Abstract: An infrared radiation-burglary detector comprising an optical system for focusing the radiation upon a radiation receiver. One or more internally reflecting prism surfaces enclose the axis of the optical system and are arranged substantially parallel to such axis.

Abstract: A collimator for use with a beam of radiation, and in particular, for use in controlling the cross-sectional size and shape of the radiation beam and intercepting undesired off-focus radiation in an x-ray apparatus. The collimator is adapted to be positioned adjacent the source of radiation and embodies a plurality longitudinally extending leaves pivotally mounted on and between two supports, the leaves moveable about their pivots to close overlapping relation to effectively define a hollow cone. The cone defines an aperture at its narrow end which can be adjusted in size and shape by rotation of the two supports which are adaptable to being moved one relative to the other, to thereby cause an expansion or contraction of the hollow cone and correspondingly an increase or decrease of the cross-sectional size and/or shape of the radiation beam passing through the aperture.

Abstract: Methods and apparatus are provided for gauging the thickness or other property of a plastic film such as blown film or other material having a front side, a back side, and characteristics including a substantial transparency to radiation at a reference wavelength and a degree of transparency depending on the value of the property at an absorption wavelength. These methods and apparatus provide a useful measurement of the material property in the presence or absence of detrimental effects such as those caused by a broadband absorbing substance (e.g. carbon black) or scattering substance (e.g. TiO.sub.2) in the material, or variations in the apparent reflectivity of one or both of the surfaces on the front and back sides, as a result, for example, of the minute surface irregularities in high-density polyethylene.

Abstract: A radioactivity logging tool including a gamma ray detector is field calibrated with the help of a sleeve that has a radioactive material distributed therein and is clamped about the tool so as to completely surround the detector. The radioactive material is peferably uranium 238. It can be either distributed uniformly inside the sleeve or take the form of wires which extend along generatrices or circumferences of the sleeve.

Abstract: A uniform source of nuclear radiation is produced by converting a convertible surface portion of a body. The conversion can be by chemical combination or reaction, neutron bombardment, ion exchange of an element present in the convertible material with a solution of radio-active ions of the element or by permitting the radio active particles to be embodied into the surface portion. A preferred embodiment utilises conventional photographic film in which the silver halide grains are treated chemically with a radio-active material.

Abstract: An X-ray examining device comprises an optical aperture including adjustable sector-like laminations. The laminations are rotatable about axes perpendicular to the optical axis. The edges of the laminations are adapted to the optical system so that proper imaging is maintained in the case of a comparatively small opening of the aperture.

Abstract: The approximate concentration of a carburetor additive in a motor fuel is determined by a paper chromatographic method.

Abstract: A variable intensity fluorescent display, utilizing fluorescent segments for forming indicia when irradiated by an ultraviolet lamp, utilizes a separate source of infrared light, such as a variable intensity incandescent lamp and deep red, or infrared, filter and the like to provide quenching action in the fluorescent material in a controlled manner.

Abstract: A calibration assembly for an infrared moisture analyzer used for measuring the moisture content of tobacco leaf is described. The assembly comprises a housing for a glass window etched on at least one face and a layer of a particulate material having average particle sizes of about 50-100 microns. The assembly is characterized as having a reflectance similar to that of tobacco.

Abstract: Certain internal parts of a gas cooled dynamoelectric machine may be coated with selected materials which will decompose at elevated temperatures to give off sub-micron particles into the machine gas coolant called pyrolysates. The presence of such pyrolysates in the machine gas coolant is indicative of localized overheating within the dynamoelectric machine. A detector is known for sensing the occurrence of these pyrolysates and hence a monitoring system has been devised for giving an early warning of machine overheating. Occasionally, oil mist particles from the machine may become entrained in the machine gas coolant and cause a false overheating signal from the detector. A second detector has been devised which may be used in combination with the first detector to provide a redundant monitoring system which will provide immediate validation of the presence of pyrolysate particles and which monitoring system is testable on line.

Abstract: The analysis of formation samples from drill cuttings for Po-210 allows the tracing and detection of possible uranium deposits from a larger distance. Furthermore, in connection with chemical uranium analysis and equivalent uranium analysis from gamma-ray countings, anomalies such as multiple bodies and the existence of bodies in disequilibrium can be detected.

