Abstract: A spray tanker suitable for balanced operation while traveling on level, uphill or downhill grades having a vehicle body and a tank body supported thereon. The tank body comprises a forwardly and rearwardly positioned tank section for containment of the fluid and conduits connecting each section to fluid spray apparatus for spraying fluid onto the grade traveled by the tanker. Valve structure connected to the fluid conduits connects either one or the other of the tank sections to the spray apparatus and the valve structure is operable for connecting the rearwardly positioned tank section to the spray apparatus when the vehicle is moving on an uphill grade and for connecting the forwardly positioned tank section to the spray apparatus when the vehicle is moving on a downhill grade.

Abstract: According to the present invention the microporous surface of a corrodible metal body is protected against corrosive agents of the atmosphere and even such severely corrosive agents as those found in marine environments, by an impregnation in the pores of an inner protective material, preferably oil, that is substantially impervious to corrosive agents, and a covering of outer protective material, preferably resin, that is intimately bonded to the outer surface of the metal and bridges over the impregnated pores. After the impregnation, any of the inner protective material such as oil that may remain on the outer surface of the metal is selectively removed, while the inner protective material in the pores is selectively retained, whereby a secure, intimate bond of the covering to the metal is assured to protect the metal from corrosion initiating from the outside, while the inner protective material remains operatively disposed in the pores to protect the covering from corrosive undermining.

Abstract: A corrosion protection structure for a metal body having pores which communicate with the outer surface of the body is designed to protect against corrosive agents of the atmosphere and marine environments. The structure comprises an inner protective material substantially impervious to atmospheric corrosive agents disposed within the pores, the outer surface of the body being free of the material, and a solid outer protective material, different from the inner material and substantially impervious to atmospheric corrosive agents and to the inner material, covering the outer surface and the pores and intimately bonded to the outer surface. To form the corrosion protection structure, the pores of the body are impregnated with the inner protective material, preferably oil. After the impregnation, any of the inner protective material such as oil that may remain on the outer surface of the metal is selectively removed while the inner protective material in the pores is selectively retained.

Abstract: A heat exchanger of the shell and tube type having a floating tube sheet to accommodate differential thermal expansion and contraction between the shell and the tubes. The cross-sectional area of sliding joint means between the floating tube sheet and the shell, and the total external and internal cross-sectional areas of the tubes, are selected to minimize axial forces on the tubes. A novel tube support system including hollow support members engaged between the adjacent tubes enables a true counterflow heat exchange relationship to be established between the shell side fluid and the tube side fluid.

Abstract: Method and apparatus for making separations from aqueous solutions, particularly for removing water from aqueous solutions of electrolytes or other substantially non-volatile solutes, such as saline water. According to the invention, a solvent extraction process is employed which produces streams of lower and higher solute concentration in composition from an aqueous solution by contacting the aqueous solution with a solvent to produce an extract stream and a residual raffinate stream, the solvent having the property of dissolving water at a first lower temperature and substantially releasing it at a second higher temperature without substantially extracting the solute from the aqueous solution. The extract stream is contacted with a hotter aqueous reflux and thereby simultaneously heated and caused to have its content of undesired solute diminished.

Abstract: According to the present invention circuit means and method are provided which correct for variations in an amplifier load such as a speaker by sensing the load current, developing a feedback signal related to the load current, comparing this feedback signal with the amplifier program, and instantaneously adjusting the gain of the amplifier to compensate for load current deviations from the program applied to the amplifier. By this means the performance of the speaker or other load that is driven by the amplifier is positively controlled and forced to track accurately with the program applied to the amplifier despite such opposing factors as reactance or inertia of the load, whereby the acoustic or other load response is a substantially accurate reproduction of the program.

Abstract: A fluid proportioning valve adjustable to provide a plurality of specific predetermined fluid proportions. To adjust the valve for one of the predetermined fluid proportions, the extent of displacement of a flow displaced proportioning piston is preselected by engagement of an adjustable stop member in one of a plurality of specific stop positions.

Abstract: A sonic transducer incorporating a rigid plate-like transmitting member coupled to electromechanical compression wave generating means such as a piezoelectric crystal for transmitting sonic energy in a medium. The transmitting means is damped to prevent ringing, and the transducer is particularly responsive to the high frequency audio spectrum. The sheet-like configuration of the transducer enables it to be recessed within a generally flat panel such as a front panel of a speaker cabinet while nevertheless being separated from the inside of the cabinet to avoid interaction with a conventional cone-type speaker that may be mounted in the same cabinet. The sheet-like transducer is resiliently mounted in a direction contrary to the principal direction of sonic energy propagation in the transducer to minimize loss of sonic energy to supporting structure such as a speaker cabinet.

Abstract: An axially extensible telescoping joint is employed in a directional drilling string to reduce the number of times for a given footage of well drilled that the wireline from the downhole survey or steering tool to the surface readout must be tripped through the string for adding more drill pipe. By drilling the first half of a drilling sequence with the telescoping joint collapsed, and then the second half of the sequence with the telescoping joint extended, twice the conventional footage can be drilled between wireline trips, and two stands of drill pipe can be added rather than the conventional single stand each time the wireline is tripped.

