In a first embodiment, a source of fluid under pressure is supplied to a conduit that is terminated by a transverse resonant cavity preferably having a square cross section. The cross section of the conduit and the cavity are dimensionally related. In a second embodiment, a shock wave generator is coupled to a transverse resonant cavity. The component wavelengths of the shock waves and the cross-section of the cavity are dimensionally related. A third embodiment combines the first and second emb...

A tapered enclosure for a body of water has a wave generator positioned in a relatively narrow and deeper end. In one form, the wave generator is a buoyant plunger mounted for vertical reciprocation within a chamber having a shorewardly facing opening. Through a cyclic control system, the plunger is driven in phase with the forces of gravity and buoyancy acting thereon, starting from a rest position through strokes of increasing amplitude until a desired steady state is attained to sequentially ...

An apparatus for providing, in a continuous or intermittent manner, a superheated vapor of an organic liquid, such as methylene chloride, for reflowing plastic surfaces or causing a plastic material to flow onto a surface to create a film or coating thereon. The apparatus includes a tubular metal member defining a flow passage for both the liquid and gaseous phases of the liquid being vaporized. A vapor flow control member having a vapor flow orifice is provided at one end of the tubular member ...

Mixed potassium-cesium seeding of a high temperature combustion gas is employed in production of electricity by means of an open-cycle MHD generator.

A radio aerial is disclosed by which planar beams can be swept through wide angles in space without the need for moving aerials, and which may be used in radio location systems using scanning beams and in radio navigation systems. The aerial consists of a reflector the surface of which is, or approximates part of, a surface produced by the rotation of a generating curve of finite length about an axis, and a plurality of radiating elements disposed about an arc centred on the axis of rotation whi...

A support housing for on-site radioisotope generation is disclosed in which the formation of a short-lived daughter radioisotope from its longer-lived parent features countercurrent batch flow of the eluting reagent interior of the housing.

This invention relates to a system for generating power utilizing the elevation differences and available temperatures on the earth's surface, such as occurs in a mountainous region with a nearby valley or desert. The system includes heat rejection means, as for example, a condenser located at a higher elevation (a mountain top). Means for supplying heat to the system may be provided at a lower elevation (in a valley or desert region below). A geothermal source of heat, such as a hot spring, may...

A heat-to-electricity converter is disclosed which includes a radioactive heat source and a thermoelectric element of relatively short overall length capable of delivering a low voltage of the order of a few tenths of a volt. Such a thermoelectric element operates at a higher efficiency than longer higher-voltage elements; for example, elements producing 6 volts. In the generation of required power, thermoelectric element drives a solid-state converter which is controlled by input current rather...

Supplementary means for heating liquid in a steam producing boiler comprising an electrical heating unit located in the boiler, the current for which is produced by an electric generator driven by a steam operated turbine. The turbine may utilize all or only part of the steam output of the boiler. Where the turbine uses substantially all of the steam, the generator driven by the turbine will have excess capacity to be used to drive a motor. Where the turbine uses only enough steam to drive a gen...

A continuous ozone generation and recovery system is provided including a source of oxygen-rich gas; at least one high-throughput corona generator; means for passing the oxygen-rich gas through an electrical corona at a high ratio of gas volume:electrode area to synthesize ozone in a concentration not greater than 1 wt% in the gas stream; means for cooling the generator and maintaining the ozone-containing oxygen stream below decomposition temperature; means for cooling the ozone-containing oxyg...