Window-closing safety system

Details Window-closing safety system Window-closing safety system

1995-08-03

1997-08-26

Sircus, Brian

Electricity: motive power systems

Automatic and/or with time-delay means

Electrical conditions in circuit other than controlled motor...

324642, 340552, 340561, H01P 710, H02P 122

Patent

active

056613857

ABSTRACT:
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.

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patent: 5412297 (1995-05-01), Clark et al.
patent: 5448222 (1995-09-01), Harman
patent: 5495137 (1996-02-01), Park et al.

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