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GB420148A - A method of modulating light for the photo-electric impression of sound on a photo-sensitive surface - Google Patents

A method of modulating light for the photo-electric impression of sound on a photo-sensitive surface

Info

Publication number
GB420148A
GB420148A GB7837/33A GB783733A GB420148A GB 420148 A GB420148 A GB 420148A GB 7837/33 A GB7837/33 A GB 7837/33A GB 783733 A GB783733 A GB 783733A GB 420148 A GB420148 A GB 420148A
Authority
GB
United Kingdom
Prior art keywords
screen
photo
produced
sound
flat beam
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
GB7837/33A
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
Publication of GB420148A publication Critical patent/GB420148A/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

  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

420,148. Optical sound-recording. LAFFON Y SOTO, A., 28, Calle de Almagro, and SELGAS Y MARIN, E. DE, 57, Castellana, both in Madrid. March 15,. 1933, Nos. 7837 and 7838. Convention dates, June 14, 1932 and Jan. 19, 1933. [A Specification was laid open to inspection under Sect. 91 of the Acts, Sept. 24, 1933.] [Class 40 (ii)] A photographic sound record in the form of a set of parallel similar traces of varying width, as shown in Fig. 1, is produced by an apparatus in which a multi-toothed screen is vibrated in accordance with audio-frequency current variations across a stationary flat beam of light ; the screen is connected to an electric conductor to which the audiocurrents are supplied, and which is situated in a magnetic field. The screen may be formed as a single toothed plate, or in two co-operating parts D, E having oppositelydisposed teeth as shown in Fig. 3. As shown diagrammatically in Fig. 4, the vibrations of the screen 5 are preferably produced by connecting it to the moving coil of an instrument 6 of the electrodynamic loud-speaker type. Fig. 4 also shows how the flat beam is formed by projecting light from a lamp 1 through a slit 3, an image of which is produced on the film 8 by means of an optical system 4, 7.
GB7837/33A 1932-06-14 1933-03-15 A method of modulating light for the photo-electric impression of sound on a photo-sensitive surface Expired GB420148A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES420148X 1932-06-14

Publications (1)

Publication Number Publication Date
GB420148A true GB420148A (en) 1934-11-15

Family

ID=8245306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7837/33A Expired GB420148A (en) 1932-06-14 1933-03-15 A method of modulating light for the photo-electric impression of sound on a photo-sensitive surface

Country Status (1)

Country Link
GB (1) GB420148A (en)

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