GB477989A - Improvements in or relating to the recording of sound on cinematograph film - Google Patents

Improvements in or relating to the recording of sound on cinematograph film

Info

Publication number
GB477989A
GB477989A GB1581336A GB1581336A GB477989A GB 477989 A GB477989 A GB 477989A GB 1581336 A GB1581336 A GB 1581336A GB 1581336 A GB1581336 A GB 1581336A GB 477989 A GB477989 A GB 477989A
Authority
GB
United Kingdom
Prior art keywords
sound
recording
mirror
piezo
crystal
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
GB1581336A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1581336A priority Critical patent/GB477989A/en
Publication of GB477989A publication Critical patent/GB477989A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/02—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light
    • G02B26/04—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the intensity of light by periodically varying the intensity of light, e.g. using choppers

Abstract

477,989. Optical sound-recording apparatus; piezo-electric crystals. SCRUBY, B., and ROBERTS, A. J. June 5, 1936, No. 15813. [Classes 40 (iii) and 40 (v)] Relates to sound - recording apparatus of the kind employing two grids, the image of one of which (5) is reflected by a vibratory mirror on to the other grid, (9), as described in Specification 325,569, [Class 40 (ii)]. According to the invention, the mirror 6 is directly attached to the rochelle crystal 29 of a piezo-electric oscillator, which is connected to the output of an amplifier for the sound to be recorded. The crystal, which bends without twisting under the influence of potential applied to tin foil layers on its opposite sides, is preferably clamped between rubber blocks at its lower end and has the mirror attached to its upper end, e.g. by wax. The Figure shows the general arrangement of the apparatus for recording on 16 mm. film, driven by a sprocket 16 and controlled by a flywheel 20.
GB1581336A 1936-06-05 1936-06-05 Improvements in or relating to the recording of sound on cinematograph film Expired GB477989A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1581336A GB477989A (en) 1936-06-05 1936-06-05 Improvements in or relating to the recording of sound on cinematograph film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1581336A GB477989A (en) 1936-06-05 1936-06-05 Improvements in or relating to the recording of sound on cinematograph film

Publications (1)

Publication Number Publication Date
GB477989A true GB477989A (en) 1938-01-05

Family

ID=10065947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1581336A Expired GB477989A (en) 1936-06-05 1936-06-05 Improvements in or relating to the recording of sound on cinematograph film

Country Status (1)

Country Link
GB (1) GB477989A (en)

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