发明名称 |
Hall-effect fine resolution liquid level indicator |
摘要 |
A liquid level indicator apparatus provides direct readout of liquid level at high resolution using an array of vertically disposed Hall-effect magnetic switches. To overcome the limit to closer spacing of the switches imposed by their vertical dimension, they a disposed side by side horizontally and vertically by a distance less than the vertical dimension of each switch. They are mounted on a flat flexible substrate and then bent around into a hollow cylinder or prism shape. A floating magnet of annular shape surrounds the cylinder, or a magnet corresponding to the cylindrical or prismatic shape floats inside the surrounding circuit board. Several circuits are shown for displaying a liquid level readout resulting from the actuation of the switches by the magnet.
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申请公布号 |
US6481278(B1) |
申请公布日期 |
2002.11.19 |
申请号 |
US20010776877 |
申请日期 |
2001.02.06 |
申请人 |
PREDATOR SYSTEMS, INC. |
发明人 |
KAYLOR STEPHEN;SAMUELSON DUANE;YOWELL GORDON;BLUM ALVIN SEYMOUR |
分类号 |
G01F23/74;H01H36/02;(IPC1-7):G01F23/30;G01F23/36;G08B21/00;H01H35/18 |
主分类号 |
G01F23/74 |
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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