ZA725108B - Improvements in or relating to arrangements including means responsive to magnetic flux - Google Patents

Improvements in or relating to arrangements including means responsive to magnetic flux

Info

Publication number
ZA725108B
ZA725108B ZA725108A ZA725108A ZA725108B ZA 725108 B ZA725108 B ZA 725108B ZA 725108 A ZA725108 A ZA 725108A ZA 725108 A ZA725108 A ZA 725108A ZA 725108 B ZA725108 B ZA 725108B
Authority
ZA
South Africa
Prior art keywords
relating
magnetic flux
including means
means responsive
arrangements including
Prior art date
Application number
ZA725108A
Other languages
English (en)
Inventor
G Bass
J Middleton
G Moore
Original Assignee
Emi 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 Emi Ltd filed Critical Emi Ltd
Publication of ZA725108B publication Critical patent/ZA725108B/xx

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
    • H01H36/0046—Limit switches, also fail-safe operation or anti-tamper considerations
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/08—Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
ZA725108A 1971-07-27 1972-07-24 Improvements in or relating to arrangements including means responsive to magnetic flux ZA725108B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3508471A GB1396874A (en) 1971-07-27 1971-07-27 Magnetic alarm arrangements

Publications (1)

Publication Number Publication Date
ZA725108B true ZA725108B (en) 1973-04-25

Family

ID=10373612

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA725108A ZA725108B (en) 1971-07-27 1972-07-24 Improvements in or relating to arrangements including means responsive to magnetic flux

Country Status (3)

Country Link
DE (1) DE2237308A1 (de)
GB (1) GB1396874A (de)
ZA (1) ZA725108B (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0021611A1 (de) * 1979-06-08 1981-01-07 GKN Fasteners Limited Sicherheits-Systemsensor
DE3409649C1 (de) * 1984-03-16 1985-11-07 Heinrich 3550 Marburg Sälzer Vorrichtung zur Anzeige der Bewegung und/oder Position einer Absperreinrichtung
DE3632367C1 (de) * 1986-09-24 1988-02-18 Heinrich Saelzer Vorrichtung zur Fernueberwachung der Position und/oder Bewegung einer Absperreinrichtung
DE8701282U1 (de) * 1987-01-27 1987-05-07 Unirollka-Baufertigteile GmbH, 6927 Bad Rappenau Sicherheitsfenster/-Tür
GB2238664B (en) * 1989-12-02 1994-06-22 Powered Showers Plc Flow switch assembly
DE19609363A1 (de) * 1996-03-04 1997-09-11 Helmut Fiedler Drahtlose Alarmanlage
US5874878A (en) * 1997-04-28 1999-02-23 Jackson, Jr.; John T. Magnetic proximity switch system with slide-by anti-defeat machanism
ITPI20080061A1 (it) * 2008-07-15 2010-01-16 Alessandro Colella Perfezionamento di una struttura telaio/infisso predisposta per installazione di sensori di comando

Also Published As

Publication number Publication date
DE2237308A1 (de) 1973-02-08
GB1396874A (en) 1975-06-11

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