Signal transmitter

Abstract

Abstract PURPOSE:To eliminate the need for a power source such as a battery at a moving side by supplying an electric power and the transmission/reception of a signal between a fixed side and the moving side through the electromagnetic induction between a fixed coil and a moving coil. CONSTITUTION:When the oscillation output of an oscillation circuit 12 is supplied to the fixed coil 11 of the fixed side 10, the electric power of the same frequency with the oscillation output is induced across the moving coil 21. This electric power is rectified by a rectifying circuit 22 and supplied as DC electric power to a control circuit 23 to vary the current flowing through contacts forming a closed loop among plural contacts. This current variation is detected by a detecting circuit 13 and even movable contacts forming the closed loop are broken among AND circuits AND1-ANDn, turning on a light emitting diode LED.

Inventors

• 👤 Takaaki Iwasaki
• 👤 孝明 岩崎

Bibliographic Details