FR641643A - Detonation alarm for doors - Google Patents

Detonation alarm for doors

Info

Publication number
FR641643A
FR641643A FR641643DA FR641643A FR 641643 A FR641643 A FR 641643A FR 641643D A FR641643D A FR 641643DA FR 641643 A FR641643 A FR 641643A
Authority
FR
France
Prior art keywords
detonation
doors
alarm
detonation 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
Fernand Gay
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 FR641643A publication Critical patent/FR641643A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B15/00—Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR641643D 1927-09-29 1927-09-29 Detonation alarm for doors Expired FR641643A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR641643T 1927-09-29

Publications (1)

Publication Number Publication Date
FR641643A true FR641643A (en) 1928-08-07

Family

ID=8998288

Family Applications (1)

Application Number Title Priority Date Filing Date
FR641643D Expired FR641643A (en) 1927-09-29 1927-09-29 Detonation alarm for doors

Country Status (1)

Country Link
FR (1) FR641643A (en)

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