公开(公告)号：US3578245A

公开(公告)日：1971-05-11

申请号：US3578245D

申请日：1969-07-29

申请人： GLOVER B BROCK

发明人： BROCK GLOVER B

IPC分类号： A01G25/16 ,  H04Q9/10 ,  A01G25/02

CPC分类号： A01G25/162 ,  H04Q9/10 ,  Y10S239/15

摘要： A fluid distribution system is shown which includes a plurality of electrically actuated valves. Each valve is associated with a selectively activated switching device responsive to a particular control signal of preselected frequency. A band-pass filter is connected between each switching device and a source of control signals having differing frequencies and preselected durations for activating the switching devices. The source of control signals may be a source of prerecorded signals, such as a replacable cassette, or a preprogrammed oscillator arrangement.