Abstract: An improved continuous run sluice box having a sonic vibration and ultrasonic vibration means for concentrating gold or other precious metals while eliminating the loss of black sands containing other valuable fines normally accompanying the use of conventional sluices. The sluice includes a novel type riffle construction including a vertical wall and a sloping wall leading to a collecting area having a nylon cloth screen positioned between coarse and fine metallic screens which facilitates both the collection of the fines and the release of the same during flushing operations.

Abstract: A continuous run sluice box having vibrating and sonic vibration means for concentrating gold or other precious metal, while eliminating the loss of black sands normally accompanying the use of conventional sluices. The sluice box is provided with a sonic vibrating means, and it is mounted for rotation about its own peripheral axis. The sluice includes two parallel channels disposed on either side of a main floor, so that the uppermost channel may be in use, while the lowermost channel is cleaned by directing streams of water and sonic vibration against the clogged riffles, thereby eliminating down time normally involved in periodic cleaning.

Abstract: A portable dental cleaning device includes a housing having two separate chambers divided by a partition. A motor driven pump disposed in one chamber receives a cleaning slurry from the other chamber and discharges it under vibration pressure through a nozzle disposed outwardly of the housing for cleaning teeth and massaging gums. A switch mounted on the housing permits manual flow control of the cleaning slurry through the device.