Abstract: A circuit for multiplying two variables wherein one variable is represented by the pulse width of the pulses of a variable pulse width, constant frequency rectangular waveform signal and the second variable is represented by the level of a variable amplitude signal. When the value of the first variable is zero, pulses of the rectangular waveform signal have a definite non-zero pulse width. An oscillator cicuit produces a reference rectangular waveform signal having a frequency equal to that of the first rectangular waveform signal. From these two rectangular waveform signals there is developed a third rectangular waveform signal having the same frequency but having the width of its pulses directly proportional to the value of the first variable so that the pulses are of zero width when the first variable is zero.

Abstract: An electronic spark timing advance controller for variably controlling the degree of advance or retardation of the firing event of an internal combustion engine integrates an engine speed signal to produce a signal, which is proportional to engine angular position and is reset at a predetermined reference point or angular position of the engine prior to the firing of each cylinder of the engine. A signal, which is proportional to a predetermined firing angle of the engine, is compared with the engine angular position signal to produce an output signal, which is supplied to spark generating means to produce a spark when the compared signals have a predetermined relation to each other. Additional signals, which vary in accordance with a predetermined engine speed advance characteristic and a predetermined engine vacuum advance characteristic, affect the comparison to vary the firing angle of the engine in accordance with the corresponding engine operating parameters.

Abstract: Low friction material particularly adapted for use at high temperatures in the regenerator portion of gas turbine engines, the material comprising a work surface layer on a substrate, the work surface layer prior to a break-in period comprising an iron oxide (wustite--FeO, magnetite--Fe.sub.3 O.sub.4, or hematite--Fe.sub.2 O.sub.3) matrix containing an interspersed trapping material in the interstices thereof, the trapping material comprising an inorganic compound such as a salt or oxide; and subsequent to the break-in period, the work surface layer acquires a substantially continuous film of hematite--Fe.sub.2 O.sub.3 iron oxide in which the hexagonal Fe.sub.2 O.sub.3 crystals or cells provide a highly oriented structure. Transfer of the oriented film to the mating surface occurs during run-in.

Abstract: There is disclosed a method of analyzing formability, strain level, or a related physical characteristic of a given material for a blank which is formed into a desired shape comprising: providing a blank of said given material; applying a flowable photoelastic coating directly on a selected surface area of the blank which is to be analyzed and allowing the coating to cure; forming the blank into the desired shape, and subjecting the coating to analysis. Also disclosed is a novel calibration technique for quantitatively analyzing strain in the plastic region of the metal.

Abstract: A separate throttle within each of a pair of air inlet passages for an automobile internal combustion engine comprises a variable restriction diffuser designed for sonic velocity gas flow through its region of maximum restriction throughout substantially the entire operating range of the engine. The diffuser in one of the pair of passages comprises a movable orifice member and a fixed closure member. The diffuser in the other of said passages comprises a fixed orifice member and a movable closure member.

Abstract: There is disclosed circuitry for developing ramp type signals such as sawtooth waveforms, triangular waveforms, etc. The circuitry comprises an oscillator which supplies an oscillating signal to an up/down binary counter which counts occurrences of said signal. The binary output of the counter is converted into an analog signal and supplied to an output buffer stage. An offset control is associated with the output stage whereby an offset may be introduced into the output signal produced by the output stage. A strobe control is also associated with the output stage for providing selective transmission of the output signal of the stage to an output terminal in accordance with a strobe control signal applied to the output stage. The strobe control signal and the offset control signal determine the output signal waveform shape.

Abstract: An electronic ignition controller using a Hall Effect pickup Device for use in a ballast-resistorless, inductive-type ignition system for an automotive vehicle internal combustion engine and featuring an automatic shut-down timer, which operates to block the energization of the ignition coil if the controller remains in a state of conduction that maintains the ignition coil energized for a predetermined prolonged period of time that is greater than the dwell period or ON time of the coil at engine cranking speeds.

Abstract: A control system for an internal combustion engine provides controlled engine spark timing which is a function of a plurality of individual timing signals. These individual signals include a throttle advance signal, a programmed vacuum advance signal, a break-idle advance signal, an engine start advance signal, an engine speed advance signal and a fixed timing signal. These signals are algebraically summed together to develop a resultant spark timing signal representing desired spark timing. Individual signals are derived from transducer circuits which are responsive to various engine operating and/or ambient conditions. The throttle advance signal is a function of both a throttle position signal and a throttle rate signal and provides increasing advance as the throttle increasingly opens. It is also attenuated as the temperature of ambient air entering the engine for combustion increases.

