GB503100A - Improvements relating to cranes - Google Patents

Improvements relating to cranes

Info

Publication number
GB503100A
GB503100A GB2730337A GB2730337A GB503100A GB 503100 A GB503100 A GB 503100A GB 2730337 A GB2730337 A GB 2730337A GB 2730337 A GB2730337 A GB 2730337A GB 503100 A GB503100 A GB 503100A
Authority
GB
United Kingdom
Prior art keywords
jib
point
flexible member
pulley
lifting
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
GB2730337A
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.)
NORMAN LAINE
Original Assignee
NORMAN LAINE
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 NORMAN LAINE filed Critical NORMAN LAINE
Priority to GB2730337A priority Critical patent/GB503100A/en
Publication of GB503100A publication Critical patent/GB503100A/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

Landscapes

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

Abstract

503,100. Jib cranes. LAINE, N. Oct. 7, 1937, No. 27303. [Class 78 (iv)] In the lover-luffing of cranes, in which a compensating movement is applied to the lifting-rope at or near its driving-point, a flexible member is employed which extends between a point movable with the jib and a curved member on the frame, so that the variation in length from the point on the jib to the point of contact with the curved member is proportional to the necessary compensating movement, such variation being imparted by transmission mechanism to the lifting- gear. Fig. 4 shows one construction in which a flexible member 1, connected to a point a<3> on the jib tail, is passed round a curve formed of rollers 2 on the framing before passing round the guide pulley 3 to differential-gear as set out below. In a modification the rollers 2 are replaced by a pulley under which the rope 1 passes. This pulley 4, Fig. 7, is rotated when the jib is luffed and imparts a compensating movement to the lifting-drum 16 by driving the planet pinions 14 through the gearing 10, 11. The hoisting-drum is connected to the ring 15, and the sun-wheel 18 is fixed during the luffing-operation. Various other modifications are described in which the flexible member engages the. main arm of the jib. Fig. 11 is one example in which the flexible member 1 connected to the jib at a<2> passes over the curved surface represented by the pulley 4. Another modification is suitable for jibs operated by fluid-pressure rams.
GB2730337A 1937-10-07 1937-10-07 Improvements relating to cranes Expired GB503100A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2730337A GB503100A (en) 1937-10-07 1937-10-07 Improvements relating to cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2730337A GB503100A (en) 1937-10-07 1937-10-07 Improvements relating to cranes

Publications (1)

Publication Number Publication Date
GB503100A true GB503100A (en) 1939-03-31

Family

ID=10257376

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2730337A Expired GB503100A (en) 1937-10-07 1937-10-07 Improvements relating to cranes

Country Status (1)

Country Link
GB (1) GB503100A (en)

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