| 摘要 |
1378925 Measuring moisture electrically SAINT-GOBAIN INDUSTRIES 22 Feb 1972 [22 Feb 1971] 8118/72 Heading G1N Apparatus for measuring the moisture on a glass sheet comprises inter-digitated conductors 5a, 6a Fig. 3 located on the surface of the glass sheet and connected to control the input current to an amplifier 10 whereby, when the moisture deposit lowers the resistance between conductors 5a, 6a sufficiently, the output from amplifier 10 energizes a relay 11 to close the circuit for heating wires 4 located on or in the glass sheet. When the moisture is dispersed the resistance between conductors 5a, 6a rises and relay 11 is de-energized. |
