Three-way switch for home automation apparatus and method
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United States of America Patent
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Feb 12, 2013
Grant Date -
Jun 16, 2011
app pub date -
Jun 15, 2010
filing date -
Jun 15, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A switch for premises electrical circuits provides wireless control compatible with at least one home automation control system technology. A single switch design can operate two-, three-, and four-way circuits without alteration, and without recourse to coordinating remote switches. The switch includes processor functions for restoring a previous state after power interruption, and for establishing a state commanded during the power interruption. The switch uses two single-pole, single-throw relays for positive safety lockout, and adjusts relay actuation timing with reference to power waveform zero-crossing for contact arc reduction with inductive, tungsten, and capacitive loads.
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