GB611414A - Improvements in or relating to microphones - Google Patents

Improvements in or relating to microphones

Info

Publication number
GB611414A
GB611414A GB2960745A GB2960745A GB611414A GB 611414 A GB611414 A GB 611414A GB 2960745 A GB2960745 A GB 2960745A GB 2960745 A GB2960745 A GB 2960745A GB 611414 A GB611414 A GB 611414A
Authority
GB
United Kingdom
Prior art keywords
conical
electrode
microphone
fingers
fixed electrode
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
GB2960745A
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.)
EDMUND RAMSEY WIGAN
Original Assignee
EDMUND RAMSEY WIGAN
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 EDMUND RAMSEY WIGAN filed Critical EDMUND RAMSEY WIGAN
Priority to GB2960745A priority Critical patent/GB611414A/en
Publication of GB611414A publication Critical patent/GB611414A/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

611,414. Microphones. WIGAN, E. R. Nov. 6, 1945, No. 29607. [Class 40 (iv)] In a carbon granule microphone in which the granular material surrounds the electrode assembly, a conical moving electrode 8, Fig. 1, formed as part of the diaphragm 2, is embraced by a conical fixed electrode 10 slotted to form spaced fingers 12 and having a cavity 13 at its apex. The granular material may pass between the fingers of the fixed electrode to fill the inter-electrode space in all positions of the microphone, the cavity 13 providing a supply of granules when the microphone is turned on its face. The granules are retained in place by silk washers 14 and are insulated from the metal case 1 and parts of the electrodes other than their opposed conical surfaces by covering such parts with insulating paint. An alternative form of fixed electrode shown in Fig. 2 comprises a hollow cylindrical member with fingers 22 bent down into conical formation.
GB2960745A 1945-11-06 1945-11-06 Improvements in or relating to microphones Expired GB611414A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2960745A GB611414A (en) 1945-11-06 1945-11-06 Improvements in or relating to microphones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2960745A GB611414A (en) 1945-11-06 1945-11-06 Improvements in or relating to microphones

Publications (1)

Publication Number Publication Date
GB611414A true GB611414A (en) 1948-10-29

Family

ID=10294217

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2960745A Expired GB611414A (en) 1945-11-06 1945-11-06 Improvements in or relating to microphones

Country Status (1)

Country Link
GB (1) GB611414A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960998C (en) * 1954-02-26 1957-03-28 Standard Elek K Ag Carbon microphone with movable immersion electrode
US2819351A (en) * 1955-07-21 1958-01-07 Robin Hood Co Microphone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE960998C (en) * 1954-02-26 1957-03-28 Standard Elek K Ag Carbon microphone with movable immersion electrode
US2819351A (en) * 1955-07-21 1958-01-07 Robin Hood Co Microphone

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