FR491179A - Transmetteur téléphonique à ventilation thermique - Google Patents

Transmetteur téléphonique à ventilation thermique

Info

Publication number
FR491179A
FR491179A FR491179DA FR491179A FR 491179 A FR491179 A FR 491179A FR 491179D A FR491179D A FR 491179DA FR 491179 A FR491179 A FR 491179A
Authority
FR
France
Prior art keywords
ventilated
thermally
telephone transmitter
telephone
transmitter
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
Alexandre Vaugean
John Rochat
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.)
JOHN ROCHAT
Original Assignee
JOHN ROCHAT
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 JOHN ROCHAT filed Critical JOHN ROCHAT
Application granted granted Critical
Publication of FR491179A publication Critical patent/FR491179A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/022—Cooling arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR491179D 1915-05-15 1915-05-15 Transmetteur téléphonique à ventilation thermique Expired FR491179A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR491179T 1915-05-15

Publications (1)

Publication Number Publication Date
FR491179A true FR491179A (fr) 1919-05-24

Family

ID=1527210

Family Applications (1)

Application Number Title Priority Date Filing Date
FR491179D Expired FR491179A (fr) 1915-05-15 1915-05-15 Transmetteur téléphonique à ventilation thermique

Country Status (1)

Country Link
FR (1) FR491179A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2342614A1 (fr) * 1976-02-24 1977-09-23 Braun Ag Haut-parleur electrodynamique a forte capacite de charge nominale

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2342614A1 (fr) * 1976-02-24 1977-09-23 Braun Ag Haut-parleur electrodynamique a forte capacite de charge nominale

Similar Documents

Publication Publication Date Title
FR480857A (fr) Téléphone thermique
FR480858A (fr) Microphone thermique
FR481479A (fr) Téléphone thermique
AT87347B (de) Lüftungsvorrichtung.
FI6008A (fi) Parannettu ilmanvaihtoventtiili
FR477824A (fr) Réchaud double portatif à gamelles couvertes
CH72605A (de) Jalousiebrettchenbeschlag
CH72344A (de) Kochherd
FR415821A (fr) Couvre-chef à ventilation
DK19850C (da) Kakkelovn.
CH65403A (de) Ventilator
CH72799A (de) Kaminhut
AT63658B (de) Jalousie.
FR23872E (fr) Transmetteur télégraphique
CH69127A (de) Windfachziegel
FR477628A (fr) Embrayages dynamo-électriques
CH71879A (de) Gebäude
DK19942C (da) Ventileringsanordning til Møllesten.
DK28737C (da) David.
DK19838C (da) Varmluftkamin.
ES60809A1 (es) El resultado industrial, abanico con paisaje fotográfico.
FR470780A (fr) Clapet de ventilation
ES59714A1 (es) Aparato con aislamiento térmico.
AT52296B (de) Herdeinsatz mit Feuerkanälen.
CH70570A (de) Neuartiges Gebäude