US1111118A - Pulley and block therefor. - Google Patents

Description

H. E. WILLIAMSON.

PULLEY AND BLOCK THEREFOR.

APPLICATION FILED NOV,19,1913.

Patented Sept. 22, 19141 IN VENTOR, Herbert E. lfillmm'son A TTORNE Y THE NORRIS PE'IERS CO PHOYD-LITNQ, wAsHINGmN. n. c

HERBERT wrLLIai/ison, or sex rnanorsco, CALIFORNIA.

PULLEY AND BLOCK THEREFOR.

Specification. of Letters Patent. Application filed November 19, 1913. Serial No. 801,847.

To all whom it may concern,

Be it known that I, HERBERT E. WILLIAM- son, a citizen of the United States, residing at San Francisco, in the county of San Francisco and State of California, have invented new and'useful Improvements. in Pulleys and Blocks Therefor, of which the following is a specification.

The object of the present inventionis to provide a pulley block and pulley especially" adapted for supporting a traveling rope, such as a clothes line, upon which are secured hangers for suspending clothes or other objects, and to greatly reduce the cost of construction of such pulley and block.

In the accompanying drawing, Figure 1 is a side view of the pulley block and pulley therein; Fig. 2 is an axial vertical section thereof; Fig. 3 is a bottom plan view thereof; Fig. 4 is an enlarged sectional view on the line 4 -4i of Fig. 2.

Referring to the drawing, 1, 2 indicate the two parts of my improved pulley block, connected by a central shaft 3, having a head 4: abutting against the outer surface of the part 1, a cotter pin 6, through a hole in the other end of the shaft 8, abutting against the outer surface of the other part 2. The part 1 of the pulley block is provided at the top with a portion 7 extending inwardly and then upwardly and apertured, as shown at 8, for suspending the pulley block from any suitable support, and the part 2 of the pulley block is formed, also at the top, with a lip 9 extending inwardly beneath the inwardly and upwardly extending portion 7, and spaced therefrom a sufficient distance to permit an upwardly and outwardly extending hanger carried by a rope on the pulley to pass between said lip, and extension. The lower portion of the part 1 of the pulley block has an inward extension 11, of which the innermost part 12 extends slightly downward and is of reduced thickness to form a wall 13, and is apertured centrally as shown at 1 1. The other part 2 of the pulley block has at its lower portion an inward extension 16 adapted to rest upon the reduced portion 12 of the extension 11, so that the free edge of said extension 16 abuts against said wall 13, the extension 16 terminating centrally in a hook 17 which can enter said aperture 14;. Said wall 13 has convex projections 18,. and the edge of the extension 16 has concave recesses to recelve said projections, to prevent relative circumferential movement of these extensions 11, 16,. from the two sides of the pulley block, said parts ar e secured together at their lower portions, and

by means of the shaft 3 and the cotter pin 6 they are secured together at their center.

()n the shaft 3 rotates a pulley 21 which is made in two sections, the plane of divi sion of the sections being centrally therebetween and at right angles to the shaft 3. One of said sections has no spokes and the other is formed with a. hub 22 and four spokes 23, and from each of two of said spokes there extends in a general tangential direction, but inclined toward the other section, a lug 24. From the inner side of the rim of said other section there extend two diametrically opposite fingers 26, each finger being inclined to the radius therethrough and also to the other section. When joining the two sections they are first placed together so that each finger enters a quad rantal space toward which a lug 21 of the other section projects, and then the two sections are turned about their axes while maintaining them in contact, so that the outer side of each finger is moved into engagement with the inner side of one of the lugs, in which posit-ion the two sections are held against movement from one another in an axial direction. While the parts are held in this position the pulley is galvanized, in which operation the zinc used for galvanizing enters the interstice between the two adjacent faces of the two sections, and, when the galvanization is complete, it is found that the two sections are united together by the Zinc between them. The advantage of this construction of pulley is that the two separate sections are easier to cast than the whole pulley in a single piece and thus the construction is cheapened.

I claim 1. A pulley block having separable parts of which one has an inward and upward extension terminating in an upwardly extending apertured portion, and the'other has an inwardly extending lip, the edge of which is adjacent to, but spaced from, said extension.

2. A pulley block having separable parts of which one has an inward extension terminating in upwardly extending means for suspending the pulley block, and the other Patented Sept. 22, 1914.

of said parts; By means has an inwardly extending lip, the inner edge of which is adjacent to, but spaced I from, said extension.

3. .A pulley block comprising two separable parts and a shaft connecting them at their centers, said parts having inward extensions havingvintegral parts of which one is apertured' and the other has an integral -.radially extending hook removably extend-V 0f which onehas an inward extension terminatlng 1n upwardly extending means for suspending the pulley block, and the other copies of this patent may be obtained for five cents each by addressing the Commissioner of Eatents,

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edge of which is adjacent to, but spaced ing them at their centers, said parts having inward extensions having integral parts engaging each other and preventing relative rotary movement in either: diree-" tion of the twovparts of the block.

I .In testimony whereof Ihave hereunto set my hand in the presence of two subscribing witnesses.

from, said extension; and ashaft connect- HERBERT WILLIAMSON.

Witnesses FRANCES M. WBIGHT, D. B. RICHARDS.

Washington, D. G.

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