Self-starting swinging apparatus

A self-starting oscillating ornamental and advertising display apparatus including a swinging portion and a stationary portion, comprising:

• a free-running oscillation circuit including a PNP transistor and an NPN transistor, the base of each one of transistors being connected to the collector of the other of transistors, a capacitor for setting a time constant being used to connect the base of one transistor to the collector of the other transistor;
• a power source connected to said free-running oscillation circuit;
• a driving coil connected to the collector of the transistor having said capacitor connected thereto, as a load on that transistor;
• and
• a permanent magnet having a relatively repulsive or attractive magnetic pole arrangement of the same polarity or of a different polarity from that of a magnetic pole in a magnetic field which is generated in said driving coil when an electric current is fed to said driving coil from said free-running oscillation circuit, said permanent magnet being relatively movable with respect to said driving coil and capable of performing a relative swinging motion under the action of an arbitrary restoring force, one of said permanent magnet and said driving coil being fixed to said swinging portion and the other being fixed to said stationary portion in a position deviated from a neutral point of a swing motion of the swinging portion;
• wherein said power source comprises an electrolytic capacitor for supplying in the form of a short-time discharge current an electric energy necessary for driving said permanent magnet to said driving coil, and an arbitrary direct current power source is connected to said electrolytic capacitor through a resistor inserted in series, for supplying a charging current to compensate for the electric charge lost by said short-time discharge during an unenergized period of said driving coil.