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Gauge for measuring liquid levels

  • US 5,950,487 A
  • Filed: 09/20/1996
  • Issued: 09/14/1999
  • Est. Priority Date: 09/20/1996
  • Status: Expired due to Term
First Claim
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1. An apparatus for measuring the level of a liquid comprising:

  • (a) a flexible vertical measurement scale for measuring the level of a liquid, the scale having a binary code comprised of opaque and transmissive elements along its length indicative of specific levels of the scale, the code implemented such that the code is read by transmission of energy through portions of the code;

    (b) means for mounting the scale in the liquid, with a top end of the scale above the highest liquid level to be measured and a lower end of the scale below the lowest liquid level to be measured; and

    (c) first float designed to float on the liquid, the float unattached to and configured to move freely about the scale, the float including (i) energy transmission means for transmitting energy from a first side of the scale through transmissive portions of the scale, and (ii) energy receiving means on the opposite side of the scale, whereby the code for a specific level of the scale is read.

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