Patent ID: 7019680

Claim:
A controller comprising: a) a housing ( 3 ); b) an electronic transmitting circuit ( 5 ) mounted within said housing; c) a base member ( 7 ) having formed therein a thin elastomeric web ( 9 ), said web encircling and joined to a rocker block ( 13 ), said rocker block having upper ( 15 ) and lower ( 17 ) surfaces wherein the lower surface ( 17 ) includes a fulcrum ( 19 ) and first and second induction field modifier engagement surfaces ( 21 , 25 ); d) a base plate ( 27 ) including a fulcrum bar ( 29 ), said fulcrum bar being configured to pivotally engage said fulcrum ( 19 ) of said rocker block ( 13 ), said base plate ( 27 ) being attached within said housing ( 3 ); e) a pair of first and second frequency oscillating circuits, each said circuit including a separate induction coil ( 37 , 39 ), for producing an induction field thereabout, the normal resonating frequency of said first oscillating circuit being different from the normal resonating frequency of said second oscillating circuit, said first and said second oscillating circuits producing a baseline frequency that is the frequency difference between the two said oscillating circuits, each said induction coil ( 37 , 39 ) including an induction field modifying armature ( 41 , 43 ); f) said first and second induction coils ( 37 , 39 ) and said induction field modifying armatures ( 41 , 43 ) being held in spaced relationship and proximate to first and second induction field modifying armature engagement surfaces ( 21 , 25 ), each said induction coil ( 37 , 39 ) positioned such that, when said rocker block ( 13 ) is pivoted about said fulcrum bar ( 29 ), in a first radial direction, said first induction field modifier engagement surface ( 21 ) will engage said first induction field modifying armature ( 41 ) and move it across said induction field generated by said first induction coil ( 37 ), to alter the oscillating frequency of said first frequency oscillating circuit, and when said rocker block ( 13 ) is pivoted about said fulcrum bar ( 29 ) in the opposite direction, said second induction field modifier engagement surface ( 25 ) will engage said second induction field modifying armature ( 43 ) and move it across said induction field generated by said second induction coil ( 39 ) to alter the oscillating frequency of said second frequency oscillating circuit; g) a subtractor ( 55 ) adapted to receive said frequencies outputted from said first and said second frequency oscillating circuits and subtracting the lower of said frequencies from the higher of said frequencies to produce the frequency difference between the frequencies; h) a microprocessor ( 57 ) arranged to receive the frequency difference between the frequencies; and, i) a circuit board ( 33 ), including said subtractor ( 7 ) and said microprocessor ( 57 ), being attached in spaced relationship to said base plate ( 27 ), said frequency oscillating circuits being physically and electrically attached to said circuit board ( 33 ) and electrically connected to said transmitting circuit ( 5 ).