Document Type and Number:
Japanese Patent JPS5324965
Kind Code:
B1
Abstract:
A device for controlling electric current flowing through a conductor-coated, condensation-free transparent glass sheet in response to the presence of moisture on the surface of the sheet. Moisture-detecting electrodes forming part of an oscillator are attached to the surface of the sheet and receive an AC voltage developed within the oscillator. The electrical resistance between the electrodes changes in response to the amount of moisture and alters the level of output from an oscillator. A relay circuit is controlled by the oscillator output to switch a power supply circuit on and off, thereby controlling the current flowing through the glass sheet.
Application Number:
JP5780471A
Publication Date:
July 24, 1978
Filing Date:
July 31, 1971
Export Citation:
International Classes:
G01N27/12; G05D22/02; H05B3/84; (IPC1-7): C03C17/00; B60S1/02