GB402344A - Improvements in or relating to self-stabilising jib-cranes - Google Patents

Improvements in or relating to self-stabilising jib-cranes

Info

Publication number
GB402344A
GB402344A GB1390533A GB1390533A GB402344A GB 402344 A GB402344 A GB 402344A GB 1390533 A GB1390533 A GB 1390533A GB 1390533 A GB1390533 A GB 1390533A GB 402344 A GB402344 A GB 402344A
Authority
GB
United Kingdom
Prior art keywords
jib
counterweight
sheave
load
lever
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
GB1390533A
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 GB1390533A priority Critical patent/GB402344A/en
Publication of GB402344A publication Critical patent/GB402344A/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
    • B66C23/06—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 with jibs mounted for jibbing or luffing movements
    • B66C23/08—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 with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths
    • B66C23/10—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 with jibs mounted for jibbing or luffing movements and adapted to move the loads in predetermined paths the paths being substantially horizontal; Level-luffing jib-cranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0307—Cranes in which it is essential that the load is moving horizontally during the luffing movement of the arm or jib
    • B66C2700/0314—Cranes in which it is essential that the load is moving horizontally during the luffing movement of the arm or jib in combination with the movement of the counterweight

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

402,344. Jib cranes. WATKINS, W. H., 95, Elthorne Avenue, Hanwell, London. May 12, 1933, No. 13905. [Classes 78 (ii) and 78 (iv).] A counterweight a is moved outwards by the pull in the hoisting rope and also by outward luffing of the jib, and the hoisting gear is arranged to run idly if the load to be raised from the ground exceeds a predetermined weight. As shown, the counterweight a, Fig. 1, is on an arm b pivoted at c to a lever d rocked by the jib. The arm b is also connected by links i, lever g, and links k to cranks j, which are geared to the planet-carrier l, Fig. 2, of an epicylic gear between the power shaft o and the hoisting drum. On attempting to lift a load, the planet-carrier l at first rotates without transmitting the drive and the arm b is moved outwards about the pivot c until the counterweight a supports the reaction of the planetcarrier and enables it to transmit the drive, but if the load exceeds the safe maximum for the crane, the planet-carrier will continue its movement without transmitting the drive. If the members b, d, g, i form a parallel-motion linkage, the load-balancing movement of the counterweight is not affected by the luffing, but the links d, i or the lever arms may be unequal. In a modification, Fig. 3, the lever g is pivoted at a point above the jib-pivot, and the fulcrum c for the counterweight a slides in guides in the jib-tail d under the control of a radius link i<1> which may be equal and parallel to the link i. As shown in Fig. 4, the epicyclic drive is omitted and the hoisting rope n is reeved over a sheave v on the jib-axis and a sheave w on the short arm of the counterweight lever b pivoted on the jib-tail, so that the hoisting-gear at first swings the counterweight a outwards until the sheave w is held against further movement. In a modification, Fig. 5 (not shown), the hoisting rope passes from the sheave v to the jib-head and a load-block, back to the sheave wand is anchored on the jib-tail.
GB1390533A 1933-05-12 1933-05-12 Improvements in or relating to self-stabilising jib-cranes Expired GB402344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1390533A GB402344A (en) 1933-05-12 1933-05-12 Improvements in or relating to self-stabilising jib-cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1390533A GB402344A (en) 1933-05-12 1933-05-12 Improvements in or relating to self-stabilising jib-cranes

Publications (1)

Publication Number Publication Date
GB402344A true GB402344A (en) 1933-11-30

Family

ID=10031503

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1390533A Expired GB402344A (en) 1933-05-12 1933-05-12 Improvements in or relating to self-stabilising jib-cranes

Country Status (1)

Country Link
GB (1) GB402344A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1187773B (en) * 1961-08-26 1965-02-25 Artin Artar Dipl Ing Jib crane, preferably a construction crane
DE1263631B (en) * 1958-07-25 1968-03-14 Beteiligungs & Patentverw Gmbh Bucket wheel excavator, stacker or the like.
US3768665A (en) * 1969-07-23 1973-10-30 Gottwald Kg Leo Travelling crane
FR2486050A2 (en) * 1980-07-04 1982-01-08 Buzzichelli Lilian LIFTING APPARATUS COMPRISING A BOOM AND A COUNTERWEIGHT WITH ADJUSTABLE RESPECTIVE POSITIONS
EP0164191A1 (en) * 1984-04-12 1985-12-11 Drg (Uk) Limited Stacker-reclaimer
US4567990A (en) * 1983-08-16 1986-02-04 Bellio Stephen L Self-balancing crane

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1263631B (en) * 1958-07-25 1968-03-14 Beteiligungs & Patentverw Gmbh Bucket wheel excavator, stacker or the like.
DE1187773B (en) * 1961-08-26 1965-02-25 Artin Artar Dipl Ing Jib crane, preferably a construction crane
US3768665A (en) * 1969-07-23 1973-10-30 Gottwald Kg Leo Travelling crane
FR2486050A2 (en) * 1980-07-04 1982-01-08 Buzzichelli Lilian LIFTING APPARATUS COMPRISING A BOOM AND A COUNTERWEIGHT WITH ADJUSTABLE RESPECTIVE POSITIONS
US4567990A (en) * 1983-08-16 1986-02-04 Bellio Stephen L Self-balancing crane
EP0164191A1 (en) * 1984-04-12 1985-12-11 Drg (Uk) Limited Stacker-reclaimer

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