Abstract: An electric mirror control device provided with a proportionality constant conversion means for converting the proportionality constant of a detection output voltage to the angle of a mirror surface to be positive or negative. When an up-down sensor and a right-left sensor for detecting the angle of the mirror surface have a plurality of specifications, each of which has a different proportionality constant of the detection output voltage to the angle of the mirror surface, controller determines the specification of the angle sensors based on whether the proportionality constant of the detection output voltage output via the proportionality constant conversion means is positive or negative, and controls an up-down motor or a right-left motor in accordance with the determined specification stored in advance.

Abstract: The generator comprises means (2) for adjusting and an associated calculator, the adjusting means (2) comprising an endless rotative knob (4) capable of rotating through a given angle of which the position of the element to be controlled is a direct function, and pulse generating means (15, 17) generating a number of pulses which is proportional to the angle of rotation of the knob (4) and means for counting said number, and a selector of the direction of rotation. The calculator is programmed to determine, from the number of pulses counted, a proportion of the path the movable element must travel through realtive to end-of-travel means. The instruction determined by the calculator is then transmitted to a motor driving the movable element and to a position copying device. The invention permits obtaining a fine continuous, or substantially continuous, adjustment by a simple rotation of the knob. Application in particular to the control of opening elements of automobile vehicles.

Abstract: A multiple-purpose, closed-loop, automatic control system comprising:a system controlled;a detecting means for detecting a controlled variable output from the system controlled and converting the controlled variable into an electrical feedback signal;a signal converting means for receiving the feedback signal and converting said signal into an angular displacement corresponding to the feedback signal;a comparing means for comparing the controlled variable with a preset desired value and selectively opening or closing a forward or a reverse controlling circuit;a controlling means including the forward and the reverse controlling circuit selectively opened or closed by said comparing means, a braking control circuit and a driving mechanism responsive to said forward and reverse control circuits and said braking control circuit for automatic control over the system controlled to keep the controlled variable within the preset desired value.

Abstract: A signal generator for producing a control signal to control specific operations based upon the angular position of a rotating part in devices such as molding presses. An electrical signal related to the position of the rotating part is generated by using a potentiometer. The signal from the potentiometer is compared in a logic circuit to other adjustable electrical signals. Based upon the results of the comparison a control circuit provides the control signal. Furthermore, monitoring circuits are provided to detect any improper deviation in the electrical signals and upon detecting a deviation in an electrical signal the monitoring circuit provides an error output signal. An interrupter circuit is responsive to each monitoring device and disables the motion of the rotating part upon receipt of any error signal.

Abstract: A servo system feedback element including a potentiometer for providing a follow-up output having a waveform wherein the follow-up output increases linearly to a maximum value and decreases linearly to zero resulting in smooth operation of the servo for the full 360.degree. displacement of the potentiometer arm. Circuitry is provided to insure that the feedback element follows the shortest path to its command position.

Abstract: A machine tool having an electrical means for producing a non-cylindrical surface of revolution.