FR818193A - Alarm device, especially for warning in case of air attack - Google Patents

Alarm device, especially for warning in case of air attack

Info

Publication number
FR818193A
FR818193A FR818193DA FR818193A FR 818193 A FR818193 A FR 818193A FR 818193D A FR818193D A FR 818193DA FR 818193 A FR818193 A FR 818193A
Authority
FR
France
Prior art keywords
warning
case
alarm device
air attack
attack
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
Ernst Bunzl
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 FR818193A publication Critical patent/FR818193A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B27/00—Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
FR818193D 1936-02-22 1937-02-22 Alarm device, especially for warning in case of air attack Expired FR818193A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT488442X 1936-02-22

Publications (1)

Publication Number Publication Date
FR818193A true FR818193A (en) 1937-09-20

Family

ID=3675082

Family Applications (1)

Application Number Title Priority Date Filing Date
FR818193D Expired FR818193A (en) 1936-02-22 1937-02-22 Alarm device, especially for warning in case of air attack

Country Status (3)

Country Link
BE (1) BE420180A (en)
FR (1) FR818193A (en)
GB (1) GB488442A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709801A (en) * 1952-03-31 1955-05-31 William S Sprague Blackout indicator

Also Published As

Publication number Publication date
GB488442A (en) 1938-07-07
BE420180A (en)

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