Abstract: A sound cinecamera is provided with a film feeding motor, an electric circuit for sound recording, an operating means, a controlling signal generating circuit for the purpose of generating, by receiving an instruction signal generated from said operating means, a sound record controlling signal during the time of film reverse-winding for overlap recording and reducing said controlling signal according to a predetermined time constant at the time of starting the film feeding operation again, a sound recoding signal control circuit for the purpose of controlling the level of recording signal in said sound recording circuit by receiving said controlling signal from said controlling signal generating circuit, and an AC biasing control circuit for the purpose of controlling the level of the AC biasing signal to said sound recording circuit by receiving said controlling signal from said controlling signal generating circuit.

Abstract: A sound-cinecamera comprising a motor for driving a capstan at uniform velocity, a motor for feeding a film intermittently, a detecting switch for detecting any superfluity or insufficiency of the film feed by said film-feeding motor relative to the film feed by said capstan driving motor and generating corresponding sag-signals, a speed-controlling circuit connected to said film-feeding motor and comprising a tachometer generator for maintaining the stability of the speed of said motor, and a sag-detecting circuit comprising said detecting switch, said sag-detecting circuit being connected to the power source of said film-feeding motor and the output thereof is connected to the controlling means of said speed-controlling circuit through a delay circuit, whereby said sag-signals generated by said detecting switch are transmitted to said controlling means independently of said speed-controlling circuit for regularizing fluctuations in the number of revolution of said film-feeding motor arising from fluctuation