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GB1259355A - - Google Patents

Info

Publication number
GB1259355A
GB1259355A GB1933769A GB1259355DA GB1259355A GB 1259355 A GB1259355 A GB 1259355A GB 1933769 A GB1933769 A GB 1933769A GB 1259355D A GB1259355D A GB 1259355DA GB 1259355 A GB1259355 A GB 1259355A
Authority
GB
United Kingdom
Prior art keywords
magnetic
contact
screens
contact units
assembly
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
GB1933769A
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 filed Critical
Publication of GB1259355A publication Critical patent/GB1259355A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H36/00—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
    • H01H36/0006—Permanent magnet actuating reed switches
    • H01H36/0013—Permanent magnet actuating reed switches characterised by the co-operation between reed switch and permanent magnet; Magnetic circuits
    • H01H36/002—Actuation by moving ferromagnetic material, switch and magnet being fixed

Landscapes

  • Push-Button Switches (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

1,259,355. Magnetic switches. CREED & CO. Ltd. 16 April, 1969, No. 19337/69. Heading H1N. An assembly of magnetic switches has a polarizing magnet system fixed relative to a plurality of sealed magnetic reed contact units, each of which is associated with a respective coextensive magnetic screen movable to expose one end of the contact unit so as to permit contact operation. As shown, a common permanent magnet 3 acts on any of the contact units 1 when its respective cylindrical screen 4 is moved axially. The screens may be partly supported by the respective contact units and may be selectively moved on operation of keys (not shown) connected by wire or strip to the screens. The common magnet 3 may be replaced by individual magnets or by electromagnets which could be de-energized when the assembly is not in use.
GB1933769A 1969-04-16 1969-04-16 Expired GB1259355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1933769 1969-04-16

Publications (1)

Publication Number Publication Date
GB1259355A true GB1259355A (en) 1972-01-05

Family

ID=10127668

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1933769A Expired GB1259355A (en) 1969-04-16 1969-04-16

Country Status (6)

Country Link
US (1) US3626340A (en)
JP (1) JPS4812706B1 (en)
AU (1) AU1386270A (en)
DE (1) DE2017346A1 (en)
FR (1) FR2043377A5 (en)
GB (1) GB1259355A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3993988A (en) * 1975-06-02 1976-11-23 Walter John W Intrusion detection apparatus to signal movement of a partition
US5929731A (en) * 1996-05-08 1999-07-27 Jackson Research, Inc. Balanced magnetic proximity switch assembly
US5877664A (en) * 1996-05-08 1999-03-02 Jackson, Jr.; John T. Magnetic proximity switch system
US5874878A (en) * 1997-04-28 1999-02-23 Jackson, Jr.; John T. Magnetic proximity switch system with slide-by anti-defeat machanism

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155792A (en) * 1962-08-07 1964-11-03 Gen Electric Magnetic reed switch device

Also Published As

Publication number Publication date
DE2017346A1 (en) 1970-11-12
US3626340A (en) 1971-12-07
FR2043377A5 (en) 1971-02-12
AU1386270A (en) 1971-10-21
JPS4812706B1 (en) 1973-04-23

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees