Abstract: A projectile control system for projectile guidance and control for use against moving targets, which allows the projectile to fly a minimum energy path to target intercept, applies corrective commands to the projectile as it approaches the target to correct the projectile in flight for errors in system "boresighting" and similar errors, and also to correct the ground control system on the basis of the same measurements so that these calibration errors will have a reduced degradation on the accuracy of subsequent projectiles, and uses the miss sensing process to improve prediction accuracy when unguided projectiles are fired from the same launcher so that the system has both a controlled projectile and an unguided projectile capablity, and both capabilities benefit from the miss sensing and data processing process.

Abstract: Disclosed herein is a fastening element which is susceptible of forming a fastener assembly by engagement with a self-tapping screw. An oblique rib is formed within a bore within a blank, or other structural element, close to the end of the bore. The rib is thus oriented at an angle with respect to the axis of the bore. The result is a rib of substantially eliptical configuration protruding radially inwardly into the bore exclusively from locations along a substantially elliptical closed-loop line upon the cyindrical surface of the bore, the closed-loop line having two turning points of reversal in axial direction component by virtue of the closed-loop line returning into itself. Also disclosed is a void in the rib, and dimensions of the fastener relative to standard externally threaded fasteners which are preferred for high strength and easy driving.

Abstract: A line voltage monitor for monitoring the voltage applied to electrical equipment and for providing an indication or protective disablement of the equipment in the event excessive variations occur in the line voltage. The line voltage monitor includes a steady state voltage sensing means and a transient voltage sensing means for detecting both types of voltage variations.

Abstract: An arrangement for spooling endless band material, particularly for the repeated projection of the full length of cinematograph film required for a complete programme formed as an endless loop, having two double spools each able to carry two film spirals. In a first half of the projection operation Spool 1, Spiral 1, is fed through the projector and taken up as Spool 2, Spiral 1. Simultaneously, Spool 1, Spiral 2, is directly rewound as Spool 2, Spiral 2. Both spools are then reversed and, in the second half of the projection operation, Spool 2, Spiral 2, is fed through the projector and taken up as Spool 1, Spiral 2, and Spool 2, Spiral 1, is directly rewound as Spool 1, Spiral 1. The initial state is re-established and the projection operation is continuously repeatable without rethreading the projector.

Abstract: The invention described herein relates to a method of making a threaded nut fastener which joins with a threaded male or screw fastener wherein the threads of the nut are partially formed so as to provide for up to 80% thread-to-thread engagement of the screw threads with the nut threads.

Abstract: A programmable character display module for the lighted display of changeable indicia, where the display can have particular use in a switch assembly.

Abstract: A method of manufacturing a threaded fastener of the self-tapping type is described, where the fastener has the conventional head, shank, and pilot end. The shank includes a helically wound thread member impregnated with a carbide or other, harder substance than the metal from which the fastener is made. A method of making a thread-cutting fastener having its pilot tip end impregnated, is also described. A method utilizing a thread-rolling machine with a unique impregnating electrode is disclosed. The electrode is shown to engage the fastener selectively during the thread-rolling operation itself.

Abstract: A method for controlling the output torque condition of an induction motor includes the steps of generating a slip frequency in the motor proportional to the desired output torque condition while simultaneously establishing the magnitude and phase displacement of the stator current at preselected values. The invention also obtains the speed control of self excited alternating current motors.