Patent ID: 6741160
Filing Date: 2004-05-25
Classification: G07C,Y10T

Abstract:
An electronic combination lock comprising:a knob; a knob rotation detector, said detector senses rotation of said knob; a bolt; a display; and an electronic circuit, said circuit receives a knob rotation signal from said knob rotation detector, said circuit converts said knob rotation signal into a display number, said circuit stores said display number as a combination number in memory, upon receiving a signal indicating reversal of said knob before said knob rotates to select a subsequent combination number said circuit recalls said combination number from said memory and updates said display with said combination number, said circuit updates said display number as said knob rotates until said combination number is stored, said circuit combines one or more combination numbers into an entered combination, said circuit compares said entered combination with an authorized combination, upon said entered combination comparing equal to said authorized combination said circuit enables said bolt to be withdrawn and said lockopened.