PROXIMITY ANTENNA STRUCTURE FOR A LAVATORY OR PLUMBING FIXTURE
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Abstract
A SENSING DEVICE, OFTEN CALLED AN "ANTENNA," EMPLOYED WITH A CAPACITANCE-OPERATED PROXIMITY CONTROL CIRCUIT FOR A LAVATORY OR OTHER PLUMBING FIXTURE TO DETECT AND RESPOND TO THE PRESENCE OR ABSENCE OF A USER IN FRONT OF THE LAVATORY. THE ANTENNA DEVELOPS AN INCREASE IN CAPACITANCE UPON THE ARRIVAL OF THE USER AT THE FRONT OF THE LAVATORY. THE INCREASE OF CAPACITANCE ACTIVATES THE CONTROL CIRCUIT WHICH TURNS ON THE FAUCET OF THE LAVATORY AND KEEPS IT TURNED ON WHILE THE USER WASHES HIS HANDS AND INCIDENTALLY SWAYS HIS BODY. WHEN THE USER DEPARTS FROM THE LAVATORY, THE FAUCET WILL BE TURNED OFF UPON THE RESULTING DECREASE IN THE CAPACITANCE OF THE ANTENNA.
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