Abstract: The present invention relates to an apparatus for continuously measuring the concentration of oil in a water sample by the infra-red absorption method. The apparatus comprises a supplying device which supplies an oil-containing water sample and a supplying device which supplies a solvent for extracting the oil in the sample, each of said water sample and solvent being supplied in a controlled and continuous amount, an extractor connected to said supplying device having an agitator therein, which extractor receives said oil-containing water sample and solvent and serves to extract the oil component in the water sample with the solvent.

Abstract: An analytical apparatus is described having a non-dispersive, multiwavelength photometric analyzer which is adapted to provide simultaneous display of chromatography peaks at a plurality of different analytical wavelengths. In a particular arrangement, the apparatus includes a chromatograph for separating a sample to be examined into components.

Abstract: A driving and positioning arrangement for radiography includes a patient support which can be driven, in a direction longitudinally of the patient, through an aperture in a housing which contains the active elements of a computerised tomographic apparatus. A scale member comprises a part which is supported by the housing and a part which is supported by the patient support. Once the patient is correctly positioned for examination, one of the parts of the scale member is moved relative to its respective support so that the two parts can be caused to assume a selected relative position.

Abstract: The organ-related keys for selecting radiographic exposure parameters according to a predetermined programming may include special correction keys to be actuated according to an estimate of patient transparency, or in any event the keys representing respective organs imply a range of expected attenuations of the incident radiation due to the presence of the patient. The disclosed system senses the implied patient transparency range from the setting of the control keys, and compares the same with an actual value signal due to the specific patient and takes suitable control action in the event that patient bulk does not fall within the predetermined range. For example, the control action may comprise a shut off of the radiation source, or a change of X-ray tube high voltage setting or of anode current.

Abstract: Apparatus for examining a human patient by means of penetrating radiation has a source of radiation for producing a sectoral swath of radiation which traverses a planar slice of the patient and is then measured by a bank of detectors each of which is sensitive to a narrow beam of the radiation in said swath. The swath of radiation is produced by a rotating anode Collidge tube and means are provided for monitoring the radiation intensity at spaced positions across the width of the swath and for taking account of variations of the intensity in the output signals derived from the detectors. Preferably radiation emitted from the anode at near tangential directions is selected to form the swath.

Abstract: A semiconductor body is used by the present invention in the detection of ultraviolet radiation. An antireflection layer is on a portion of a surface of said body with electrical contacting means on the remaining portion of the body. A phosphor layer is on the antireflection layer. The phosphor layer is capable of converting the ultraviolet radiation into visible or near infrared radiation which can be detected by the semiconductor body. On the phosphor layer is a metallic film which is substantially transmissive to ultraviolet radiation and substantially reflective to visible or near infrared radiation. The converted radiation in the phosphor layer which strikes the metallic flow may therefore be directed toward the semiconductor body for detection.

Abstract: Coordinates of a light event, computed by signal processing equipment from output signals developed by an array of photodetectors of radiation imaging apparatus in response to the interaction of a radiation stimulus with a scintillation crystal, are validated only if a representation of the total energy of the light event lies within an energy window functionally related to the coordinates of the light event. In this manner, only desirable radiation stimuli interacting with the crystal are detected, and undesirable, indirect or scattered radiation stimuli interacting with the crystal are discriminated against.

Abstract: A system for portraying data obtained by a radiographic camera, such as an Anger camera, which signals the occurrences of radioactive events and the addresses of locations of the events. Data is obtained from a reference subject and a living subject. The activity of events of the reference subject is stored as a function of event location and is utilized as scale factors for scaling the relative energies of event signals obtained from the living subject, whereby data of the living subject is normalized relative to the reference subject.

Abstract: A fast neutron source is used to irradiate earth formations in the vicinity of a well borehole. Dual spaced epithermal neutron detectors are used to sample the epithermal neutron population at two different spaced distances from the source. A compensated formation porosity is obtained from the ratio of counting rates at the dual spaced detectors. An uncompensated porosity value is obtained from the count rate at the short spaced detector. Borehole washout or cement void regions are located by comparing the compensated and uncompensated values of formation porosity obtained in this manner.

