Abstract: An infrared source that operates at about 1150.degree. C. without the need for water cooling. The source is configured with a small surface area radiating element, energized by a high frequency AC square wave. The frequency of the AC square wave is much greater than the inverse of the filament's thermal time constant so that the temperature is very stable. The radiating element is mounted relative to a concave reflector so that the infrared radiation forms a beam suitable for input to a spectrometer. In a first embodiment, the radiating element is in the form of a wire coil, while in a second embodiment, it is in the form of a cylinder having a central portion of reduced diameter.

Abstract: A method for steering the direction of drilling for oil, gas, or other boreholes drilled in locations such that the level of magnetic interference from nearby magnetic materials or fields is so large that conventional methods using magnetic compass steering tools cannot meet required accuracies. The method is based upon using gyroscope-based survey tools having an inertial angular rate sensor with one or more axes of rate sensitivity and an inertial acceleration or tilt sensor with one or more axes of sensitivity to perform both the normal survey purpose for such tools and the steering function during drilling.The method includes the measurement of initial azimuthal direction, tilt angle, gyro tool face and high side tool face at the beginning of the borehole and the continuous measurement of one or more of these quantities as drilling progresses.

Abstract: A luminescent fiber marker and method comprised of a linear coaxial lens having an elongated thin cylindrical phosphorescent layer and a pair of colinear and coaxial optical waveguides sandwiching the thin cylindrical phosphorescent layer therebetween so that light impinging on said cylindrical phosphorescent layer along the length thereof is induced to store said radiation energy in said light and emit radiation of a different wave length from the light impinging on said cylindrical phosphorescent layer into both of said optical waveguides. Each of said optical waveguides has a fluorescent material dispersed therein for absorbing the emitted radiation from said phosphorescent layer reemitting the absorbed radiation to effect an internal scatter of radiation in each of said waveguides to permit trapping within the waveguide cores.

Abstract: An alphanumeric identification device for land and construction survey traverse control points comprised of a fluorescent plastic tag with metal detector electronic signal return to enhance location of said point. Each tag has a unique, highly visible alphanumeric indicia thereon which are in a sequential order and in sets to provide an accurate record of the number assigned to each central point.

Abstract: An interferometer bearing assembly including a fixed glass rail, a movable carriage that carries both the movable interferometer mirror and the drive coil for the linear motor, and a mechanism for biasing the carriage onto the rail. The glass rail has two optically flat faces defining a normally horizontal line of intersection. The carriage is a rigid structure with plastic surface portions that provide a bearing interface for contacting the flat faces of the glass rail. To improve stability and reduce the possibility of any transverse movement, the carriage is downward biased, preferably by providing an overlying glass plate with a downwardly-facing flat surface, and mounting a spring-loaded plastic element to the top of the carriage. The plastic element contacts (and slides along) the flat glass surface and transmits a downward force to the carriage.

Abstract: A light piping device to concentrate solar energy and luminescence from photophosphorescence by using internal scattering within optical fiber wave guides and plate wave guide - reflective surfaces to enhance the fraction of light trapped within the optical fiber wave guides for increased light output at the device's edges.

Abstract: This invention relates to a coaxial diffuser optical fiber wave guide incident radiation energy concentrator using internal diffusion to scatter incident radiation energy into guided modes to effect a cumulative propagation of the energy along the wave guide axis which creates a concentration of the incident radiation energy at the collector's edges.

Abstract: The biomedical pump includes a housing with an internal pump chamber defined by a first rigid concave wall formed by the pump body, and an opposed flexible wall defined by a diaphragm incorporating a heat responsive disc for a thermal-responsive pumping movement between a first position overlying and conforming to the body defined first wall and a second position outwardly spaced therefrom. An inlet passageway and an outlet passageway each communicate with the interior of the chamber through the pump body. Each passageway incorporates a one-way check valve for a directional control of the fluid flow in response to the heat induced diaphragm movement.

