Abstract: An improved method and apparatus for heating fluids wherein separate gas streams of natural gas and air are compressed to a preselected pressure, passed to an injection and mixing zone for thorough mixing including expansion of one gas and compression of the other, passed to a combustion chamber for burning with the combustion products being further contracted and passed to a heat exchanger conduit where such combustion products are progressively further contracted as they are brought into heat exchange with the fluid to be heated.

Abstract: Apparatus for controlling bleed gas in the bleed gas system of a compressor for gas turbine engine wherein a valve disposed in the bleed conduit of a compressor is moved from closed to open position in a selectively controlled manner in accordance with a preselected bleed gas pressure sensed in the bleed gas system of the compressor.

Abstract: A fuel supply system for a fuel spray combustor nozzle of a portable heater including a pump connected to the fuel spray combustor nozzle on the high pressure side thereof and alternatively connectable on the low pressure side to an on-board fuel chamber storage means or to an off-board storage supply through an actuable valve and solenoid system connected by fluid piping, valves and fittings extending between the on-board nozzle, pump, and storage chambers and toward off-board supply.

Abstract: A method and apparatus for purifying and/or separating fluids including passing such fluid from a feed side of a reverse osmosis unit to the product side of such unit and to an ultimate user during a purifying cycle and recirculating residual fluid back to the feed side in bypass relation to the reverse osmosis unit during a treating cycle to introduce suitable treating fluids into the system for disinfecting and rejuvenating the system.

Abstract: A method and apparatus for preparing a decontamination fluid including passing the fluid from a supply source to a low pressurization zone prior to heating the fluid, heating at least a portion of the low pressurized fluid and passing the heated fluid to a high pressurization zone prior to introducing the heated fluid to the decontamination zone.

Abstract: An improved arrangement for a pulse jet engine assembly wherein pulsations of the engine are utilized to operate a motive source for a fuel pump which pumps fuel from a fuel supply source to the engine, the entire pulse jet engine assembly being internally self-sufficient after initial starting operation.

Abstract: A fuel burner assembly for providing a stable, non-pulsating flame wall proximate to a burner duct outlet thereof including structure which causes a combustion air stream to flow radially outwardly and then inwardly across a fuel supply outlet and spaced igniter centrally positioned adjacent the duct outlet, the stream then being divided into three flow paths, one path being axial, another being centrally rotated and a third being annularly compacted to stabilize the produced flame wall proximate the duct outlet.

Abstract: Apparatus for repairing and straightening a vehicle frame of an automobile including a rigid base frame having cantilevered beams to receive vehicle clamps adjustable thereon, the base frame being expansible and compressible within the wheel base and tread of a vehicle to be repaired and the beams extending beyond the sides of such vehicle--a jack adaptor, clamp modifiers and a link chain shortener being cooperable with the cantilevered beams.

Abstract: Cutlery sharpening method and apparatus for sharpening a cutlery blade edge wherein the blade edge to be sharpened is pivoted into and yieldingly moved along a blade sharpening surface when moved in one direction and pivoted out of and moved above the blade sharpening surface when moved in an opposite direction.

Abstract: An improved fuel container support system for a combustion engine including an engine support frame having a moveable fuel container support shelf mounted thereon, the shelf being structured to move from a non-operating to an operational position to hold a fuel container at an angle to the horizontal for efficient fuel flow operation during engine running with the container positioned away from the engine during such running.

Abstract: Portable air heating apparatus for supplying heated air to a plenum chamber including a partitioned housing with at least two chambers, one of which is sound-conditioned to contain a power member, the housing having therein a blower and radiator connected to the sound-conditioned power member, a heat exchanger communicating with the blower, heated air passing from the heat exchanger in the housing to the plenum chamber and recirculated therefrom back to the housing over the radiator before returning to the blower.

Abstract: A puzzle game and a method of manufacturing the same including separate geometric segments of a total picture image removably fastened in jumbled fashion in a first defined area and a visibly marked grid in a second defined area forming the same geometrically shaped segments as in the first area whereby the jumbled segments can be transferred from the first area to the second area to form a correct picture image within the visible grid.

Abstract: A flow control apparatus for a protective shelter including valve means to allow preselected maximum and minimum amounts of air flow into the shelter depending upon ambient contaminant concentrations.

Abstract: A game device including first and second areas with the first area having a number of visible questions, each having a visible identifying indicia associated therewith and at least two visible answers with invisibly marked designations indicating correctness of the answer of the question responded to and a second defined area having random chance selection means to indicate the question to be responded to by a player.

Abstract: A method and apparatus for rapidly chilling a cool pack associated with a refrigeration system wherein slush-like medium is introduced into the pack in a first step and frozen to a substantially solid state in a second step.

Abstract: A method and apparatus for rapidly chilling a cool pack associated with a refrigeration system wherein slush-like medium is introduced into the pack in a first step and frozen to a substantially solid state in a second step.

Abstract: A method and arrangement for circulating condenser cooling air through the condenser section of an air conditioner used in dusty and windy environments. The condenser section includes an air cooled fin-tube type condenser secured across a straight duct extending vertically through the horizontal housing of the air conditioner. During operation of the air conditioner, an axial flow fan mounted within the duct draws ambient air into the duct through an opening in the bottom of the housing in a direction generally perpendicular to the natural wind flow in the vicinity of the air conditioner and directs the air through the condenser whereafter it is discharged to atmosphere.

Abstract: A damper control arrangement wherein a damper blade opens and closes a flow-through orifice in response to selective moving means, the selective moving means moving the damper blade a preselected distance from the orifice opening to vary the opening of the orifice for a predetermined period of time prior to moving the damper blade to a fully open position.