US350704A

US350704A - stretch

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Publication number: US350704A
Authority: US
Publication date: 1886-10-12
Anticipated expiration: 1903-10-12

Description

2 Sheets-Sheet 1.

(No'Model.)

D. STRETCH. FREIGHT HANDLING MEGHANISM.

Patented Oct. 12, 1886.

-lf g gip* WITNESSES: INVENTOR:

ATTORNEYS.

N. PETERa Pham-Dummpkw` wnsningmn, D. C.

(No Model.) 2 Sheets-Sheet 2. D. STRETCH.

FREIGHT HANDLING MEGHANISM. No. 350,704. Patented Oct. 12, 1886.

WITNESSBS: NVBNTOR ATTORNEYS.

N. PETERS. PhowLixhognpnw. wnminpmn, DA C.

. WH, WU

` or attached to the center UNITED STATES PATENT FFICE@ DRE\V STRETCH, OF LIVERPOOL, ENGLAND.

SPECIFICATION forming part of Lettels Patent No. 350,704. dated October 12, 18.26.

l Application filed June 3, 1886. Strial No. 203,992. (No model.)

To all whom it may concern:

Be it known that I, DREW STRETCH, of Liverpool, England, have invented a new and useful Improvement in Freight Handling` Mechanisms for Vessels, of which the following is a full, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding` parts in all the tigu res.

Figure l is a perspective view of my im proved freight-handling mechanism shown as applied to a Steamship. Fig. 2 is a side elevation of the same, shown in a raised position. Fig. 3 is a plan view of a part of the same. Fig. 4t is a sectional side elevation. of a part et' the same, taken through the line zr, Fig. 3. Fig. 5 is a sectional elevation ot the adjustable hoisting-rope stop.

The object of this invention is to provide freight-handling mechanisms for vessels, constructed in such a manner as to cause the freight to be raised and lowered vertically, and to bring the said freight into position to be dumped into the chutes or other desired places.

The invention consists in the construction and combination of Various parts of the freight handling' mechanism, as will be hereinafter fully described and then claimed.

A represents a Steamship. B is the chute through which coal is conducted to the bunkers, and which is supported i n place by ropes (J, attached to it and to the steamship A. Against the side of the Steamship A, and a little above the chute B, is placed a plate or skid, D, which is secured in place by ropes E, attached at one end to eyebolts or ring-bolts F, attached to the corners of the said skid. The other ends of the ropes E are secured to any convenient part ot' the Steamship A. To the upper part of the skid D is secured by bolts or rivets the baseplate of the socket G, in which is placed the pivot H, formed upon of the lower side of the bar I. Upon the ends of the coupling or pivot barlare formed or to them are attached upwardlyprojecting lugs J, into which are rigidly secured the ends of the short rod or shaft K. Upon the rod K is placed a spiral spring, L, one end of which is secured to the said rod K. The other end of the spring L is attached to the bearing M, through which the rod K passes, and which is firmly secured to theinnerendot the long boom N. The springl L prevents the outer end ol' the boom N from moving too quickly or too Yt'ar when swung upward and inward bythe lioistingi'ope, as will be hereinafter fully described.

The boom N is slotted longitudinally nearly to its ends, and to the end parts ot' the upper side otl the said boom are attached bearings O, in which are jonrualed the ends of two parallel screws, l?. The inner ends ot' the parallel screws P project, and to them are rigidly attached small ehain-wheels Q, around which passes a short endless chain, R, so that the two screws will always turn together. To one ofthe chainwlieels Q is attached a erank-piu, S, to serve as a handle tor conveniently turning the screws l. Upon the screws P are placed nuts T, the lower sides ot' which are extended to rest upon or be close io the upper surt'ace of the boom N, so that the said nuts will be held trom turning. The nuts T are connected by a curved bar, U, which serves as a guard to keep the hoisting-rope, hereinafter described, in place upon the pulley V,

journaled in bearings in the adjacent' sides ot' the nuts T.

The downward movement. ci' the outer end ofthe boom N is limited, and the said boom is supported when in its lowest position by guyropes XV, the lower ends ot' which are connected with the saidbar at its side edges. The other ends ot the guy-ropes XV are secu red to some convenient part ot' the stenmship.

