GB454644A - Improvements in or relating to electro-magnets - Google Patents

Improvements in or relating to electro-magnets

Info

Publication number
GB454644A
GB454644A GB3719934A GB3719934A GB454644A GB 454644 A GB454644 A GB 454644A GB 3719934 A GB3719934 A GB 3719934A GB 3719934 A GB3719934 A GB 3719934A GB 454644 A GB454644 A GB 454644A
Authority
GB
United Kingdom
Prior art keywords
current
main
fed
displaced
winding
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
GB3719934A
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 Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB3719934A priority Critical patent/GB454644A/en
Publication of GB454644A publication Critical patent/GB454644A/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
    • H01F7/10—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current
    • H01F7/12—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

454,644. Electromagnets. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London. Dec. 28, 1934, No. 37199. Void [Abridged as open to inspection under Sect. 91 of the Acts, June 29, 1935]. Application for addition to 430,883. [Class 35] [See also Group XXXVII] In an electromagnet as described in the parent Specification, particularly for an alternative-current contactor, the auxiliary holding winding 4 located in slots or grooves in magnet polepieces is excited by alternating current displaced in phase relatively to the current in the main operating coil 3. As shown, the auxiliary winding is fed from the main source 6 with the interposition of a series resistance 7. Alternatively, the auxiliary winding may comprise a number of coils fed by phase displaced alternating currents in which case the main coil may be put out of action when the armature 2 is in the attracted position.
GB3719934A 1934-12-28 1934-12-28 Improvements in or relating to electro-magnets Expired GB454644A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3719934A GB454644A (en) 1934-12-28 1934-12-28 Improvements in or relating to electro-magnets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3719934A GB454644A (en) 1934-12-28 1934-12-28 Improvements in or relating to electro-magnets

Publications (1)

Publication Number Publication Date
GB454644A true GB454644A (en) 1935-06-29

Family

ID=10394583

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3719934A Expired GB454644A (en) 1934-12-28 1934-12-28 Improvements in or relating to electro-magnets

Country Status (1)

Country Link
GB (1) GB454644A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2406429A1 (en) * 1974-02-11 1976-03-18 Maschf Augsburg Nuernberg Ag Electromagnet with excitation coil system - has two or more pole pieces in conjunction with movable armature fitted between them

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2406429A1 (en) * 1974-02-11 1976-03-18 Maschf Augsburg Nuernberg Ag Electromagnet with excitation coil system - has two or more pole pieces in conjunction with movable armature fitted between them
US4166261A (en) * 1974-02-11 1979-08-28 Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft Electromagnet having a movable armature and a plurality of energizing sources

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