FR509470A - Improvements to alarm devices - Google Patents

Improvements to alarm devices

Info

Publication number
FR509470A
FR509470A FR509470A FR509470DA FR509470A FR 509470 A FR509470 A FR 509470A FR 509470 A FR509470 A FR 509470A FR 509470D A FR509470D A FR 509470DA FR 509470 A FR509470 A FR 509470A
Authority
FR
France
Prior art keywords
alarm devices
alarm
devices
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
FR509470A
Other languages
French (fr)
Inventor
Johan Oscar Attaque
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
Application granted granted Critical
Publication of FR509470A publication Critical patent/FR509470A/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
    • G08B13/06—Mechanical actuation by tampering with fastening

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR509470A 1917-12-08 1920-01-16 Improvements to alarm devices Expired FR509470A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE509470X 1917-12-08

Publications (1)

Publication Number Publication Date
FR509470A true FR509470A (en) 1920-11-10

Family

ID=20310940

Family Applications (1)

Application Number Title Priority Date Filing Date
FR509470A Expired FR509470A (en) 1917-12-08 1920-01-16 Improvements to alarm devices

Country Status (1)

Country Link
FR (1) FR509470A (en)

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