GB203333A - Improvements in and relating to microphones - Google Patents

Improvements in and relating to microphones

Info

Publication number
GB203333A
GB203333A GB21900/23A GB2190023A GB203333A GB 203333 A GB203333 A GB 203333A GB 21900/23 A GB21900/23 A GB 21900/23A GB 2190023 A GB2190023 A GB 2190023A GB 203333 A GB203333 A GB 203333A
Authority
GB
United Kingdom
Prior art keywords
projection
microphones
diaphragm
granules
contact
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
GB21900/23A
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Publication of GB203333A publication Critical patent/GB203333A/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

203,333. Compagnie Franþaise Thomson-Houston. Aug. 30, 1922, [Convention date]. Void [Published under Sect. 91 of the Act]. Microphones. - The diaphragm M of a microphone is provided with a projection A which is always in contact with the granules in any position of the instrument. The projection may be on a carbon electrode secured to the diaphragm. The opposed electrode E may be formed as a cup with an annular edge, with which the granules always remain in contact; or it may be formed with a projection; or both electrodes may be formed with rings projecting towards each other.
GB21900/23A 1922-08-30 1923-08-30 Improvements in and relating to microphones Expired GB203333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR567927T 1922-08-30

Publications (1)

Publication Number Publication Date
GB203333A true GB203333A (en) 1925-01-29

Family

ID=8948131

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21900/23A Expired GB203333A (en) 1922-08-30 1923-08-30 Improvements in and relating to microphones

Country Status (2)

Country Link
FR (1) FR567927A (en)
GB (1) GB203333A (en)

Also Published As

Publication number Publication date
FR567927A (en) 1924-03-12

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