Patent ID: 6577132
Filing Date: 2003-06-10
Classification: G01R

Abstract:
A passive apparatus for the detection and indication of non-ionizing electromagnetic radiations and static electricity and adapted to be applied to or integrated in an anti-radiation/anti-static/anti-reflection emission blocking filter, the apparatus comprising:a discharge cable connected to an electric contact of the filter; a detector circuit having an input, the electric contact being connected to said input by the discharge cable; the detector circuit comprising: a diode having a first end and a second end; the diode having its first end connected to said input, a switch connected to said input; a detecting device connected in series to the diode at the second end of the diode; and a plurality of capacitors coupled in series to the switch; and a low consumption indicator tuned with said plurality of capacitors for indicating the presence of at least one non-ionizing electromagnectic radiation and static electricity connected at one end to the second end of the diode; wherein one end of each of the detecting device, the indicator and the plurality of capacitors is connected together to ground and are connected in parallel with each other wherein the detecting circuit and indicator is driven by the current in the discharge cable without requiring an external power source.