专利名称：AUTOMATIC CONTROL OF CHEMICAL CONCENTRATION
七言绝句硬笔书法申请号：JP1051669减肥适合吃的食物有哪些
申请日：19690214
理想家园公开号：JPS4828230B1
公开日：
猜的成语>燃气安全
19730830
天然海绵专利内容由知识产权出版社提供
摘要：1,245,102. Automatic concentration control. N. C. HARPER, J. H. MARSHMAN and H. T. MARSHMAN. Feb.13, 1969 [Feb.15, 1968], No.7537/68. Heading G3R. The water in a swimming pool is repeatedly sampled at intervals and a disinfectant injector automatically controlled in dependence on measurements of the disinfectant concentration in the samples. In Fig.7, a solenoid-operated valve 81 is periodically opened under the control of a cam driven by a motor 24 so that samples of water drawn from a swimming pool by a pump 12 and being returned to the pool at 15 are periodically collected in a glass test chamber 32. Further cams driven by motor 24 cau operation of a pump 83 to add a quantity of chlorine indicator from a tank 26 to chamber 32 and operation of an electromagnetic vibrator 85 to agitate the mixture. The amount of blue light transmitted through chamber 32 and received by a photo-voltaic cell (not shown) is dependent on the concentration of chlorine in the swimming pool and if, for any sample, this is less than a predetermined value corresponding to a small quantity of free chlorine, a bridge circuit including the photo-cell becomes unbalanced in such n as to operate, through transistors and a silicon controlled rectifier, an electromagnetic relay which adds a do of chlorine to the pool. The electronic circuit is duplicated for reliability. In a modification, the motor-driven cams mechanically operate a valve supplying water from
the pool to the sampling chamber and a piston pump supplying the indicator to the sample which are integral with a glass block forming the sampling chamber.
慢性咽炎中药处方
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