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
GB34452/34A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AGfiledCriticalIG Farbenindustrie AG
Publication of GB448117ApublicationCriticalpatent/GB448117A/en
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
Landscapes
Diaphragms For Electromechanical Transducers
(AREA)
Abstract
448,117. Optical sound - recorling process. I. G. FARBENINDUSTRIE AKT.- GES., Frankfort-on-Main, Germany. Nov. 30, 1934, No. 34452. Convention date, Dec. 15, 1933. [Class 40 (ii)] Sound records of broadcast productions or of performances which are to be broadcast are produced by recording the sounds photographically on a film which is then immediately developed at a raised temperature, fixed, washed and dried so as to produce a negative which can be reproduced directly. Marks can be applied, e.g. photographically, at the edge of the film for facilitating arrangement of the records in the archives. Reference has been directed by the Comptroller to Specification 297,078, [Class 40 (ii)].
GB34452/34A1933-12-151934-11-30Process for making sound records of performances which are to be broadcast
ExpiredGB448117A
(en)