GB447962A - Improvements in or relating to light valves - Google Patents

Improvements in or relating to light valves

Info

Publication number
GB447962A
GB447962A GB32474/35A GB3247435A GB447962A GB 447962 A GB447962 A GB 447962A GB 32474/35 A GB32474/35 A GB 32474/35A GB 3247435 A GB3247435 A GB 3247435A GB 447962 A GB447962 A GB 447962A
Authority
GB
United Kingdom
Prior art keywords
wire
magnet
bridge piece
sound
nov
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
GB32474/35A
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 GB447962A publication Critical patent/GB447962A/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

  • Toys (AREA)

Abstract

447,962. Optical sound - recording apparatus. BOITEL, A. F., 26, Boulevard de Cambrai, Nizza, France. Nov. 22, 1935, No. 32474. Convention date, Nov. 24, 1934. [Class 40 (ii)] In a light-valve for use in sound recording in which a vibrating wire 11 carrying sound modulated current is disposed between the poles of a horseshoe magnet 16, L-shaped pole pieces 1, 3 separated by blocks of non- magnetic material 2, 4 are so arranged between the magnet poles that the magnetic flux in the range of vibration of the wire runs in a direction at right angles to the plane of the magnet so that the wire vibrates in a plane parallel to that of the magnet. The pole system forms a bridge piece in which the light aperture 6 is formed and on this bridge piece are mounted, so as to be insulated therefrom, plates 7 and 8. The lower end of the wire 11 is secured at 9 to the plate 7 whilst its upper end is attached to one end of a lever 20 pivoted on the plate 8, the other end of the lever being acted on by a screw 21 so as to tension the wire. Within the bridge piece, the wire is gripped above and below the aperture 6 by pairs of damping blocks, two of which are shown at 12 and 14, Fig. 1.
GB32474/35A 1934-11-24 1935-11-22 Improvements in or relating to light valves Expired GB447962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT447962X 1934-11-24

Publications (1)

Publication Number Publication Date
GB447962A true GB447962A (en) 1936-05-28

Family

ID=3674350

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32474/35A Expired GB447962A (en) 1934-11-24 1935-11-22 Improvements in or relating to light valves

Country Status (1)

Country Link
GB (1) GB447962A (en)

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