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
GB12745/37A
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.)
Zeiss Ikon AG
Original Assignee
Zeiss Ikon AG
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 Zeiss Ikon AGfiledCriticalZeiss Ikon AG
Publication of GB480062ApublicationCriticalpatent/GB480062A/en
H01J43/30—Circuit arrangements not adapted to a particular application of the tube and not otherwise provided for
Landscapes
Optical Recording Or Reproduction
(AREA)
Abstract
480,062. Optical sound - reproducing apparatus. ZEISS IKON AKT.-GES. May 4, 1937, No. 12745. Convention date, May 19, 1936. Drawings to Specification. [Class 40 (ii)] [Also in Group XL] In sound-film reproducing apparatus employing an electron-multiplier, light passing through the film is focused by a cylindrical lens on the primary photo-cathode of the multiplier, which lens may be a roller which serves to guide the film. Reference has been directed by the Comptroller to Specification 469,477, [Group XL].
GB12745/37A1936-05-191937-05-04Improvements in or relating to circuits for sound reproduction
ExpiredGB480062A
(en)