US43541A

US43541A - Improved pulley-block

Info

Publication number: US43541A
Authority: US
Publication date: 1864-07-12
Anticipated expiration: 1881-07-12

Description

d llNiTED STATES PATENT OFFICE.

N. O. WHITOOMB AND WILLIAM PADDOGK, OF OAK HILL, NEW YORK.

IMPROVED PU LLEY-BLOCK.

Speciiieation forming part of Letters Patent No. 4354i, dated July 12, 1864.

To all whom it may concern Beit known that we, N. C. WHIrooMB and WILLIAM PADDocK, both of Oak Hill, in the county ofGreene and State of New York, have invented a new and Improved Pulley-Block; and we do hereby declare that the following is a full, clear, and exact description of the saine, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a side view of our invention, partly in section. Fig. 2 is a side View of the same in an inverted position. Fig. 3 is an edge view ot' the same.

Similar letters of reference indicate corresponding parts in the several igures.

lhisinvention consists in having the pulleyblock constructed of cast-iron with the swiveleye secured in the block by casting the latter around the i'ornicr, and having the block cast in such a torni that it may be used either in an upright or an inverted position, as maybe required, and the rope retained on the pulleys at all times or in any position in which the device may be used.

The invention is more especially designed for use in connection with horse hay-forks.

'lo enable those skilled in the art to fully understand and construct our invention,we will proceed to describe it.

A represents the block, and B the pulley, ttted on an axis, f/,in the block. There is no peculiarity in the pulley. It is fitted loosely on its axis a, the latter being secured in the block by heading or riveting it at its ends. The block A is of castiron, and it is designed to have it of skeleton form to insure lightness. One part otitis composed of two sector-shaped sides, b b, the outer parts of which extend beyond the periphery ot' the pulley B, and are connected at their centers by a transverse portion, c, in which the shank d of the swiveleye C is fitted and allowed to rotate freely. The other part ot' the block is composed of two straight bars, c c, which extend from the axis of the pulley-one at each side of the latter-and project a tritle beyond its edge, and are connected at their ends by a crossbar, f. The inner parts of the sector-shaped sides b b, are curved and unite with the bars e near the ends of the axis a of the pulley. The parts thus described, which compose the blo 5k A, are all cast in one piece and the transverse portion c ofthe parts b b is cast around the shank d of the swivel-eye, the shank having an'expanded or enlarged inner end, cx, to prevent its Withdrawal from c. (See Fig. l.) By this means a cast-iron swivel-eye may be einployed, as no 'heading or riveting is required to secure the shank d in c..

The sector-shaped sides b I) of the block retain or hold the rope on the pulley B, and the transverse portion cis not suiiiciently wide to interfere with the rope in case the block is used in an inverted position, as shown in Fig.

2, with the rope passing underneath the pulley in a horizontal direction. lhis is an important feature ofthe invention, i'or when the pulleyblock is used with a horse hay-fork it is necessary to have one on the tloor ofthe barn in an inverted position for the rope to pass under, the horse being attached to the end of the horizontal part ofthe rope. When the pulleyb1 )ck is thus inverted, itmay be retained in position or prevented from falling over on the tloor by a small rope or cord attached to the cross-barf, the swivel-eye@ being iitted on a hook in the floor. By this mode ot construction we obtain a very simple, cheap, and desirable pulley-block.

We are aware that cast-iron pulley-blocks have been used; but none, so far as we can learn, have ever been castwith open sides to admit ofthe rope passing horizontally underneath the pulley when the block is iu an inverted position, nor any cast around the shank ot' the swivel-eye to secure the latter in the block.

We claim, therefore, as new and desire to secure by Letters Patent As a new article ot' manufacture, the pulleyblock constructed as herein represented and described.

N. C. WHITCOMB. WILLIAM PADDOGK. Witnesses:

WM. M. BUGG, WELLMAN H. PADDooK.