The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 30, 1990
Filed:
Apr. 25, 1988
Jerome J Free, Jr, Lansdale, PA (US);
James C Rodgers, Pipersville, PA (US);
Davie B Lawhon, Furlong, PA (US);
Betz Laboratories, Inc., Trevose, PA (US);
Abstract
In a treatment system for feeding a liquid from a tank having an outlet by a controllable pump operated cyclically, an automatic calibration/measuring system. The system is arranged for determining the volume of liquid pumped each cycle of operation by the pump and comprises a hollow sight glass having first and second sensors coupled thereto. The sight glass is in fluid communication with the tank. The first sensor is arranged to provide a first signal when the level of liquid in the container reaches it while the second sensor, which is located below the first sensor, provides a second signal when the level of liquid in the container reaches it. The container defines a predetermined volume between the first and second sensors. The system also includes a controller to determine the actual number of cycles of operation of the pump required to pump the predetermined volume and if that number has deviated from a preestablished number. If so, the pump is controlled in response to the detected deviation. The system also enables the quantity of liquid in the tank and its specific gravity to be determined.