GB2265050B - Presence sensor for detecting closed door conditions with tamper resistance - Google Patents

Presence sensor for detecting closed door conditions with tamper resistance

Info

Publication number
GB2265050B
GB2265050B GB9204835A GB9204835A GB2265050B GB 2265050 B GB2265050 B GB 2265050B GB 9204835 A GB9204835 A GB 9204835A GB 9204835 A GB9204835 A GB 9204835A GB 2265050 B GB2265050 B GB 2265050B
Authority
GB
United Kingdom
Prior art keywords
presence sensor
closed door
tamper resistance
detecting closed
door conditions
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 - Fee Related
Application number
GB9204835A
Other versions
GB2265050A (en
GB9204835D0 (en
Inventor
Walter Wilson Hugh Clarke
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9204835A priority Critical patent/GB2265050B/en
Publication of GB9204835D0 publication Critical patent/GB9204835D0/en
Publication of GB2265050A publication Critical patent/GB2265050A/en
Application granted granted Critical
Publication of GB2265050B publication Critical patent/GB2265050B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • H01H36/0073—Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by relative movement between two magnets

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
GB9204835A 1992-03-06 1992-03-06 Presence sensor for detecting closed door conditions with tamper resistance Expired - Fee Related GB2265050B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9204835A GB2265050B (en) 1992-03-06 1992-03-06 Presence sensor for detecting closed door conditions with tamper resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9204835A GB2265050B (en) 1992-03-06 1992-03-06 Presence sensor for detecting closed door conditions with tamper resistance

Publications (3)

Publication Number Publication Date
GB9204835D0 GB9204835D0 (en) 1992-04-22
GB2265050A GB2265050A (en) 1993-09-15
GB2265050B true GB2265050B (en) 1995-09-06

Family

ID=10711588

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9204835A Expired - Fee Related GB2265050B (en) 1992-03-06 1992-03-06 Presence sensor for detecting closed door conditions with tamper resistance

Country Status (1)

Country Link
GB (1) GB2265050B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1390276A (en) * 1971-07-29 1975-04-09 Hobart Corp Magnetic switch control and interlock system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1390276A (en) * 1971-07-29 1975-04-09 Hobart Corp Magnetic switch control and interlock system

Also Published As

Publication number Publication date
GB2265050A (en) 1993-09-15
GB9204835D0 (en) 1992-04-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970306