GB114418A - Improvements in or relating to Thermic Telephones and Microphones. - Google Patents

Improvements in or relating to Thermic Telephones and Microphones.

Info

Publication number
GB114418A
GB114418A GB2018/18A GB201818A GB114418A GB 114418 A GB114418 A GB 114418A GB 2018/18 A GB2018/18 A GB 2018/18A GB 201818 A GB201818 A GB 201818A GB 114418 A GB114418 A GB 114418A
Authority
GB
United Kingdom
Prior art keywords
microphones
relating
receivers
hot
thermic
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
GB2018/18A
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.)
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 GB114418A publication Critical patent/GB114418A/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)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Communication Cables (AREA)
GB2018/18A 1917-03-27 1918-02-04 Improvements in or relating to Thermic Telephones and Microphones. Expired GB114418A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL114418X 1917-03-27

Publications (1)

Publication Number Publication Date
GB114418A true GB114418A (en) 1918-04-18

Family

ID=32294140

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2018/18A Expired GB114418A (en) 1917-03-27 1918-02-04 Improvements in or relating to Thermic Telephones and Microphones.

Country Status (4)

Country Link
DE (1) DE314664C (enExample)
FR (1) FR488967A (enExample)
GB (1) GB114418A (enExample)
NL (1) NL3740C (enExample)

Also Published As

Publication number Publication date
FR488967A (fr) 1918-12-03
NL3740C (enExample)
DE314664C (enExample)

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