FR508678A - Improvements to telephone transmitters - Google Patents

Improvements to telephone transmitters

Info

Publication number
FR508678A
FR508678A FR508678DA FR508678A FR 508678 A FR508678 A FR 508678A FR 508678D A FR508678D A FR 508678DA FR 508678 A FR508678 A FR 508678A
Authority
FR
France
Prior art keywords
telephone transmitters
transmitters
telephone
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
French (fr)
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.)
Relay Automatic Telephone Company Ltd
Original Assignee
Relay Automatic Telephone Company Ltd
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 Relay Automatic Telephone Company Ltd filed Critical Relay Automatic Telephone Company Ltd
Application granted granted Critical
Publication of FR508678A publication Critical patent/FR508678A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/14—Throat mountings for microphones

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Telephone Set Structure (AREA)
FR508678D 1919-01-29 1920-01-16 Improvements to telephone transmitters Expired FR508678A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB226919A GB136359A (en) 1919-01-29 1919-01-29 Improvements in or relating to Telephonic Transmitters.

Publications (1)

Publication Number Publication Date
FR508678A true FR508678A (en) 1920-10-20

Family

ID=32669923

Family Applications (1)

Application Number Title Priority Date Filing Date
FR508678D Expired FR508678A (en) 1919-01-29 1920-01-16 Improvements to telephone transmitters

Country Status (3)

Country Link
FR (1) FR508678A (en)
GB (1) GB136359A (en)
NL (1) NL6629C (en)

Also Published As

Publication number Publication date
NL6629C (en)
GB136359A (en) 1919-12-18

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