GB1187557A - A Lifting Magnet for Sheet-Formed Objects of Magnetisable Material - Google Patents

A Lifting Magnet for Sheet-Formed Objects of Magnetisable Material

Info

Publication number
GB1187557A
GB1187557A GB22934/68A GB2293468A GB1187557A GB 1187557 A GB1187557 A GB 1187557A GB 22934/68 A GB22934/68 A GB 22934/68A GB 2293468 A GB2293468 A GB 2293468A GB 1187557 A GB1187557 A GB 1187557A
Authority
GB
United Kingdom
Prior art keywords
coils
magnetic
polepiece
magnet
load
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
GB22934/68A
Inventor
Jorgen Marcher
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.)
H Nielsen and Son Maskinfabrik AS
Original Assignee
H Nielsen and Son Maskinfabrik AS
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 H Nielsen and Son Maskinfabrik AS filed Critical H Nielsen and Son Maskinfabrik AS
Priority to GB22934/68A priority Critical patent/GB1187557A/en
Priority to DE19691921544 priority patent/DE1921544C3/en
Priority to US820172A priority patent/US3555474A/en
Priority to SE06773/69A priority patent/SE355010B/xx
Priority to ES367702A priority patent/ES367702A1/en
Publication of GB1187557A publication Critical patent/GB1187557A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures
    • H01F7/206—Electromagnets for lifting, handling or transporting of magnetic pieces or material

Abstract

1,187,557. Lifting electromagnets. H. NIELSEN & SON MASKINFABRIK A.S. 14 May, 1968, No. 22934/68. Heading H1P. A lifting electromagnet comprises two magnet coils carried in a yoke having a flat underside with annular polepieces and including an intermediate pole, common to the magnetic circuits of both coils, located between the coils and means being provided for reversing the current in one of the coils. As shown, Fig. 1, the magnet comprises two coils 1, 2 arranged to be independently energized and mounted in a yoke 3 which provides an inner polepiece 5, an outer polepiece 6, and an intermediate polepiece 7 having a magnetic cross-section of approximately one quarter that at each of the inner and outer polepieces. When the coils are energized in the same direction, Fig. 5 (not shown), a large lifting force is provided, the magnetic lines of force passing directly between the outer and inner poles through the load, the field in the intermediate pole being substantially zero. When the coils are energized in opposite directions, the magnetic lines of force pass through the load from both the inner and outer poles to the intermediate pole, the lifting force is reduced and the penetration of the magnetic field into the load is greatly reduced. The magnet may be used to lift a stack of steel sheets or to lift a single sheet from a stack by energizing the coils in the same or in opposite directions respectively.
GB22934/68A 1968-05-14 1968-05-14 A Lifting Magnet for Sheet-Formed Objects of Magnetisable Material Expired GB1187557A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB22934/68A GB1187557A (en) 1968-05-14 1968-05-14 A Lifting Magnet for Sheet-Formed Objects of Magnetisable Material
DE19691921544 DE1921544C3 (en) 1968-05-14 1969-04-26 Lifting magnet for plate-shaped workpieces made of magnetizable material
US820172A US3555474A (en) 1968-05-14 1969-04-29 Lifting magnet for sheet-formed objects of magnetisable material
SE06773/69A SE355010B (en) 1968-05-14 1969-05-13
ES367702A ES367702A1 (en) 1968-05-14 1969-05-14 Lifting magnet for sheet-formed objects of magnetisable material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB22934/68A GB1187557A (en) 1968-05-14 1968-05-14 A Lifting Magnet for Sheet-Formed Objects of Magnetisable Material

Publications (1)

Publication Number Publication Date
GB1187557A true GB1187557A (en) 1970-04-08

Family

ID=10187430

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22934/68A Expired GB1187557A (en) 1968-05-14 1968-05-14 A Lifting Magnet for Sheet-Formed Objects of Magnetisable Material

Country Status (4)

Country Link
US (1) US3555474A (en)
ES (1) ES367702A1 (en)
GB (1) GB1187557A (en)
SE (1) SE355010B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226917A (en) * 1989-01-07 1990-07-11 Dowty Hydraulic Units Ltd "Fast response solenoid"
EP4122866A4 (en) * 2020-05-26 2023-09-27 JFE Steel Corporation Lifting magnet, steel sheet lifting device, and steel sheet conveyance method

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3613565A1 (en) * 1986-04-18 1987-10-22 Mannesmann Ag Load lifting magnet
IT1212127B (en) * 1986-07-28 1989-11-08 Cardone Tecnomagnetica MAGNETOPERMANENT ANCHORAGE EQUIPMENT.
JPH0685631B2 (en) * 1990-03-09 1994-10-26 金沢大学長 Magnetic flux convergence type electromagnetic pump
IT1319065B1 (en) * 2000-10-27 2003-09-23 Sgm Spa ELECTROMAGNET FOR HANDLING OF FERROMAGNETIC SCRAP
US7416653B2 (en) * 2003-12-19 2008-08-26 Shell Oil Company Systems and methods of producing a crude product
ES2301313B1 (en) * 2005-11-25 2009-02-16 Felemamg, S.L. ELECTROIMAN TRIPOLAR OF POLES ADAPTABLE TO THE LOAD WITH POSITIONING OF THE CENTRAL POLES.
EP3486203A1 (en) 2011-05-18 2019-05-22 Hydro-Quebec Ferromagnetic metal ribbon transfer apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2226917A (en) * 1989-01-07 1990-07-11 Dowty Hydraulic Units Ltd "Fast response solenoid"
EP4122866A4 (en) * 2020-05-26 2023-09-27 JFE Steel Corporation Lifting magnet, steel sheet lifting device, and steel sheet conveyance method

Also Published As

Publication number Publication date
US3555474A (en) 1971-01-12
DE1921544B2 (en) 1975-11-13
SE355010B (en) 1973-04-02
ES367702A1 (en) 1971-04-16
DE1921544A1 (en) 1969-11-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee