FR701496A - Improvement in signal boards - Google Patents

Improvement in signal boards

Info

Publication number
FR701496A
FR701496A FR701496DA FR701496A FR 701496 A FR701496 A FR 701496A FR 701496D A FR701496D A FR 701496DA FR 701496 A FR701496 A FR 701496A
Authority
FR
France
Prior art keywords
improvement
signal boards
boards
signal
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
Ira Jean Lichter
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 FR701496A publication Critical patent/FR701496A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/36—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Audible And Visible Signals (AREA)
FR701496D 1929-10-01 1930-09-01 Improvement in signal boards Expired FR701496A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US350814XA 1929-10-01 1929-10-01

Publications (1)

Publication Number Publication Date
FR701496A true FR701496A (en) 1931-03-17

Family

ID=21880514

Family Applications (1)

Application Number Title Priority Date Filing Date
FR701496D Expired FR701496A (en) 1929-10-01 1930-09-01 Improvement in signal boards

Country Status (2)

Country Link
FR (1) FR701496A (en)
GB (1) GB350814A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115171325A (en) * 2022-06-30 2022-10-11 帝森克罗德集团有限公司 Automatic alarm electric fire extinguishing controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115171325A (en) * 2022-06-30 2022-10-11 帝森克罗德集团有限公司 Automatic alarm electric fire extinguishing controller
CN115171325B (en) * 2022-06-30 2024-05-14 帝森克罗德集团有限公司 Automatic alarm electric fire extinguishing controller

Also Published As

Publication number Publication date
GB350814A (en) 1931-06-18

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