Abstract: A Faraday rotator optical sensor in combination with optical fiber transmission means is employed to monitor overload current conditions in a high voltage electrical load and transmit this information to a low voltage signal processing circuit while providing desired isolation between the high voltage load and the low voltage signal processing circuit.

Abstract: An array of light sources transmit a series of light beams onto an object and the reflected light beams are focussed on a light responsive transducer. The output signals of the transducer are processed to determine the location and orientation of the object. The location and orientation information in turn is available to control the operation of a tool or manipulator relative to the object.

Abstract: A multilayer high temperature, low inductance capacitor consisting of alternate layers of metal and dielectric insulator materials which are inert with respect to metal halide environments is directly affixed to a planar electrode of a high temperature metal halide laser system to improve laser performance.

Abstract: An improved thick film stannic oxide sensor is disclosed whereby the sensitivity of the sensor to CO is enhanced by the addition of a rare earth oxide to the sensor composition and the catalytic reactivity of the sensor, when contacted by a gas containing a reducing constituent, i.e., H.sub.2 or CO, and oxygen, is enhanced by employing RuCl.sub.3 or PtCl.sub.2 as a catalyst.

Abstract: Multiple input laser pulses, wherein each pulse serves to create the population inversion for the next pulse, are amplified in the laser medium of a single laser amplifier apparatus.

Abstract: Oxygen ion and oxy-anion conductive solid electrolyte, electrochemical cells are combined to form a single gas measuring apparatus having a common internal gas reference and developing electrical signals from which the partial pressure of oxygen and an anhydride of a monitored gas environment can be determined.

Abstract: In a solid electrolyte electrochemical cell device for generating an EMF signal based on the Nernst equation which is indicative of the SO.sub.2 content of a monitored gas environment, the oxygen content of the reference environment of the cell is adjusted to maintain it equal with the oxygen content of the monitored gas environment to eliminate the effect of oxygen on the EMF signal measurement of SO.sub.2.

Abstract: An emitter plate of a high atomic number material is positioned between collector plates of a low atomic number material and the ionization current developed in the gap regions therebetween in response to low radiation fields and the self-powered current developed in response to high radiation fields is measured by a current measuring circuit as an indication of impinging radiation.

Abstract: Stimulated emission resulting from a secondary source of radiation transfers population from a lower laser level of a primary lasing transition to a third energy level which is not involved in the primary lasing of a laser system to reduce lower laser level bottlenecking.

Abstract: An alkali ion conductive solid electrolyte electrochemical concentration cell assembly for measuring gases containing anhydrides or related compounds in air or in oxygen-bearing gases is divided into two identical alkali ion conductive half cycles. Each half cell is secured to opposite surfaces of the closed end of a solid membrane exhibiting alkali ion conductivity corresponding to the alkali ion conductivity of the half cells. The membrane effectively isolates a monitored gas environment contacting one half cell from a reference gas environment contacting the other half cell while supporting the equilibrium mode of operation of the concentration cell assembly to generate an electrical signal indicative of a gas species of interest in the monitored gas environment.

Abstract: The operation of a two-photon, three level laser system at high temperatures or pressures is made possible by reducing the build up time of the flux of the second lasing transition in the laser discharge region.

Abstract: A Faraday rotator optical sensor in combination with optical fiber transmission means is employed to monitor overload current conditions in a high voltage electrical load and transmit this information to a low voltage signal processing circuit while providing desired isolation between the high voltage load and the low voltage signal processing circuit.

Abstract: The self-generating thermal radiation properties of an optical fiber element are employed to determine the temperature, location and length of a hot spot, or region, of an object.

Abstract: The depletion of energy stored in the transfer gas component of a low pressure, short pulse laser system following excitation of the laser gas medium consisting of a lasing gas component and a transfer gas component is achieved by extracting a plurality of output pulses by providing a sufficient delay between output pulses to permit the transfer of energy from the transfer gas component to the lasing gas component.

Abstract: In a document scanning scheme where data is preceded on the document by a preprinted document scan mark, circuitry is employed to utilize multiple line scans of the scan mark by a line scan camera to verify the presence of a scan mark and avoid erroneous response to random marks on the document.

Abstract: The light levels reflected from a predetermined blank portion of an optically scanned document are monitored. The presence of dirt or smudges in the optical path which could adversely affect the validity of the information read from the document.

Abstract: The braking of an a.c. motor is accomplished by sequence controlled outputs of a shift register circuit which sequentially disconnects the main a.c. electrical excitation from the a.c. motor, connects a full wave rectifier circuit to the a.c. motor and then applies the a.c. electrical excitation to the full wave rectifier circuit resulting in a braking current being supplied to the a.c. motor.

Abstract: In a data acquisition and storage system including a plurality of remote data generating units, a data processor/display unit for addressing the respective data generating units, processing the data for storage and providing a visual display of the process data, and a computer having random access to the stored data of the processor/display unit to selectively update stored information, a display exerciser is connected in parallel with the processor/display unit and provides the capability of both recirculating data from storage and the processor/display unit through the display unit as well as introducing operator initiated data.

Abstract: A calibration filament containing a sodium-bearing compound is included in combination with the sensing filament and ion collector plate of a sodium ionization detector to permit periodic generation of sodium atoms for the in-situ calibration of the detector.

Abstract: The SO.sub.3, H.sub.2 SO.sub.4 content of a gas environment containing SO.sub.2 and H.sub.2 O is measured by cooling the gas to a temperature to convert SO.sub.3 in the presence of H.sub.2 O to H.sub.2 SO.sub.4 to effectively separate SO.sub.3, H.sub.2 SO.sub.4 from SO.sub.2 to permit the individual measurements of SO.sub.x (SO.sub.2 +SO.sub.3), SO.sub.2 and SO.sub.3, H.sub.2 SO.sub.4.