GB373702A - Improvements in jib cranes - Google Patents

Improvements in jib cranes

Info

Publication number
GB373702A
GB373702A GB877531A GB877531A GB373702A GB 373702 A GB373702 A GB 373702A GB 877531 A GB877531 A GB 877531A GB 877531 A GB877531 A GB 877531A GB 373702 A GB373702 A GB 373702A
Authority
GB
United Kingdom
Prior art keywords
cam
jib
cranes
pivoted
rope
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
GB877531A
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 GB877531A priority Critical patent/GB373702A/en
Publication of GB373702A publication Critical patent/GB373702A/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
    • B66C23/88—Safety gear
    • B66C23/90—Devices for indicating or limiting lifting moment

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

373,702. Jib cranes. BAKER, G., Greno House, Swinton, near Rotherham. March 21, 1931, No. 8775. [Class 78 (iv).] A safe-load indicating device for cranes has the luffing rope connected to a pivoted cam G which is loaded by means of a spring I or a steelyard. The luffing rope T<1> passes from the drum D over a pulley F on the jib Bl to the cam G pivoted at H, the rope being wrapped round the cam and fixed to it at X. The cam contour is such that the moment of the pull about the cam pivot is constant or approximately constant for all safe load positions of the jib. The cam carries an indicating pointer J. An audible warning device or a trip switch may be fitted.
GB877531A 1931-03-21 1931-03-21 Improvements in jib cranes Expired GB373702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB877531A GB373702A (en) 1931-03-21 1931-03-21 Improvements in jib cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB877531A GB373702A (en) 1931-03-21 1931-03-21 Improvements in jib cranes

Publications (1)

Publication Number Publication Date
GB373702A true GB373702A (en) 1932-06-02

Family

ID=9859028

Family Applications (1)

Application Number Title Priority Date Filing Date
GB877531A Expired GB373702A (en) 1931-03-21 1931-03-21 Improvements in jib cranes

Country Status (1)

Country Link
GB (1) GB373702A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1180916B (en) * 1961-09-26 1964-11-05 Rheinstahl Union Brueckenbau Overload protection device for jib cranes with jib position that can be changed by means of neck rope pull

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1180916B (en) * 1961-09-26 1964-11-05 Rheinstahl Union Brueckenbau Overload protection device for jib cranes with jib position that can be changed by means of neck rope pull

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