FR2428127A2 - Key operated lock with bolt and cam contacts - has with electric alarm secondary relay which triggers alarm when door is forced - Google Patents

Key operated lock with bolt and cam contacts - has with electric alarm secondary relay which triggers alarm when door is forced

Info

Publication number
FR2428127A2
FR2428127A2 FR7923662A FR7923662A FR2428127A2 FR 2428127 A2 FR2428127 A2 FR 2428127A2 FR 7923662 A FR7923662 A FR 7923662A FR 7923662 A FR7923662 A FR 7923662A FR 2428127 A2 FR2428127 A2 FR 2428127A2
Authority
FR
France
Prior art keywords
alarm
door
forced
secondary relay
bolt
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.)
Pending
Application number
FR7923662A
Other languages
French (fr)
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 FR7923662A priority Critical patent/FR2428127A2/en
Publication of FR2428127A2 publication Critical patent/FR2428127A2/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B45/00—Alarm locks
    • E05B45/06—Electric alarm locks
    • 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)
  • Lock And Its Accessories (AREA)

Abstract

The electric alarm system monitors a lock whose bolt is released by a key-actuated motorized mechanism including a false key actuated relay circuit which triggers the alarm secondary relay circuit activates the alarm when the door is forced. A sensor which acts when the door opens is used to operate a switch and close the secondary relay circuit, the primary relay operating two changeover switches which simultaneously make and break the alarm and motor circuits respectively. The key, which is a metal electrical conductor, may inc non-conductive sections which act in donjunction with lock contact cams with similar properties.
FR7923662A 1979-09-24 1979-09-24 Key operated lock with bolt and cam contacts - has with electric alarm secondary relay which triggers alarm when door is forced Pending FR2428127A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7923662A FR2428127A2 (en) 1979-09-24 1979-09-24 Key operated lock with bolt and cam contacts - has with electric alarm secondary relay which triggers alarm when door is forced

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7923662A FR2428127A2 (en) 1979-09-24 1979-09-24 Key operated lock with bolt and cam contacts - has with electric alarm secondary relay which triggers alarm when door is forced

Publications (1)

Publication Number Publication Date
FR2428127A2 true FR2428127A2 (en) 1980-01-04

Family

ID=9229934

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7923662A Pending FR2428127A2 (en) 1979-09-24 1979-09-24 Key operated lock with bolt and cam contacts - has with electric alarm secondary relay which triggers alarm when door is forced

Country Status (1)

Country Link
FR (1) FR2428127A2 (en)

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