Abstract: A vapor generator for generating vapors from a vaporizable liquid concentrate such as a deodorant-fragrance concentrate and employable either with or without a fan dispenser. The vaporizable liquid is sealed within a receptacle having an openable top portion, such as a pull-top can, and a capillary action diaphragm is located under the top so as to be exposed when the top is opened. The vaporizable liquid is transported upwardly from the body of liquid to the diaphragm by capillary action membrane means extending from the top to the bottom of the receptacle, and then distributed by capillary action through the diaphragm and vaporized from the exposed surface thereof. A small pressure equalization port through the diaphragm equalizes the vapor pressure under the diaphragm to substantially atmospheric pressure so that such vapor pressure will not interfere with the capillary actions.

Abstract: The present invention relates to an improved vapor dispenser and method that may be used for vapor-treating the air of a given area; the air-treating vapors containing such diverse elements as medicants, decongestants, inhalants, repellants, insecticides, bactericides, deodorants, and the like. The disclosed vapor dispenser may be described as a "semistatic" type, since it uses a static vapor generator that does not require a propellant, and uses automatic intermittent air movement for dispensing the accumulated vapors into the area to be treated by the vapors. Thus, the disclosed semistatic vapor dispenser continually provides the desired vapor concentration.An improved static vapor generator is also disclosed, the improvement permitting the static vapor generator to produce vapors at a more uniform rate during its entire lifetime.

Abstract: The disclosure includes a surveillance and weapon system comprising a tubular, generally annularly symmetrical multiple fire weapon having optical scope means coaxially arranged in the throat thereof. Also disclosed is a remote control embodiment particularly suitable as an anti-hijacking system for the protection of commercial aircraft, but equally useful in the protection of other vehicles such as ships, trains or the like, and for the protection of various places that are frequently subject to criminal attack such as banks, prisons, courtrooms, stores, offices, and the like.

Abstract: A portable automatic billing and printing device which provides for an automatic calculation and printout of a customer bill for utilities such as water, gas and electricity. A customer utility card is positioned within the apparatus and pertinent data is automatically read from the card and provided as electrical signals to a calculating unit. Means are provided for the manual input of present meter readings to provide additional signals to the calculating unit. Output data from the calculating unit is imprinted on the customer card and pertinent data is also provided on a memory storage device which may be removed from the main device housing for further processing in the central office.

Abstract: An automated sample changing chemical analysis system for sequentially analyzing a series of samples such as pharmaceutical chemical samples, the system being particularly useful for dissolution rate testing. A pressure/vacuum source provides motivation for withdrawing each sample from its respective source in sequence through a sample selector valve and transporting the sample to the flow cell of a chemical analyzer such as an U.V. Spectrophotometer, and then returning all or part of the sample to its source through the same selector valve and purging the flow cell and conduits back to the sample source. In one form each sample is simply drawn by vacuum from its source through the selector valve into the flow cell and then the entire sample is returned after analysis, by air pressure, back through the selector valve to the source, while in another form a diluent or reagent is mixed with the sample in an intermediate step to bring the sample within the testing range of the analyzer.

Abstract: A jarring tool for use in a drill string to prevent sticking of the drill string during drilling operations. The jarring tool has a torque assembly for continually torquing the jar and thus the drilling operation need not be discontinued upon encountering an interfering object. The jarring tool is particularly suited for high viscosity drilling operations and eliminates hydrostatic sticking of the drill string by providing an immediate jarring action utilizing a simple hammer and anvil construction. The jarring tool is also suitable for use in a "fishing" string.

Abstract: Heat energy from hot geothermal fluids supplied by different temperature wells is transferred by heat exchange into a power fluid cycle, preferably of the dual fluid type, at different points in the cycle, which both enables an increase in peak cycle temperature to be achieved and allows more heat energy to be transferred into lower temperature points in the cycle. The result is an increase in the amount of power which can be developed per unit of geothermal fluid supplied.

Abstract: A sonic transducer incorporating a rigid plate-like transmitting member coupled to electromechanical compression wave generating means such as a piezoelectric crystal for transmitting sonic energy in a medium. The transmitting means is damped to prevent ringing, and the transducer is particularly responsive to the high frequency audio spectrum.

Abstract: Method and apparatus for the aquaculture of aquatic, non-air breathing, carnivorous animals, wherein a generally enclosed body of water is established, and aquatic non-air breathing, carnivorous species to be reared is disposed in said body of water, a filter-feeding aquatic non-air breathing species is also disposed in said body of water, and an aqueous euphotic zone containing phytoplankton is established in said body of water; the excreta from said carnivorous and filter-feeding species providing nutrients to said phytoplankton, said phytoplankton at least in part providing the food for said filter-feeding species, and said filter-feeding species at least in part providing the food for said carnivorous species.