Key reading method and apparatus

摘要: A method and apparatus for reading a key to determine the depth of its notches. frame is moveable towards away from key, this having pin plurality contact pins thereon, all those being spring biased against spring, key. reader body fixed on has recesses, one recess associated with each pin, different depth. Once engages notch, continue move certain distance. The notch dependent number which have engaged bottoms their respective recesses body. Each such closes an electrical connection so that contacted recesses.