Abstract: An integrator circuit is reset at predetermined engine crank angles to develop a sawtooth waveform representing engine crank angle. A comparator circuit, including an adjustable, voltage source output, is connected in a closed feedback loop around the integrator to regulate the peak of the sawtooth to a predetermined magnitude which is independent of engine speed, and, hence, independent of the sawtooth frequency. The analog output of the comparator represents engine speed. An adjustable calibration resistor in the integrator adjusts the integrator output to secure a desired relationship between the output of the comparator circuit and the frequency of the sawtooth. The complete circuit requires only two operational amplifiers and a small number of passive circuit elements.

Abstract: A novel electronic control circuit which may be used in different types of electronic engine control systems is disclosed. Illustrative usage in various types of electronic spark timing control systems contemplates 4, 6, and 8 cylinder engine configurations as well as single or multiple pick-ups. The circuit is intended for fabrication as an integrated circuit device to provide a low-cost unit which is advantageous in mass production usage.

Abstract: A gas make-up conduit extends to the crankcase of an internal combustion engine from the latter's fuel and air supply conduit at a location upstream of the throttle valve in said conduit and downstream of the fuel supply into said conduit to supply a mixture of fuel and air to the crankcase in the same ratio that is supplied to the engine, thereby to replace gases that are recycled according to conventional practice from the crankcase into the induction conduit downstream of the throttle valve.

Abstract: An arrangement for mounting a fuel metering control pump on an internal combustion engine comprises the air intake system via which air is drawn into the engine, said system including a generally annular support element on which the control pump mounts. Means are provided for mounting the annular support element on the intake manifold of the engine with induction air passing through a central aperture defined by the inner periphery of the annular support element. The control pump is disposed adjacent this aperture and meters fuel via a suitable fuel distribution system into the induction air stream to form the combustible mixture for the engine. The control pump includes an inlet port which passes through an opening in the wall of the annular support element to provide for connection of a fuel supply line thereto exteriorly of the air intake system. A similar arrangement is provided for a return line to the fuel tank.

Abstract: A method comprising the application of colloidally suspended graphite emulsified in water as a parting agent to hot surfaces and in particular to ladles to facilitate pouring therefrom and the formation of sound castings.

Abstract: A solid state sequence logic circuit comprising a plurality of NOR gates fabricated on a single silicon chip generates an electrical signal whenever a seat belt switch is actuated indicating the utilization of the seat belt before a corresponding seat switch is actuated indicating the presence of an occupant. This logic circuit, while primarily intended for use in any type of vehicle, is applicable to determine whenever a pluraity of events takes place in an order other than a predetermined order.

Abstract: Automatic Power Transmission apparatus having output members extending in opposite directions to and generally parallel to the axis of rotation of the engine crankshaft. A transfer shaft has a gear on opposite ends thereof to transfer the output of one portion of the drive train back to another portion of the drive train which is located in general planar alignment with the input to the apparatus.

Abstract: A roll-over valve utilizing a caged ball for positionally responsive actuation.

Abstract: A method of forming high strength aluminum alloys wherein ductility is increased only during forming and the resultant product exhibit minimal strength loss.

Abstract: A resiliently deformable crash resistant seal is provided between an automobile gasoline tank and a filler tube for the tank, wherein the filler tube may freely slide axially with respect to the seal without disrupting the latter or rupturing any fixed connection between the tank, tube and seal.

Abstract: An electronic engine control system comprises a central microprocessor integrated circuit, a program memory integrated circuit, and a programmable read only memory integrated circuit. The central microprocessor integrated circuit carries out calculations used in controlling an event associated with the engine according to a basic program contained in the program memory integrated circuit. The programmable read only memory integrated circuit is programmed to tailor the basic program contained in the program memory integrated circuit for the particular engine with which the electronic control system is utilized.

Abstract: Hydraulic governor having two centrifugal force controlled valves connected to a transmission output shaft. A relay valve is attached to the transmission case and connected hydraulically to the governor. Line pressure fluid supplied to the relay valve is modified to a value relating to the speed of rotation of the output shaft by the centrifugal force controlled valves in the governor.