Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1978-03-02
1979-06-05
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
352166, 352180, 352194, 352216, H04N 336, G03B 2146, G03B 2148, G03B 122
Patent
active
041575709
ABSTRACT:
The TV-cine conversion projector adapted to carry out the ordinary film projection of the projector at the feeding rate of the film frames of substantially 24 frames/sec. and 18 frames/sec., while, in cooperation with a TV camera tube such as a vidicon, it can convert the projected images of the film at the feeding rate of the film frames of substantially 24 frames/sec. and 18 frames/sec. into TV pictures scanned at the scanning rate of 60 fields/sec. or 50 fields/sec. comprises a main shaft driven at a constant speed, a sound sprocket driven by the driving shaft for rotation at a speed corresponding to the rate of intermittent feeding of the film, a shutter driven by the main shaft for synchronizing the rate of interruption of the projection light with the actuation of an intermittent film feeding claw driven by the driving shaft at a speed of substantially 24 frames/sec., the shutter being so determined that the rate of interruption of the projection light is synchronized with the scanning rate of TV camera tube when the main shaft is driven at the constant speed. Provision is made of clutch means for selectively switching the rotational speed of the sound sprocket to a speed corresponding to either of substantially 24 frames/sec. or 18 frames/sec. of the feeding rate of the film while the main shaft is held driven at the constant speed, intermittent film feeding preventing means adapted to selectively render the intermittent film feeding claw to be inoperative once per four times of operation thereof, and switching means operably coupling the clutch means with the intermittent film feeding preventing means, thereby permitting the intermittent film feeding preventing means to be rendered to be operable for inactivating the intermittent film feeding claw once per four times of operations thereof only when the switching means is switched to a position for switching the rotational speed of the sprocket from that corresponding to substantially 24 frames/sec. to that corresponding to substantially 18 frames/sec. so that the TV-conversion of the images of the film at the rate of feeding of the film of substantially 24 frames/sec. and 18 frames/sec. can be converted into TV pictures scanned either one of the scanning rates of 60 fields/sec. and 50 fields/sec.
REFERENCES:
patent: 2849914 (1958-09-01), Vinten
patent: 3002423 (1961-10-01), Straub
patent: 3870407 (1975-03-01), Wakahara
patent: 3951531 (1976-04-01), Nakai et al.
patent: 4094595 (1978-06-01), Lieckfeldt
Griffin Robert L.
Munz Otto John
Psitos Aristotelis M.
Yamawa Denki K.K.
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