Abstract: An anti-log power amplifier for energizing a reversible electric motor of an electrically assisted power steering system for an automotive vehicle. The power amplifier has a preamplifier which amplifies the output signal of a torque sensor detecting the torque applied to the vehicle's steering wheel, an anti-log signal generator exponentially modifying the amplified output signal, a pulse width modulator converting the exponentially modified signal to a pair of complementary pulse width signals, and a pair of bridged power amplifiers for energizing the reversible electric motor in response to the complementary pulse width signal. The bridged power amplifiers are further responsive to the exponentially modified signal for increasing the electrical power delivered to the reversible electric motor under high torque loads.

Abstract: A slot (11) or a cutaway portion that includes an end surface (41) in an outer sleeve (10 or 40, 50) to provide an opening for a projection (25) in an inner sleeve so that the inner sleeve (20) may be located in a predetermined position within the outer sleeve (10) or sleeves (40, 50). A final outer sleeve (30) then is formed over a shoulder (42) of outer sleeve (40) to lock all the sleeves together. This eliminates the need for crimping the sleeves together.

Abstract: A composition for forming a resistive type oxygen sensing element and a method for forming such elements, wherein a mixture of titanium dioxide, glass frit and platinum are used, the titanium dioxide having a particle size within a specific range, and a particular ratio to the other two components of the mixture. The composition is screened over printed platinum leads on a ceramic substrate, with a resistor material also used as a thermistor, and the resistive materials having their own conductive leads in addition to a common lead to the terminals of an oxygen sensor.

Abstract: A linear sweep frequency modulator for a varactor tuned transistor microwave oscillator used in an FM/CW radio altimeter where the oscillator-frequency v. varactor bias characteristic is non-linear. A linear triangular wave is converted by means of a function generator to the non-linear wave required for varactor bias to cause linear frequency modulation of the oscillator. Linearity of modulation is tested by measuring variations in the period of a calibration signal derived from a delay line. Variations in the period of the calibration signal are measured by determining the difference between the average and the instantaneous calibration period and sampling the difference during each cycle of the triangular wave, once during the upswing thereof when the oscillator is at low frequency and once during the down swing thereof when the oscillator is at high frequency and separately integrating the up swing and down swing samples.

Abstract: A plurality of longitudinally housed looped spring members (340) are pivotally supported by a wire (350) circumposed about a plurality of ratchet teeth (150) defining a contiguous succession of longitudinal peaks and valleys (154, 152) for interengagement, the spring members including a straight end portion (342) advanced around the peaks and valleys and a curved end portion (344) normally out of engagement with the ratchet teeth, the wire being supported in an annular groove (331) of a coupling nut (300) rotatably mounted to one shell (100) of an electrical connector assembly comprising a pair of shells (100, 200), the forward end face (222) of the second shell being drawn against the curved end portion (344) to drive the straight end portion (342) downwardly into the ratchet teeth when mating engagement has been achieved, the bias of the straight end portions (342) resisting rotation of the coupling nut.

Abstract: The invention is an electrical connector that has a forwardly removable coupling ring (30). The coupling ring (30) is characterized by annular members (31, 32) that are connected together by one or more removable fasteners (50, 51) and held in place in front of the housing flange (11) by a snap ring (40) located in a groove (12) in the housing (10).

Abstract: A typical coaxial circuit which couples a negative resistance diode to the cavity of a power combiner consists of a metallic rod which is biased by a spring against the diode supported by a carrier which is effective to vary the position of the diode along the longitudinal axis of the rod. The rod cooperates with bores in a block to comprise, in series, between the diode and the cavity, a transmission line whose length varies in accordance with diode position, a fixed impedance transformer and a fixed length transmission line.

Abstract: A frequency translator receives an input frequency signal and an offset frequency signal, and processes the signals digitally in order to obtain an output from a multiplexer. Pulse trains derived from the input frequency are provided to an N-bit shift register. The outputs from the shift register are provided to a multiplexer which is controlled by count signals from the offset frequency. The multiplexer provides, as its output, a single sideband output at a frequency equal to (f.sub.c -f.sub.os)/N, or (f.sub.c +f.sub.os)/N.

Abstract: A unit injector having a mechanically driven piston and a remotely situated metering piston situated in a bore. The interplunger volume defining a timing chamber and the volume below the metering piston defining a metering chamber. The injector further including a single electrically responsive valve for controlling the functions of injection timing and fuel metering and a single dump port fabricated in the walls of the bore for relieving the fuel pressure on the timing chamber which correspondingly permits the pressure of fuel in the metering chamber to be decreased.

Abstract: A system for transmitting an EPR (Engine Pressure Ratio) from a gas turbine is provided with a resolver component (30) which modifies the EPR in accordance with variations in the optimum EPR for a particular turbine under particular conditions. The information from an EPR gauge is transmitted by a synchro transmitter, and is received by a differential transmitter (31) associated with the particular engine being monitored. The differential transmitter (31) is adjusted in accordance with pressure (at 33) and temperature (at 56) conditions in order to provide an EPR reading which is compensated in accordance with actual conditions of pressure and temperature. The differential transmitter (31) is also adjusted (at 45) in order to provide an output which is further varied in accordance with a variation in the optimum EPR under standard conditions for the particular turbine associated with the differential transmitter.

Abstract: A measurement system for converting the outputs of dissimilar transducers into digital numbers by means of a phase conversion technique. The outputs of a plurality of dissimilar transducers are generated as pairs of amplitude modulated sinusoidal signals. All AM signal pairs are converted into phase modulated signal pairs by a plurality of identical conversion circuits where the phase difference between at least one PM signal pair is linearly related to the measured parameter of the transducer associated therewith. The phase differences for each transducer is converted into a digital number by counting increments of time between the zero crossings of each pair of phase modulated signals and outputting the resulting count to a data buss of a control processor. Transducer parameters which are nonlinearly related to their phase differences are compensated by a correction factor which is calculated by knowing the error between any particular measured input and the linear input.

