发明名称 |
Liquid level controller and soil test instrument |
摘要 |
A portable, automatic liquid level monitoring and recording instrument is disclosed for use in measuring the capacity of soils to absorb water. A self-contained power source, timer and vertically biasable recording probe are housed as a cylindrical package disposed for placement in a shallow bore hold and connected to a reserve water supply. The probe, carrying an ink filled stylus, scribes a graph lining the inside of the cylinder during excursions initiated by timer actuation, the direction of probe traverse being reversed by completion of a circuit when the probe contacts water. Water is replenished to the borehole to datum level automatically after completion of the downward traverse of the probe.
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申请公布号 |
US4072044(A) |
申请公布日期 |
1978.02.07 |
申请号 |
US19760664190 |
申请日期 |
1976.03.05 |
申请人 |
FARWELL, ALLEN C.;FARWELL, DALE E.;FARWELL, DUANE C. |
发明人 |
FARWELL, ALLEN C.;FARWELL, DALE E.;FARWELL, DUANE C. |
分类号 |
G01F23/24;G01N33/24;(IPC1-7):G01F23/10;G01N15/08 |
主分类号 |
G01F23/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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