Abstract: A control unit, adapted to control a reversible, variable-speed electrical motor includes a control lever protruding through a U-shaped slot in a housing. Movement of the lever from one side to the other of the U-shaped slot controls the direction of rotation of the motor, and its position along a side of a slot determines the speed of rotation. The control lever is mounted to a pivotally mounted support member, which carries a linear potentiometer operated by the control lever, and includes a protruding portion which carries a toggle switch. The handle of the toggle switch is substantially restrained from motion, so that the switch is actuated to reverse the motor when the control lever is moved from one side of the U-shaped slot to the other.

Abstract: A vacuum operated idle speed control device (26) for use on internal combustion engines to regulate the idle speed of the engine at the lowest operating speed. A controlled or sized input orifice (48) to the device (26) permits the basic valve body (38) to be used on different engine sizes. The diaphragm (42) modulates under control of an electromechanical vacuum control valve to provide the correct amount of pressure opening and closing the device (26). The vacuum operated idle speed control device (26) may include the vacuum control valve as an integral component.

Abstract: A vacuum check valve comprising a single umbrella valve responding to vacuum differences between the input and output of the check valve. The check valve directs the output line to feed a vacuum operated device with either the vacuum source or reference air through a bleed passage. The umbrella shaped valve eliminates the requirement for a diaphragm operated poppet valve.

Abstract: A supercharging system for an internal combustion engine, consisting of a positive displacement air pump mechanically driven by the engine, and an electromagnetic clutch activated during high torque demand operating conditions. The system produces a high torque output in a high torque demand range from a relatively small displacement engine, with economy operation during normal engine operating conditions. A flow modulation control system provides a smooth transition from natural aspiration to supercharged operating conditions and includes a sensing of the pressure drop across the throttle plate and modulation of the supercharger air flow into the engine intake in accordance with the sensed pressure differential. The flow modulation also enables high efficiency supercharging with the engine operating under partial pressure supercharging as required in ascending a grade.

Abstract: A rate sensor is disclosd for use in applications requiring high reliability such as in aircraft or tank gun stabilization systems. The rate sensor consists of a sensor rotor supported within a volume of magnetic fluid contained in a sensor housing to which is applied a magnetic field, levitating the sensor rotor in a central location within the housing cavity. A plurality of sensor means are provided positioned about the axis of the sensor rotor detecting the relative movement between the sensor rotor and the sensor housing occurring upon rotation of the housing from which an output signal corresponding to the rate of change of rotation of the housing.