Abstract: A seal assembly (54) for closing a cavity (55) between a rotor (24), a bearing retainer (38) and a crankshaft (80) to retain a fluid therein for lubricating bearings (48, 50, 90) associated with the crankshaft (80). Seal assembly (54) has a disc (72) with a first resilient member (56) that engages the rotor surface (44) and a second eccentrically positioned resilient member (62), that engages surface (65) on bearing retainer (38). Disc (72) which is attached to crankshaft (80) rotates with ring gear (36) around pinion (32) to maintain a sealed cavity (55) even though the first and second resilient members (56 and 62) rotate on their respectively sealing surfaces (44 and 65) with different revolutions per minute.

Abstract: A brake booster (16) includes a housing (26) with a plurality of parallel bores (38, 40, 42). A first piston (50) is disposed in the bore (38), a second piston (56) is disposed in the bore (40) and a valve assembly (74) is disposed in the bore (42) to control communication of fluid pressure to a pair of working chambers (52, 58) within the bores (38, 40). A pair of connecting pins (130, 132) cooperate with a plunger (100) to transmit a reaction force to a vehicle operator.

Abstract: A two-stage pneumatic servo valve assembly for controlling an output motor is disclosed. An input device, such as a torque motor, is coupled to the two-stage servo valve assembly. The first stage of the servo valve assembly includes a vane valve movable by the output of the torque motor to selectively provide a fluid path from an input source to one of the first-stage output channels. The first-stage pneumatic servo valve is coupled with a second stage servo valve. The second stage servo valve controls fluid flow from a pneumatic fluid source to an output motor. The second stage servo valve includes a slidable spool valve movable by fluid received from the first-stage servo valve. A feedback control from the second-stage servo valve to the first-stage servo valve is provided. A second feedback control is provided from the output of the output motor to the first stage servo valve.

Abstract: An electrical connector assembly including a pair of mating shells (100, 200) having end faces (122, 224) on dielectric inserts (110, 210) and a coupling nut (300) rotatably mounted on first shell (100), coupling nut (300) including an elongated a generally U-shaped passageway (142, 146, 144) sized to receive a coupling pin (280) on second shell (200), the passageway forming an integral cantilevered latch spring (160) of the type having adjacent its deflectable end a detent (162) for captivating the pin (280), rotation of coupling nut (300) bringing end faces (122, 224) into abutment to stop axial advance but permit continued rotation to allow coupling pin (280) to advance along the passageway to deflect latch spring (162) downwardly and reach the detent (162) whereupon latch spring (162) springs forwardly to captivate coupling pin (280) therein.

Abstract: A cable assembly connects an input member (20) with a clutch assembly 10. The cable assembly comprises a sheath (30) enclosing a cable (34). An automatic adjuster 24 connects the cable (34) with a clutch lever (16) and the automatic adjuster is actuated by a bracket (92) to provide for extension between the cable (34) and the lever (16) in order to accommodate wear for the clutch assembly.

Abstract: An electrical connector assembly of separable first and second shells (100, 200) and a coupling nut (300) having a radial flange (340) rotatably mounted about first shell (100) and rearwardly of an annular shoulder (140) thereof with a coil spring (500) and an annular ring (400) mounted for sliding disposed between flange (340) and shoulder (140) for resisting unwanted rotation. Annular shoulder (140) and annular ring (400) have frusto-conical tapered faces (150, 420) to define therebetween a Vee-shaped vise for longitudinally squeezing the coil spring (500) and camming the spring radially outwardly from snug contacting fitment with the shell (100) and against an inner wall (322) of the coupling nut whereby frictional contact spring (500) against itself and portions of the coupling nut (300) resist rotation.

Abstract: A combustible gas detection system in which remotely located combustible gas sensors of the analog type are monitored by a central controller. The sensor analog data is converted to digital data and transmitted to the controller. The controller tests the integrity and validity of data received from the sensor, identifies the nature of any faults therein and vocally signals the cause of such faults. The controller computes the concentration of combustible gas at the sensor and automatically determines sensor calibration constants from received sensor data.

Abstract: An electrical connector assembly (100) includes a coupling ring (50) for connecting together two connector housings (10, 20) and self-contained means for resisting rotation of the coupling ring relative to the connector housing (20) to which it is rotatably mounted. The resisting means includes coupling ring (50) and connector housing (20) respectively, frusto-conical surfaces (72, 82) with protuberances (74) and sockets (84), in faced relation, the protuberances being adapted to be received in and rotated to succeeding sockets. The compressible plastic is such that as the housings are drawn into tight engagement the protuberances on the coupling ring engage the plastic surface on the other connector housing (10), causing the protuberances and surfaces to elastically compress.

Abstract: A fuel injection system employing digital logic to generate injection command pulses of a time duration calculated to provide a precise quantity of fuel to meet presently existing, varying engine requirements is disclosed herein. The system employs a first or injector selection circuit operative to select an injector or injector group for injection and a second or adaptive delay circuit to generate an injection command. The circuits are electronically intercoupled to provide for substantially simultaneous application of the selection pulse and injection pulse to the proper injector group and to eliminate the need for a mechanical distributor arrangement to select the proper injector group. The time duration or delay signal is generated by a function generator producing an output as a known function of time with injection occurring during the time it takes for the output to reach a pre-determined, selected, threshold value.