Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2006-12-19
2006-12-19
Wu, Daniel (Department: 2612)
Communications: electrical
Condition responsive indicating system
Specific condition
C340S545200, C340S545300, C340S545700, C340S551000, C049S025000, C049S026000, C049S027000, C049S028000, C160S001000, C160S310000
Reexamination Certificate
active
07151450
ABSTRACT:
A door system includes an antenna-based proximity sensor with a releasable electrical connector that enables the sensor to function with a breakaway feature of the door. The sensor includes a signal generator and a door-mounted antenna for sensing a body or an obstruction near the door. The signal generator (or oscillator) can be installed at various locations between a power source and the antenna. In some cases, the wiring between the antenna and the power source includes a rotatable feature to accommodate the rotation of a drum that carries a wrap-up, pliable door panel. The rotatable feature may be a rotatable electrical connector, or it may be a wire having sufficient length and flexibility to twist about itself within the hollow interior of the drum.
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