GB946162A - Permanent magnet lifting device - Google Patents

Permanent magnet lifting device

Info

Publication number
GB946162A
GB946162A GB4009261A GB4009261A GB946162A GB 946162 A GB946162 A GB 946162A GB 4009261 A GB4009261 A GB 4009261A GB 4009261 A GB4009261 A GB 4009261A GB 946162 A GB946162 A GB 946162A
Authority
GB
United Kingdom
Prior art keywords
plate
magnet
permanent magnet
arrangement
lifted
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
GB4009261A
Inventor
John Ivor Jones
Spencer Bowman
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.)
Thew Shovel Co
Original Assignee
Thew Shovel Co
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 Thew Shovel Co filed Critical Thew Shovel Co
Priority to GB4009261A priority Critical patent/GB946162A/en
Publication of GB946162A publication Critical patent/GB946162A/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
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/04—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by magnetic means

Abstract

946,162. Magnetic holding devices. THEW SHOVEL CO. Nov. 8, 1961, No. 40062/61. Heading H1P. A permanent magnet lifting device for use with cranes comprises a carrier having a contact plate at the bottom and a permanent magnet which is movable bodily towards or away from the contact plate between a position in which the magnetic field at the underside of the contact plate is effective to support a load of ferromagnetic material against the plate and a position in which the field at the plate is reduced to a value at which the load is released. In the arrangement shown in Fig. 1, a carrier suspended from a chain 9 is provided with a non-magnetic base-plate 2 having a central recess within which a permanent magnet 10 is fitted, vertical holes in the magnet fitting around posts 4 projecting upwardly from the recess. In order to release material magnetically attached to the lower surface of the plate 2, the magnet is lifted away from the plate 2 by means of a cable 16 which when withdrawn acts through ring 17 and cable 15 to cause pivoted links 11 to rotate and so lift the magnet 10. The links 11 are so shaped, Fig. 2 (not shown), that the initial breaking force is greater than that subsequently applied. In a second arrangement, Fig. 3 (not shown), the magnet is lifted hydraulically and in a third arrangement, Figs. 4-6 (not shown), it is lifted by a block and pulley system.
GB4009261A 1961-11-08 1961-11-08 Permanent magnet lifting device Expired GB946162A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4009261A GB946162A (en) 1961-11-08 1961-11-08 Permanent magnet lifting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4009261A GB946162A (en) 1961-11-08 1961-11-08 Permanent magnet lifting device

Publications (1)

Publication Number Publication Date
GB946162A true GB946162A (en) 1964-01-08

Family

ID=31503877

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4009261A Expired GB946162A (en) 1961-11-08 1961-11-08 Permanent magnet lifting device

Country Status (1)

Country Link
GB (1) GB946162A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306054A (en) * 1995-07-11 1997-04-23 Christopher John Boxall Magnetic lifting devices
ITMI20101323A1 (en) * 2010-07-16 2012-01-17 Tecnomagnete Spa EQUIPMENT FOR WORKING A RING
CN109704183A (en) * 2019-01-21 2019-05-03 长春大学 Double-driving hoisting permanent magnet

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2306054A (en) * 1995-07-11 1997-04-23 Christopher John Boxall Magnetic lifting devices
GB2306054B (en) * 1995-07-11 1999-11-03 Christopher John Boxall Magnetic device for recovery of submerged articles
ITMI20101323A1 (en) * 2010-07-16 2012-01-17 Tecnomagnete Spa EQUIPMENT FOR WORKING A RING
CN109704183A (en) * 2019-01-21 2019-05-03 长春大学 Double-driving hoisting permanent magnet

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