GB306438A - Improvements in or connected with recording sound - Google Patents

Improvements in or connected with recording sound

Info

Publication number
GB306438A
GB306438A GB2794527A GB2794527A GB306438A GB 306438 A GB306438 A GB 306438A GB 2794527 A GB2794527 A GB 2794527A GB 2794527 A GB2794527 A GB 2794527A GB 306438 A GB306438 A GB 306438A
Authority
GB
United Kingdom
Prior art keywords
film
sound
fluctuations
light
record
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
GB2794527A
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.)
FOREST PHONOFILMS Ltd DE
STUART KEITH WILSON
Original Assignee
FOREST PHONOFILMS Ltd DE
STUART KEITH WILSON
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 FOREST PHONOFILMS Ltd DE, STUART KEITH WILSON filed Critical FOREST PHONOFILMS Ltd DE
Priority to GB2794527A priority Critical patent/GB306438A/en
Publication of GB306438A publication Critical patent/GB306438A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R29/00—Monitoring arrangements; Testing arrangements

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

306,438. Wilson, S. K., and De Forest Phonofilms, Ltd. Oct. 20, 1927. Optical apparatus.-In recording sound photographically by converting it into current fluctuations which are converted into sound fluctuations acting on a sensitive film &c. the light fluctuations, either before or after acting on the film, are caused to influence a circuit containing a monitoring telephone or speaker so as to indicate the characteristics of the recorded sound and thus disclose, whilst recording, any distortion which may be introduced by the amplifying means for the sound-influenced current. In one arrangement, Fig. 1, the beam from the fluctuating light source 3 makes a record on the film 5 and passes therethrough to fall on to one or more light-sensitive cells 8 in circuit with amplifying devices and one or more telephones or speakers. In another arrangement, Fig. 2 a part of the fluctuating light directed on to the film is deflected or reflected by a prism, mirrors, &c. 12 to influence the cell or cells 8. The record is preferably made on a part of the film between the feeding and guiding sprockets where it is traversed uniformly against a film gate. The cell is suitably mounted on the back of the film gate.
GB2794527A 1927-10-20 1927-10-20 Improvements in or connected with recording sound Expired GB306438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2794527A GB306438A (en) 1927-10-20 1927-10-20 Improvements in or connected with recording sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2794527A GB306438A (en) 1927-10-20 1927-10-20 Improvements in or connected with recording sound

Publications (1)

Publication Number Publication Date
GB306438A true GB306438A (en) 1929-02-20

Family

ID=10267795

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2794527A Expired GB306438A (en) 1927-10-20 1927-10-20 Improvements in or connected with recording sound

Country Status (1)

Country Link
GB (1) GB306438A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882499C (en) * 1939-05-09 1953-07-09 Grammophon G M B H Deutsche Device for measuring the level of vinyl recordings
US4051329A (en) * 1975-03-21 1977-09-27 Thomson-Brandt An optical information recording system in which the energy when transmitted to the recording layer is constant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE882499C (en) * 1939-05-09 1953-07-09 Grammophon G M B H Deutsche Device for measuring the level of vinyl recordings
US4051329A (en) * 1975-03-21 1977-09-27 Thomson-Brandt An optical information recording system in which the energy when transmitted to the recording layer is constant

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