GB190901453A - Improvements in and relating to Pulley Blocks for Raising and Lowering Weights. - Google Patents

Improvements in and relating to Pulley Blocks for Raising and Lowering Weights.

Info

Publication number
GB190901453A
GB190901453A GB190901453DA GB190901453A GB 190901453 A GB190901453 A GB 190901453A GB 190901453D A GB190901453D A GB 190901453DA GB 190901453 A GB190901453 A GB 190901453A
Authority
GB
United Kingdom
Prior art keywords
worm
chain
thimbles
suspended
load
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
Application number
Inventor
Allan Ferguson Cameron
William Munro Green
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB190901453A publication Critical patent/GB190901453A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/12—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable
    • B66D3/16—Chain or like hand-operated tackles with or without power transmission gearing between operating member and lifting rope, chain or cable operated by an endless chain passing over a pulley or a sprocket

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transmissions By Endless Flexible Members (AREA)

Abstract

1453. Cameron, A. F., and Green, W. M. Jan. 21. Geared pulley-hoists; brakes; self-sustaining gear.-Relates to two-speed worm-driven pulleyblocks in which the load can be suspended either from one end of the chain or from a loop in the chain, and consists in providing selfsustaining mechanism at each end of the worm shaft so that the load is under automatic control when suspended from either hook. The worm shaft 1, operated by the hand chain-wheel 5, carries at each end a boss 24, in which are fitted radial spring pawls engaging ratchet teeth formed on the inner peripheries of thimbles 20. The outer surfaces of the thimbles are conical and are engaged frictionally with the frame 28 by the end thrust of the worm. One or other of the thimbles acts as a brake according to which hook the load is suspended from. The longitudinal movement of the worm is also under the control of a lever 29 operated by a hand chain. The braking-surface of the thimble may be plane instead of conical, and a hand-controlled lever brake may be provided acting radially against the worm shaft.
GB190901453D 1909-01-21 1909-01-21 Improvements in and relating to Pulley Blocks for Raising and Lowering Weights. Expired GB190901453A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB190901453T 1909-01-21

Publications (1)

Publication Number Publication Date
GB190901453A true GB190901453A (en) 1910-01-21

Family

ID=32441782

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190901453D Expired GB190901453A (en) 1909-01-21 1909-01-21 Improvements in and relating to Pulley Blocks for Raising and Lowering Weights.

Country Status (1)

Country Link
GB (1) GB190901453A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092369A (en) * 1960-01-06 1963-06-04 Duff Norton Co Hand-operated chain hoist
CN108689323A (en) * 2018-08-07 2018-10-23 重庆美和机电有限公司 It is a kind of without underloading Lever Blocks

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092369A (en) * 1960-01-06 1963-06-04 Duff Norton Co Hand-operated chain hoist
CN108689323A (en) * 2018-08-07 2018-10-23 重庆美和机电有限公司 It is a kind of without underloading Lever Blocks
CN108689323B (en) * 2018-08-07 2024-01-23 重庆美和机电有限公司 No-load lever block

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