FR403347A - Perfectionnements aux trompettes électriques - Google Patents

Perfectionnements aux trompettes électriques

Info

Publication number
FR403347A
FR403347A FR403347DA FR403347A FR 403347 A FR403347 A FR 403347A FR 403347D A FR403347D A FR 403347DA FR 403347 A FR403347 A FR 403347A
Authority
FR
France
Prior art keywords
trumpet
electric
trumpet improvements
electric trumpet
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)
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.)
TELEPHONES ET TELEGRAPHES DE LYON Ste
Original Assignee
TELEPHONES ET TELEGRAPHES DE LYON Ste
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 TELEPHONES ET TELEGRAPHES DE LYON Ste filed Critical TELEPHONES ET TELEGRAPHES DE LYON Ste
Application granted granted Critical
Publication of FR403347A publication Critical patent/FR403347A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems, e.g. audible personal calling systems
    • G08B3/10—Audible signalling systems, e.g. audible personal calling systems using electric transmission; using electromagnetic transmission

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR403347D 1909-05-25 1909-05-25 Perfectionnements aux trompettes électriques Expired FR403347A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR403347T 1909-05-25

Publications (1)

Publication Number Publication Date
FR403347A true FR403347A (fr) 1909-10-30

Family

ID=1448001

Family Applications (1)

Application Number Title Priority Date Filing Date
FR403347D Expired FR403347A (fr) 1909-05-25 1909-05-25 Perfectionnements aux trompettes électriques

Country Status (1)

Country Link
FR (1) FR403347A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404370A1 (fr) * 1977-09-27 1979-04-20 Siemens Ag Appareil electrique de chauffage comportant un dispositif indicateur acoustique de la fin du processus de chauffage

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404370A1 (fr) * 1977-09-27 1979-04-20 Siemens Ag Appareil electrique de chauffage comportant un dispositif indicateur acoustique de la fin du processus de chauffage

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