Abstract: A half wave and full wave energization system for permanent magnet D.C. motors employing a hand trigger operated switch which commutates terminals of a full wave rectifier bridge when connected to a source of A.C. supply to provide selectively half wave and full wave energization of such motors when the trigger is depressed from an extended "off" position.

Abstract: A ground fault interrupter for two and three wire, single phase load circuits employing a circuit breaker having an electro-responsive contact trip-open mechanism, a fault sensing differential transformer, an operational amplifier providing characteristic output pulses whose magnitude depends upon the non-presence or presence of a ground fault and whether the latter is resistive or reactive in kind, and an energizing circuit for the electro-responsive contact trip-open mechanism including a transistor which is normally held non-conducting in the absence of a ground fault and rendered conducting whenever a resistive ground fault occurs. A capacitor in circuit with the amplifier output and transistor base renders the transistor immune from amplifier pulses characteristic of reactive ground faults. Varistors are included between the load circuit wires to suppress transient voltage surges from falsely inducing nuisance ground fault interrupting action.

Abstract: A transducer is disclosed which provides a digital indication of a sensed analog condition without the need of an analog to digital (A/D) converter or a comparator. A condition responsive element having a true abrupt switching characteristic at a known breakover voltage as a function of a condition being sensed is biased by a voltage source preferably supplying a periodic voltage as a known function of time. The point during the voltage source cycle at which the condition responsive element switches to its other state is determined by the sensed condition. Preferably, a clock of known frequency is enabled when the condition responsive element is in one of its states, whereby clock pulses are counted during an interval whose duration is determined by the sensed condition.

Abstract: Disclosed is a metering valve for a diesel engine fuel injection system. Two injection systems are shown which embody the valve. The valve includes a spool which is moved in one direction by a stepped cam and is moved in the other direction by a spring. The cam moves the spool at a velocity proportional to engine speed. The spring moves the spool at a velocity proportional to the spring force and independent of engine speed. A mechanical fuel distributor prevents fuel metering by the spool when the cam is moving the spool and allows fuel metering when the spring is moving the spool.

Abstract: A fluid coupling device, especially a viscous fan drive, of the type including an output coupling member defining a fluid operating chamber. The device includes an input coupling member rotatably disposed in the operating chamber and cooperating with the output member to define a shear space. The output coupling member defines an annular inner surface, at least a major portion of the inner surface cooperating with the axis of rotation to define an included angle between about 20 degrees and about 70 degrees. The input coupling member defines an annular outer surface, a major portion of which conforms generally to the angled inner surface of the output coupling member and is closely spaced apart therefrom. The fluid coupling device of the invention has a substantially reduced idle speed, without a loss of peak speed, as well as a greatly reduced pump-out time.

Abstract: A pilot fuel injection system for a diesel engine. One embodiment of the system includes a high pressure fuel pump, an accumulator, a mechanical fuel distributor, a pair of fuel metering valves for each cylinder of the engine, a fuel injection nozzle for each cylinder, and an electronic logic system for controlling actuation of the metering valves; in a second system embodiment a pair of the metering valves supply fuel to all of the engine cylinders. Several embodiments of the metering valve are disclosed, some of which allows exclusion of the mechanical fuel distributor from the system. All of the disclosed metering valves meter fuel from the pump to the nozzles by traversing a passage in a valving member across another passage. Motion is imparted to the valving member by electromagnetic means which are energized by the electronic logic. The logic is responsive to engine speed and throttle position.

Abstract: An automatic clearance adjuster for a cam actuated vehicle brake. The adjuster is disposed in a pivotal lever and includes a worm and worm gear, an adjusting mechanism for effecting a clearance decreasing rotation of the worm during the brake apply stroke and a clearance increasing rotation of the worm during the brake relesase stroke, a two-way torque limiting ratchet clutch which slips to prevent rotation of the worm by the adjusting mechanism when the shoes are in contact with the drum, and a roller clutch which allows a predetermined amount of clearance increasing rotation of the worm by the adjusting mechanism and then locks up and causes slippage of the torque limiting clutch to prevent further clearance increasing rotation of the worm.

Abstract: A valve having a body with two ports and a bore, a sleeve selectively movable within said bore and having two radially extending passages adapted for sequential communication with one of said ports upon movement of said sleeve, and a spool selectively movable within said sleeve and including a land to restrict fluid flow in said passages. The valve is used as a variable pressure control valve in a closed loop hydrostatic circuit to control the displacement of a variable displacement pump. The spool is actuated in response to a pressure difference between the high pressure and the low pressure lines of the circuit. The sleeve is manually movable. A charge pump is provided to provide control fluid to one of the ports of the valve whereby movement of the sleeve and spool within the body will result in the flow of fluid from the charge pump to one servo of the variable displacement pump and from the other servo to drain.

Abstract: An automatic clearance adjuster for a cam actuated vehicle brake. The adjuster is disposed in a pivotal lever and includes a worm and worm gear, an adjusting mechanism for effecting a clearance decreasing rotation of the worm during the brake apply stroke and a clearance increasing rotation of the worm during the brake release stroke, a two-way torque limiting ratchet clutch which slips to prevent rotation of the worm by the adjusting mechanism when the shoes are in contact with the drum, and a roller clutch which allows a predetermined amount of clearance increasing rotation of the worm by the adjusting mechanism during the brake release stroke and then locks up and causes slippage of the torque limiting clutch to prevent further clearance increasing rotation of the worm.

Abstract: A loading mechanism for placing blanks to be split in a pulley splitting machine having at least one work station in which a blank is to be located. The loading mechanism has a magazine adapted to hold a plurality of blanks to be split. A linearly moveable slide is mounted on the pulley splitting machine for receiving a blank to be split. The slide has locating means disposed thereon for locating the blank on the slide in a predetermined position. A pivoting loading arm is mounted near the work station. The arm has gripping means to individually remove blanks from said magazine and place them on the locating means.

Abstract: A small gas turbine engine having a small, high speed shaft assembly including a central shaft member, a radial outflow compressor rotor secured to one end of the central shaft member with its inlet end disposed outboard of the shaft assembly, and a radial inflow turbine rotor secured to the other end of the central shaft member with its discharge end disposed outboard of the shaft assembly. The shaft assembly is supported at its ends, outboard of the rotors, by a pair of bearings which are axially secured but allow limited radial movement of the shaft assembly. An annular combustor is disposed between the turbine and compressor rotors in encircling relation to the central shaft member. Fuel is supplied to the combustor chamber from the exhaust end of the turbine through an axial passage in the shaft assembly opening at one end outboard of the exhaust end bearing and communicating at its other end with radial ports in the central shaft member arranged to sling fuel into the combustor chamber.

Abstract: A semiconductor device is disclosed comprising a temperature sensitive thyristor thermally coupled to a power switching thyristor and electrically connected in parallel with the gate of the latter. The temperature sensitive thyristor senses the temperature of the power switching thyristor and automatically responds thereto above a predetermined temperature by shunting the gate current to prevent overheating of the power switching thyristor. The device may additionally include a second temperature sensitive thyristor having a lower switching temperature than the first mentioned thyristor and connected in series with the gate of the power switching thyristor whereby the latter may be triggered into conduction only within a defined temperature range bounded by the switching temperatures of the temperature sensitive thyristors. Normally off and normally on devices are also disclosed.