Window-closing safety system

Patent · Wed Jan 01 04:00:00 EST 1997

OSTI ID:871119

McEwan, Thomas E ^[1]

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1. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA
• DOE Contract Number: W-7405-ENG-48
• Assignee: Regents of University of California (Oakland, CA)
• Patent Number(s): US 5661385
• OSTI ID: 871119
• Country of Publication: United States
• Language: English

Related Subjects

/318/324/340/
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created
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dramatically
dramatically reduce
electrical
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energy
evanescent
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glass
halt
inch
input
input ports
interlocks
interpreted
leading-edge
loop
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microwave
microwave pulse
microwave pulses
motor
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power
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pulses
pulses received
radius
rate output
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reduce
reverse
routed
safety
safety device
separate
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wave pulse
window
window-closing
wire
wire loop