GB191505846A - Improvements in or relating to Thermic Telephones. - Google Patents

Improvements in or relating to Thermic Telephones.

Info

Publication number
GB191505846A
GB191505846A GB191505846DA GB191505846A GB 191505846 A GB191505846 A GB 191505846A GB 191505846D A GB191505846D A GB 191505846DA GB 191505846 A GB191505846 A GB 191505846A
Authority
GB
United Kingdom
Prior art keywords
sound
relating
thermic
rounded
sound chamber
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.)
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 GB191505846A publication Critical patent/GB191505846A/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)
  • Telephone Set Structure (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
GB191505846D 1915-03-17 1915-04-19 Improvements in or relating to Thermic Telephones. Expired GB191505846A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE191505846X 1915-03-17

Publications (1)

Publication Number Publication Date
GB191505846A true GB191505846A (en) 1916-04-19

Family

ID=32668501

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191505846D Expired GB191505846A (en) 1915-03-17 1915-04-19 Improvements in or relating to Thermic Telephones.

Country Status (3)

Country Link
DE (1) DE297449C (de)
GB (1) GB191505846A (de)
NL (1) NL4053C (de)

Also Published As

Publication number Publication date
DE297449C (de)
NL4053C (de)

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