Auxiliary Multitrack Magnetic Sound Reproducer
C. C. Davis, H. A. Manley · Journal of the Society of Motion Picture and Television Engineers · 1954
A four-track magnetic soundhead for reproducing CinemaScope films in theaters is described. The unit mounts readily between projector and upper film magazine and is film driven. To facilitate threading, the film sprocket is locked when the pressure pads are opened. A low natural-period Davis filtered drive insures high-quality film motion.