US1078190A - Pulley-block. - Google Patents

Description

G. FRINK.

PULLEY BLOCK. APPLICATION FILED JUNE 5, 1911;

Patented Nov. 11, 1913.

W/T/VE88E8 I 4 a a I 'IIVVENTOR k/a/d E7274 Wag/mu GERALD, Famine]? SEATTLE, WASHINGTON.

' PULLEY-BL'OCK.

Application filed June 5, 1911. Serial No 631,335.

To all whom it may concern Be it known that I, GERALD FRINK, a citizen of the United States, residing at Seattle, in the county of King and State of Washington, have invented certain new and use ful Improvements in Pulley -Blocks, of which the following is a specification.

This invention relates to pulley blocks and is especially designed for employment as lead-blocks in log-hauling operatlons.

The object of my improvements is the perfecting of the block shell or caslng for the purpose of lessening the wear on the running tackle and permlttmg the attachments thereof such, for example, as the hooks of choker lines to be unobstructedly guided to freely pass over the sheave of the block opening.

The invention is illustrated in the accom-v panying drawings, wherein- Figure 1 is a perspective view of a block embodying my improvements. F1g. 2 1s a view of the same in side elevation. Fig. 3 is a fragmentary transverse vertical section thereof. Fig. 4 is a detail sectional view taken through 4& of Fig. 2. s

The reference numerals 5 designate the block sheave which, as illustrated, is desirably provided with a centrally disposed groove 5 in its circumferentlal recess to better lead a cable or rope centrally about such recess.

The sheave 5 is mounted for rotation on an axle or pin 6 whose ends are rigidly secured in openings provided therefor in the side members 7 of the block shell. Said members are each formed with an annular rim portion 8 which is formed integrally with a diametrically arranged upright bar, or bridge, element 9 connecting the said rim portion above and below the pin 6 and affording the support therefor. Arranged in alinement with its bar element 9, each of the shell members are provided with a pair of upwardly directed ears 10, each such pair being spaced to receive a leg of a link 11 having the shape of an inverted V. The cars 10 are also inclined outwardly to furnish room above the sheave to enable ropeattachments of a certain size to freely pass between the pairs of cars in traveling over the sheave.

As illustrated in the various views, the referred to rim portions 8 of the shell mem- Specification of Letters Patent.

Patented Nov. 11, 1913.

bers are each constructed of a tubular configuration at the top and upon diametrically opposite sides and, except in proximity of the cars 10, the shape of the major portion tubular part 12 of the rim is of a substantially circular shape and of relatively large diameter, as best indicated in Figs. 2 and a. The purpose of such tubular construction is to furnish at the opposing inner side edges of the shell .guide surfaces against which the rope operated on the sheave may be most effectually guided in passing onto or leaving the sheave 5 and without subjecting strains which ordinarily prevail where the rope is not fairly led to the block. A further purpose isto provide rounded edges at the outside of the shell so that any brush or other objects encountered by the block, when dragged through the woods or upon the ground, will ordinarily be diverted by these rounded edges so as not to obstruct its movement.

As represented in Figs. 3 and 4, there is provided at the inside of each of the block members 7, a recess 18 whosefunction is to house the outer edges of the sheave so that the latter cannot become entangled with the rope by reason of its entering the interstices getween the sheave and the shell side memers.

In the manufacture of block-shells having the afore described tubular rim portion there is little more material required than in the blocks hitherto employed in the same or analogous work; but it is believed that where the comparative strength of shells is taken into account the advantage as to weight will be manifest in favor of the hereinbefore described block. Its principal advantage, however, is in means presented for directing the running rope to and through the block and also in the provision of the means for obviating the engagement of brush, etc., when the block is dragged on the ground.

What I claim, is

In a block of the character described, the combination with a sheave, a pin for the sheave, and a shell to which the pin is secured, said shell comprising two members of a substantially circular shape and completely covering the outer peripheral edges of the sheave and each of which is formed with a tubular rim portion extending from above the pin and connected thereto by said pin, saidtnbular portion being of rela- Within andbeing housed by said recesses and the portion of the shell extending below the pin formed of a single thickness.

GERALD FRINK.

bridge-pieces extending above and below tively large diameter and increasing at the upper end thereof, the inner edges'of each Witnesses? shell upon the lower side being recessed,; the PETERSON, outer edges or rims of the sheaves lying H. BARNES.

Copies of this patent. may be obtained for five cents each, by addressing the Commissioner of Patents,

Washi'ngton, DIG.

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