Abstract: A combination speedometer/odometer apparatus for displaying either the speed of a vehicle or the distance a vehicle has traveled, and including a speed pick-up attached to the vehicle for developing a first voltage signal having voltage spikes occurring at a frequency proportional to the speed of the vehicle; a pulse generator which develops a voltage pulse in response to each spike, the pulses having a predetermined duration; a signal generator controlled by the voltage pulses which develops a speed signal and a distance signal both having bursts of high-frequency signal, the number of bursts in the speed signal being proportional to the speed of the vehicle and the number of bursts in the distance signal being proportional to the total distance the vehicle has traveled; a first counter for counting the cycles of the speed signal, the counter initiating its count in response to a reset signal; a synchronizer for developing the reset signal a predetermined period of time after the occurrence of one of the vol

Abstract: An internal combustion engine performance analyzer is described for providing a numerical value representing certain operating characteristics such as spark plug ionization voltage, points closed voltage drop, alternator ripple output voltage and voltage drop across the starter during cranking. Simple connections to the engine provide the necessary signals to the solid state electronic analyzer. The analyzer includes appropriate switches, converters and a cylinder identification circuit in the form of a ring counter for enabling the several parameters to be conveniently measured and displayed in a digital format.

Abstract: A tachometer for measuring and comparing the angular velocity of a first and a second wheel of a vehicle includes means for sensing and generating a train of pulses for each of the wheels wherein the repetition rates of the pulse train varies in proportion to the angular velocity of the wheel. For each of the wheels a frequency doubler is provided for doubling the repetition rate of the pulse train of the varying repetition rates having pulses of the same pulse width and amplitude. For each wheel the frequency doubled pulse train is then integrated to provide a DC output. The two DC outputs for the two wheels are then compared, selected and applied to corresponding output terminals of the tachometer.

Abstract: An electrostatic discharge system for neutralizing the charge accumulated an aircraft utilizes a pair of unequal length probes to sense the intensity of the external electric field. A transformer arrangement energizes these probes with out-of-phase voltages such that the corona currents flow in opposite directions through these probes. The dual probe configuration eliminates any errors due to environmental changes, while the out-of-phase excitation mode allows the AC component of the output signal to be canceled at a load resistor in the sensor circuit by a subtractive process, a feature which greatly simplifies the filtering operation.

Abstract: Functional and parametric checks of a circuit to be tested are in effect conducted concurrently. Equivalent loads are connected to the circuit and the loads are programmable under control of a test system. In that way, various different fan-in and fan-out capabilities as well as other parameters of the circuit may be sequentially checked without disconnecting the system from the circuit and while functional testing is taking place.

Abstract: A testing system is removably connected to a control of an elevator system and selectively operated to perform a plurality of testing sequences. The testing system is removably connected with a closed loop elevator control and selectively and independently provides a number of artificial control signals characteristic of an operating condition for controlling the operation of the elevator system under test. The testing system may be used in a testing sequence with elevator systems employing gated rectifying circuits to accurately monitor gate pulses and other operating functions therein.

Abstract: An analyzer for an electrical vehicle control system which includes a self-contained power source to allow excitation and evaluation of individual components in the control system. The analyzer plugs into the control system and includes a plurality of switches for selectively connecting various output terminals of the analyzer to internal logic circuits for monitoring the operation of selected components of the control system on an individual basis.

Abstract: A compact voltage sensing device for connection to an alternating current high voltage circuit is imbedded within an organic polymeric insulator body that is formed to provide both mechanism support and "line to ground" insulation for a conductor or component connected thereto. The voltage sensing device comprises a capacitor and step-down transformer in series from the conductor to ground which provides a low voltage output which may be used to determine the magnitude of the voltage on the conductor, or as a source of control voltage for auxiliary apparatus. The insulator body may be made to be equal in height and have the same mounting configuration as a conventional insulator so that it can be substituted for a conventional insulator in a distribution system. The performance of the insulator body as insulation is not compromised by the presence of internal electrical components.

