Method for making a resistive level sensor
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United States of America Patent
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-
Jul 12, 1988
Issued Date -
N/A
app pub date -
Oct 22, 1986
filing date -
Oct 10, 1984
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention pertains to gauge apparatus for measuring liquid levels comprising an elongated electrical sensor adapted to be arranged in upright position while immersed so constructed as to have an electrical resistance which may be varied. The sensor is fabricated by providing a rigid elongated support and securing an elongated array of resistors thereto. A flexible layer of conductive material is then applied to the surface of a sheet of flexible insulated material after which the sheet is secured to the support with the conductive material facing the resistors. After the sheet is secured to the support, it is heated, whereby the sheet will return to a position in spaced relation from the resistors. Further, an elongated planar magnet is secured to the rigid support on the side facing the sheet. The magnet is polarized such that the surface facing the sheet has elongated contiguous opposite poles joined along a straight line. The array of resistors is mounted on the magnet surface.
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