Measuring and testing – Liquid level or depth gauge – Float
Patent
1977-05-23
1978-09-12
Queisser, Richard C.
Measuring and testing
Liquid level or depth gauge
Float
346 72, 346118, G01F 2308
Patent
active
041127617
ABSTRACT:
This invention relates to an apparatus for measuring and recording the changes in magnitude of a variable. The apparatus includes a recording stylus or pencil and a means for carrying a recording medium such as marking paper. The stylus or the means for carrying is connected to a transducer means which follows the changes in magnitude and provides an output to drive the stylus along the width of the paper in one direction when the magnitude is increasing and in the other direction when the magnitude is decreasing. In addition, either the stylus or the means for carrying the paper are connected to rotating means which rotate in one direction only and which are also driven by the output of the transducer. As the rotating means rotates in one direction only, the stylus will produce a straight line along the width of the paper when the output of the transducer is in one direction, and a straight line at an angle to the first line, when the output of the transducer is in the opposite direction. The transducer output direction, of course, reflects an increase or decrease, respectively, in the magnitude of the variable.
REFERENCES:
patent: 1336090 (1920-04-01), Schaub
patent: 1964632 (1934-06-01), Hays
patent: 2108037 (1938-02-01), Au
patent: 2215542 (1940-09-01), Chappell et al.
patent: 3303510 (1967-02-01), Jones
patent: 3504369 (1970-03-01), Kashkin, Jr. et al.
Engelhardt Bernard H.
Mintz Marcus
Brown Charles E.
Queisser Richard C.
Roskos Joseph W.
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