GB884726A - Improvements relating to electro-magnetic devices - Google Patents

Improvements relating to electro-magnetic devices

Info

Publication number
GB884726A
GB884726A GB3723257A GB3723257A GB884726A GB 884726 A GB884726 A GB 884726A GB 3723257 A GB3723257 A GB 3723257A GB 3723257 A GB3723257 A GB 3723257A GB 884726 A GB884726 A GB 884726A
Authority
GB
United Kingdom
Prior art keywords
armature
core
spiders
nov
magnet
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
GB3723257A
Inventor
Alfred Alexander Robinson
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.)
English Electric Co Ltd
Original Assignee
English Electric 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 English Electric Co Ltd filed Critical English Electric Co Ltd
Priority to GB3723257A priority Critical patent/GB884726A/en
Publication of GB884726A publication Critical patent/GB884726A/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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding
    • H01F7/1646—Armatures or stationary parts of magnetic circuit having permanent magnet
    • 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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F2007/1676—Means for avoiding or reducing eddy currents in the magnetic circuit, e.g. radial slots
    • 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
    • H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
    • H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

884,726. Electromagnets; magnets. ENGLISH ELECTRIC CO. Ltd. Nov. 27, 1958 [Nov. 29, 1957], No. 37232/57. Class 35. A bi-stable magnetic actuator comprises a tubular permanent or electromagnet 1 with pole pieces 2, 3 which, with a core 4, define annular air gaps in which are arranged coils 6, 7. One or other of the air gaps is bridged by one of two soft iron armature discs 12, 13 which are connected by a spindle 14 and supported by flexible spiders or diaphragms 20 for axial movement. The armature is maintained in either of its two stable bridging positions by the flux due to magnet 1, and change over is initiated by a D.C. pulse through the coils in a direction that weakens the flux at the bridged end while strengthening it at the other. The core 4 has a non-magnetic spacing piece 5 shrunk on it, while the magnet and the spiders 20 are clamped between spacing rings 8, 9 by screwed end caps 11. The core, the pole pieces and the armature have radial slots to reduce eddy currents which would slow the movement of the armature.
GB3723257A 1957-11-29 1957-11-29 Improvements relating to electro-magnetic devices Expired GB884726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3723257A GB884726A (en) 1957-11-29 1957-11-29 Improvements relating to electro-magnetic devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3723257A GB884726A (en) 1957-11-29 1957-11-29 Improvements relating to electro-magnetic devices

Publications (1)

Publication Number Publication Date
GB884726A true GB884726A (en) 1961-12-13

Family

ID=10394829

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3723257A Expired GB884726A (en) 1957-11-29 1957-11-29 Improvements relating to electro-magnetic devices

Country Status (1)

Country Link
GB (1) GB884726A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3402768A1 (en) * 1984-01-27 1985-08-01 Thyssen Edelstahlwerke Ag Bistable magnetic actuating element
FR2626711A1 (en) * 1988-02-01 1989-08-04 Koehler Gerard DC electromagnet in the form of a pot, with two air gaps having large surface areas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3402768A1 (en) * 1984-01-27 1985-08-01 Thyssen Edelstahlwerke Ag Bistable magnetic actuating element
FR2626711A1 (en) * 1988-02-01 1989-08-04 Koehler Gerard DC electromagnet in the form of a pot, with two air gaps having large surface areas

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