GB309930A - An improved method and means for recording or reproducing sound - Google Patents

An improved method and means for recording or reproducing sound

Info

Publication number
GB309930A
GB309930A GB3408827A GB3408827A GB309930A GB 309930 A GB309930 A GB 309930A GB 3408827 A GB3408827 A GB 3408827A GB 3408827 A GB3408827 A GB 3408827A GB 309930 A GB309930 A GB 309930A
Authority
GB
United Kingdom
Prior art keywords
recording
diaphragms
light
sound
improved method
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
GB3408827A
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 GB3408827A priority Critical patent/GB309930A/en
Publication of GB309930A publication Critical patent/GB309930A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

309,930. Neale, J. Dec. 16, 1927. No Patent granted (Sealing fee not paid). Optical apparatus.- A device for recording or transmitting sound by means of an acoustically -influenced beam of light comprises two parallel diaphragms A, B between which the light is passed, the diaphragms having opposed projections E which move laterally across the beam. The diaphragms are mounted in a casing closed at the back and having a sound-receiving portion H. The light passes through diametrically opposed apertures (not shown) having transparent covers, and on emerging falls on a recording film or on lightsensitive members of a Wheatstone bridge device, in conjunction with which a loud-speaker may be used. Specifications 284,942 and 307,086, [both in Class 40 (iii), Telegraphs, Electric], are referred to.
GB3408827A 1927-12-16 1927-12-16 An improved method and means for recording or reproducing sound Expired GB309930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3408827A GB309930A (en) 1927-12-16 1927-12-16 An improved method and means for recording or reproducing sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3408827A GB309930A (en) 1927-12-16 1927-12-16 An improved method and means for recording or reproducing sound

Publications (1)

Publication Number Publication Date
GB309930A true GB309930A (en) 1929-04-16

Family

ID=10361223

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3408827A Expired GB309930A (en) 1927-12-16 1927-12-16 An improved method and means for recording or reproducing sound

Country Status (1)

Country Link
GB (1) GB309930A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195217A (en) * 1986-08-20 1988-03-30 Univ Dundee Acoustic-optic transducer
GB2233467A (en) * 1989-06-26 1991-01-09 Plessey Co Plc An optical microphone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2195217A (en) * 1986-08-20 1988-03-30 Univ Dundee Acoustic-optic transducer
GB2233467A (en) * 1989-06-26 1991-01-09 Plessey Co Plc An optical microphone

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