Patent ID: 6393634
Filing Date: 2002-05-28
Classification: E03C

Abstract:
An automatic faucet, comprisinga faucet; a light generator for radiating infrared rays toward the bottom of a sink; a light receiver for receiving infrared rays reflected from the bottom of said sink, and detecting an amount of light thereby received; a flush output portion for comparing the detection output from said light receiver with a reference value, and creating a flush output when the detection output exceeds a predetermined value; and a faucet controller for opening and closing said faucet in accordance with an output of said flush output portion; the automatic faucet further comprising: a command device for generating a command signal to correct the reference value; a detection device for detecting a maximum amount of light, received by said light receiver, when a signal has been supplied by said command device; a reference value correction device for correcting the reference value in said flush output portion, based on the maximum amount of light detected and a predetermined tolerance added thereto; and a timer for providing an output to said command device when a predetermined time has passed, the predetermined time being more than twelve hours and less than one day.