Boots – shoes – and leggings
Patent
1988-04-25
1990-01-30
Teska, Kevin J.
Boots, shoes, and leggings
73168, 73223, 364502, 364550, 36457101, 417 18, G06F 1546, G01M 1900
Patent
active
048977977
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.
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Free, Jr. Jerome J.
Lawhon Davie B.
Rodgers James C.
Betz Laboratories Inc.
Teska Kevin J.
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