Abstract: A system for testing a group of hydrophones includes (a) a tank having a nozzle adapted for attachment of a streamer jacket; (b) a harness reel inside the tank for reversibly retaining a group of hydrophones; (c) fluid passage means into the tank for introducing and withdrawing fluid into and out of the tank; (d) an oscillating pump in fluid communication with the tank to introduce a time varying pressure pulse in the tank; (e) a reference hydrophone inside the tank; (f) electrical coupling means to couple a hydrophone signal from the group of hydrophones and the reference hydrophone to a central processing unit; and (g) means for comparing the hydrophone signal of the reference hydrophone to the hydrophone signal of the group of hydrophones.

Abstract: A holder for a self defense spray comprises primarily a canister to hold a quantity of a self defense spray with an attached ring extending from the canister which fits a human finger. On top of and extending from the canister is an actuating plunger for ready access by a human thumb. The canister also has an orifice to discharge self defense spray upon actuation of the actuating plunger. Alternatively, the canister may form a hollow, open-topped cylinder to receive a pressurized can, such as an aerosol can of the self-defense spray, with the same or similar ring for use by the person carrying the spray. The actuator may be oriented to extend beyond the perimeter of the cylindrical canister to make the actuator more readily accessible by the user.

Abstract: An implantable cardioverter/defibrillator with adaptive coupling interval modifies known cardioverter devices that have a set, though adjustable shock coupling interval. The cardioverter/defibrillator determines the time interval between events in the cardiac cycle, and calculates a coupling interval based upon the duration between these timed events. The adaptive coupling interval may be set at a desired percentage of the interval between events.

Abstract: A game board is shown having a playing surface with a map and a game playing path thereon. The players move their markers or talismen along the path. The path can be optionally a slot or groove, a series of peg holes, or a marked mileage strip. By a chance mechanism, player movement is determined. The preferred talisman carries a torch with simulated light from a bulb provided with battery power.

Abstract: A pumping apparatus is set forth for use in a flowing well which flows into the well from formations on the exterior thereby producing a mix of oil and water. A column is accumulated where oil stratifies on the top. An oil producing pump is positioned to draw from the top portions of the column and produce oil to the surface through a production tubing string in response to operation of a sucker rod actuated pump. The sucker rod string in addition operates a water expelling pump on the opposite stroke, thereby forcing water out of the accumulated column of liquid. The water is returned from the cased well into a water receiving formation on the exterior.

Abstract: The present invention is directed to a pointer-based query formulation methodology for use with a computer having a pointer-based device associated therewith. The method of the present invention provides the user with a displayed n-grid of n-tuples of keys in a display window of a display device where the n-tuples of keys are attributes associated with the data set to be searched. Once the data set to be search has been selected and the n-grid generated and displayed, the user can use the pointer-based device to select one or more grid elements or n-tuples. The method then converts the selected grid elements into a search query that is then applied to the data set and the data entries containing or matching the search query are accumulated and displayed in a second display window for user review.

Abstract: An active element in a hydrophone includes a piezoelectric hydrophone crystal mounted to a backing plate. The piezoelectric crystal may divided into separate segments. If so segmented, the polarities of the segments are oriented in the same direction. Whether or not segmented, the center portion or segment of the crystal is supported in part by a center pin at its center. Thus, in the presence of a downward pressure, the end portions or segments develop a concave flexure and the center segment, due to the center pin support, develops a convex flexure. With this reverse flexing phenomenon, the center portion segment develops an electrical signal of opposite polarity from those of the end segments. By carefully selecting the areas of the end segments, and electrically coupling the segments so that the harmonics of the various segments are added out of phase, the distortion introduced the harmonics of the various phases subtract.

Abstract: The present disclosure is directed to an extension device to be affixed to table in a radiology laboratory to hold a patient thereon. It is formed of sheet material and is transparent to x-rays. At the upper end, there is a head portion having a width and length to support a cushion to thereby enable a patient to rest on the cushion. The cushion is preferably circular with a central opening so that the patient can rest face down as required and the sheet member includes an opening therebelow. The trunk of the patient is support on the main portion which has a width sufficient to hold the patient thereon. Left and right clamps releasably secure the device on a table. Cushions are attached with strips of Velcro. Lengthwise runners on the lower side attach the device in a locked position on an x-ray table.

Abstract: This invention is directed toward a fiber optic modulation and demodulation system, and more particularly directed toward a telemetry system for relaying signals from sensors in remote, harsh environments. Light is modulated using one or more optical reflective grating and piezoelectric crystal combinations, and demodulated using an interferometer system. The one or more modulators are driven by the responses of one or more sensors thereby modulating one or more carrier wavelengths of a carrier light source. The modulated light signal is transmitted from the sensor or sensors, over an optical fiber, to an interferometer which is used to demodulate the reflected signals and thereby determine the responses of one or more sensors. One embodiment of the invention set forth is that of a telemetry system linking sensors within a borehole to detection and processing equipment at the surface of the earth.

Abstract: A hydrophone structure comprises a hydrophone casing within which is mounted a conductive substrate. Sound pressure signals are conducted into the interior of the substrate, on which are mounted piezoelectric crystals on the exterior of the substrate. The volume between the casing and the substrate is nearly filled with a fluid, preferably oil. One or more bubbles of air remain in the volume between the casing and the substrate to permit vibration of the substrate and consequently the piezoelectric hydrophone element.

