USRE4215E - Improvement in hoisting-blocks - Google Patents

Description

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'JQSEPH A. BURR, OFI'BROOKLYN, ASSIGNOR T0 BURR & CO., 0F NEW- vom;1 IN. Y.

Letters Patent No. 108,446, dated October 18, 1870; reissue No. 4,215,- ,datcd December 27,187.0.

IMPROVEMENT IN HOISTING-BLOCKS.

The Schedule reerredvto in the Letten Patent and part of the lame.

. To'all whom it may conce/ru:

Be it known that I, JOSEPH A. Bunn, of Brooklyn, Kings county, New York, have invented, made,

and applied to use certain new aud useful Improvements in the Construction of Pulley-Blocks; and that the following is a full, clear, and correct description of my invention, reference being had to the accompanying drawing making part of this specication, and tothe letters of reference marked thereon, in which- Figure, 1 is affront view of a block made in accordance with my invention.

Figure' 2 is a side view of the same. In vthe drawing,"like parts of the invention are pointed'out by the same letters of reference;

The nature of `my invention consists in certain im- Aprovements, as more fully hereinafter set forth in the D, the lower end-piece; and

. E, the. upper end-piece, which in my block I construct of metal.

lF is the hook or fastening of the block, and G G are rivets which hold the metallicVA end-piece to the shell, and through the shell to'the shcave-pn aud sheave.4 g

In the patent granted Waterman and Russell, in 1844, the hook is fastenedtov a strip of metal which passes down through the inside of the shell, and the sheave-pin passes through this strap. This made the strongest block known.

I make no claim to any metallic connection between' the hook and sheave-pin, which is` covered in said patent.

I construct my block with an ordinary wooden shell, and with the same sheave and shcave-pin as is used in the ordinary block. The lower end-piece i'salso constructed in the ordinaryway.

The upper end-piece I construct of cast Viron ,"`*or other metal. Through this vend-piece the rods are passed, and securely riveted on their ends, thus securing the metallic end-piece to the shell ot' the block; thence the -work is transferred to the pin and sheave. Into the metallic end-piece the hook or fastening is secured in any convenient manner.

This makes a block of considerable strength, which maybe furnished ata moderate cost.

Having thus set forth my invention,

What I claim as new islThe metallic end-piece E, secured tothe hook'ol fastening Fof a pulley-block, as shown, and for'the purposes described.

, JOSEPH A. BURR.- Witnesses: 1

A. SIDNEY Donna, WM. Hssr'nves.

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