Liquid level detection gauge and associated methods

Details Liquid level detection gauge and associated methods Liquid level detection gauge and associated methods

2005-11-08

2005-11-08

Larkin, Daniel S. (Department: 2856)

Measuring and testing

Liquid level or depth gauge

C073S29000R

Reexamination Certificate

active

06962078

ABSTRACT:
A gauge for detecting the level of ink in a printer's ink reservoir includes: a transmitter antenna adapted to be positioned adjacent to an outer surface of a printer's ink reservoir; a transmitter circuit operatively coupled to the transmitter antenna for generating a radio-frequency signal for transmission by the transmitter antenna; a receiver antenna; a receiver circuit for obtaining at least a portion of the radio-frequency signal received by the receiver antenna; and a processing circuit, operatively coupled to the receiver circuit, and configured to determine an approximate level of ink in the ink reservoir based upon, at least in part, a characteristic of the obtained portion of the radio-frequency signal, such as a voltage level of the obtained portion of the radio-frequency signal.

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