The rotation of the disc A carrying lenses b, c, d, etc., sweeps
the image of the light source C across the screen F in a horizontal
direction, while line displacement in a vertical direction
is effected by reason of the changing angle of successive prism
elements.
The rotation of the disc A carrying lenses arranged in a spiral causes the light L to sweep across the screen M. A revolution every sixteenth second gives a motion picture screen effect.
Radio Motion Picture Mechanism
The rotation of the drum A carrying the lenses b, b′, b″, etc., causes the image of the light source S to sweep across the screen Y in two directions. A complete rotation every sixteenth of a second is motion picture speed.
Radio Vision hook-up circuits. A is the light cell. The upper circuit puts a “chopper” frequency onto the radio carrier wave by the inductive coupling.
The lower diagram shows an intermediate frequency oscillator to be controlled by a light cell (not shown), the intermediate being put on the carrier wave.