Abstract: A permanent magnet rotor construction technique resulting in a rotor having excellent stiffness characteristics and being capable of higher speeds and longer lengths is disclosed. The rotor is constructed using nonfusion bonding techniques whereby an inner cylinder of magnetizable material is bonded inside a hollow outer cylinder of non-magnetizable material, with the resulting assembly having cylindrical end pieces also of non-magnetizable material bonded at each end. Pockets for receiving the rare earth permanent magents are then machined through the outer cylinder, and the magnets are mounted in the pockets in contact with the magnetizable material of the inner cylinder. Construction of the rotor is completed by installing a thin cylindrical shell over the permanent magnets in the areas of the rotor adjacent thereto.

Abstract: This invention controls the air pressure in an aircraft cabin in response to a selected landing field altitude and to a selected maximum permissible cabin pressure rate.

Abstract: A limited authority system for controlling engine performance in accordance with energy or thrust requirements in response to engine parameters which is capable of operating in a number of control modes.

Abstract: A permanent magnet rotor having a unitary aluminum casting surrounding magnets mounted on the shaft which has favorable heat transfer, performance, and cost characteristics, and which may be constructed by the accompanying method.

Abstract: Apparatus and method for laser hardening flank and root areas of gears are disclosed which utilize a non-linear scanning technique to produce a laser light bar which may be traversed over the flank and root areas of the gear to produce uniform case depth while preventing back-tempering by directing coolant flow on to gear tooth flanks opposite those currently being hardened.

Abstract: An apparatus and method is disclosed whereby a high power laser beam is mechanically split into two substantially identical beams which are focused and directed onto opposite working surfaces of a workpiece to simultaneously harden both working surfaces, thereby preventing back-temper.

Abstract: A control circuit for a brushless DC motor providing positive control in all four quadrants of motor operation. The circuit provides control of motor current, thereby controlling motor torque, in response to an applied current command signal, relying solely on feedback signals of motor current and rotor angle. The heart of the system is a level dependent logic stage which selectively controls the states of the switches applying power to the motor windings in accordance with a current error signal developed by reference to the feedback current signal. The control circuit causes the motor current to correspond to any applied current command and works at any motor speed and torque for rotation in either direction.

Abstract: A gas generator having a one-way ratchet assembly is disclosed which compensates for compaction and degradation in the catalyst bed to reduce destructive oscillatory vibration in the gas generator, thereby substantially extending the life and assuring dependable performance of the gas generator.

Abstract: A variable speed induction motor drive system operating at a leading power factor. A prescribed reactive power is coupled to the motor's rotor, to permit line commutation of an inverter supplying the motor's stator, and to permit the inverter to be supplied by a substantially constant dc link voltage.

Abstract: A variable-speed, leading power factor AC machine which may be supplied through a line-commutated inverter.

Abstract: A low voltage, high frequency actuator for correcting distortions in laser optics systems.

Abstract: An interpole for a direct current dynamoelectric machine is provided at the tip thereof with a flux shift winding, or windings, to effect a shifted magnetic flux strength to counteract induced voltages of the commutated armature coils moving through the commutating zone.

Abstract: A fluidic thruster control system and method for guided missiles and the like, which utilizes a fluidic jet interaction device for controlling a downstream fluidic vortex amplifier to modulate exhaust flow through thrust nozzles.

Abstract: The discharge of a capacitor energizes a relay to actuate the dump valve of a braking system to interrupt braking action upon the occurrence of wheel slide.

Abstract: A differential throttle linkage control for controlling the flow of fuel to an engine receives a main input from the throttle lever, and a second input from a trim actuator motor through a movable portion of a programmed split cam. The throttle control algebraically sums the inputs to produce a single output operably connected to the fuel metering device of the engine. The programmed split cam modifies or neutralizes the effects of the trim input through selected ranges of the throttle lever input stroke.

Abstract: A pulse width modulated three-phase inverter has notches in the output waveforms to control the harmonic content thereof.