Golf swing analyzer

Claim 1

A golf swing analyzer comprising a permanent magnet attached to the head of a golf club; two magnetic sensors spaced apart from each other horizontally and in parallel relationship with an ideal swing direction of the golf club; first detecting means for receiving outputs signals from said two sensors for detecting whether the output signals are larger or smaller than a reference potential level Vo plus a predetermined value; second detecting means adapted to receive output signals from said two sensors for detecting whether the output signals are larger or smaller than a reference potential level Vo minus said predetermined value; first counter adapted to receive pulse signals response to the detected output signals that are equal to "Vo+said predetermined value" level in order to measure at time interval T1 indicative of the swing motion of the golf club between the two sensors; second counter adapted to receive pulse signals responsive to the detected output signals that are equal to "Vo-said predetermined value" level in order to measure a time interval T2 indicative of the swing motion of the golf club between the two sensors; and a calculating means comprised of a central processing unit for calculating the swing speed of the golf club and the deviation of the swing direction of the golf club from its desired direction based on T1 and T2, wherein the swing speed is calculated by said calculating means by dividing a distance between the first and second sensors by (T1+T2)/2 and wherein the deviation is calculated by the difference between T1 and T2.