents an arm which is fulcru med at a suitable distance from one end on the bolt K, and is free to move thereon in a vertical direction. The short end of the arm is connected to the lower end of the standard by means of a flexible link, M. This link consists of the bar at, the links or rings m, pivoted thereto at its opposite ends, and the securingscrews m carried by the links or rings. The screws are inserted in the lower end of the arm L and the lower end of the standard E, respectively, and can be readily adjusted so as to adapt the derrick to the height of the being pivoted to the bar at, allow the arm L to swing freely and'easily, and thereby relieve the strain on t-herope U, hereinafter referred to. On the under side of the arm L, between the fulcrum K and the short end of the arm, is a guidingsheave, N.

0 represents a similar guidi rig-sheave, which is under the outer end of the arm L. On one side of the cross beam D, near the lower end of the standard, is a guiding-sheave, P, and to the projecting end of the said crossbeam is attached a guiding-sheave, R.

8 represents an elevating-rope, which passes around the sheave P, extends under the arm L, and passes over the guiding-sheaves N and 0. To the depending outer end ofthe rope S is attached a fork, T, which may be of any suitable preferred construction.

U represents a rope which has one end attached to the short end of the arm L, and from thence the said rope passes around the guidingsheave R and is attached to the elevatingrope S. The'rope U is slack when the hayfork is on the ground.

The operation of my invention is as follows: The derrick is stationed near the point where it is proposed to erect the stack, and the hay or straw is gathered by the fork T. A horse is hitched to the outer end of the elevatingrope S and is caused to move outwardly from the derrick. This causes the elevating-rope S to lift the fork with its load of hay until the fork reaches the outer end of the arm L. By this time the rope U is tightened, and as the horse continues to travel from the derrick the said rope draws laterally upon the lower end of the arm L, thus causing the latter to swing to one side, so as to suspend the forkful of hay above the proposed stack. The horse is then backed, which causes the forkful of hay to be lowered onto the stack, as will be very readily understood.

I am aware that it is not new to provide a hay-derrick with an inclined arm which is swiveled at an intermediate point of its length upon a vertical standard which is fixed to the horizontal runners, a swiveled pulley being connected to the lower end of the vertical standard, and a rod .being easily connected to stack, as will be understood. The rings m,

the short end of the inclined arm and to one of the runners, and an elevating-rope being passed through the pulley at the lower end of the standard and through pulleys on the lower side of the inclined arm, a short rope being connected to the short end of the inclined arm and attached to the elevatingrope at the point where the whiffletree is connected thereto.

I am also aware that a hay-elevator has been constructed prior to my invention which comprises a suitable base, a vertical swiveled standard connected thereto, an inclined arm pivoted on the upper end of the swiveled standard, a horizontal arm affixed to the swiveled standard near its lower end and having a swiveled pulley in its outer end, and a pulley swiveled to the base on one side of the arm. An elevating rope passes through suitable sheaves on the ends of the inclined arm, and thence passes through the pulley swiveled to the base on one side of the short horizontal arm, so that when the load is elevated the rope will draw upon the inclined arm and turn the latter and the vertical shaft horizontally to the place where it is desired to unload, the horizontal movements of the in clined arm and vertical standard being controlled by a rope which is connected to the lower shorter end of the inclined arm and passing through the pulley in the outer end of the short horizontal arm.

My invention differs from these prior devices in that I employ a sheave, P, connected to the base on one side of the vertical standard, and through which the elevating-rope passes before it passes through the sheaves on the inclined swiveled arm, a pulley or sheave, B, being likewise connected to the base on the I opposite side of the standard from the sheave P, and a slack rope, U, passing through the sheave R, and connected at one end to the lower end of the inclined arm and at its other end to the elevating-rope, said rope U being slack when the elevating-cord is lowered, and being tightened when the cord is raised to pull upon the inclined arm and swing or turn it laterally to the stack or place where it is desired to unload. I attach especial importance to this peculiar arrangement of the pulleys and elevating and slack ropes, as I am thereby enabled to produce a derrick in which the inclined arm will be automatically turned horizontally to the dumping-point after the elevating-cord and the load have been raised.

Having thus described my invention, I claim- The herein described derrick, comprising a suitable base, a vertical standard affixed to the base, an inclined arm swiveled onthe standard, a sheave, P, connected to the base on one side of the standard, an elevatingrope passing through the sheave P and guided in suitable sheaves on the inclined arm, a link connected to the lower end of the inclined arm and the standard, a sheave, R, connected to the base on the opposite side of the standard from the sheave P, and a slack rope passed through the sheave It, and connected at one end to the lower end of the arm and at its other end to the elevating-rope, the slack in the rope U being taken up by the elevating-cord when the weight connected to the same has been raised, and thereby causing the rope U to draw npon'the inclined arm and swing the same and the load laterally, all combined and arranged for operation substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature ill presence of two witnesses.

. JOHN B. \VALLAOE.

\Vitnesses:

ALFRED N. MARION, ARTHUR G. MARION.