Metronome-breaker

Metronome-breaker - device for rhythmic circuit and open circuit or change the direction of the current in the circuit. Used in physiological research and electrotherapy.
Mechanical metronome-breaker (Fig) consists of a pendulum to its axle reinforced conductive contacts. When the pendulum is swinging, and they get into a still included in the current circuit Cup of mercury and make the necessary switching.
Electric Meters-p. represents the rotating with the help of the drive drum, on the surface of which there are contacts. When rotating drum contacts relate to fixed brushes, carrying the necessary switching.
Electronic metronome-breaker consists of several appropriately interconnected electronic lamps, which provide the necessary changes in the circuit without the help of mobile contacts.

metronome-breaker