Control for automatic transmission

Claim 1

In a control for an automatic transmission driven by an engine having throttle means, comprising, in combination: ratio changing means; a solenoid for operating said ratio changing means; means for generating a throttle signal which is a function of throttle position; means for generating a speed signal which is a function of vehicle speed; and first circuit means (1) connected with said throttle signal generating means and speed signal generating means to receive said signals therefrom, and (2) operatively connected to said solenoid for effecting operation thereof; said first circuit means including means for comparing said signals and producing an output when said signals attain a predetermined relationship; the improvement wherein said throttle signal generating means comprises, in combination: magnetic means connected to said throttle means; second circuit means having a supply terminal connected with said first circuit means for generating a step voltage which represents said throttle signal, said second circuit means including a plurality of reed switches mounted on a supporting body in spaced relation to each other and to said magnetic means; said reed switches being energized by said magnetic means; wherein said step voltage changes in a stepped manner when any of said reed switches is closed, said step voltage being supplied to said first circuit means through said supply terminal.