GB973817A - Automatic over moment regulator for cranes - Google Patents

Automatic over moment regulator for cranes

Info

Publication number
GB973817A
GB973817A GB2665362A GB2665362A GB973817A GB 973817 A GB973817 A GB 973817A GB 2665362 A GB2665362 A GB 2665362A GB 2665362 A GB2665362 A GB 2665362A GB 973817 A GB973817 A GB 973817A
Authority
GB
United Kingdom
Prior art keywords
switch
trolley
overload
cranes
july
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
GB2665362A
Inventor
Norman Edward Kerridge
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.)
Stothert and Pitt Ltd
Original Assignee
Stothert and Pitt Ltd
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 Stothert and Pitt Ltd filed Critical Stothert and Pitt Ltd
Priority to GB2665362A priority Critical patent/GB973817A/en
Publication of GB973817A publication Critical patent/GB973817A/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)

Abstract

973,817. Indicating overload in cranes. STOTHERT & PITT Ltd. July 11, 1963 [July 11, 1962], No. 26653/62. Heading B8B. An overload indicator has a switch mounted on a member 14, Fig. 1, carried by a rod 12 which is moved by the tension in a hoisting cable and a switch operating member 24 which is moved up and down in Fig. 1 by a screw 26 and pinion 28 driven by the trolley drive mechanism of a boom crane or the luffing mechanism of a jib crane. The switch has three sets of contacts operated sequentially by a cam face 30 to illuminate a warning light when overload is approached, sound an audible signal when it is reached and finally contacts are opened to arrest movement of the trolley and/or hoisting of the load. Cam faces 38, 40 operate switches 42, 44, adjustably located on a rod 46, to stop the trolley at the inner and outer ends of its run. A switch 50 prevents the higher of two lifting speeds being used when a predetermined tension is exceeded. Fig. 3 shows an embodiment which works in a similar manner, the same ref. numerals being used with the suffix a.
GB2665362A 1962-07-11 1962-07-11 Automatic over moment regulator for cranes Expired GB973817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2665362A GB973817A (en) 1962-07-11 1962-07-11 Automatic over moment regulator for cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2665362A GB973817A (en) 1962-07-11 1962-07-11 Automatic over moment regulator for cranes

Publications (1)

Publication Number Publication Date
GB973817A true GB973817A (en) 1964-10-28

Family

ID=10247066

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2665362A Expired GB973817A (en) 1962-07-11 1962-07-11 Automatic over moment regulator for cranes

Country Status (1)

Country Link
GB (1) GB973817A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737888A (en) * 1970-03-17 1973-06-05 Ppm Sa Method of detecting an overstepping of a maximum parameter admissible for the operation of a machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3737888A (en) * 1970-03-17 1973-06-05 Ppm Sa Method of detecting an overstepping of a maximum parameter admissible for the operation of a machine

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