Switch acting in a contactless fashion
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United States of America Patent
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Aug 24, 2010
Grant Date -
Oct 5, 2006
app pub date -
Mar 7, 2006
filing date -
Mar 18, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a switch acting in contactless fashion for the purpose of detecting the position of a first part with respect to a second part, having a transceiver for attachment to one of the parts, which transceiver is supplied with power by an electrical supply source and comprises a coil, which is connected to a transmission/reception circuit, for the purpose of transmitting an interrogation signal and for the purpose of receiving a response signal, which can be transmitted in response to the interrogation signal by a transponder which can be arranged on the other part, wherein in addition to a first path for processing the response signal to an evaluation circuit, a second path is provided which has a proximity circuit, which is connected on the input side to a connection of the coil and on the output side to the evaluation circuit for the amplitude of the voltage tapped off by the coil for the purpose of determining the distance between the parts.
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