US158448A - Improvement in pulley-blocks - Google Patents

Improvement in pulley-blocks Download PDF

Info

Publication number
US158448A
US158448A US158448DA US158448A US 158448 A US158448 A US 158448A US 158448D A US158448D A US 158448DA US 158448 A US158448 A US 158448A
Authority
US
United States
Prior art keywords
block
blocks
pulley
bosses
sheave
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US158448A publication Critical patent/US158448A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66DCAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00Portable or mobile lifting or hauling appliances
    • B66D3/04Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage

Definitions

  • Patentedlan 5,1875.
  • the principal object of my invention is to construct a cheap and durable block for general light purposes, although the prinoipie of Construction may be adapted to those used in hoisting heavy articles as well, because of its simplicity and strength.
  • Figure l is a perspective view of my invetion.
  • Fig. 2 is a longitudnal vertical section of the same through the line of the center of the sheave-axis.
  • a A represent the cheeks of an ordinary wooden block, connected at the ends by separate pieces, or the entire 'block may be made from one piece of wood, and mortised to receive an ordinary wood or iron sheave, B.
  • This sheave is hnng on a metal pin or axle, a, passed through the checks of the block, and terminatng at the outer surface of the same.
  • the important feature of my invention consists in a novel U-shaped bail, O, by which the block maybe Suspended.
  • the arms of this bail are let into the checks of the block fiush, or nearly so, with the surface of the same. From the point b where the arm eters the wood to the center of the block, where it terminates in a circular boss, c, it has a gradual taper on both sdes, being widest where it joins the boss. In the centers of these bosses c c the ends of the pin or axie co terminate, and are stron gly riveted.
  • the bosses c c may be polygonal in form; but I prefer to make them cir'cular, for the reason that it is easier to cut the wood away for their admission in this form than any other.
  • the object in giving taper to the arms of the baii G and providing the bosses o c is, to relieve the pin a of a portion of the strain in lifting.
  • the taper of the arms acts as a dovetail, and the angle formed by the bosses c c with the tapered portions of the arms abuts against the wood of the checks, and assists in supporting the weight.
  • the U-shaped bail C having tapered or flared extremities, with circular or poiygonal bosses c c, to receive the riveted ends of the sheave-axle a, when the said extremities and bosses are embedded into the Wood of the block, nearly or quite flush with the same, substantially in the manner shown, and for the purposes set forth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Holders For Apparel And Elements Relating To Apparel (AREA)

Description

Patentedlan. 5,1875.
W El R, r
Pully-Blocks.
Wfmessem .UNITED STATES PATENT OFFICE.,
JOHN WEIR, OF NEW YORK, N. Y.
IM PRQVEMENT IN PU LLEY-BLOCKS.
Specification forming part of Letters Patent No. 158, 148, dated January 5, 1875; application filed December 12, 1874.
To all whom it may concern:
Be it known that I, JOHN YVEIR, of the city, county, and State of New York, have invented certain Improvements in Pulley Blocks, of which the following is a specification:
The principal object of my invention is to construct a cheap and durable block for general light purposes, although the prinoipie of Construction may be adapted to those used in hoisting heavy articles as well, because of its simplicity and strength.
In the drawings, Figure l is a perspective view of my invetion. Fig. 2 is a longitudnal vertical section of the same through the line of the center of the sheave-axis.
Let A A represent the cheeks of an ordinary wooden block, connected at the ends by separate pieces, or the entire 'block may be made from one piece of wood, and mortised to receive an ordinary wood or iron sheave, B. This sheave is hnng on a metal pin or axle, a, passed through the checks of the block, and terminatng at the outer surface of the same.
The important feature of my invention consists in a novel U-shaped bail, O, by which the block maybe Suspended. The arms of this bail are let into the checks of the block fiush, or nearly so, with the surface of the same. From the point b where the arm eters the wood to the center of the block, where it terminates in a circular boss, c, it has a gradual taper on both sdes, being widest where it joins the boss. In the centers of these bosses c c the ends of the pin or axie co terminate, and are stron gly riveted.
The bosses c c may be polygonal in form; but I prefer to make them cir'cular, for the reason that it is easier to cut the wood away for their admission in this form than any other.
The object in giving taper to the arms of the baii G and providing the bosses o c is, to relieve the pin a of a portion of the strain in lifting. The taper of the arms acts as a dovetail, and the angle formed by the bosses c c with the tapered portions of the arms abuts against the wood of the checks, and assists in supporting the weight.
By permitting the arms of the bail C to extend only to the center of the sheave, or far enough to receive the pin on which the sheave turns, I save nearly one-half of the metal that would be required if a band were passed entireiy around the block in the usual manner.
By riveting the pin a firmly at both ends into the bosses c o the block is firmly braced laterally.
I claim as myinvention 1. The U-shaped bail C, having tapered or fiared extremites, embedded into the Wood of the block, the said extremities reeeiving the riveted ends of the sheave-axle a, substantialiy in the manner shown, and for the purposes specified.
2. The U-shaped bail C, having tapered or flared extremities, with circular or poiygonal bosses c c, to receive the riveted ends of the sheave-axle a, when the said extremities and bosses are embedded into the Wood of the block, nearly or quite flush with the same, substantially in the manner shown, and for the purposes set forth.
In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.
JOHN VVEIR.
Witnesses:
HENRY GONNETT, ARTHUR G. FRASER.
US158448D Improvement in pulley-blocks Expired - Lifetime US158448A (en)

Publications (1)

Publication Number Publication Date
US158448A true US158448A (en) 1875-01-05

Family

ID=2227858

Family Applications (1)

Application Number Title Priority Date Filing Date
US158448D Expired - Lifetime US158448A (en) Improvement in pulley-blocks

Country Status (1)

Country Link
US (1) US158448A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050173688A1 (en) * 2004-02-05 2005-08-11 Giles Smith Pulley Block

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050173688A1 (en) * 2004-02-05 2005-08-11 Giles Smith Pulley Block

Similar Documents

Publication Publication Date Title
US379113A (en) Chaeles james hibbeed
US158448A (en) Improvement in pulley-blocks
US594644A (en) George t
US1411733A (en) Hoist
USRE7444E (en) Improvement in pulley-blocks
US180342A (en) Improvement in pulley-blocks
US312682A (en) Pulley
US179126A (en) Improvement in block-frames
US591446A (en) Sail-slide
US128700A (en) Improvement in tackle-blocks
US884472A (en) Sash-balance.
US807994A (en) Pulley.
US241703A (en) Pulley-block
US179239A (en) Improvement in pulley-blocks
US529028A (en) Pulley
US984898A (en) Derrick.
US128590A (en) Improvement in barn-door hangers
US901144A (en) Sheave-block.
US534823A (en) Pulley-shell
US663905A (en) Pulley-block.
US242965A (en) Pulley-block
US504928A (en) Self-tripping pulley-block
US201612A (en) Improvement in self-binding pulley-blocks
US1462630A (en) Brown e
US588309A (en) George agobian