Abstract: Processes and apparatus for treatment of flowing slurries of particulate material mixed in liquid employ a wide, elongated downwardly-slanted, metal tray with upturned edge flanges, cable-suspended for unrestrained vibratory flexing and undulation. The tray is provided with a plurality of ultrasonic transducers mounted on its underside, and the flowing slurry is delivered to the upper tray end, flowing lengthwise down the tray in a shallow flowing sheet. Ultrasonic vibratory energy coupled through the tray to the flowing slurry has a "microscopic scrubbing" action on all particles and agglomerates, breaking the surface tension on the particle, cleaning particle surfaces, and separating different constituent particles and coatings of gels, slimes, algae, clay or mud. Mixtures of fine particles of coal or other valuable minerals with ash, clay, rock or sand particles are separated with unexpected efficiency by these techniques.

Abstract: An adjustable compound leverage bowstring release which may be held in the hand of an archer includes a housing assembly, a latch cam which is pivotally mounted to the housing assembly and a trigger cam which is also pivotally mounted to the assembly. The housing assembly has an outer contour which is shaped to be grasped by the hand and also has a slot for receiving a bowstring. The latch cam has a notch which receives the bowstring when the bowstring is pulled into the housing assembly slot. As the bowstring is pulled back into the slot, the latch cam is pivoted from its open position to a latched position. In its latched position a lever portion of the latch cam moves through a lever pathway. The trigger cam then is pivoted so that a smooth wall on the trigger cam intersects the latch cam lever portion pathway to prevent the latch cam from returning to its open position.

Abstract: Apparatus for continuous ultrasonic cleaning all exposed surfaces of endwise advancing strip material employ an elongated ultrasonic cleaning chamber with entry and exit portals formed near the lower edges of its end walls through which the strip travels into, through and out of the cleaning chamber. Cleaning liquid flows continuously from the cleaning chamber through both portals and an overflow conduit into collection chambers from which it is drained, filtered, cooled and recirculated into the ultrasonic cleaning chamber at a high volumetric flow rate. Two parallel elongated ultrasonic plate diaphragms energized at substantially different ultrasonic frequencies flank the advancing strip immersed well below the free surface of liquid in the cleaning chamber, and sonic waves travel rapidly along the strip, cooperating with nearfield vibratory effects near the plate-liquid interface of both plates to achieve intense and highly efficient cleaning of the strip.

Abstract: A method is provided for dispensing beer rapidly into a series of containers for mass distribution to consumers at public gatherings such as stadiums, race tracks, etc. The beer is contained in kegs and is supplied to a multi-tap dispenser through a refrigerated supply line. A coolant is circulated around the beer in the supply line and in the dispenser for cooling the beer. The temperature of the beer is maintained sufficiently close to its freezing temperature as to permit pouring from the taps while preventing excessive foam from being generated in the containers as the beer is poured. Preferably, the beer is maintained at less than 34.degree. F and preferably within about 1/2.degree.-2.degree. F of its freezing temperature which is approximately 28.degree. F for most beer. The pressure drop in the beer supply line is also controlled in order to avoid excessive agitation of the beer.