Abstract: A circuit means in combination with a conventional oxygen ion conductive solid electrolyte cell establishes the cell in a voltage mode for the purposes of measuring excess oxygen and developing a voltage signal indicative thereof, and switching the cell to a current mode of operation in response to an excess combustible environment wherein current drawn by the cell to pump oxygen for combustible reaction with the excess combustibles environment is measured as an indication of the combustibles content of the gas.

Abstract: In a radiation dosimeter assembly consisting of a wafer-like radiation dosimeter in combination with a mechanical support member the radiation dosimeter is secured within an aperture of the support member by disposing a protective film on either side of the dosimeter and securing the film to the support member via a high temperature adhesive or high temperature adhesive film. This assembly technique permits the annealing of the combination of the dosimeter and the support member to a temperature of about 300.degree. C. which is the typical process for "erasing" extraneous radiation dosage stored in the dosimeter prior to the use of the radiation dosimeter/support combination for radiation measurements. The capability of annealing the total combination permits stock piling of preassembled radiation dosimeter/support member combinations for extended periods of time.

Abstract: In a gas analyzer employing a disc-shaped oxygen ion conductive solid electrolyte cell, having electrodes disposed on opposite surfaces thereof, and secured at its edge within a tubular member by noble metal braze, a non-conducting ceramic layer is disposed between the solid electrolyte material and the braze to minimize cell drift which could otherwise occur if the braze interacted as a cell "electrode".

Abstract: An atomic iodine laser based on the electrical dissociation of CF.sub.3 I in a gas mixture produces excited atomic iodine in the upper level of its split ground state which subsequently lases at 1.315 micrometers to the lowerlevel of its split ground state. The two level atomic iodine laser process excited by the electrical dissociation of CF.sub.3 I or other alkyl-mono-iodides or perfluro-alkyl-monoiodides is efficient and suitable for high average power levels for application in isotope separation, fusion and weapons systems. Bromides may be substituted for the iodines to provide a two level atomic bromine laser which lases at 2.714 micrometers.

Abstract: In a system wherein a single input signal is transmitted via a plurality of output signal channels for various signal processing and control functions, optical isolating circuits in combination with current limiting resistors provide operational isolation among the respective output signal transmitting channels such that a component failure in one channel will not adversely affect the operation of the remaining channels.

Abstract: The heating element in a conventional radiation dosimeter reading apparatus which functions to both physically support a dosimeter as well as heat the dosimeter to a temperature of luminescence, is modified to include a dished portion, or recessed portion, having a flat bottom and sufficient dimensions to receive the radiation dosimeter and allow for the positioning of a transparent retainer, i.e., a glass plate, in contact with the dosimeter to physically retain the dosimeter in the recess to avoid deformation of the dosimeter when heated, and transmit light emanating from the dosimeter when heated.

Abstract: A gaseous mixture of oxygen and fuel (combustibles) is supplied to first and second electrodes disposed on opposite surfaces of an oxygen ion conductive solid electrolyte member wherein the electrodes are composed of different materials each exhibiting a different catalytic action on the gaseous mixture at a given temperature. The difference in oxygen potentials established at the respective electrodes as a result of the dissimilar catalytic action produces oxygen ion conductivity in the solid electrolyte cell which produces an electrical signal the magnitude of which is indicative of the combustible present in the mixture, i.e., methane, hydrogen, carbon monoxide, etc.

Abstract: A cylindrical, elongated incandescent lamp is positioned within a tubular light reflecting member including a line light diffuser strip window. The light reflecting member responds to the electrical excitation of the incandescent lamp by emitting a light pattern through the line light diffuser strip window.

Abstract: Stimulated emission from a molecular laser gas medium at a pressure in the order of atmospheric pressure is achieved by generating electrons having an average kinetic energy approximately equal to an upper molecular vibrational-rotational energy state within the electronic ground level of the laser gas medium for creating a population inversion between said upper molecular vibrational-rotational state and a lower molecular vibrational-rotational state within the electronic ground level of the molecule laser gas medium.

Abstract: An improved thermoluminescent dosimeter system and apparatus for sensing alpha particle emission. A thermoluminescent body is sealed between a pair of metallized plastic films. The dosimeter is mounted within a protective inverted cup or a tube closed at one end, which is disposed in a test hole for exposure to radioactive radon gas which is indicative of uranium deposits.

Abstract: In an electrical or electronic system employing numerous remote devices such as relays, lamps, motors, etc., requiring periodic testing to determine their operability, a monitoring circuit is connected to the output of a test signal generator to provide an indication of the operational integrity of the remote device without requiring a separate dedicated electrical lead for monitoring the operational integrity of the remote device.

