ARTICLE WASHING APPARATUS

An automatic article washing apparatus including a container for washing liquid and the articles such as articles of clothing being washed, liquid jet means in the container comprising a stacked assembly of a plurality of bistable fluidic switch amplifier elements each having a washing liquid supply port, an interaction chamber receiving liquid from the port, first and second diverging jet nozzle passages leading from each of the assembly of elements, first and second differential fluid pressure control channels leading to the interaction chamber and means for simultaneously supplying liquid under pressure to all the supply ports and means for providing differential fluid pressure to the first control channels and to the second control channels with the result that jets of liquid are projected selectively from the first jet nozzle passages and the jet nozzle passages merely by altering the differential fluid pressure conditions in the control channels.