FR694066A - Appareil de signalisation acoustique - Google Patents

Appareil de signalisation acoustique

Info

Publication number
FR694066A
FR694066A FR694066DA FR694066A FR 694066 A FR694066 A FR 694066A FR 694066D A FR694066D A FR 694066DA FR 694066 A FR694066 A FR 694066A
Authority
FR
France
Prior art keywords
signaling device
acoustic signaling
acoustic
signaling
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.)
TELEPHONIE IND ET COMMERCIALES
Original Assignee
TELEPHONIE IND ET COMMERCIALES
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 TELEPHONIE IND ET COMMERCIALES filed Critical TELEPHONIE IND ET COMMERCIALES
Application granted granted Critical
Publication of FR694066A publication Critical patent/FR694066A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00—Transducers of moving-armature or moving-core type
    • H04R11/14—Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR694066D 1930-04-15 1930-04-15 Appareil de signalisation acoustique Expired FR694066A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR694066T 1930-04-15

Publications (1)

Publication Number Publication Date
FR694066A true FR694066A (fr) 1930-11-28

Family

ID=9043613

Family Applications (1)

Application Number Title Priority Date Filing Date
FR694066D Expired FR694066A (fr) 1930-04-15 1930-04-15 Appareil de signalisation acoustique

Country Status (1)

Country Link
FR (1) FR694066A (fr)

Similar Documents

Publication Publication Date Title
FR711667A (fr) Appareil retardateur électro-acoustique
FR694066A (fr) Appareil de signalisation acoustique
FR692000A (fr) Appareil de désinsection
FR679139A (fr) Perfectionnements aux appareils de signalisation
FR697812A (fr) Appareil de signalisation sous-marine
FR694008A (fr) Appareil de signalisation projetée
FR707120A (fr) Dispositif de signalisation
FR729576A (fr) Appareil de signalisation
FR640785A (fr) Appareil de signalisation acoustique
FR37050E (fr) Appareil de signalisation vol-incendie
FR650603A (fr) Appareil de signalisation
FR653539A (fr) Appareil de signalisation
FR666534A (fr) Appareil de signalisation
FR677320A (fr) Appareil de signalisation vol-incendie
FR38553E (fr) Nouvel appareil signalisateur
FR690187A (fr) Nouvel appareil signalisateur
FR660583A (fr) Appareil de signalisation lumineuse
FR37402E (fr) Appareil de signalisation vol-incendie
FR692100A (fr) Appareil de signalisation
FR667924A (fr) Appareil de signalisation
FR621749A (fr) Appareil de signalisation
FR647077A (fr) Appareil de signalisation
FR642715A (fr) Appareil de signalisation
FR645522A (fr) Appareil de signalisation
FR650642A (fr) Appareil de signalisation