FR635636A - Perfectionnements aux avertisseurs sonores - Google Patents

Perfectionnements aux avertisseurs sonores

Info

Publication number
FR635636A
FR635636A FR635636DA FR635636A FR 635636 A FR635636 A FR 635636A FR 635636D A FR635636D A FR 635636DA FR 635636 A FR635636 A FR 635636A
Authority
FR
France
Prior art keywords
audible warning
warning devices
audible
devices
warning
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
English (en)
Inventor
Paul Falkenstein
Maurice Courtier
Rene Levillain
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 FR635636A publication Critical patent/FR635636A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR635636D 1927-06-08 1927-06-08 Perfectionnements aux avertisseurs sonores Expired FR635636A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR635636T 1927-06-08

Publications (1)

Publication Number Publication Date
FR635636A true FR635636A (fr) 1928-03-20

Family

ID=8994377

Family Applications (1)

Application Number Title Priority Date Filing Date
FR635636D Expired FR635636A (fr) 1927-06-08 1927-06-08 Perfectionnements aux avertisseurs sonores

Country Status (1)

Country Link
FR (1) FR635636A (fr)

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