Abstract: Device making it possible to check, prior to or after each irradiation treatment session, the proper operation of the dose-measuring systems associated with a radiotherapy apparatus and comprising at least one dose-measuring circuit equipped with a counter system of preselect design. This device comprises a pulse generator G, means for applying said pulses to the counter system of at least one of the measuring circuits and means making it possible to halt the generator G and reset the counter system to zero when coincidence occurs between the preselected number of pulses corresponding to a preselected dose level D and the displayed number of pulses corresponding to the dose level effectively delivered by an irradiation source S.

Abstract: Disclosure is made of an X-ray fluorescence spectrometer comprising an X-ray source, a holder of a sample being investigated, an analyzing crystal which focuses the fluorescent radiation of the sample installed in the holder, and a detector which records the radiation reflected from the analyzing crystal. The distance between the X-ray source and the sample holder is such as to ensure an illumination of the central portion of the sample's surface not less than 15Z erg/s.multidot.cm.sup.2 .multidot.W, wherein Z defines the atomic weight of the X-ray anode, at a voltge of 50 kV across the X-ray source. The sample holder is so arranged with respect to the focal circle that the distance between the latter and the sample's surface exposed to radiation is not in excess of the product of the distance between the source's focus and the sample's surface exposed to radiation by the ratio between the diameter of the focal circle and the length of the analyzing crystal.

Abstract: A radar antenna includes a plurality of radiators disposed near the focal point of a parabolic reflecting surface. The radiators are coupled to a sector horn waveguide via a plurality of phase shifters and a Butler matrix. The sector horn is concurrently excited in H.sub.10 and H.sub.12 modes of propagation to provide excitation to the radiators. Radiated energy from a radiator propagates to the reflecting surface and is reflected therefrom.

Abstract: A scintillation type neutron detector is provided herein for the measurement of neutrons with optimum neutron sensitivity and minimum gamma sensitivity. A large diameter nuclear radiation insensitive photomultiplier tube is optically connected to a scintillating medium which is responsive to thermalized neutrons. The neutrons available for detection are thermalized by a neutron moderating material adjacent to the scintillator medium. Enclosing and shielding the photomultiplier, the scintillator medium, and the moderator is a combined lead and borated silicone resin housing.

Abstract: A scintillator for a gamma ray camera includes a pair of crystals mechanically pressed together. The surfaces of the crystals are roughened so as to form a photo-diffuser for the light generated as a result of scintillation.

Abstract: Presence of metals such as copper and nickel being economically interesting etals are determined as to existence thereof in the content of manganese nodules according to a method by means of analysis of the activation gamma spectrum of manganese nodule samples after a neutron irradiation thereon. The sample is irradiated with fast neutrons and from the resulting gamma spectrum the ratio of radiation intensities of two main component parts preferably manganese and iron is taken in order to determine the percentage metal content by way of empirically obtained geochemical correlation-data which reproduce the percentage parts of further elements dependent upon proportional ratio of two main elements of the manganese lumps.

Abstract: In an intensifying screen composed of a support layer, a phosphor layer and a protective layer or of a support layer, a reflective layer, a phosphor layer and a protective layer, a carbon black layer is interposed between the support layer and the phosphor layer or the reflective layer. Further, antistatic agents are mingled in the protective layer.

Abstract: An actinic radiation emissive mask for a high resolution lithography emits actinic radiation which originates within the mask. The mask patterns the actinic radiation to expose resist in accordance with a desired pattern. The actinic radiation originating in the mask may be produced by radioactivity, stimulated emission or combinations thereof.

Abstract: A wire device is pivotally attached to one ear post of a head positioning mechanism of the type used in cephalometric radiography. The wire may be pivoted to an indicating position wherein one of its ends indicates the proper location of the orbital area for correct head orientation. The wire provides a straight line on the X-ray film which represents an indication of the Frankfort plane. The wire may also be pivoted to an out of the way retracted position.

Abstract: In the illustrated embodiments a logical switching member is energized from a common power supply at the time that a manual switch is actuated for initiating an x-ray exposure. If the logical switching member does not receive an inhibiting signal within a definite inhibition interval less than a minimum exposure time, the switching member reaches a normal operating state and supplies its logical output signal to turn off the x-ray source. The inhibiting signal is not generated if the radiation detector fails to receive radiation from the x-ray source, or if there is a circuit failure in the inhibiting signal generating circuitry connected to the input of the switching member, or if the dosage fails to increase at least at a selected minimum rate during the inhibition time interval.

Abstract: The invention is a temperature stabilizing device employing a liquid crys wherein the crystal is itself stabilized to provide a thermal viewing element.