US973177A - Pulley-block. - Google Patents

Description

s. J. & 12w. DAVIS & 0-. MoUREADY.

BULLEY BLOCK. APPLICATION H'Lsn In. 7. 1910.

Patented Oct. 18, 1910.

a sums-sum 1.

7 E INVENTORS.

Pearle 77117611268 8c tnsrrn gEA'EES PATENT @FFHJE.

SPURGEON J. DAVIS, PARLEY W. DAVIS, AND'CLIFFORD MCCREADY, OF EUREKA, CALIFORNIA.

PULLEY-BLOCK.

Application filed January '7, 1910.

To all whom it may concern:

Be it known that we, SPURGEON J. DAVIS, PARLEY W. DAVIS, and Onirrono Mo CREADY, all of Eureka, in the county of Humboldt and State of California, have invented a new and Improved Pulley-Block, of which the following is a specification.

Our invention relates to improvements in pulley blocks and more particularly to blocks used in connection with logging ropes or cables, and it has for its object to provide an improved construction of block of the character stated, simple and economical, and in which the several parts are in the nature of interchangeable duplicates.

Vith other objects in view that will hereinafter appear, our invention consists in certain details of construction and arrangement of parts, that will hereinafter be fully described, specifically pointed out in the appended claims and illustrated in the ac companying drawings, in which:

Figure 1, is a perspective view of the block, the several parts being in their assembled or operative position. Fig. 2, is a similar View that shows the several parts comprising our block, separated. Fig. 3, is a vertical section of the block, the pin or bolt being in side view. Fig. 4, is a view of one face of one of the half sections of the block frame. Fig. 5, is a similar view of the other face of the said section.

In the practical development of our invention, the body of the block is formed of two half sections of like contour and they are especially so designed,they being duplicates,-that should the same side of two blocks become broken the two remaining sides of the said two blocks will form the halves of another complete block.

Each half section AA is in the nature of a flat cast steel side member, the upper end 1 of which is substantially of semi-circular shape and the said side member has an integral pendent leg portion 2, the lower end of which terminates in a hook member 3, the special construction of which is best understood from Fig. 2, from which it will be observed that the said hook is formed by casting body A-A with an inwardly and horizontally disposed right angled extension.

Projected from the upper end 1 of each side plate and in a direction opposite to the leg portion 2, is a hook t with one side of Specification of Letters Patent.

Patented Oct. 18, 1910.

Serial No. 536,793.

its upper end cut away so it will lap or he flatwise against the like cut-away portion 4L0 of the hook member 4, formed on the opposite half section A.

At the axial or midway portion, each section AA has a depressed seat 5 and each seat 5 surrounds an aperture 6, said aperture having stepped or reduced .portions that extend through the bosses 70 formed upon the back wall of the sides of sections AA, as clearly shown in the drawings.

8 designates a fulcrum or pivot pin and it is formed with a central or bearing port-ion whose diameter is practically that of the apertures 6, in which the ends of the said bearing portions seat when the parts are assembled as shown in Fig. 3. The pin 8 has its ends 80 reduced to extend through the aperture portions and the said ends are threaded to receive clamp nuts 9 that hold the several parts assembled when in use. In order to keep the pin 8 from turning, the seat 6 has squared portions 6" to receive similar squared surfaces 81 upon the pin 8.

82 designates oil channels that keep the sheave 10 properly lubricated when filled with oil.

10 designates a sheave preferably of white metal and it is mounted on the in 8 between the side plates A.A, its en s 10* fitting the pockets formed therefor in the said side plates AA. A lug 11 is also cast on each of the side members AA on the inner face thereof and in the longitudinal line of the said plates.

From the foregoing description, taken in connection with the drawings, the complete construction and the manner in which the several parts may be quickly assembled for use will be readily apparent.

By reason of forming the two half sections with hook portions, shaped up as shown, when the said members AA are clamped up the two hook members are brought into a close contact, the said two members then makinga perfect hook or yoke, and since the two lugs l1--11 on the opposing sections A-A are now also abut-ting and close the space between the two half sections or plates, they provide, as it were, a bridge or keeper at a point just above the sheave rim which prevents the running cable from becoming displaced or letting it drop back into the hook end of the block.

Another and advantageous feature of our invention, is that since the lower or legmembers each have an angular projection that interlocks when the plates are clamped together, the two side members that form the block become interlocked and braced at their diametrically opposite ends, thereby causing the said sides AA to be firmly clamped together and held from rattling when the clamp nuts 11 are applied to the opposite threaded ends of the pin 10 upon which the sheave turns.

The two side members being exact duplicates, it is obvious that should the same sides of two blocks become broken, the two remaining sides or halves of the two broken blocks can be readily connected to form another and complete block.

Having thus described our invention, what we claim and desire to protect by Letters Patent, is

1. A pulley block comprising two opposing half sections each of which includes a body having an axial socket and aperture and a segmental portion, each of the segmental portions including an inwardly projecting flange, a radial projection extending from each segmental portion that is flattened and forms a hook portion, said hook portion being projected in the plane of the axial line of the journal for the block, the axial journal having reduced and non circular portions for engaging the sockets and the apertures in the pulley block body sections, a lug projected inwardly from each half section at a point below the hook extensions, the lower ends of each of the body sections terminating in a socket and a lug for interlocking with each other, a sheave mounted on the journal and means for clamping the two sections on the journal over the sheave.

2. In a pulley block, a sheave having laterally extended hub portions, an axial journal therefor having reduced and threaded end extensions, opposite side plates having reduced bearing apertures for the threaded journal extensions annular seats for the ends of the large diameter portion of the journals and other annular seats for the laterally extended port-ions of the sheave hubs, and clamp nuts for engaging the threaded journal end, the said side plates having hook extensions at one end that lap each other and interlocking lug portions at the other end.

SPURGEON J. DAVIS. PARLEY W. DAVIS. CLIFFORD MOCREADY.

lVit-nesses J. P. HAWKINS, ODEN E. SMITH.

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