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Title: Window-closing safety system

A safety device includes a wire loop embedded in the glass of a passenger car window and routed near the closing leading-edge of the window. The wire loop carries microwave pulses around the loop to and from a transceiver with separate output and input ports. An evanescent field only and inch or two in radius is created along the wire loop by the pulses. Just about any object coming within the evanescent field will dramatically reduce the energy of the microwave pulses received back by the transceiver. Such a loss in energy is interpreted as a closing area blockage, and electrical interlocks are provided to halt or reverse a power window motor that is actively trying to close the window.
  1. (Livermore, CA)
Issue Date:
OSTI Identifier:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5661385
Contract Number:
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
window-closing; safety; device; wire; loop; embedded; glass; passenger; car; window; routed; near; closing; leading-edge; carries; microwave; pulses; transceiver; separate; output; input; ports; evanescent; field; inch; radius; created; coming; dramatically; reduce; energy; received; loss; interpreted; blockage; electrical; interlocks; provided; halt; reverse; power; motor; actively; trying; close; safety device; input ports; wire loop; pulses received; microwave pulses; microwave pulse; rate output; wave pulse; dramatically reduce; /318/324/340/