Direct liquid level reading device
First Claim
1. A liquid level measuring device comprising:
- a vertical guide having a fixed vertical scale for a vessel or a body of liquid mounted on the vertical guide, the fixed scale having a vertical series of horizontal binary coded bits representative of binary coded numbers indicating linear divisions;
float means to raise and lower with liquid level, said float means having means for cooperating with portions of said vertical guide for keeping the float means movable in a substantially vertical path adjacent the fixed vertical scale while maintaining a controlled distance from the fixed scale;
reading head on the float means to read each of the horizontal binary coded bits individually on the fixed scale representing liquid level, andconnection means for providing a level signal from the reading head to a means for displaying an indication of liquid level.
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Abstract
A digital liquid level measuring device determines the liquid level by reading a scale of a vertical series of horizontal binary coded numbers representing linear divisions. The measurement is direct rather than inferential and provides more accurate reading than existing methods. The digital measuring system does not suffer from the disadvantages of signal stability, drift, accuracy, calibration, error detection and size of range. The device has a fixed vertical scale, a float movable in a substantially vertical path maintaining a controlled distance from the fixed scale, a reading head on the float to read each of the horizontal binary coded numbers individually on the scale representing liquid level and a connection from the reading level to a display which provides an indication of liquid level.
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Citations
8 Claims
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1. A liquid level measuring device comprising:
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a vertical guide having a fixed vertical scale for a vessel or a body of liquid mounted on the vertical guide, the fixed scale having a vertical series of horizontal binary coded bits representative of binary coded numbers indicating linear divisions; float means to raise and lower with liquid level, said float means having means for cooperating with portions of said vertical guide for keeping the float means movable in a substantially vertical path adjacent the fixed vertical scale while maintaining a controlled distance from the fixed scale; reading head on the float means to read each of the horizontal binary coded bits individually on the fixed scale representing liquid level, and connection means for providing a level signal from the reading head to a means for displaying an indication of liquid level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification