Multi-parameter variable scale rotary switch

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. The integration of a computer allows the limits of a switch to be controlled by changing the computer program. The switch has a button in the center that can be pushed in relative to the knobs. The button is attached by a shaft to a micromotion switch that can also be coupled to the computer. The button can be used as a start/stop switch, or to change the functions controlled by the knobs. The switch can also be constructed such that the knobs are connected to another sensor, such that the equipment can be immediately stopped by pusing the knobs down.