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Electronic safety control system

  • US 20060261769A1
  • Filed: 05/17/2004
  • Published: 11/23/2006
  • Est. Priority Date: 05/17/2003
  • Status: Abandoned Application
First Claim
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1. An electronic safety control system comprising first and second elongate, flexible electrically-conductive sensing elements and electronic control means responsive to changes in capacitance, where when a change in capacitance arising from the proximity of an object to said first element differs substantially from a change in capacitance arising from the proximity of said object to said second element, an output signal is emitted for controlling a powered device, characterized in that the electronic control means is arranged to control the powered device and to arrest an advancing movement of a closure member operated by the powered device, in response to a differential change in detected capacitance between the first and second elements, wherein each sensing element comprises a pair of parallel, spaced-apart wires, incorporated into an elongate flexible strip.

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