GB417645A - Improvements in or relating to photographically copying sound records - Google Patents

Improvements in or relating to photographically copying sound records

Info

Publication number
GB417645A
GB417645A GB23463/34A GB2346334A GB417645A GB 417645 A GB417645 A GB 417645A GB 23463/34 A GB23463/34 A GB 23463/34A GB 2346334 A GB2346334 A GB 2346334A GB 417645 A GB417645 A GB 417645A
Authority
GB
United Kingdom
Prior art keywords
lens
groove
film
copying
soc
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
GB23463/34A
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.)
RECH IND FRANCAISE R I F SOC D
Original Assignee
RECH IND FRANCAISE R I F SOC D
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 RECH IND FRANCAISE R I F SOC D filed Critical RECH IND FRANCAISE R I F SOC D
Publication of GB417645A publication Critical patent/GB417645A/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
    • G11B7/28—Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers

Landscapes

  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

417,645. Photographically copying sound records. SOC. RECHERCHE INDUSTRIELLE FRANCAISE (R.I.F.) SOC. D'ETUDES POUR L'EXPLOITATION DES BREVETS NUBIAT, 5, Rue GalilÚe, Paris. March 29, 1933, No. 23463/34. Convention date, March 31, 1932. Divided out of 417,597. [Class 40 (ii).] Consists in means for photographically copying, by optical projection, a sound record mechanically engraved on a film or the like as a groove of constant transparency, the copying being such that a transverse enlargement of the image of the groove is obtained (i.e. an enlargement of the amplitudes represented by the edges of the groove). According to the invention, use is made of a printing machine of the known kind shown, in which the negative film 1 and the print film 6 are run through the gates 4, 7 at the same speed, but instead of the usual spherical projecting lens 8, a cylindrical lens is arranged with its axis parallel to the direction of travel of the films. Alternatively, a spherical lens giving high magnification may be employed, in conjunction with a very narrow slit interposed between the lens and the print film. Specification 417,644 is referred to.
GB23463/34A 1932-03-31 1933-03-29 Improvements in or relating to photographically copying sound records Expired GB417645A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR417645X 1932-03-31

Publications (1)

Publication Number Publication Date
GB417645A true GB417645A (en) 1934-10-01

Family

ID=8898227

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23463/34A Expired GB417645A (en) 1932-03-31 1933-03-29 Improvements in or relating to photographically copying sound records

Country Status (1)

Country Link
GB (1) GB417645A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633057A (en) * 1949-09-23 1953-03-31 Verneur E Pratt Microfilm camera
US2746833A (en) * 1953-04-13 1956-05-22 Jackson T Burr Method and apparatus for continuously reducing recorded telementric data
US2821892A (en) * 1952-09-30 1958-02-04 Shell Dev Photographic printing apparatus for seismic and other records
US2925465A (en) * 1951-12-07 1960-02-16 Girod Associates Apparatus for photocomposing and the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2633057A (en) * 1949-09-23 1953-03-31 Verneur E Pratt Microfilm camera
US2925465A (en) * 1951-12-07 1960-02-16 Girod Associates Apparatus for photocomposing and the like
US2821892A (en) * 1952-09-30 1958-02-04 Shell Dev Photographic printing apparatus for seismic and other records
US2746833A (en) * 1953-04-13 1956-05-22 Jackson T Burr Method and apparatus for continuously reducing recorded telementric data

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