Abstract: An inspection method and apparatus for the deposition of a liquid material o a part in a manufacturing process. The method utilizes electrical continuity techniques to determine actual application and also controlling the dispensed volume of material.

Abstract: An automatic ranging clamp-on ammeter includes an openable normally closed magnetic core for encircling an A.C. current carrying cable has a measuring winding and a sensing winding. A current meter, a diode rectifier and a pair of variable first and second resistors are connected in series across the measuring winding. A relay solenoid is shunted by a Zener diode and is connected in series with a variable resistor across the sensing winding. A sensitivity reducing shunt variable resistor is connected through the relay normally open contacts betwen the junction of the first and second resistors and the meter opposite terminal. An audible signal generator may be connected across the shunt resistor. When the measured current exceeds a predetermined value the relay closes and inserts the shunt resistor across the meter to reduce the measuring sensitivity and increase its range and energizes the audible signal generator.

Abstract: A level indicating device having a plurality of diodes connected in series and a plurality of resistors connected in series with light emitting diodes connected between corresponding junctions of both series and means for applying a signal to be indicated to one end of one series and the other end of the other series.

Abstract: An elongated electric incandescent lamp having a closed envelope the inner diameter of which is less than 16mm and which is filled with an inert gas, a plurality of filaments suspended within the envelope and a getter disposed in the vicinity of each of the filaments.

Abstract: The invention relates to a high-power tunable infrared source employing a four-photon mixing process, with three input lasers, in which process the output power is resonantly enhanced by exciton states in the conversion medium.

Abstract: A method and apparatus for evaluating the corrosion protection that will be provided to a metallic surface by a surface layer. The layer is formed by use of corrosion inhibitors in a corrosive fluid.

Abstract: Variations in the conventional filament and collector electrodes of an alkali metal ionization detector, including the substitution of helical electrode configurations for either the conventional wire filament or flat plate collector; or, the substitution of a plurality of discrete filament electrodes providing an in situ capability for transferring from an operationally defective filament electrode to a previously unused filament electrode without removing the alkali metal ionization detector from the monitored environment.In particular, the helical collector arrangement which is coaxially disposed about the filament electrode, i.e. the thermal ionizer, provides an improved collection of positive ions developed by the filament electrode.

Abstract: A method and apparatus for achieving large susceptibilities and long interaction lengths in the generation of new wavelengths in the infrared spectral region. A process of resonantly enhanced four-wave mixing is employed, utilizing existing laser sources, such as the CO.sub.2 laser, to irradiate a gaseous media. The gaseous media, comprising NH.sub.3, CH.sub.3 F, D.sub.2, HCl, HF, CO, and H.sub.2 or some combination thereof, are of particular interest since they are capable of providing high repetition rate operation at high flux densities where crystal damage problems become a limitation.

Abstract: A triode ionization gauge controller employing logarithmic amplifiers develops a signal proportional to the logarithm of the ratio of an ion current to the ionizing current. Gaseous thermal conductivity is employed to reduce emission current at high pressure, thereby prolonging the life of the cathode. Complete over-pressure protection is accomplished by comparing emission current with respect to a predetermined limiting current.

Abstract: A digital tachometer arrangement in which pulses resulting from rotation of a shaft, are counted over a predetermined time interval. The time interval is established by counting pulses from a high frequency oscillator. The counting of pulses from the high frequency oscillator is begun only at a predetermined instant when the pulses from the rotating shaft attain a positive edge. Relating the beginning of the time interval precisely to a predetermine edge of the pulses from the rotating shaft, provides for a stabilized display which counts the pulses from the shaft during the preset time interval. The count of the pulses from the rotating shaft over the preset time interval, is proportional to the rotational speed of the shaft, and is displayed on a digital readout connected to a binary-coded decimal counter receiving pulses from the rotating shaft.

Abstract: A velocity sensor for sensing the speed of a moving conductive body employing an E-shaped magnetic core having a pair of spaced Hall effect devices positioned on the end of the central core, the ends of all cores being arranged adjacent to the path of the moving conductive body. The difference in output voltage registered by the two Hall effect devices is indicative of the speed of the conductive body.

