GB659796A - Method and device for transforming waves of audible, ultra-audible or infra-audible frequencies into modulations of an electric current, and conversely - Google Patents

Method and device for transforming waves of audible, ultra-audible or infra-audible frequencies into modulations of an electric current, and conversely

Info

Publication number
GB659796A
GB659796A GB512445A GB512445A GB659796A GB 659796 A GB659796 A GB 659796A GB 512445 A GB512445 A GB 512445A GB 512445 A GB512445 A GB 512445A GB 659796 A GB659796 A GB 659796A
Authority
GB
United Kingdom
Prior art keywords
audible
electrode
modulations
electric current
electrodes
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
GB512445A
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.)
COMPTOIR DES CENDRES ET METAUX
Original Assignee
COMPTOIR DES CENDRES ET METAUX
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 COMPTOIR DES CENDRES ET METAUX filed Critical COMPTOIR DES CENDRES ET METAUX
Priority to GB512445A priority Critical patent/GB659796A/en
Publication of GB659796A publication Critical patent/GB659796A/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
    • H04R23/004—Transducers other than those covered by groups H04R9/00 - H04R21/00 using ionised gas

Landscapes

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

Abstract

659,796. Microphones ; loud - speakers. KLEIN, S., and COMPTOIR DES CENDRES ET METAUX PRECIEUX. March 1, 1945, No. 5124. [Class 40 (iv)] [Also in Group XL (a)] Apparatus for transforming acoustic vibrations into modulations of an electric current or vice versa comprises an electrode 1 emitting positive ions and a co-operating electrode 4, the acoustic vibrations passing through the space between the electrodes and acting on, or being acted on by, the stream of free ions. Electrode 1 may be provided with a heater 3 and the terminals 6 and 7 to be impressed with the electric oscillations are connected across a resistance 6 in series with electrodes 1 and 4. Electrode 4 may be coated with insulating enamel in which case the electrodes 1 and 4 mainly function together as a capacity. The electrode 1 may be a thermionic emitter of positive ions as described in Specification 657,032, [Group XL (a)].
GB512445A 1945-03-01 1945-03-01 Method and device for transforming waves of audible, ultra-audible or infra-audible frequencies into modulations of an electric current, and conversely Expired GB659796A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB512445A GB659796A (en) 1945-03-01 1945-03-01 Method and device for transforming waves of audible, ultra-audible or infra-audible frequencies into modulations of an electric current, and conversely

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB512445A GB659796A (en) 1945-03-01 1945-03-01 Method and device for transforming waves of audible, ultra-audible or infra-audible frequencies into modulations of an electric current, and conversely

Publications (1)

Publication Number Publication Date
GB659796A true GB659796A (en) 1951-10-31

Family

ID=9790159

Family Applications (1)

Application Number Title Priority Date Filing Date
GB512445A Expired GB659796A (en) 1945-03-01 1945-03-01 Method and device for transforming waves of audible, ultra-audible or infra-audible frequencies into modulations of an electric current, and conversely

Country Status (1)

Country Link
GB (1) GB659796A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022385A (en) * 1958-08-25 1962-02-20 Takis N Panay Sound producer
DE2913804A1 (en) * 1978-04-05 1979-10-11 Hill Alan E METHOD AND DEVICE FOR REGULATING A PLASMA
GB2312556A (en) * 1996-04-24 1997-10-29 Carel Martin Grove Variable capacitor using gas discharge

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3022385A (en) * 1958-08-25 1962-02-20 Takis N Panay Sound producer
DE2913804A1 (en) * 1978-04-05 1979-10-11 Hill Alan E METHOD AND DEVICE FOR REGULATING A PLASMA
US4219705A (en) * 1978-04-05 1980-08-26 Hill Alan E Sound production using large volume plasmas
GB2312556A (en) * 1996-04-24 1997-10-29 Carel Martin Grove Variable capacitor using gas discharge
GB2312556B (en) * 1996-04-24 1999-12-22 Carel Martin Grove Variable capacitor
US6097586A (en) * 1996-04-24 2000-08-01 Grove; Carel Martin Variable capacitor

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