Abstract: Displacement metering with two independently metered fluid flows comprises displacing fluid in laminar filament flow from a first chamber through a second chamber into a third chamber, the chambers being separated by a pair of spaced walls provided with coaxially aligned orifices in communicating series relationship. Flow in filamentary form is effected from the first chamber through the orifices seriatim into the third chamber, and flow is effected from the second chamber through the second orifice into the third chamber in sheathing relation to the filamentary flow. Differential pressure effects the flow from first to third chamber independently but concurrently with positive displacement effecting flow from the second chamber into the third chamber.

Abstract: A device is provided for automatically selecting from a plurality of ranges of a scale of values to which a meter may be made responsive, that range which encompasses the value of an unknown parameter. A meter relay indicates whether the unknown is of greater or lesser value than the range to which the meter is then responsive. The rotatable part of a stepping relay is rotated in one direction or the other in response to the indication from the meter relay. Various positions of the rotatable part are associated with particular scales. Switching means are sensitive to the position of the rotatable part to couple the associated range to the meter.

Abstract: A test probe for effecting temporary electrical connection to circuit terminals of miniature integrated circuits or like elements with small inter-terminal spacings. The probe has an insulative tip having a cross-sectional dimension smaller than the space between adjacent terminals. In an axially extending groove in the tip is a stiff wire, and a mechanism is provided for controllably moving the wire out of the groove after the tip has been inserted between two terminals. When the wire moves out of the groove, it contacts one of the electric terminals and wedges the insulative tip against the adjacent terminal so as to retain the probe in place.

Abstract: A solid state light emitting display device utilizing two light emitting elements displayed in a single channel having ends in which each element is disposed closer to the ends of the channel than to each other.

Abstract: A digital tachometer provided with a measuring shaft to be brought into contact with a rotating body to be measured for simultaneous rotation therewith. As the shaft is rotated the number of rotations of the rotating object is digitally indicated and the indication remains even after the measuring shaft has been moved out of contact with the rotating object under measurement.

Abstract: A cold cathode ionization gauge controller utilizing a periodically varying potential across the gauge tube at higher pressure and substantially constant potential at low pressure provides a wide-range pressure measurement capability from about 10.sup.-.sup.1 to about 10.sup.-.sup.7 torr.

Abstract: A semiconductor sensor for fluids comprised of a body composed of an inorganic semiconductor material which is provided with a drain and source zone interconnected by a channel zone and including a layer of a reactive organic material capable of forming a reversible bond with at least a portion of the fluid being detected in the vicinity of the channel zone between the source and drain zones. The reactive organic material, such as carotenoids, polypropylenes, phthalocyanines, etc. reversably interacts with molecules of a given fluid substance and produce a reversible change in the surface potential of the layer composed of the organic material via a field effect and thus produce a reversible change of resistance in the channel zone and indicates the presence of such fluid by a change in the drain current of the sensor.

Abstract: In an ion implantation apparatus, means for forming multiple, separate parallel ion beams, each having a predetermined spot diameter, and means for focusing each of said ion beams upon a predetermined chip area of a target wafer whereby multiple chip areas upon the wafer can be simultaneously implanted with prescribed ion dosages.

Abstract: Toner concentration of an electrostatic developer is measured by disposing the developer between two electrodes and agitating the developer to produce electronic noise as a result of triboelectrification and measuring and determining from the generated noise the concentration of the developer.

Abstract: A cathodoluminescent gas discharge device having improved modulation characteristics whereby an electron beam generated by the device is more easily modulated by a small control voltage. The improved gas discharge device includes a cathode for generating a gas discharge to be used as a source of electrons. An electron-transmissive extraction grid is spaced from the cathode and receives an electrical potential for extracting electrons from the gas discharge. An electron-transmissive modulation grid is spaced from the extraction grid and receives a control voltage for modulating the flow of electrons through itself.

Abstract: Apparatus and method, utilizing an ion-selective electrode and a reference electrode, for determining the percentage volume of total particulates in a predetermined volume of a liquid medium or sample having an effective known concentration of a particular ion. The method includes introducing a predetermined volume of a diluent having a known concentration of that ion into the sample, and measuring with the electrodes the concentration of that ion in the diluted sample to indicate the percentage volume of total particulates in the sample. The apparatus and method for such determination are well suited for determining the percentage volume of total cells in a sample of whole blood.

Abstract: In a system for analyzing a gas mixture and including a semiconductor gas measuring sensor and an indicating element, a differential amplifier is connected in series between the sensor and the indicating element.