Abstract: An internal gage has a measuring assembly with two gaging fingers for contacting the part to be measured. One gaging finger is mounted upon a carriage driven by a precision screw assembly and the other gaging finger is mounted upon a platform supported by reeds and may be moved to various stations along the platform. The screw assembly is operatively connected to an incremental position transducer having a digital readout. The platform is associated with an electromechanical transducer connected to a zero meter. The measuring assembly is mounted upon a vertically movable support so that the internal dimensions of tapered parts may be ascertained. In addition, the fingers may include floating elements to enable the measurement of pitch diameters.

Abstract: A speed and position controller for a DC motor, having SCR power circuits, has a digital computing device directly connected to the SCR firing circuits for controlling the SCR firing angle. A command signal in the form of a number is applied to the computing device from a tape reader or other command signal generator. An encoder, operatively connected to the shaft of the motor, furnishes a feedback pulse frequency indicative of motor speed to a counter. The computing device periodically samples the number in the counter for speed and position computations. The computed firing angles are compared with maximum firing angles loaded into the computing device to prevent excessive currents which could cause arcing or demagnetization.