Abstract: An externally located blood monitoring system has a single access to a patient's blood vessel for monitoring blood associated parameters. A three-position valve permits three modes of operation including flushing, blood pressure monitoring while maintaining patency of the access, and blood sampling while also permitting monitoring of other blood related parameters, such as blood temperature.

Abstract: The invention relates generally to mapping or survey apparatus and methods, and more particularly concerns efficient transmission of survey signals or data from depth level in a borehole or well to the well surface, for analysis, display or recordation; further it concerns efficient transmission of command data from a surface computer unit to the survey tool at depth level in a borehole or well for control of instrumentation operating modes, operating characteristics, or diagnostic purposes; and further it concerns supply of DC power downwardly to the instrumentation via a wireline by which such command signal and survey data or signals may be transmitted upwardly or downwardly respectively.

Abstract: A system for determining range and orientation of distant objects such as a ship. By utilizing split imaging the observed height on a video monitor can be accurately determined despite movements of the image on the monitor. The observed ship can be visually identified and the true height determined from reference sources. A better comparison of data indicating the true height compared to observed height permits calculation of the range to the target ship. Split imaging can also be utilized to determine the observed length of the ship so that observed height and length data can be compared to the true height and length of the target ship to determine orientation of the target ship relative to the observer.

Abstract: A system is provided for transmitting data through an optical fiber. A beam of light is directed into the optical fiber. A plurality of selective wavelength filter-mirrors are interposed adjacent the optical fiber. Each of the filter-mirrors is operable to reflect only a selected color and to transmit other colors. Each of the filter-mirrors moves relative to the optical fiber in response to a variation of a selected parameter, to vary the quantity of light being reflected by the filter-mirror. Variation of different selected parameters causes movement of corresponding selective wavelength filter-mirrors and concomitant reflection of corresponding selected colors. The quantity and color of the light being reflected are detected by a plurality of selective wavelength transmission members. Each of the transmission members is operable to transmit only a selected color. The quantity and color of the light transmitted by each transmission member are sensed.

Abstract: Laser systems in which efficiency and high repetition rate operation are obtained utilize an active laser medium consisting of pentaphosphate with high concentration doping of a rare earth such as neodymium and a pumping means in optical contact with the active medium which produces pump radiation confined to a band which essentially overlaps the absorption band of the laser medium. An active mirror configuration is described with thin layer of pentaphosphate active medium on one side of a substrate which is transmissive to the pump radiation. The pump radiation is provided by an excimer laser or by a semiconductor converter layer which is excited by flash lamps. The laser medium may be segmented with the space between segments occupied by material absorptive of amplified spontaneous emission wavelengths. The laser system is especially useful in laser fusion systems.

Abstract: There is disclosed a helmet useful for crew members of an aircraft from which they may be ejected at high speeds. The helmet comprises a shell which fits over the head in a conventional manner and is provided with a strap which passes beneath the chin to retain the helmet on the head. A visor housing attached to, and spaced from, the shell is positioned to cover the forward crown part of the head and has portions which extend downwardly along the sides of the face of the wearer, which merge into the planes of flat areas at the ears. By this structure the usual bulbous shape at the ears commonly found in helmets is avoided and the side-to-side dimension is reduced.There are formed at the upper part of the visor housing a number of discontinuous louvers forming ridges through forward facing walls of which there are apertures. During an ejection, air scooped into the region between the visor housing and the shell exits through these louver openings.

Abstract: A sluice gate assembly has a resilient seal member mounted on the gate disc for movement therewith relative to a stationary frame. The frame has seat facings against which seat facings on the gate disc are urged when the gate disc is seated in the closed position. The resilient seal member is normally spaced from the frame and its seat facings when the gate disc is in other than the seated closed position. As the gate disc is seated in the closed position, a wedge-actuated seal retainer exerts a force on the resilient seal member to deform it against the frame seat facings.