An improved multiturn potentiometer consists of a rotor assembly including a wiper in electrical contact with an output terminal and an annular resistance strip. The annular resistance strip is electrically connected to a source of potential through one or more potentiometric rotary switches which are activated periodically change the magnitude of potential to the annular resistance strip. Movement of the wiper along the annular resistance strip varies the potential to the output terminal. Activation of the rotary switches is effected by rotation of the rotor assembly and increases or decreases the potential to the annular resistance strip depending on the direction of rotation. Each potentiometric rotary switch is capable of multiple variations of potential so that each revolution of the rotor assembly effects movement of the rotary switch to supply a new potential to the annular resistance strip. As the wiper moves along the annular resistance strip the signal to the output terminal is interpolation of the potential of the annular resistance strip. In one embodiment there are three switches spaced about the annular resistance strip and the annular resistance strip is divided into three segments, each of which are connected to one of the switches. Each switch has seven positions for variation of potential.
展开▼