Abstract: An X-ray film cassette is formed of a pair of hinged plates, both arched inwardly about axes parallel to the hinge axis. One of the plates is formed from an inwardy curved piece of sheet metal prestressed by clamping it into an edge frame. The inside surfaces of each plate may carry X-ray intensifying screens. A method of prestressing the one plate is also disclosed.

Abstract: An infrared radiation-burglary detector comprising a number of reflector surfaces which focus the radiation incident from different separate receiving regions upon a common radiation receiver. The reflector surfaces are arranged and aligned such that the intersection locations of the receiving regions, viewed in the radiation direction, are located behind the front of the detector.

Abstract: A combustion product detector contains a single ionization chamber having a radioactive source therein. It is provided with means to test the function of the device. The means includes an electrically non-conductive member which may be introduced in the ionization chamber to simulate (in effect) the presence of smoke in the chamber. Housing for the chamber is constructed and mounted to shield the components contained therein. An FET and resistors are closely coupled to a radioactive source holder and to a printed circuit board on which the housing is mounted. A metal coil spring electrically connects the non-conductive test member and the housing to discharge static. The test member may be removed readily to permit inspection and cleaning of the radioactive source surface.

Abstract: A ferroelectric imaging system is taught. The system comprises a lens system, detector matrix, drive and readout electronics, controller, video processor and display. The lens system is a lens system for focusing electromagnetic energy from a scene onto a detector matrix. The drive and readout electronics selectively bias the elements of the detector matrix, and readout voltage signals indicative of the infrared energy impinging on each element of the detector matrix. The controller section includes clocks and shift registers, respectively, for timing the electronic drive and readout electronics, and for selecting in a desired order the matrix elements for readout. The controller also controls the readout signal input to the video processor which processes the voltage signal output of the detector matrix into video signals. The video signals are applied to a display means such as, for example, a cathode ray tube for display.

Abstract: In a hydrogen cooled dynamoelectric machine, an ion chamber detector monitors thermally produced particulates. Specificity and sensitivity of the ion chamber detector are improved by applying an electrical potential of a limited predetermined range to the electrodes of the detector and operation of the detector occurs within a well defined subsaturation range.

Abstract: A luminescent screen which is applicable to X-ray diagnosis, and also with particular advantage to the soft-radiation technology. For the producing of this fluorescent material, a corresponding quantity of rubidium bromide and thallium halogenide may be mixed under the addition of water, and thereafter dried through the introduction of heat.

Abstract: An electronradiography imaging chamber providing a real time visual image. An electronradiography imaging chamber with a solid X-ray absorber at one electrode and with electrophoretic particles in the gap between the electrodes, with the particles being selectively moved to a transparent electrode as a result of the electrostatic charge image formed by absorption of incoming X-ray radiation in the solid absorber. An imaging chamber which can be cyclically operated at a relatively high repetition rate, typically 10 to 20 images per second, thereby providing real time viewing of the objects. SUBACKGROUND OF THE INVENTIONThis invention relates to electronradiography and in particular, to X-ray systems providing for real time imaging. The present invention is an improvement on that disclosed in copending application entitled X-RAY SYSTEM WITH ELECTROPHORETIC IMAGING, Ser. No. 571,220, filed Apr. 24, 1975, now U.S. Pat. No. 3,965,352.

Abstract: The following specification describes a connector assembly employing a capacitor assembly having axially spaced radially extending capacitor plates carried by a ceramic or dielectric member. One plurality of plates are connected in common to the connector shell and other radially extending axially spaced plates are connected to respective contacts of the connector to form a filter capacitor for each contact. A conductive elastomer or metal spring engaging one of the common plates under axial pressure ensures a secure electrical ground connection between the plates common to the connector contacts and the shell while a metal spring preassembled to each contact at an axial position coincident with the capacitor assembly exerts a radial outward pressure to ensure an electrical connection to the capacitor plates associated with the respective contact.

Abstract: A movable instrument intended for utilization in detecting a difference which is capable of being optically detected between adjacent locations can be constructed so as to include an optical sensor for producing an output which is proportional to the difference between various locations and an illumination source operatively connected to the optical sensor for providing a level of brightness which is proportional to the output of the optical sensor. Such an instrument is preferably a device which is used in determining the temperature of a surface. When the invention is utilized in conjunction with such an instrument the apparent intensity of the light emitted from the illumination source provides a convenient analog indicator facilitating the instrument being pointed at either the hottest or coldest portion of the surface.