Measuring and testing – Liquid level or depth gauge – Thermal type
Reexamination Certificate
2005-11-22
2005-11-22
Chapman, John E. (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Thermal type
C347S007000
Reexamination Certificate
active
06966222
ABSTRACT:
Representative embodiments provide for a media level measurement apparatus, including a sensor to provide an ambient temperature signal, a controller, and a source configured to provide an electrical current. Also included are a thermistor device configured to provide a level signal corresponding to a level of a media in contact with a lengthwise portion of the thermistor device during an application of the pulse of electrical current, and a signal processor configured to provide a media level signal in accordance with the level signal and the ambient temperature signal. A method includes the steps of supporting a lengthwise portion of a thermistor device in contact with a media, applying an electrical pulse to the thermistor device, sensing a level signal from the thermistor device after a predetermined period of time, and providing a media level signal in corresponding to the level signal.
REFERENCES:
patent: 4196625 (1980-04-01), Kern
patent: 4590797 (1986-05-01), Beaubatie et al.
patent: 4937598 (1990-06-01), Hine et al.
patent: 4973993 (1990-11-01), Allen
patent: 5136305 (1992-08-01), Ims
patent: 5386224 (1995-01-01), Deur et al.
patent: 5623291 (1997-04-01), Morandotti et al.
patent: 5992986 (1999-11-01), Gyotoku et al.
patent: 5996144 (1999-12-01), Hodgetts
patent: 5997121 (1999-12-01), Altfather et al.
patent: 6007173 (1999-12-01), DeLouise et al.
patent: 6024429 (2000-02-01), Coffy et al.
patent: 6098457 (2000-08-01), Poole
patent: 6142016 (2000-11-01), Kobayashi et al.
patent: 6312072 (2001-11-01), Hough
patent: 6662429 (2003-12-01), Domorazek
patent: 57168117 (1982-10-01), None
patent: 02147823 (1990-06-01), None
patent: 03028721 (1991-02-01), None
Beckwith et al., “Mechanical Measurements,” 1982, Addison-Wesley, 3rd., pp. 533-536.
Holman, “Experimental Methods for Engineers,” 1989, McGraw Hill, 5th Ed., pp. 296-299.
Carlson Gerard J.
Guillory Douglas M.
Smith David E.
Chapman John E.
Fitzgerald John
Hewlett--Packard Development Company, L.P.
LandOfFree
Methods and apparatus for media level measurement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Methods and apparatus for media level measurement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methods and apparatus for media level measurement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3511685