Abstract: A hydrophone transducer is prepared by depositing a piezoelectric material upon a conductive substrate or support structure, and then etching the material into selected regions or segments. The center segment, which provides most of the fundamental signal, is polarized in a first direction by the introduction of a polarizing voltage. The end segments are polarized in the opposite direction by the imposition of a polarizing voltage in the opposite direction. The conductive substrate then serves as one terminal of the output of the hydrophone while the upper surfaces of the segments together serve as the other terminal. The relative strengths of the signals from the segments may tailored by adjusting the areas of the segments.

Abstract: A method for well borehole survey is set out. A sonde supports X and Y accelerometers and X and & sensors on a rate gyro having a Z axis aligned with the sonde. On a slickline, or within a drill string, the sonde is used to measure four variables, these being G.sub.x and G.sub.y, A.sub.x and A.sub.z. This enables well azimuth and inclination to determined. Measuring depth enables a survey to be made.

Abstract: This disclosure is directed toward field emission surfaces, and is more particularly directed toward improvements in cold, low field, high current, low noise field emission devices and surfaces. Such devices are used in field emission display devices such as video displays and information displays. The device utilizes a cermet with graded concentration of insulative and conductive particles deposited on the truncated point of a conical emitter. The emission surface of the cermet is insensitive to gases that oxidize or poison the emission surface. Such gases and other contaminants emanate from a phosphor when the emission device is used in phosphor display devices. The field emission device is operated at lower potentials thereby reducing power requirements and minimizing heat dissipation requirements. Further, the field emission device which operates at lower field in order to reduce mechanically and temporally unstable emission sites which result in current bursts and current deficits at these sites.

Abstract: A cutting element which has a metal carbide stud having a conic tip formed with a reduced diameter hemispherical outer tip end portion of said metal carbide stud. A layer of polycrystalline material, resistant to corrosive and abrasive materials, is disposed over the outer end portion of the metal carbide stud to form a cap. An alternate conic form has a flat tip face. A chisel insert has a transecting edge and opposing flat faces. It is also covered with a PDC layer.

Abstract: The present disclosure is directed to a power plant, and especially two or more such power plants connected together. The power plant especially features a piston connected with a reciprocated but non-rotating piston rod which connects with a pump piston at the opposite end. Power is generated by the power piston and imparted through straight reciprocating motion to the pumped piston. Two or more of these power plants are operated together by connecting them together through a connective mechanical link so that operation of one times the operation of two or more units slaved to the first. Synchronized operation is obtained.

Abstract: The disclosed apparatus and method relate to a cleaning nozzle which, in multiple embodiments, is rotated in a circle or in an ellipse, being one nozzle in one embodiment and multiple nozzles in alternate embodiments so that the surface of a pipeline can be clean with high pressure water or other fluids. Furthermore, the rotating nozzle is supported in a carriage in one embodiment which encircles and travels along a pipeline. The carriage is supported by drive wheels which cooperate with separate drive motors and a control circuit to assure that the carriage remains upright. Multiple rotating nozzles are supported in the carriage to clean adjacent portions of the pipeline. Alternate embodiments are shown for cleaning a horizontal surface with a hand pushed or motorized version, and another version is disclosed supported on a moveable boom, thereby enabling cleaning of an upstanding vertical surface such as the hull of a ship.

Abstract: The present invention provides temporary protection of outside objects from wind, rain, snow, or other elements. In particular, the present invention is a system of supports and fabric or plastic panels that are erected to provide a continuous protective covering over an area, structure, or object. The components of the system may be assembled in various configurations as the situation demands. The system requires minimal labor to install and the covering can be readily raised and lowered as desired.

Abstract: The present invention relates to blends of individual corrosion inhibitors with phosphate esters for protection of ferrous metals against attack by a corrosive environment. These blends are synergistically more effective than each of the individual corrosion inhibitors. The phosphate esters of the present invention are the reaction products of ethoxylated, propoxylated, or butoxylated alcohols or phenols with phosphating agents. Other corrosion inhibitors suitable for blending with the phosphate esters include fatty amines, poly amides, imidazolines, poly imidazolines, quaternary amines, poly quats and dimer, trimer, and polymeric acids. Phosphate esters may comprise any portion of the total amount of corrosion inhibitors in the blend, but the preferred concentration is from about 5 to about 50 weight percent phosphate ester. The corrosion inhibitor blends may be diluted to any concentration with solvents or other fluids as necessary for particular applications.

Abstract: The present invention relates to a specific type of phosphate ester that is as effective or more effective than corrosion inhibitors available in the past. In accordance with the invention, these corrosion inhibitors are highly effective alone or when blended with other specific compounds for protection of ferrous metals against attack by a corrosive environment. More particularly, the inhibitors of the present invention are the reaction products of ethoxylated, propoxylated, or butoxylated alcohols or phenols with phosphating agents.

Abstract: A method and apparatus for sampling an analog signal permits the identification of those samples in which data was lost in the sampling process. A data reference element is generated for each sample element, the data reference element having a corresponding sample element. A user friendly display technique is provided to permit the user to controllably display the sampled signal, clearly showing those portions of the signal in which information was lost contrasted with those portions of the signal that were sampled intact.