GB329328A - Improvements in and relating to diaphragms for use in the recording, or reproduction of sound, or other vibratory motion - Google Patents

Improvements in and relating to diaphragms for use in the recording, or reproduction of sound, or other vibratory motion

Info

Publication number
GB329328A
GB329328A GB585529A GB585529A GB329328A GB 329328 A GB329328 A GB 329328A GB 585529 A GB585529 A GB 585529A GB 585529 A GB585529 A GB 585529A GB 329328 A GB329328 A GB 329328A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
photo
reproduction
sound
recording
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
GB585529A
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
Priority to GB585529A priority Critical patent/GB329328A/en
Publication of GB329328A publication Critical patent/GB329328A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

329,328. Irvine, M. M. Feb. 22, 1929. Diaphragms; transmitters in which a soundcontrolled light-beam acts on a photo-electric element.-A. diaphragm for use in the recording or reproduction of sound or other vibratory motion is provided with one or more circuitous electrically conducting paths formed of electrolytically deposited material. According to one method of forming such a diaphragm, the outline of a spiral coil is drawn and then photographed. The positive print of this photograph is taken on a sheet of electric insulating material, such as glass, mica, celluloid or insulated metal, coated with a sensitizing material such as silver emulsion and copper or other electric conducting material is then electrolytically deposited on the silvered outline of the coil. A second spiral coil may also be deposited on the reverse side of the diaphragm, the two coils being joined at the centre automatically by piercing the diaphragm centrally before depositing the conducting material thereon. The external leads, are soldered or otherwise attached to the outermost coils of the spirals and may be used for supporting or positioning the diaphragm. The diaphragm may be used in microphones or loud-speakers and when the base or diaphragm proper is formed of transparent material it is particularly suitable as a diaphragm or graticule for photo-electric recording or reproduction of sound e.g. as described in Specification 329,320, [Class 40 (ii), Phonographs &c.]. The diaphragm may also be made by a photo-etching process in which case it is completely electroplated, the plating is then coated with a photographic emulsion, then printed to form a spiral line thereon and finally treated in the usual way for photo etching.
GB585529A 1929-02-22 1929-02-22 Improvements in and relating to diaphragms for use in the recording, or reproduction of sound, or other vibratory motion Expired GB329328A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB585529A GB329328A (en) 1929-02-22 1929-02-22 Improvements in and relating to diaphragms for use in the recording, or reproduction of sound, or other vibratory motion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB585529A GB329328A (en) 1929-02-22 1929-02-22 Improvements in and relating to diaphragms for use in the recording, or reproduction of sound, or other vibratory motion

Publications (1)

Publication Number Publication Date
GB329328A true GB329328A (en) 1930-05-13

Family

ID=9803882

Family Applications (1)

Application Number Title Priority Date Filing Date
GB585529A Expired GB329328A (en) 1929-02-22 1929-02-22 Improvements in and relating to diaphragms for use in the recording, or reproduction of sound, or other vibratory motion

Country Status (1)

Country Link
GB (1) GB329328A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538621A (en) * 1945-04-23 1951-01-16 Bell Telephone Labor Inc Electrodynamic transducer and connector therefor
US2791972A (en) * 1951-10-15 1957-05-14 Gilbert Co A C Vibrator excited loud speaker for toys
US3012107A (en) * 1957-03-15 1961-12-05 Electronique & Automatisme Sa Sound powered telephones
US3164686A (en) * 1959-09-21 1965-01-05 Tibbetts Industries Electrodynamic transducer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2538621A (en) * 1945-04-23 1951-01-16 Bell Telephone Labor Inc Electrodynamic transducer and connector therefor
US2791972A (en) * 1951-10-15 1957-05-14 Gilbert Co A C Vibrator excited loud speaker for toys
US3012107A (en) * 1957-03-15 1961-12-05 Electronique & Automatisme Sa Sound powered telephones
US3164686A (en) * 1959-09-21 1965-01-05 Tibbetts Industries Electrodynamic transducer

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