GB983863A - Improvements in or relating to electromagnetic indicators - Google Patents

Improvements in or relating to electromagnetic indicators

Info

Publication number
GB983863A
GB983863A GB2558760A GB2558760A GB983863A GB 983863 A GB983863 A GB 983863A GB 2558760 A GB2558760 A GB 2558760A GB 2558760 A GB2558760 A GB 2558760A GB 983863 A GB983863 A GB 983863A
Authority
GB
United Kingdom
Prior art keywords
energized
drum
coil
indicator
electromagnet
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
GB2558760A
Inventor
John Spreadborough
William Marshal Ney
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.)
Plessey UK Ltd
Original Assignee
Plessey UK 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 Plessey UK Ltd filed Critical Plessey UK Ltd
Priority to GB2558760A priority Critical patent/GB983863A/en
Publication of GB983863A publication Critical patent/GB983863A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G08B5/30—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with rotating or oscillating members, e.g. vanes

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Braking Arrangements (AREA)

Abstract

983,863. Two position indicators. PLESSEYU.K. Ltd. July 14, 1961 [July 22, 1960], No. 25587/60. Heading G4F. An electromagnetic on-off indicator comprises a permanent magnet 7 carried diametrally on an indicator drum 6 capable only of limited angular movement, a brake being provided to hold the drum in either terminal position until a coil 8 is energized. When the coil 8 is de-energized abrake shoe 13 carried on the free end 12 of an L-shaped leaf spring 10, Fig. 1, is urged into engagementwith one or other of flats 14 on the drum. When the coil is energized, its core 9 magnetically withdraws the shoe 13, and the indicator is rocked to its other terminal position by interaction of the permanent magnet 7 with the poles of the electromagnet at the upper ends of pole arms 16 and the core 9. The electromagnet is energized in the appropriate sense according to the direction of drum movement required.
GB2558760A 1960-07-22 1960-07-22 Improvements in or relating to electromagnetic indicators Expired GB983863A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2558760A GB983863A (en) 1960-07-22 1960-07-22 Improvements in or relating to electromagnetic indicators

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2558760A GB983863A (en) 1960-07-22 1960-07-22 Improvements in or relating to electromagnetic indicators

Publications (1)

Publication Number Publication Date
GB983863A true GB983863A (en) 1965-02-17

Family

ID=10230092

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2558760A Expired GB983863A (en) 1960-07-22 1960-07-22 Improvements in or relating to electromagnetic indicators

Country Status (1)

Country Link
GB (1) GB983863A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2304902A1 (en) * 1975-03-19 1976-10-15 Widens Elautomatik Ab BISTABLE POSITION INDICATOR

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2304902A1 (en) * 1975-03-19 1976-10-15 Widens Elautomatik Ab BISTABLE POSITION INDICATOR

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