US255351A

US255351A - Hoisting apparatus

Info

Publication number: US255351A
Authority: US
Publication date: 1882-03-21
Anticipated expiration: 1899-03-21

Description

(No Model.)

E. L'. sToeKINe.

AHOISIINGr APPARATUS.

Patented Mar. 2l, 1882'.

Z2-average?,

Y 2 is a perspective view ofthe standard.

UNITED STATES PATENT OFFICE.

EDGAR L. STOGKING, OF BUFFALO, NEW YORK.

HOISTINGAPPARATUS. l

SPECIFICATION forming part of Letters Patent No. 255,351, dated March 21, 1882.

Application tiled September 19, 1881.

To all whom it may concern Be it known that l, EDGAR L. SrooKrNe, of the cityof Buffalo, in the county of Erie and State of New York, have invented 'new and useful Improvements in Hoisting Apparatus, of which the following is a specification.

This invention relates more particularly to a hoisting apparatus which is designed for elevating lumber in piling it in yards or other places of storage.

The object of my invention is to produce a simple hoisting apparatus which is readily secured in the lumber-pile, which holds the lumber securely while it is being` elevated without defacing it, and which is operated with ease and safety.

My invention consists to that end ofa standard and a grapple of peculiar construction, which will be hereinafter fully described.

In the accompanying drawings, Figure 1 is a perspective view ot' a lumber-pile with my improved hoisting apparatus in position. Fig. Fig. 3 is a perspective view of the shoe. Fig. 4 is a front elevation of the grapple with its jaws open. Fig. 5 shows the grapple closed. Fig. 6 is a vertical section in line .fr or, Fig. 5.

Like letters ot' reference refer to like parts in the several figures.

A represents the standard, which is composed oftwo doWnwardly-diverging legs, a, terminating in backwardly-projeeti ng feet a', and which is provided at the top with a forwardly-projecting hook, b. The feet a are made so thick that they will t snugly in the space between two boards of ordinary thickness. When lumber of greater thickness is piled the feet a of the standard are set on a shoe, C, which receives both feet., and which increases the thickness of the base of the standard, so that it fits snugly in the space of greater height between such boards.

D represents a pulley, which is attached to the hook or other contrivanoe, b, and e is a rope running over the pulley and connected at one enti to the grapple F, while the other end is taken hold of by the operator.

The grapple F consists of two jaws, ff', which remain parallel in all positions as they move toward and from each other in closing and opening.

gis a fulcrum-bar arranged between the upper portions of the grapple, and h h and t' i are two pairs,l of levers, whereby the jaws are (No model.)

connected with the upper and lower ends ot' the bar g, and with two parallel bars, kk. The two,levers of each pair h h and t i cross each other where they are pivoted to the bar g, their inner ends being connected with the jaws j', while their outer ends are connected to the bars 7c. The lever h is parallel to the lever t', and the lever h parallel to the lever i', and the levers ai' are connected with the lower ends of the parallel bars k k. The upper ends of the bars k lo Vproject preferably beyond the point at which the levers h h are pivoted to these bars, and are connected by chains or ropes l l to a ring, m, to which the hoistingrope c is attached. Upon drawing on the rope e the bars 7c k are made to approach each other, whereby the jaws f j" are similarly moved, and upon releasing the rope the bars la k and jaws ff are permitted to separate. During these movements the bars k lo and the jawsff remain parallel with each other, the lever h remains' parallel with the lever i, and the lever h with the lever 'i'.

n represents semi spherical projections formed on the inner sides of the lower ends of the jaws ff' for the purpose of seizing the boards. These projections enter the boards sufficiently to hold the boards lirmly, but do not mar or defacethe surface of the boards, like pointed grapples. The semi-spherical projections also permit the boards to turn and assume a vertical position in being hoisted.

I claim as my inventionl. The hoisting-standard A, provided with legs a a,terminating in rearwardly-projecting feet a', arranged in the same horizontal plane, and adapted to enter between the boards of a pile of lumber, and a forwardly -projecting hook, l), to which the ropepulley is attached, substantially as set forth.

2. The combination, with the hoisting-standard A, provided with feet a', of the detachable shoe O, whereby the thickness of the base can be increased, substantially as set forth.

3. The hoisting-grapple F, composed of parallel jaws ff a fulcrum-bar, g, levers h IL t' i', and bars lc k', having their upper ends connected with the hoisting-rope, substantially as set forth.

E. L. STOOKING Witnesses:

JNO. J. BONNER, EDw. J. BRADY.