Abstract: The coupling and decoupling of one or more of a plurality of differential transformers comprising a digital position probe assembly develops a phase encoded signal indicative of the position or level of a magnetically permeable element such as liquid metal or a lead screw in a nuclear reactor assembly. The phase encoded signal, which is developed as a Gray code, is processed in a phase decoder and digitally converted into a binary coded decimal to provide a digital representation of the level or position of the magnetically permeable material.

Abstract: Described herein is a technique for generating 16 .mu.m laser radiation from a CO.sub.2 molecular gas laser system by use of the 02.sup.0 0-01.sup.1 0 vibrational transition of CO.sub.2. The technique employs a system for pumping the CO.sub.2 molecules from the ground state to the 00.sup.0 1 vibrational energy level such that a population inversion is created between the 00.sup.0 1 and 02.sup.0 0 energy levels, and transferring the population of CO.sub.2 molecules from the 00.sup.0 1 level to the 02.sup.0 0 vibrational energy levels by stimulated emission in a time less than the collisional deactivation time of the CO.sub.2 molecule in the 02.sup.0 0 level. This transfer creates a population inversion between the 02.sup.0 0 and the 01.sup.1 0 vibrational energy levels of the CO.sub.2 molecule which results in 16 .mu.m laser radiation. A similar technique for generating 14 .mu.m laser radiation from a CO.sub.2 molecular gas system is achieved by use of the 10.sup.0 0-01.sup.1 0 vibrational transition.

Abstract: The discrete ballast resistors associated with the multiple pin array of laser cathode structures are replaced by a bulk resistive material in the form of an integral bar or slab which is maintained in contact with the plurality of pin electrodes comprising the laser cathode assembly to provide a stable ballast means. The bulk resistive member employed to provide the ballast for the pin electrodes can exhibit non-linear resistive characteristics to provide greater laser discharge stability with less power dissipation.

Abstract: An oxygen ion conductive solid electrolyte electrochemical cell is employed to pump oxygen for combustible reaction with fuel constituents of a combustibles gas environment which diffuse through an aperture of a housing. The housing in combination with the solid electrolyte electrochemical cell forms an internal chamber. The EMF established across the electrodes of the solid electrolyte electrochemical cell pumps sufficient oxygen for complete combustion with the fuel diffusing through the aperture into the internal chamber. The resulting current of the solid electrolyte electrochemical is indicative of the rate of diffusion of the fuel or combustibles constituent through the aperture. The rate of diffusion is proportional to the fuel or combustibles content of the combustibles gas environment.

Abstract: Each of a plurality of data modules employing commercially available microprocessor circuitry, process pulse rate information from a plurality of remote monitors to develop a digital indication of a desired parameter, i.e., radiation level. A digital check module, incorporating microprocessor electronics comparable to that of the data module, scans the respective data modules to determine the operational integrity of the data modules and automatically assumes the operational responsibility of a data module determined to be operating improperly.While the radiation level is proportional to the rate of the pulses developed by the radiation monitor the instantaneous pulse rate is random. The data modules and check module are digitally designed, incorporating commercially available micro-computers, to determine the true average rate of random pulses or events and to automatically optimize the trade-off between statistical error and system response time.

Abstract: Underground uranium deposits are located by placing wires of dosimeters each about 5 to 18 mg/cm.sup.2 thick underground in a grid pattern. Each dosimeter contains a phosphor which is capable of storing the energy of alpha particles. In each pair one dosimeter is shielded from alpha particles with more than 18 mg/cm.sup.2 thick opaque material but not gamma and beta rays and the other dosimeter is shielded with less than 1 mg/cm.sup.2 thick opaque material to exclude dust. After a period underground the dosimeters are heated which releases the stored energy as light. The amount of light produced from the heavily shielded dosimeter is subtracted from the amount of light produced from the thinly shielded dosimeter to give an indication of the location and quantity of uranium underground.

Abstract: The signal non-linearity which is characteristic of the end portions of an elongated liquid metal level mutual inductance type prove is substantially eliminated by increasing the coil turns per unit length of the probe in the end portions thereby increasing the mutual inductance characteristics of the probe in the end portions.

Abstract: Described herein is a technique for removing gas constituents residing in the aerodynamic boundary-layer developed along the surfaces of electrodes in a flowing gas laser system, which gas constituents contribute to adverse arc conditions.

Abstract: A mixed-conducting (electronic-ionic) membrane exhibiting substantially no mechanical porosity, is employed as a solid state filter in combination with a gas sensor to protect the gas sensor from deterioration and contamination by particulate and certain gaseous matter present in the gas environment being monitored.