GB453576A - Improved process of and device for sound recording on films - Google Patents

Improved process of and device for sound recording on films

Info

Publication number
GB453576A
GB453576A GB7599/35A GB759935A GB453576A GB 453576 A GB453576 A GB 453576A GB 7599/35 A GB7599/35 A GB 7599/35A GB 759935 A GB759935 A GB 759935A GB 453576 A GB453576 A GB 453576A
Authority
GB
United Kingdom
Prior art keywords
sound
auxiliary
produce
recorder
blackening
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
GB7599/35A
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.)
ROBERT JOSEPH LEON EUGENE BLAN
Original Assignee
ROBERT JOSEPH LEON EUGENE BLAN
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 ROBERT JOSEPH LEON EUGENE BLAN filed Critical ROBERT JOSEPH LEON EUGENE BLAN
Publication of GB453576A publication Critical patent/GB453576A/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

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

453,576. Sound-recording apparatus; duplicating records. BLANLOEIL, R. J. L. E., 41, Rue de Plaisance, La Garenne-Colombes, Seine, France. March 11, 1935, No. 7599. Convention date, March 23, 1934. [Class 40 (ii)] [See also Group XX] In order to reduce the clear parts of records for " noiseless " reproduction and to avoid the cutting of steep wave - fronts, the " antiground - noise blackening " is systematically advanced by several millimetres relative to the corresponding sound record. Part of the sound currents from the amplifier 21 influences the oscillograph recorder 22, 27 to produce the sound record 10, and part is amplified at 38 and rectified at 41 to produce a current varying with the intensity of the sound, this current influencing the recorder 29, 34 to produce the auxiliary " blackening " 12, the origin of which is displaced as at 35 relative to the origin 36 of the sound record. A photographic reversal step may be used in the development of the master film or of each copy. The Specification as open to inspection under Sect. 91 states that a similar process may be used for re-recording, the auxiliary recorder being controlled by an auxiliary " reading-device " arranged in advance of the main one. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specifications 374,996 and 406,635.
GB7599/35A 1934-03-23 1935-03-11 Improved process of and device for sound recording on films Expired GB453576A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR453576X 1934-03-23

Publications (1)

Publication Number Publication Date
GB453576A true GB453576A (en) 1936-09-11

Family

ID=8901072

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7599/35A Expired GB453576A (en) 1934-03-23 1935-03-11 Improved process of and device for sound recording on films

Country Status (1)

Country Link
GB (1) GB453576A (en)

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