Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1997-05-30
1999-10-05
Lee, Benjamin C.
Communications: electrical
Condition responsive indicating system
Specific condition
340541, 340555, 315276, 315397, 315408, 137 1, 2502084, 25112904, G08B 2300
Patent
active
059631350
ABSTRACT:
The present invention relates to a proximity detecting device for detecting the presence of an object in a target area, comprising a low voltage power source, a circuitry for generating electrical pulses and supplying them to a light emitting diode (LED) in order to emit light pulses, and a receiver for reception of light pulses emitted from the LED and directed towards said target area, characterised in that said circuitry comprises a first circuitry containing a primary coil and switching means for connecting the primary coil for a period of time to said low voltage power source such as to accumulate a predetermined amount of magnetic energy in the primary coil, and a second circuitry containing said LED and a secondary coil magnetically coupled to said primary coil to transform the accumulated magnetic energy by mutual induction upon opening said switching means each time into one of said electrical pulses.
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International Sanitary Ware Manufacturing Cy, S.A.
Lee Benjamin C.
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