GB2008853A - Improvement in magnetic lifting devices - Google Patents

Improvement in magnetic lifting devices

Info

Publication number
GB2008853A
GB2008853A GB7845651A GB7845651A GB2008853A GB 2008853 A GB2008853 A GB 2008853A GB 7845651 A GB7845651 A GB 7845651A GB 7845651 A GB7845651 A GB 7845651A GB 2008853 A GB2008853 A GB 2008853A
Authority
GB
United Kingdom
Prior art keywords
improvement
lifting devices
magnetic
magnetic lifting
seal
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.)
Granted
Application number
GB7845651A
Other versions
GB2008853B (en
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.)
British Steel Corp
Original Assignee
British Steel Corp
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 British Steel Corp filed Critical British Steel Corp
Priority to GB7845651A priority Critical patent/GB2008853B/en
Publication of GB2008853A publication Critical patent/GB2008853A/en
Application granted granted Critical
Publication of GB2008853B publication Critical patent/GB2008853B/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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/04—Means for releasing the attractive force

Abstract

A magnetic lifting device includes spaced permanent magnets 6, 8 having inner like poles and fixed pole pieces 2, 4 for coupling to a load 14. A further pole piece 12 is movable within the space between the magnets 6, 8 to vary the lifting field. A substantially non- magnetic seal 18 prevents detritus entering the device. Detritus which attaches itself to the seal 18 is removed by passing a current ramp through a coil 22 around the movable magnet 12. <IMAGE>
GB7845651A 1977-11-22 1978-11-22 Magnetic lifting devices Expired GB2008853B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7845651A GB2008853B (en) 1977-11-22 1978-11-22 Magnetic lifting devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB4859577 1977-11-22
GB7845651A GB2008853B (en) 1977-11-22 1978-11-22 Magnetic lifting devices

Publications (2)

Publication Number Publication Date
GB2008853A true GB2008853A (en) 1979-06-06
GB2008853B GB2008853B (en) 1982-05-19

Family

ID=26266291

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7845651A Expired GB2008853B (en) 1977-11-22 1978-11-22 Magnetic lifting devices

Country Status (1)

Country Link
GB (1) GB2008853B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20101323A1 (en) * 2010-07-16 2012-01-17 Tecnomagnete Spa EQUIPMENT FOR WORKING A RING
US9067290B2 (en) 2010-05-25 2015-06-30 Ixtur Oy Attaching device, attaching arrangement and method for attaching an object to be worked to a working base

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9067290B2 (en) 2010-05-25 2015-06-30 Ixtur Oy Attaching device, attaching arrangement and method for attaching an object to be worked to a working base
ITMI20101323A1 (en) * 2010-07-16 2012-01-17 Tecnomagnete Spa EQUIPMENT FOR WORKING A RING

Also Published As

Publication number Publication date
GB2008853B (en) 1982-05-19

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19971122