Claude F Macdonald

US Patent:

59491507, Sep 7, 1999

Filed:

Oct 27, 1997

Appl. No.:

8/958302

Inventors:

Claude F MacDonald - Saranac Lake NY

International Classification:

H02P 300

US Classification:

307 101

Abstract:

An automatic windshield wiper system connected to a source of power and windshield wipers of a vehicle for automatically controlling operation of the windshield wipers based upon an intensity of falling precipitation. The automatic windshield wiper system includes a transducer for sensing precipitation and generating a signal indicative of the sensed precipitation and a comparator connected to receive the control signal. The comparator analyzes the control signal to determine whether precipitation is falling. A relay is connected between the comparator and the windshield wipers. The relay is toggled by the comparator to supply power from the power source to activate the windshield wipers upon a determination by the comparator that the transducer sensed falling precipitation, the transducer continually senses the state of falling precipitation and continually transmits signals to the comparator. The comparator toggles the relay between the open and closed states turning the windshield wipers on and off based upon the conditions sensed by the transducer.