US1406560A

US1406560A - Sheave block

Info

Publication number: US1406560A
Application number: US404584A
Authority: US
Inventors: Houghton Willard
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-08-19
Filing date: 1920-08-19
Publication date: 1922-02-14
Anticipated expiration: 1939-02-14

Description

w. HOUGHTON.

SHEAVE BLOCK.

APPLICATION FILED AUG.I9, I920.

Patented Feb. 14, 1922.

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WILLARD HOUGHTON, F SEATTLE, WASHINGTON.

SHEAVE BLOCK.

Specification of Letters Patent.

Patented Feb. 14, 1922.

Application filed August 19, 1920. Serial No. 404,584.

To (ZZZ-whom it mag concern:

Be it known that I, IVILLARD HoUeH'roN,

' a citizen of the United States, residing at Seattle, in the county of King and State of Tashington, have invented certain new and useful Improvements in Sheave Blocks, of which the following is a specification.

This invention relates to sheave-blocks. The object of my improvements is to produce a block of this character which is especially applicable for use as a snatch-block which should be of light weight, strong, durable, have as few parts as possible and be constructed to obviate any accidental dislodgement of the hauling or hoisting rope.

A further object of the invention is the provision in a block of improved devices for lubricating the sheave through the medium of a series of ducts and grease receptacles which are readily replenished with grease or an equivalent.

The invention consists in the novel construction, arrangement and combination of parts as will be hereinafter described and claimed. a

In the accompanying drawings, Figure 1 is a plan view of a block embodying my invention. Fig. 2 is a similar view, partly in horizontal section, a portion of the upper cheek member broken away, said member being illustrated in its detachable position.

Fig. 3 is a sectional view through 3-8 of Fig. 2, with the upper cheek member, shown separated with respect to the other parts of the block.

Fig. 1 is an edge view of the sheave.

In carrying out the invention, I provide a lower cheek member 5 having an upwardly extending post element 6 which serves as the spindle for a sheave 7 and an upper cheek member 8 which is coupled to said lower cheek member to afford housing for said sheave.

One end of each of said cheek members is of a substantially circular form having a diameter slightly greater than the diameter of the sheave and with its arcuate periphery concentric to the spindle axis. The

other ends

5 and 8 of the respective cheek members are each of a corresponding substantially triangular shape.

Integral with the cheek member 5 and extending upwardly from it near the extremity of the part '5 thereof is a spacing element 9 having an inwardly directedtongue 10 of a length equal to the width of the element 9,

or nearly so.

Integral with the cheek member 8 and extending downwardlytherefrom 1s a spacing element '11 located to have its outer surface- 12 fit against the shoulders 13' of the element 9 when the cheek members are in the operative positions in which they are represented in Fig. 1. The spacing element 11 is moreover provided with a horizontal groove 14 to accommodate the tongue 10 of the element 9. i

The two elements 9 and 11 are of the same widths and the inner side of the element 11 is rounded as at 15 to obviate the chafing of a strain-rope or cable 16 in an eye 16 of which said elements are engaged.

The upper end of the post 6 extends through a bored aperture 17 provided in the cheek member 8, said post and the upper portion of the bore 17 are screw threaded as at 6 and 17 respectively, in such a manner that they will interengage when the cheek piece 8 occupies approximatelythe position in which it is represented by broken lines 8 in Fig. 1 and by full lines in Fig. 2. Said screw threads are furthermoreadapted to have the cheek member 8, when swung about the axis of the post in the direction of arrow A in Fig. 1, screwed down upon the post to enable the groove 14 to receive the tongue 10. The sheave 7is represented I Said sheave is formed to provide in its.

upper face a plurality of grease receptacles 22 which communicate by ducts 28 with journal of the sheave. Inverted cups 24; inserted in the respective receptacles serve as covers for the latter and are removable by a knife blade or the like when the receptacles are to be charged with grease. The post 6 is made hollow to also serve as a grease re ceptacle 26, the same being closed by a screw plug 25. Theoutlet 27 for receptacle 26 extends through that side of the post which is diametrically opposite to the side of the sheave about which the hauling cable 28 passes.

From the foregoing it is apparent that the rope 16 when looped about the cheek elements ments as shown for example in Fig. 2, whereupon the upper cheek member may be swung aroundlnto the position denoted by broken lines 8 in Fig. l to enable the rope 28 to be taken out through the opening thus p.r0-

vided.

By reason of its strong and rigid construction, the facillty of removing the hauling cable or rope, its light weight, and the" impossibility of the block being opened when under strain, the invention is peculiarly adapted for use in logging operations as a snatch block. V

lVhat I claim is,

In a block of the characterdescribed, the

combination with a holding rope, asheave, and aspindle for the sheave, of a frame for said sheave, said frame comprising an upper Signed at Seattle, day ofA'ugust,-1920.

and lower cheek 'membery a' spacing block carried by the extreme forward end of the lowercheek member, said spacing block provided withan inwardly directed tongue, and a spacing block carried by the forward end of the upper cheek member having a groove \VILLARD HOUGHTON. WVitnesses:

PIERRE BARNES;

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