US267089A

US267089A - leirmann

Info

Publication number: US267089A
Authority: US
Publication date: 1882-11-07
Anticipated expiration: 1899-11-07

Description

(N0 Model.)

G. W. LEIRMANN.

SWIVEL 500K.

No. 267,089. 'Patented Novi 7, 1882.

' Inventor r ttorney.

PETERS, mwumgmpher, wminglm u. c,

UNITED STATES ferritin.

'PATENT GEORGE W. LEIRMANN, OF BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO TIMOTHY GINGRAS, OF SAME PLACE.

SWIVEL-HOOK.

SPECIFICATION forming part of vLetters Patent No. 267,089, dated November 7, 1882.

A Application filedMay 25, 1882. (No model.) I

To all 'whom tt 'may concern Beit known that I, GEORGE W. LEIRMANN, of Buffalo, in the county ot' Erie and State ot' New York, have invented certain new and useful Improvements on a Swivel Hook; and I do hereby declare that the following description of my said invention, taken in connection with the accompanying sheet of' drawings, formsa full, clear, and exact specification, which will enable others skilled in the art to which it appertains to make and use the same.

This` invention has general reference to pulley-block, boat, and other hooks; and it consists essentially in the novel combination of -parts and details of construction, as hereinafter lirst fully set forth and described, and then pointed out in the claims.

In the drawings already mentioned, which serve to illustrate my said invention more fully, Figure lis a side elevation of a swivel or boat, Ste., hook. Fig. 2 is a longitudinal sectional elevation ofthe same. Fig. 3 is a front elevation. Fig. 4 is a side elevation, and Fig. 5 a longitudinal sectional elevation, of a pulleyblock constructed in accordance with my said invention.

The object of my present-invention is theproduction ot' a hook for boat and other use that shall disengage its load as soon as the latter meets an obstruction-as, for instance, in detachingboats from the davits, 85e., or in lowering merchandise, 86e., by means ot' a block and tackle; and it consists essentially ofa weighted hook pivoted within a bifurcated frame in such manner that unless the hook is depressed on account ot' its suspending a load the weight on the hook will cause it to disengage therefrom, substantially as hereinafter fully set forth and described.

A indicates a bifurcated frame, composed ot' the two parallel members A A, having on or ratherjoining on their upper end ahead, a, said side pieces, A A, being' provided centrally with bosses B B', for the reception ot a mandrel or axle, C. Upon this axle is journaled ahook, G,having'on one endasphericalor other counterpoise, H, provided with an eye or ring, I, andon its opposite end the usual hook proper, F. In the face ot' the side pieces, A A, are indents E, arranged in such manner that whe-n the apparatus is in the condition illustrated in Figs. 2 and 3 these indents, together with the seinicircular contour ot' the hook F, form a circular aperture for the reception ot' a ring, rope, or other means by which a load is to be elevated or lowered.

In the head a is provided a swivel, J, having a collar,J, a shank, K, anda bearing-collar, K', said swivel being formed entire inany one ot the well-known processes ot' casting in mallea- 6o' ble iron or steel or forging, and it is cast within the head of the frame in the following manner: A pattern ot' the desired size, 85o., having been procured, the same is molded in the sand, and a tinished swivel, J, placed in the mold, it having previously been heavily coated with the usual substances` to prevent adhesion. Now, the metal is poured and a complete frame cast, having the shank K and collar K embedded in the head a. 7o

In this manner a very cheap, durable, and serviceable swivel-hook is produced, which,it` cast in steel, is far superior to any forged article as now manufactured.

As applied to a pulley-block, L, having the sheaves M, my present invention is fully illustrated in Figs. 4 and 5, so that I need not enter into the details of construction, which will be readily understood without further explanation.

In operation aload is upheld by the pivoted hook as long as the same does not meet an obstruction capable of sustaining said load-as, for instance, in lowering a boat from thedavits, where the boat is provided with rings on the bow and stern, which rings are engaged by the swivel-hook shown in Figs. l, 2, and 3. As soon as the boat strikes the water the hooks G will disengage thering on account of the counterpoises H, and thereby liberate the boat.

To prevent swamping, aline may be run from the eyes I, which as long as it is pulled may prevent the hook from unlocking. For other purposes than boat-detaching an aperture,f, in the endg of said hook, and a pin, &c.,f, inserted into said aperture, will prevent the hook from unlocking, unless said pin, Ste., is first withdrawn from said aperture. This part of my device may, however, be modified in variousmannerswithoutdepartingessentiallyfrom :on my invention. y

Having thus fully described my invention, I

'hook being pivoted between the parallel inembers A A" rof said frame, and constructed to operate in conjunction with the said indentations E in said frame, substantially in the munner as and for the object stated.

2. The improvement in detachng-hooks,

substantially as described, consisting essentially in the combination, with an O-shaped frame having` in its lower parts seniicircular indents E, of a hook, F, having on one end the curved part or hook proper, forming in conjunction with said semicircular indents E :L substantially-circular aperture for the reception of a ring, ne., and on its opposite end a counter-Weight, H, said curved part g being provided with an aperture, f, for the reception of a locking-mmf', and the Whole constructed for operation substantially in the manner as and for the use and purpose specified.

In testimony thatl'claim the foregoing as my invention I have hereto set my hand in the presence of two subscribing witnesses.

. Y GEO. W. LEIRMANN.

YVitness:

MICHAEL J. STARK, JOHN O. DUERR.