US879680A - Pulley-block. - Google Patents

Description

PATENTED FEB. 18, 1908.

C. I. SCOTT.

PULLEY BLOCK.

APPLICATION FILED OCT. 5, 1907,

Snow/whiz eturn sia'rns PATENT onnion.

CHARLES l; SCOTT, OF CHARLOTTE, MICHIGAN, ASSIGNOR'TO SCOTT'MANUFACTURING CO.,

OF CHARLOTTE, MICHIGAN.-

PULLE Y-B LOCK.

Specification of Letters Patent.

Patented net. 18, 1908.

Application filed October 5. 1907. Serial No. 396.089.

- citizen of the United States, residing at Charlotte, in the county of Eaton and State of Michigan, have invented a new and useful Pulley-Block, of which the following is a specification.

This invention relates generally to pulley blocks, and particularly to one of that class employing a 'wooden sheave.

The object of the invention is, without in the least detracting from the stability and wear resisting qualities of such articles, materially to simplify their construction, lighten their weight, and lessen the cost of their production, and further effectively to protect the sheave from injury, as from blows, or the like.

With the above and other objects in view,

as will appear as the nature of the invention is better understood, the same consists in the novel construction and combination of parts, of a pulley block, as will be hereinafter fully described and claimed.

In the accompanying drawings forming a part of this specification, and in which like characters of reference indicate corresponding arts, Figure 1' is a view in side elevation, part y in section, of a pulley block constructed in accordance with the present invention. Fig. 2 is a view in vertical transverse section through the block.

The pulley block comprises a wooden sheave .1, centered in wh ch is a metallic sleeve 2 that projects at each end beyond the sides of the sheave, a yoke or strap 3, and a pair of check plates 4, the latter also being of wood.

The yoke is, by preference, made of steel and may be of any preferred thickness and width, and has assembled with its crest a swiveled book 5.

The cheek plates 4 are round at their lower ends and are straight at their upper ends, and are of a width to project beyond the periphery of the sheave in order to protect the latter against injury as from blows, or the like.

In order to reduce the space between the cheek plates to a minii'nui'n, and also to strengthen the assemblage with, the meinbers of the latter are rabbeted into the cheek plates and lie flush with the opposed faces thereof, as clearly shown in Fig. 2. 7

To maintain the upper portions of the cheek plates properly spaced apart, and also to prevent inward flexing of the yoke from strains, a spacing block- 6 is provided which, as shown in Fig. 1, extends the entire width of the plates. The check plates are assembled with the yoke and with the spacing block by a plurality of bolts 7, three in this instance being shown, which carry nuts 8 by which the bolts are firmly clamped in position.

The sleeve 2 is carried by a spindle bolt 9 with which is combined a. nut 10 that holds the bolt against disconnecti n from the block. It will be seen by reference to Fig. 2 that the sleeve extends some distance beyond the faces of the sheave, and by this arrangement it will be impossible for the latter to be impinged against either by the yoke members or by the opposed faces of the cheek plates when the nut 10 is tightened, whereby free rotation of the sheave under all conditions will be assured.

The improvements herein defined, while 1 simple in character, will be found thoroughly effective for the purposes designed and will mutually coact in the production of a cheap, light and durable form of pulley block.

I claim:-

1. A pulley block comprising a sheave, a sleeve centered therein and projecting beyond both sides thereof, a yoke straddling the sheave and carrying a swiveled hook, a spacing block disposed Within the yoke adjacent to its crest, cheekplates disposed extcriorly of the yoke and extending beyond the periphery of the sheave, bolts passing through the cheek plates, yoke and spacing block to hold the parts assembled, and a,

spindle bolt passing through the cheek plates and sleeve and embodying means for-locking it in position.

\ 2. A pulley block comprising a sheave, a sleeve centered therein and projecting beyond both sides thereof, a yoke straddling the sheave and carrying a swiveled hook, a spacing block disposed within the yoke adjaof he yoke therci cont to its crest, cheek platesinto which the yoke members are rabbeted and that extend In testimony that I claim the fofegoing as beyond the periphery of the sheave, bolts my own, I have'heretoaffixed my signature passing through the cheek plates, yoke and in the presence of two Witnesses. spacing block to hold the parts assembled, CHARLES I. SCOTT. 5 and a spindle bolt passing through the cheek Witnesses:

lates and sleeve and embodying means for B. P. MOYER, ocking it in position. A. H. COGSWELL.

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