US272186A

US272186A - Pulley-block

Info

Publication number: US272186A
Authority: US
Publication date: 1883-02-13
Anticipated expiration: 1900-02-13

Description

A. RAGMAN.

PULLEY BLOCK-g (No Model.)

Paten'ted Feb. 131 '1883.

A Fl..

NV PETERS. PMib-mmm'. Washington. D. C.

l IINTTEO TATES PATENT OFFICE.

ALBEBT BAOHMAN, OE SHELBUBNE, NOvA SOOT1A',OANADA, ASSIGNOB OE ONE-Turno TOJAMES vv. YOUNG, OE BOSTON, MASSACHUSETTS.

PULLEY-BLOCK.

SPECIFICATION forming part of Letters Patent No. 272,186, dated February '13, 1883. Application led August 28, 1882. (No model.) l

l'o all 'Lt/tom it may concern Be it known that I, ALBERT BAoHMAN,a citizen of Dominion of Canada, residing at Shelburne, in the county of Shelburne, Nova 5 Scotia, Canada, have invented certain new and useful Improvements in Pulley-Blocks,

ofthe block is being` pulled, thereby prevent' ing the fall from chaling against the shell of the block and Wearing out the fall and also the shell of thel block, as well as twisting the block out of shape, as is the case with the ordinary blocks. To the e'nd of the swiveled'piece of metal is secured the shackle by means ofa bolt in the usual manner. I prefer to make the swiveled piece from a flat piece of metal, as shown, thereby forming shoulders on opposite sides of the swivel; and, also, I prefer to provide the loop on the strapot' the block with projecting stops, against which the shoulders on the swivel strike and prevent the block from turning entirely around on the swivel, causing the tackle to be twisted; but such shoulders and stops may be dispensed with and the swivel made of a piece of' metal of any other form,

.. and the block allowed to turn entirely around on the swivel, if so desired, Without departing from the spirit of my invention.

Heretolore blocks have been made in which' 4o the shackles have been secured to a projection made in one-piece with the strap ofthe block, or to a-u eyebolt lirmly secured to the block. Such blocks are objectionable, because it is necessary sometimes to pull the fallin a direction which causes the fall to chale against the shell 0f the block and wear out the fall and shell, as Well as twist the block out of shape, because the block cannot turn and conform itself to the direction in which the fall is beingr pulled.

5o 4By using this my improved block these objections are entirely overcome, as the block will turn on the swivel and conform itself to the direction in which the fall is being pulled. This my improved block is more especially adapted to be used as a sheet-bloei; on board of sailingvessels, where it may either be attached to the traveler, or to a crane, or to the boom, in the usual manner, by means of the shackle, and

it is `constructed as follows, reference beingvv ner. Welded or otherwise secured to the strap c is a loop, c', to which is swiveled the piece of metal d, which is shown as having shoulders d' d' on opposite sides, which strike against the projections c c" onv the loop c, to prevent the block A from turning entirely around on the swivel d on the metal piece d, for the purpose described.

e represents a shackle Secured to the metal piece d by means ofthe bolt e and nut e, in such a manner that the bolt e forms a hinge on .which the block A and Swiveled metal piece d may turn, as usual. It will be seen by this arrangement of the connections of the block A to either the traveler, or a crane, or a boom ofa vessel that the block A may turn on the swivel d and bolt e', and conform to any direction in Which the fall of the block may be pulled, and thus prevent the fall from chaln against the shell a of the` block A.

Inthe drawings the strap c is shown as an outside strap; but I do not wish to confine myself to the use of an outside-strapped block, as I may with equal advantage apply my invention to an inside strapped block; also, the loop c may be dispensed with and the metal piece d be swiveled to the strap c Without departing from the spirit of my invention. In case I dispense Wit-li the loop c', I make the projections c" c on the strap c.

Having thus fully described the construction and operation of my invention, I wish to secu re by Letters Patent, and claim- 1. In 1J pulley-block, the shell a., slieave or sheaves b b, and strap c, in combination with the loop o' and stop projections c c thereon, the swiveled metal piece d, with its swivel d and shoulders d d', adapted to stop against the projections c c, and shackle e, with its bolt e hinged to the metal piece d, substantially as and for the purpose setforth and described.

2. 1n a pulley-block, the strap c, extended in Mensa one end to form n loop, c, and provided with stop projections cc, in combination with the 15 metal piece d, secured to and adapted to swivel in the loop c, and having the shoulders d d', to serve as stops against the projections c c, substantially as and for the purpose set forth and described. zo

In testimony whereof I have affixed my signature in presence of tivo witnesses.

ALBERT BACHMAN. Witnesses:

HENRY GHADBOURN, L. N. MLLER.