Abstract: Apparatus for controlling the position of an antenna rotator from remote locations includes a sender unit which generates desired antenna position information and a control circuit associated with an antenna rotator. The sender includes a dial for selecting the desired antenna position, a control transmitter responsive to the position of the dial for providing an output at a first frequency containing the antenna position information and a holding circuit for continuing the output of the control transmitter until the antenna reaches the desired position. The sender also includes a receiver responsive to a signal at a second frequency from the control circuit for terminating the operation of the control transmitter.

Abstract: An apparatus for adjusting the mutual distance of several movable elements placed side by side wherein control means are provided to insure that the various movable elements move in a transposition operation, the same distance as determined by measuring means which measure the distance which a first movable element moves. The device includes means for repositioning the relative position of the movable elements such that following the repositioning operation, the various movable elements are maintained at a fixed relative distance from one another, the repositioning being conducted by measuring the distance by which a first movable elements moves and moving the related movable elements in response.

Abstract: Tool offset compensation for a commanded path for a two axes NC system that produces movement by axis determination of sequential steps, is provided by having the tool offset the desired value, placing the tool center in the same quadrant as the direction of the commanded path and then making the tool center normal to the beginning of the commanded path. For a linear commanded path, the NC system then produces the commanded path while for an arcuate commanded path, the radius of the movement path produced is made to be the algebraic sum of the commanded path and tool center radii with additional incremental alterations without a corresponding movement being made in the numerical extent of the commanded path to utilize the same numerical extent for controlling the extent of the movement path.

Abstract: A proportional motor control circuit for supplying bidirectional drive to a motor as a function of variations of a sensed parameter includes a temperature sensing amplifier which is responsive to an error signal indicative of deviations of the parameter from a set point to provide an output signal representing the direction and amount of the deviation, and a pair of operational amplifiers, each of which serves as a load for the other amplifier, which are responsive to the signal output of the temperature sensing amplifier to determine the polarity of the energizing potential applied to a D.C. motor over motor drive circuits. The motor control circuit is described with reference to an application in an environmental control system to effect positioning of dampers located in air ducts for supplying heated or cooled air to an area in response to changes in the air temperature in the area.

Abstract: A counter-pointer display of aircraft altitude is driven by a servo in accordance with a digital representation of height provided at regular intervals by an air-data computer. The content of a first register is updated regularly with the height representation, and the difference between this and the content of a second register is entered into a third register. The content of the second register is updated rapidly from a shaft encoder that is coupled to be driven together with the counter-pointer display by a stepping motor, and the content of the third register is updated in synchronism with the updating of the first register to staticize the error between the input height-representation and the output representation provided by the counter-pointer display.

Abstract: A linear driving circuit includes a full bridge drive circuit across which a d.c. motor is connected. Each side of the bridge circuit is controlled by an associated complementary transistor loop, each of which is in turn controlled by an associated control operational amplifier. Each control operational amplifier is referred at one-half the voltage across the bridge circuit by a common voltage divider. The currents through each half of the bridge circuit are compared to provide current feedback.

Abstract: A drive system for a high-inertia load, such as a motor vehicle including a fly-wheel, comprises a prime-mover for setting the high-inertia body into motion and for maintaining the motion thereof during the operation of the drive system, a driven device driven by the high-inertia body, a bi-directional variable speed unit coupling the high-inertia body to the driven device for controlling its speed during the operation of the drive system such that when the driven device is accelerating it draws energy from the high-inertia body, and when it is decelerating it returns energy to the high-inertia body, and a control system automatically controlling the prime-mover to supply sufficient energy to the high-inertia body to make up for losses. Two types of control systems are described, one being energy-responsive, and the other being power-responsive.

Abstract: The method modifies the coupling of the elements of electrochemical generator by commutating means enabling, according to the conditions of operation, the coupling of at least two groups, for example identical, of said elements either in parallel, or in series. The commutating means are actuated, as a function of at least one of the parameters of the power demanded at the motor, in such a way that whatever the rotary speed of the motor, parallel coupling is effected in all cases where the power demanded can be supplied by this coupling. A signal of the power demanded is established as a function of at least one parameter of the power actually delivered, and of at least one threshold signal corresponding to the maximum value which the abovesaid parameter can take, all things being otherwise equal, in parallel coupling.

Abstract: A transistor circuit including a capacitor charging circuit and an actuator such as an electric motor provides a two part cyclic timing circuit, one part being one complete revolution of the motor and the other part being the charging time of the capacitor. The entire device is designed to run for an extended period on two dry cells. Practically no current is drawn while the motor is at rest contributing to a long battery life.

Abstract: A control system for a grinding machine or other machine tool, wherein desired workpiece profiles are stored in a digital computer which controls the position of a tool in relation to a workpiece in accordance with the stored profile and in accordance with the position of a workpiece profile follower to compensate for tool wear.