' X is a eoal-bueketto the bail of which is attached the lower end of the hoistingrope Y, either directly or by means et' a short chain interposed between the said bail and rope to prevent the said rope l'rom being worn or cut by contact with the coal in the hold of the lighter. The hoisting-rope Y passes over the pulley V, and over a pulley, Z, the block of which is secured to the upper end of a spar, a, secured at its lower end to the steamship, and held in the desired position by guy-ropes b. From the pulley Z the hoisting-rope Y passes around a pulley, c, the block ot' which is secured to the deck or other convenient part of the Steamship. From the pulley c the hoistingrope Y passes to the donkey-engine or other power by means of which it is operated.

Upon the hoisting-rope Y, beneath the boom N, is secured a stop, d, which in the drawings is represented as being made in the form of a ball; but the shape isinnnaterial so long as it has such a shape and size that it cannot pass through the slot of the boom N, and will take K a substantial bearing upon the lower side of the said boom. The stop-ball d is perforated for the passage of the hoistingrope Y, and within the said stop,at one side of the perforation, is formed a groove, e, in which is placed a clamping-strip, f. The strip f is forced inward to clamp the hoisting-rope Y by a screw, g, which passes in through a screw-hole in the side of the stop d, and its forward end rests against the center of the clampingstrip f, so that the said strip can be forced inward against the side of the hoisting-rope Y by turning the said screw g forward. The inner surface of the stop d and the face ofthe clamping-strip f are corrugated or roughened to cause them to take a firm hold upon the said rope. The stop d is attached to the hoistingrope Y at such a point as to rest against the lower side of the boom N when the said boom is at its highest point of upward movement and the bucketX is in position to be dumped, as shown in Fig. 2. With this, construction when the various parts of the apparatus are in the position shown in Fig. 2 and the hoisting-rope Y is slackened, the outer end of the boom N will swing downward and the bucket X will swing outward, the pulley V lbeing so arranged that the said bucket X will be directly over the hatchway of the lighter, and will thus pass through the said hatchway without striking its combing as the hoisting-rope continues t be slackened. As the hoisting-rope Y is wound up the bucket X.

will pass up vertically until the stop d strikes the under side of the boom N, when the outer end of the said boom N will be raised, and the bucket X will be swung inward, so that the said bucket, when the boom N reaches the limit of its upward movement, will be in position to be dumped into the chute B. The boom, lby adjust-ing its guy-ropes WV, can be swung laterallyr upon its pivot .H to either side, as the position of the lighter may require.

I have lshown and described my invention as applied to coaling steamships, but do not limit myself to that application, as it can be used with advantage in transferring cargoes to and from vessels' and for various other purposes. h is a platform placed a little below the mouth of the chute B, for the men who dump the buckets to stand upon, and which is supported by stay-ropes 2', attachedto it and to the vessel A.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A freight-handling mechanism for vessels, containing the following elements, namely: a boom supported at one end on the vessel and jointed to swing vertically and laterally therefrom, a pulley-wheel and devices for longitudinally adjusting the pulley on said boom, a hoisting-rope, the latter passing`V over the adjustable pulley,to lift and swing in the cargo, and guy-ropes t0 steady the boom, all in combination, as herein shown and described.

2. Thelongitudinally-slottedboom carrying the parallel screws having actuating mechanism, in combination with the pulley, with its axis supported in nuts traveling upon said screws, substantially as and for the purpose set forth.

3. The longitudinally-slotted booni carrying the parallel screws having actuating mechanism, in combination with the pulley with its axis supported in nuts traveling upon said screws, and the hoisting rope or chain having an adjustable stop, substantially as and for the purpose specified.

4. The combination, with the skid having upon its one side, at the upper edge, a socket or eye, of the boom and its pivot-supporting bracket or bar, having acentral pivot entering the eye or socket ot' said skid, substrntially as and for the purpose described.

5. The combination, with the boom and its pivotalpin and bracket or bar, of the spring connected to said bracket or bar and pin, substantially as and for the purpose specified.

6. The combination, with the adjustable skid,

of the boom and its pivot-supporting bracket I or bar having a pivotal connection with said skid, substantially as and for the purpose specied.

7. In afreight-handling mechanism for vessels, the combination, with the boom N, coupling-bar I, and rod K, of the spring L and means for supporting the coupling or pivotal.-

bar, vsubstantially as and for the purposes specified.

DREW STRETCH. WVitnesses:

J AMES T. GRAHAM, C. SEDGwIcK.

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