FR686979A - Security alarm for apartment doors - Google Patents

Security alarm for apartment doors

Info

Publication number
FR686979A
FR686979A FR686979DA FR686979A FR 686979 A FR686979 A FR 686979A FR 686979D A FR686979D A FR 686979DA FR 686979 A FR686979 A FR 686979A
Authority
FR
France
Prior art keywords
security alarm
apartment doors
apartment
doors
alarm
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
Other languages
French (fr)
Inventor
Eugene Gourdain
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
Application granted granted Critical
Publication of FR686979A publication Critical patent/FR686979A/en
Expired 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR686979D 1929-12-20 1929-12-20 Security alarm for apartment doors Expired FR686979A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR686979T 1929-12-20

Publications (1)

Publication Number Publication Date
FR686979A true FR686979A (en) 1930-08-01

Family

ID=9025878

Family Applications (1)

Application Number Title Priority Date Filing Date
FR686979D Expired FR686979A (en) 1929-12-20 1929-12-20 Security alarm for apartment doors

Country Status (1)

Country Link
FR (1) FR686979A (en)

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