发明名称 |
ELECTRONIC DEVICE FOR DETECTING THE PASSAGE OF NONCONDUCTIVE SHEETS |
摘要 |
Series inductance-capacitance circuit is coupled and tuned to resonance with a constant frequency signal source. The circuit includes capacitance sensor plates which sense the passage of double thickness nonconductive sheets and change the reactance of the circuit to produce a voltage change at the input to the circuit. This voltage change is detected and actuates a switch.
|
申请公布号 |
US3646372(A) |
申请公布日期 |
1972.02.29 |
申请号 |
USD3646372 |
申请日期 |
1967.06.05 |
申请人 |
NORFIN INC. |
发明人 |
DONALD L. SNELLMAN;RICHARD A. MARSON;ERNEST D. DAVIS |
分类号 |
H03K17/955;(IPC1-7):G01N27/00 |
主分类号 |
H03K17/955 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|