GB1043864A - Improvements relating to cranes - Google Patents

Improvements relating to cranes

Info

Publication number
GB1043864A
GB1043864A GB2793462A GB2793462A GB1043864A GB 1043864 A GB1043864 A GB 1043864A GB 2793462 A GB2793462 A GB 2793462A GB 2793462 A GB2793462 A GB 2793462A GB 1043864 A GB1043864 A GB 1043864A
Authority
GB
United Kingdom
Prior art keywords
blocks
arrangement
purchase
rope
pulley
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
GB2793462A
Inventor
Robert Morrison
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
Priority to GB2793462A priority Critical patent/GB1043864A/en
Publication of GB1043864A publication Critical patent/GB1043864A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/60—Derricks
    • B66C23/605—Derricks employing ships' masts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

1,043,864. Derricks. J. S. THOMPSON. July 22, 1963 [July 20, 1962], No. 27934/62. Heading B8B. Winch-operated load-handling apparatus has means to alter the effective purchase without re-reeving the rope. In the derrick the slewing arrangement of which is shown pulley-blocks 16 of the snatch-type are mounted at the free end of the jib and pulley blocks 15 are fixed to posts 10. The rope 14 is received between the blocks 15, 16 and passes between drums of winches 12, 13. If all three pulleys of the blocks 15, 16 are in use a six-part purchase results and in order to convert the arrangement to a four-part purchase a rope loop is removed from a pulley of the snatch block 16 and passed round a fixed snatch block 20. To reduce the arrangement to a twopart purchase a second loop is passed round a second fixed snatch block 20. The arrangement can be used for horizontal load-handling.
GB2793462A 1962-07-20 1962-07-20 Improvements relating to cranes Expired GB1043864A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2793462A GB1043864A (en) 1962-07-20 1962-07-20 Improvements relating to cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2793462A GB1043864A (en) 1962-07-20 1962-07-20 Improvements relating to cranes

Publications (1)

Publication Number Publication Date
GB1043864A true GB1043864A (en) 1966-09-28

Family

ID=10267635

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2793462A Expired GB1043864A (en) 1962-07-20 1962-07-20 Improvements relating to cranes

Country Status (1)

Country Link
GB (1) GB1043864A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103641002A (en) * 2013-12-11 2014-03-19 徐工集团工程机械股份有限公司 Assembling device and method of variable-amplitude pulley block

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103641002A (en) * 2013-12-11 2014-03-19 徐工集团工程机械股份有限公司 Assembling device and method of variable-amplitude pulley block
CN103641002B (en) * 2013-12-11 2015-12-09 徐工集团工程机械股份有限公司 Luffing assembly pulley assembling device and method

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