Abstract: Liquid-metal plasma valve has an anode, a condenser and a force-fed liquid-metal cathode. These bound the interelectrode space through which the plasma jet acts during conduction. The cathode directs the plasma jet to impinge on an inclined surface which acts as the anode. The inclined surface reflects the particles to the condenser when the anode is noncondensing, but when the functions of anode and condenser are combined, the inclined surface of the condensing anode traps the jet particles. When the anode is noncondensing, in some cases the condenser and anode are at the same potential and in other cases the condenser and cathode are at the same potential. Cathode, anode and condenser are shaped to minimize the transit time of jet particles from emission to condensation.

Abstract: A low-pressure mercury vapor discharge lamp, having a discharge space containing thermally emitting electrodes and a mercury amalgam which is composed of mercury, bismuth, tin and lead.This amalgam causes the mercury vapor pressure to remain stable at the value of 6 .times. 10.sup.-3 torr which is the optimum value for the conversion of electric energy into ultraviolet radiation over a wide temperature range. In addition, the mercury vapor pressure at room temperature is still sufficiently high to ensure rapid starting.

Abstract: High-speed testing circuitry which, when coupled to one terminal of a multi-terminal electronic device, such as an integrated circuit, can either supply test stimuli signals up to a frequency of 30 MHz, receive output signals produced by the device under test in response to test stimuli signals applied by associated test circuits and compare these signals against computer predicted signals, or provide for parametric testing of the device.

Abstract: An electronic three-phase four-wire system watt-hour meter equipped with a single operational circuit which multiplies the voltage and the current of each phase of a three-phase alternating current power source of which electric energy is to be measured. Electronic switches are provided which work on voltage and electronic switches are provided which work on current in each phase. Said electronic switches are cyclically opened and closed by three-phase pulse signals provided for control. The operational circuit produces, in the form of a current, an output corresponding to the sum of the electric power of each phase of said three-phase alternating current source.

Abstract: A combined electric meter for measuring AC and DC voltage and ohms is provided with read-outs having indicators progressively actuated for simultaneously indicating AC and DC voltages and for indicating ohms. The read-outs are in the form of light emitting diodes in which the lights are progressively illuminated to indicate a range of voltage or ohms. A pair of probes are manually connected to the circuit to be tested and provide a common connection for the voltage and ohm section of the meter. Should voltage be sensed by the probes, the ohmmeter section is automatically taken out of circuit to protect it from damage. A high speed switch transistor is responsive to an external voltage across the probes for opening the ohmmeter circuit before the external voltage can cause damage to the ohmmeter. The meter has an internal power supply for operating the read-outs and providing a regulated voltage for a resistance to be measured by the ohmmeter section.

Abstract: A circuit board testing machine for positioning one or more test probes relative to a circuit board and wherein the position of the test probes can be automatically positioned and locked in the desired position and in which the circuit board can be replaced in a holder that is automatically moveable against the test probes so as to supply test signals to a measuring device.

Abstract: A semiconductor electroluminescent device includes a body having a pair of spaced end surfaces, at least one of which is capable of emitting light generated in the body and a recombination region in the body extending from one end surface to the other end surface. The body also includes a pair of spaced contacting surfaces which are approximately perpendicular to the end surfaces. On one of the contacting surfaces is a stripe contact which includes a plurality of spaced, parallel electrically conductive sub-stripes extending from one of the end surfaces to the other end surface with insulation between the sub-stripes. The sub-stripes may be conductive films on the surface of the body or conductive regions within the body. The width of the sub-stripes and the spacing therebetween along the end surfaces, are such that the stripe contact provides a substantially uniform current density at the recombination region of the device.

Abstract: A test set for testing relay contact protection networks comprising a signal generator coupled to an analyzing circuit and a test connector arranged for enabling the test set to be used for in-circuit testing of contact protection networks. The test connector is constructed of two elongated insulating members each having a tapered operative arm on which contact elements coupled to the analyzing circuit are mounted. Hinge apparatus supports the two elongated members and enables both angular and parallel lateral relative movement of each of the tapered operative arms to selectively connect the contact elements with ones of the contact protection networks.

Abstract: An automated sample changer, controlled by gas fluidic circuitry, integrated with a Nuclear Magnetic Resonance (NMR) spectrometer provides a means for sequentially transferring samples to and from such spectrometer without an attendant to control such transfer. Such a changer comprises a means for holding a series of samples, a robot arm cooperating with such holding means and disposed in alignment with the sample receiving tube of an NMR spectrometer, a gas fluidic circuit to sense the required action, and a second gas fluidic circuit integrated therewith to provide the energy to make the transfer.