Solid state rotary entry control system

A rotary entry control system for an appliance control that includes a microprocessor and multiplexed display means electrically connected to output means of said microprocessor and thereby being controlled by said microprocessor, the control system comprising, in combination, rotary entry logic encoding means electrically connected to input means of said microprocessor for entering first desired data into said microporcessor, said microprocessor having means for operating said display means to display the magnitude of said first desired data as said data is being entered into said microprocessor by said rotary entry logic encoding means, said rotary entry logic encoding means comprising a manually rotatable switch means that is adapted to be rotated in uniform increments of movement by an operator through a plurality of serially disposed ranges in one rotational direction, said means of said microprocessor causing a uniform change in said magnitude of the data display by said display means for each said increment of movement of said rotatable switch means in said one direction in each said range with each uniform change in magnitude for its respective range being a different amount than the amount of uniform change in the range adjacent thereto, said control system also including additional means electrically connected to said microporcessor for entering additional data into said microprocessor, said rotary entry logic encoding means comprising an electrically insulative member having two like and circular and uniformly segmented conductive tracks disposed thereon in concentric and in offset relation relative to each other whereby each segmented track has a fifty percent duty cycle of conductive material versus insulative material and having a circular and continuous conductive track disposed thereon in concentric relation to said segmented tracks, each said segmented track having a like repeating code pattern of two reference areas of said conductive material followed by two reference areas of said insulative material with each reference area being spaced from the next adjacent reference area by a like distance, said tracks being offset relative to each other by one reference area, contact means cooperating with said tracks, and means adapted to be operated by an operator for causing relative rotational movement between said insulative member and said contact means for entering said first desired data into said microprocessor.