GB756579A - Improvements relating to electromagnets for lifting purposes - Google Patents

Improvements relating to electromagnets for lifting purposes

Info

Publication number
GB756579A
GB756579A GB3405553A GB3405553A GB756579A GB 756579 A GB756579 A GB 756579A GB 3405553 A GB3405553 A GB 3405553A GB 3405553 A GB3405553 A GB 3405553A GB 756579 A GB756579 A GB 756579A
Authority
GB
United Kingdom
Prior art keywords
lifting
magnet
electromagnets
generator
track
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
GB3405553A
Inventor
Stanley Henderson Hannah
William Edward Box
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.)
Electromagnets Ltd
Original Assignee
Electromagnets Ltd
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 Electromagnets Ltd filed Critical Electromagnets Ltd
Priority to GB3405553A priority Critical patent/GB756579A/en
Publication of GB756579A publication Critical patent/GB756579A/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
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

756,579. Supply systems for lifting magnets. ELECTROMAGNETS, Ltd. Oct. 11, 1954 [Dec. 8, 1953], No. 34055/53. Drawings to Specification. Class 38 (4). A lifting magnet is energized directly from a D.C. generator driven by an A.C. motor and provided with a separate exciter which feeds the field of the generator over a manually controlled calibrated multi-step reversing potentiometer, whereby the lifting capacity of the magnet may be determined as required and the polarity of the generator reversed for dropping the load. Spring bias must be overcome in order to move the operating member of the potentiometer into the reversing end of its track, whilst at the other end of the track-at which over-energization of the magnet obtains-movement of the operating member can also only be made against spring bias.
GB3405553A 1953-12-08 1953-12-08 Improvements relating to electromagnets for lifting purposes Expired GB756579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3405553A GB756579A (en) 1953-12-08 1953-12-08 Improvements relating to electromagnets for lifting purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3405553A GB756579A (en) 1953-12-08 1953-12-08 Improvements relating to electromagnets for lifting purposes

Publications (1)

Publication Number Publication Date
GB756579A true GB756579A (en) 1956-09-05

Family

ID=10360801

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3405553A Expired GB756579A (en) 1953-12-08 1953-12-08 Improvements relating to electromagnets for lifting purposes

Country Status (1)

Country Link
GB (1) GB756579A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008121198A1 (en) * 2007-03-29 2008-10-09 Caterpillar Inc. System and method for controlling electromagnet lift power for material handlers

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008121198A1 (en) * 2007-03-29 2008-10-09 Caterpillar Inc. System and method for controlling electromagnet lift power for material handlers

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