GB191516207A - Improvements in or relating to Telephonic Transmitters. - Google Patents

Improvements in or relating to Telephonic Transmitters.

Info

Publication number
GB191516207A
GB191516207A GB191516207DA GB191516207A GB 191516207 A GB191516207 A GB 191516207A GB 191516207D A GB191516207D A GB 191516207DA GB 191516207 A GB191516207 A GB 191516207A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
relating
transmitters
telephonic transmitters
telephonic
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
Inventor
Edward Alfred Graham
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB191516207A publication Critical patent/GB191516207A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)

Abstract

16,207. Graham, E. A. Nov. 17. Microphones and variable-resistance transmitters.-The secondary diaphragm of a transmitter, or the electrode carried by this diaphragm is provided with a projection h which bears against the main diaphragm a; and the capsule f is mounted on an arm e, the position of which, relative to the diaphragm a, is varied by means of a screw g.
GB191516207D 1915-11-17 1915-11-17 Improvements in or relating to Telephonic Transmitters. Expired GB191516207A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191516207T 1915-11-17

Publications (1)

Publication Number Publication Date
GB191516207A true GB191516207A (en) 1916-09-21

Family

ID=32676521

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191516207D Expired GB191516207A (en) 1915-11-17 1915-11-17 Improvements in or relating to Telephonic Transmitters.

Country Status (1)

Country Link
GB (1) GB191516207A (en)

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