US228335A - Tackle or pulley block - Google Patents

Description

T. R. FERRALL, Tackle or Pulley-Block;

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THOWAS R. FERRALL, OF BOSTON, ASSIGNOR TO HERBERT LOUD, OF

EVERETT, MASSACHUSETTS.

TACKLE OR PULLEY BLOCK.

SPECIFICATION .formingpart of Letters Patent No. 228,335, dated June 1, 1880,

Application filed December 29, 1879.

To all whom it may concern Be it known that I, THo As R. FERRALL, of Boston, in the county of Suffolk and State of ll/Iassachusetts, have invented certain new and useful Improvements in Tackle or Pulley Blocks, of which the following is a full, clear, and exact description.

This invention consists of a tackle or pulley block in substance constructed with wooden sides or checks and a cast-metal-preferably malleable-iron--frame, which is in two sections, each shaped to surround the edge of each of the wooden checks, to which they are secured by screws, rivets, or otherwise, and to permit the snug insertion and removal of said checks in an axial direction, and both joined or connected by cross-bars, which, preferably, are in one piece with them, and are diametrically opposite to each other, and with a metalpreferably wrought-iron-strap which has two prongs or legs, that at one end are joined by a cross-piece, which may be constructed with an eye or a hook, or otherwise, for suspension from any given point or supportas, for instance, from an eye or ring or mousing-hook, &c.and that pass through holes inone of said cross-bars of the said metal frame and lie against or within the wooden checks, which at their inner portions are suitably grooved therefor, and, together with said cheeks, are bored or otherwise suitably adapted to receive the pintle or axle of the block, all substantially as hereinafter described.

In the accompanying plate of drawings this invention is illustrated.

Figure 1 is a face view of my improved tackle-block and a mousing-hook of my improved construction, which has two hooks or eyes or rings in the same plane and direction; Fig. 2, an edge view of above; Fig. 3, a crosssection on line a a, Fig. 1; Fig. 4., a section on line 0 c, Fig. 1; Fig. 5, a section on line 20 w, Fig. 2, with the sheave or pulley removed.

In the drawings, A A represent the two sides or cheeks of a tackle-block. These two cheeks are each made of Wood, lignnm-vitte or other hard wood being preferable, and the edge or periphery a of each cheek is surrounded by a similar rim or frame, b. Each rim or frame I) is metal, preferably malleable iron, which is suitably shaped to closely fit about its cheek, and is made with a flange, c, to lie against the inner face, (I, of the cheek,

which, preferably, is cut away so as to bring such flan ge flush therewith.

ff are pins or rivets passing through frames or rims I) b and entering wooden cheeks, thus securing the same together. g g are two cross-bars, joining the frames or rims I) together'at points diametrically opposite to each other. These bars 9 g are metal, preferably malleable iron, and in one piece with the frames or rims b, which thus become one flange or rim, capable of receiving and holding the two cheeks A, as aforesaid.

h is a strap of metal, preferably wroughtiron, having two parallel legs or prongs, l l, which at one end are joined by a cross-bar, m, in one piece with the same, and pass through holes n n in one cross-bar, g, of the cheek frame or'rim b I), and lie within diametrical grooves 0 0 in the inner faces, (I, of the checks, where, together with the said cheeks, they are bored to receive the pintle or axle-pin p of the pulley-wheel 4" to the block.

A tackle-block constructed as above described is light, strong, safe, and durable, all essential in its wear and tear. It enables a sheave or pulley-wheel to be used of as nearly as large diameter as that of the metal frameas, for instance, with an eight-inch tackleblock a pulley or sheave can be used as large as the pulley or sheave heretofore capable of being used with a ten-inch tackle-block of the ordinary construction, and by rounding the exposed edges of the metal frame the wear of the rope by contact therewith is in a great measure prevented.

Blocks of the construction above described obviously may be made for two or more pul- Icy-wheels or sheaves on a common pintle or axle-pin, separated by partitions having their edges or peripheries covered with metal rims, or flanged, as described, for the checks.

The metal frames may be fastened to the wooden checks in various ways other than that herein particularly describedas, for instance, by screwing the wooden cheeks into the metal frame; butthatdescribed obviously inside wrought-iron metal strap h, arranged 10 is most effectual, simple, and suitable. in relation to the said frame I) b and the cheeks Having now described my invention, What A, all substantially as and for the purpose I claim, and desire to secure by Letters Patspecified.

5 ent is A tackle or pulley constructed with the THOMAS FERRALL' wooden cheeks or sides A A, the malleable- Witnesses: iron frame I) b, surroundingsuch cheeks and EDWIN W. BROWN,

attached thereto, as herein shown, and the W. S. BELLoWs.

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