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Title: Fading audio-level controls for sound-recording motion picture cameras
Claims: What is claimed is: 1. In a motion picture camera, fade means for carrying out fade-out and fade-in operations, sound-recording means for recording sound during film exposure, adjustable means operatively connected with said sound-recording means for adjusting the audio level thereof, and control means operatively connected on the one hand to said adjustable means and on the other hand to said fade means for automatically controlling said adjustable means to reduce the audio level when a fade-out operation is carried out by said fade means and to gradually increase the audio level when a fade-in operation is carried out by said fade means. 2. In a motion picture camera, fade means for carrying out fade-out and fade-in operations, sound-recording means for recording sound during film exposure, adjustable means operatively connected with said sound-recording means for adjusting the audio level thereof, and control means operatively connected on the one hand to said adjustable means and on the other hand to said fade means for automatically controlling said adjustable means to reduce the audio level when a fade-out operation is carried out by said fade means and to increase the audio level when a fade-in operation is carried out by said fade means, said sound-recording means including an automatic means for automatically controlling the audio level during normal film exposure and sound-recording, and switch means electrically connected with said automatic means for rendering the latter ineffective during operation of said fade means. 3. The combination of claim 2 and wherein said fade means has a predetermined rest position during normal film exposure and sound-recording when fading operations are not carried out, and said fade means when in said rest position thereof acting through said control means on said adjustable means for preventing the latter from influencing said sound-recording means. 4. The combination of claim 2 and wherein said switch means is operatively connected with said adjustable means for rendering the latter effective only when said automatic means is rendered ineffective during fading operations. 5. In a motion picture camera, fade means for carrying out fade-out and fade-in operations, sound-recording means for recording sound during film exposure, adjustable means operatively connected with said sound-recording means for adjusting the audio level thereof, and control means operatively connected on the one hand to said adjustable means and on the other hand to said fade means for automatically controlling said adjustable means to reduce the audio level when a fade-out operation is carried out by said fade means and to increase the audio level when a fade-in operation is carried out by said fade means, said adjustable means being a photosensitive means for responding to light in order to adjust the audio level, light-source means positioned with respect to said photosensitive means for directing light to the latter, and said control means being situated between said light-source means and said photosensitive means for regulating the amount of light transmitted from said light-source means to said photosensitive means in response to operation of said fade means. 6. The combination of claim 5 and wherein said control means includes between said light-source means and said photosensitive means a diaphragm means for varying the extent to which light is transmitted from said light-source means to said photosensitive means during fading operations. 7. The combination of claim 6 and wherein a light-diffusing means is situated between said light-source means and said photosensitive means for diffusing the light transmitted by way of said diaphragm means to said photosensitive means. 8. The combination of claim 6 and wherein said diaphragm means includes a member formed with a tapered aperture through which light travels from said light-source means to said photosensitive means, and said member moving in response to operation of said fade means for blocking light from said light-source means to a variable extent during fading operations. 9. The combination of claim 8 and wherein said diaphragm means decreases the extent of light transmission during a fade-out operation and increases the extent of light transmission during a fade-in operation. 10. The combination of claim 9 and wherein said photosensitive means is a photosensitive resistor whose resistance varies inversely with respect to the amount of light received by said photosensitive means from said light-source means. 11. The combination of claim 5 and wherein said photosensitive means is a photo-transistor. 12. In a motion picture camera, fade means for carrying out fade-out and fade-in operations, sound-recording means for recording sound during film exposure, adjustable means operatively connected with said sound-recording means for adjusting the audio level, thereof, and control means operatively connected on the one hand to said adjustable means and on the other hand to said fade means for automatically controlling said adjustable means to reduce the audio level when a fade-out operation is carried out by said fade means and to increase the audio level when a fade-in operation is carried out by said fade means, said adjustable means being a variable resistor operatively connected with said control means to be adjusted thereby. Other info: Inventors: Yoshimura, Hirofumi (Tokyo, JA) Higuma, Toyonori (Tokyo, JA) Itoo, Noriaki (Tokyo, JA) Application Number: 515898 Filing Date: 1974-10-18 Publication_date: 1976-04-13 Assignee: Kabushiki Kaisha Yashika (JA) Primary Class(es): 352/25 352/91C, 352/91S Other Classes: US Patent Ref:
Other Refs: Primary Examiner: Hix, L. T. Assistant Examiner: Adams, Jr., Russell E. Attorney: Steinberg & Blake |
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