GB281615A - - Google Patents

Info

Publication number
GB281615A
GB281615A GB27058/27A GB2705827A GB281615A GB 281615 A GB281615 A GB 281615A GB 27058/27 A GB27058/27 A GB 27058/27A GB 2705827 A GB2705827 A GB 2705827A GB 281615 A GB281615 A GB 281615A
Authority
GB
United Kingdom
Prior art keywords
sound
negative
film
strip
negatives
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
GB27058/27A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB281615A publication Critical patent/GB281615A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B31/00—Associated working of cameras or projectors with sound-recording or sound-reproducing means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

281,615. British Thomson-Houston Co., Ltd., (Assignees of Hoxie, C. A.). Dec. 2, 1926, [Convention date]. records, combined photograph and kinematograph. - A combined pictorial and sound record is produced by first producing negatives of the two records on separate films selected as regards the sensitizing emulsion to suit the different nature of the exposures and combining the two negatives on a single positive film. For the picture negative, a. rapid emulsion is necessary in which the sensitive element is in relatively coarse grains. For the sound recorda relatively fine grain sensitive element is employed whereby " ground noises " are avoided. The two negatives are combined on a single film, which may be similar to that of the sound negative, to produce a positive film. One method of effecting this consists in first copying the picture negative 14, Fig. 3, on to the positive film 22 by running these two films together with a transparent film 18 having a blackened strip 19 past a beam of light from a source 23, and then copying the sound negative on the strip previously marked by the strip 19 by again running the positive now associated with the sound negative, and with a film which is blackened opposite to the picture strip past the source 23. A modified form of the apparatus described in Specification 180,296 may be used to produce the sound negative.
GB27058/27A 1926-12-02 1927-10-12 Expired GB281615A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US281615TA 1926-12-02 1926-12-02

Publications (1)

Publication Number Publication Date
GB281615A true GB281615A (en) 1928-04-19

Family

ID=31945712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27058/27A Expired GB281615A (en) 1926-12-02 1927-10-12

Country Status (1)

Country Link
GB (1) GB281615A (en)

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