Abstract: A switch assembly that can vary at least two controllable parameters and can vary the upper, lower and any intermediary limits of the switch assembly. The switch assembly has a pair of nested coaxial rotary knobs each attached by shafts to sensors that determine the radial position of a reference point on each knob. The knobs rotate with respect to each other and are constructed to allow rotation of the knobs with one hand. The sensors are attached to the controls of the parameters, such that rotation of the knobs varies the output of the parameters. The sensors are coupled to a magnetic clutch that engages and prevents rotation of one of the knobs, when the knob is rotated into a predetermined radial position. A computer can be connected to the magnetic clutch and sensors. The computer receives input signals from the sensors and produces an output signal to the clutch, to engage the clutch and prevent rotation of the knob in accordance with a computer program.

Abstract: A switch that can vary at least two controllable parameters and can vary the upper, lower and any intermediary limits of the switch. The switch has a pair of nested coaxial rotary knobs each attached by shafts to sensors that determine the radial position of a reference point on each knob. The knobs rotate with respect to each other and are constructed to allow rotation of the knobs with one hand. The sensors are attached to the controls of the parameters, such that rotation of the knobs varies the output of the parameters. The sensors are coupled to a magnetic clutch that engages and prevents rotation of one of the knobs, when the knob is rotated into a predetermined radial position. A computer can be connected to the magnetic clutch and sensors. The computer receives input signals from the sensors and produces an output signal to the clutch, to engage the clutch and prevent rotation of the knob in accordance with a computer program within the computer.