Abstract: A servo-motor connected with potentiometers to be balanced is used for controlling the diameter of an iris of a lens system of variable focal length. One potentiometer to be used for detecting the position of control is connected with a plurality of change-over switches by way of different resistors. The change-over switches are changed in response to the change of the focal length to correct the iris with reference to the changed focal length.

Abstract: A device for automatically controlling an electroerosion cutting machine in which a unit for selecting a direction of rotation of drive motors in the course of erosion working, includes a coincidence circuit and a reversible ring shift register whose outputs are connected to inputs of the coincidence circuit, whereas the latter's outputs are electrically coupled to coordinate drive motors which move an electroerosion tool relative to the workpiece, and an optical head relative to a coordinate follow table. The optical head is electrically connected to the register and coincidence circuit via a first amplifier having four divided outputs, two of which are connected to respective inputs of the ring shift register, whereas the remaining two are connected to the inputs of the coincidence circuit.

Abstract: A numerical control contouring system in which successive path segments are executed according to successive blocks of command signals making up a path program, the system being interruptable at any time by a feedhold signal to stop the controlled movable member at a random point on the path. The system is characterized by the improvement of preventing the system from resuming normal operation unless and until the member is returned to the path stopping point after it has been, for any reason, displaced therefrom under manual control or the like. In one embodiment, the axis component displacements of the member from the stopping point are represented by signals created and displayed, and the operator's restart pushbutton switch is rendered ineffective until the displayed displacement signals are reduced to zero.

Abstract: A plurality of stepper motors are energized one at a time in any order by repeating sets of drive pulses generated by a single motor controller. The actual winding state of each motor is stored in a memory unit. Upon selecting the next motor the controller is cycled until the actual motor winding state and controller winding state compare. The selected motor is then switched and moved by steps to a commanded position while entering new motor winding state data into the memory unit.

Abstract: A motor control circuit is arranged to provide selected control signals for operating a motor to rotate a motor shaft in a predetermined direction until the motor control circuit provides a high frequency control signal for substantially stopping motor operation.

Abstract: A control system for positioning a machine member in accordance with a set of predetermined instructions corresponding to a prescribed path of movement of the machine member includes first and second motor driving means operative in two mutually perpendicular directions to drive the machine member, pulse generating means to actuate the motor driving means, and a contour logic circuit to enable operation of the motor driving means in such a way that the machine member follows a staircase path closely conforming to the prescribed path. Drive of the first motor driving means is continuously maintained and drive of the second motor driving means is permitted only when required, then drive of the second motor driving means is continuously maintained and drive of the first motor driving means is permitted only when required.

Abstract: A d-c motor drive system, useful for propelling and retarding electrically propelled traction vehicles, wherein the armature winding has a first terminal coupled through an armature chopper to a first polarity conductor of a d-c source, and a second terminal coupled through a breaker switch to a second polarity conductor of the d-c source. First and second controlled rectifiers are connected across the first and second conductors in a self commutating circuit such that they conduct sequentially and alternatively. Means are provided for varying their respective conduction time intervals to control the voltage at their junction. Field winding means are coupled from the junction of the controlled rectifiers to the junction of the armature second terminal and the breaker. During the motoring mode with the breaker closed field current flows in a first direction.

Abstract: A control apparatus for manufacturing or treatment processes in which articles or batches of articles are conveyed through a process station on endless conveyor means. The apparatus comprises electrical signal producing means for producing at its output an article or batch digital signal dependent upon the length of the conveyor means associated with one article or batch of articles. Electrical reference means capable of being set with a digital value representing the effective length of the conveyor means are provided together with electrical comparator means for receiving the signals at the outputs of said signal producing means and said reference means and for determining whether the effective length of the conveyor is an exact multiple of the length associated with the article or batch.

Abstract: A wire bonding system is disclosed wherein a patterned substrate to be bonded is composed of at least two materials having different emission rates of infra-red rays, and a point to be bonded on the patterned substrate is positioned so as to coincide with a predetermined reference position. The present invention includes a servo-mechanism, which moves the patterned substrate, and a detecting element which scans the surface of the patterned substrate in a linear direction and detects the infra-red rays radiated therefrom. A pattern figure is obtained by using the differences in the emission rate of the infra-red rays caused by the material of the pattern. A signal which indicates the pattern figure is compared with another signal which indicates the reference position, and a control signal, corresponding to the difference between the point on the pattern to be bonded and the reference position, is obtained.

Abstract: Movements of a table are optically recorded on film by mechanically gearing movement of the table to rotate a drum provided with a peripheral row of slots positioned above the film. A light is directed through the slots onto the film as the film is moved and the drum rotated thereby exposing the film to bars of light images which are skewed in accordance with the relative rate of rotation of the drum and speed of movement of the film. Playback is accomplished by developing the film and then passing light through the clear film between the new opaque exposed bars of light images on the film and slots in the drum to suitable photo-cells. During playback the film may be moved at a constant speed and the drum will remain in synchronism with the film and in view of its direct gearing to the table, the table will follow movements determined by the pattern on the film.