GB191505837A - A Thermic Microphone. - Google Patents

A Thermic Microphone.

Info

Publication number
GB191505837A
GB191505837A GB191505837DA GB191505837A GB 191505837 A GB191505837 A GB 191505837A GB 191505837D A GB191505837D A GB 191505837DA GB 191505837 A GB191505837 A GB 191505837A
Authority
GB
United Kingdom
Prior art keywords
thermic
microphone
filaments
telephoon
nederlandsche
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
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.)
DE NL THERMO TELEPHOON MIJ NV
Original Assignee
DE NL THERMO TELEPHOON MIJ NV
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 DE NL THERMO TELEPHOON MIJ NV filed Critical DE NL THERMO TELEPHOON MIJ NV
Publication of GB191505837A publication Critical patent/GB191505837A/en
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
    • H04R23/00—Transducers other than those covered by groups H04R9/00 - H04R21/00
    • H04R23/002—Transducers other than those covered by groups H04R9/00 - H04R21/00 using electrothermic-effect transducer

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Catching Or Destruction (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Building Environments (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)

Abstract

5837. Naamlooze Vennootschap de Nederlandsche Thermo - Telephoon Maatschappij. Feb. 11, [Convention date]. Hot-wire transmitters; mouthpieces. - A thermic microphone has the heated filaments arranged in a closed sound-box or in a soundbox formed of two curved surfaces 1, 2 connected by a bolt 5, which supports the filaments 7.
GB191505837D 1915-02-11 1915-04-19 A Thermic Microphone. Expired GB191505837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191505838X 1915-02-11

Publications (1)

Publication Number Publication Date
GB191505837A true GB191505837A (en) 1916-04-19

Family

ID=32668494

Family Applications (2)

Application Number Title Priority Date Filing Date
GB191505837D Expired GB191505837A (en) 1915-02-11 1915-04-19 A Thermic Microphone.
GB191505838D Expired GB191505838A (en) 1915-02-11 1915-04-19 Improvements in or relating to Thermic Telephones.

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB191505838D Expired GB191505838A (en) 1915-02-11 1915-04-19 Improvements in or relating to Thermic Telephones.

Country Status (5)

Country Link
US (1) US1389242A (en)
AT (1) AT76294B (en)
DK (1) DK21413C (en)
FR (1) FR480858A (en)
GB (2) GB191505837A (en)

Also Published As

Publication number Publication date
US1389242A (en) 1921-08-30
GB191505838A (en) 1916-04-19
DK21413C (en) 1916-08-07
FR480858A (en) 1916-10-04
AT76294B (en) 1919-04-25

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