US1085017A - Butt-chain block. - Google Patents

Description

J. W. CARD.

BUTT CHAIN BLOCK.

APPLICATION FILED JAN. 9, 1913,

1,085,017. Patented Jan.20,1914.

COLUMBIA PLANcI PH C0..\"ASHINGTON. D. c.

JOHN W. CARD, OF CLEAR LAKE, WASHINGTON.

BUTT-CHAIN BLOCK.

Specification of Letters Patent.

Application filed January 9, 1913.

Patented J an. 20, 1914. serial No. 741,091.

To all whom it may concern Be it known that I, JOHN IV. Cano, a citi- Zen of the United States, residing at Clear Lake, in the county of Skagit and State of Washington, have invented certain new and useful Improvements in Butt-Chain Blocks, of which the following is a specification.

This invention relates to improvements in butt chain blocks, and has for its object to provide a block, for the use of loggers and for similar purposes which will permit the choker line to pass through the block without becoming detached from the line.

A further object is to provide a link in one side of the block shell which will swing upon its central pivotal support and allow the rope supporting the lug to pass through unobstructed.

Another object is to provide in such a device a link which is pivoted on the central shaft and which swings freely thereon, without leaving engagement with the end portions of the shell.

I accomplish these objects by the mechanism illustrated in the accompanying drawing, in which- Figure l is a horizontal sect-ional view showing the upper portions of the shell removed. Fig. 2 is a longitudinal vertical Seetional view of same.

Referring to the drawing in detail, 18 represents the shell of the block to what may be termed the rear end of which, is secured the yoke 14, by means of the bolts 20. To the front end upon bolts 3, is secured the yoke 10.

In use, the block will be anchored by the cable 15, so that it will lie in the position shown in Fig. 2. If it is desirable to suspend the block above the ground this may be done by means of cable 9 anchored in the yoke l0.

Transversely in the upper member 18, of the shell, is mounted the shaft 13, having the flanged cap 19, and upon its intermediate portion is mounted in the usual manner the roll 4, against the lower end of which, upon the shaft 13 is loosely mounted the disk 6, having the radial arms 6 about its periphery, and secured in place upon the enlarged journal 13a by means of the flanged cap 13b.

To the lower end of yoke 10 upon bolt 3 is secured the lower member 1 of the shell, which is olf-set from its point of union, and extended at 1a to engage upon the lower terminal of the shaft 13, which is extended a sufficient distance for that purpose.

The member 1 has a transverse channel 21 yformed at a point from the central axis, be-

similarly inclined inner face 2a. The lower member may be divided and the end portion united in the usual way to the yoke.

About the disk 6 is formed a plurality of radial arms 6, each having secured therein at a point corresponding to said channels a pin 5, each carrying a roll 7 held in place by the flange 5a, and each having an inclined bearing face 7a conforming to and bearing upon the inclined faces 2 and 2@ of said channels. These arms will be so disposed that two or more of them will at all times lie within the limits of the shell, so that two or more rolls 7 will always bear against the face 2a of the channel 22 to sust-ain the yoke 14.

In operation the main line 8 will be retracted by the engine, drawing with it the haul back line 17 and the choker line 16, which are secured thereto by means of hooks 11 and 12 respectively. The haul back travels over the roll 4, and the choker line, which carries t-he log, drops to the ground. As the log approaches the block, which is always at a curve in the line, the depending choker will engage between two of the radial arms causing the disk Ga to rotate on the axis until it comes into line with the other portion of the main line, when it will leave the arms, thus allowing the log to pass the block without obstruction and without the need of detaching and reattaching the choker line, which is the present practice in logging. In this manner there is formed ample support between the shaft 13 and the yoke 14 to sustain the strain of the anchor 15; and the inclined faces Q. and 2a will sustain the corresponding rolls 7 against lateral displacement.

I-Iaving described my invention, what I claim is- 1. A pulley block having a divided side member, each portion having a transverse, arcuated channel formed about a common center, a shaft journaled in the side members, a disk mounted upon said shaftI and extending beyond said channels, and retaining elements fixed in spaced relation about said disk and engaging in said channels, so as to form a connection between the divided members and permit rotation of the disk.

2. A. pulley block having a divided side member, each portion having a transverse, arcuated channel formed about a common center, a shaft journaled in the side members, a disk mounted upon said shaft and extending beyond said channels, pins fixed transversely in spaced relation about said disk and adapted to extend into said channels, and a roller upon each of said pins adapted to engage the inner face of the channels to connect the divided members and permit rotation of the disk.

3. In a butt chain block, a shell having a divided side member, a shaft mounted therein, a channel formed in the free portion of said side member about said shaft as a center, a disk journaled upon the shaft, arms ter, a disk journaled upon the shaft, arms radially disposed about said disk and extending opposite said channel, a stud secured in each of said arms and adapted to extend into said channel, a roll upon each stud adapted to engage the inner face of the channel, and

means to retain the roll in engagement in the channel.

In testimony whereof I affix my signature in presence of tWo Witnesses.

JOI-IN W. CARD. Witnesses:

Gr. V. MATTER, HAZEL A. ARMSTRONG.

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

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