Communications: electrical – Digital comparator systems
Patent
1979-07-18
1981-06-23
Yusko, Donald J.
Communications: electrical
Digital comparator systems
364509, 137386, H04Q 100, G06F 1500, G05B 1500, G05D 900
Patent
active
042753821
ABSTRACT:
Apparatus for determining the level of liquid in a vessel, e.g., storage tank comprises a plurality of indicators at varying heights along the vessel acting to indicate the presence of the liquid level at a given height; a controller to receive signals from the indicators and translate such signals into liquid level height; a memory device to store information from the controller for future use; and a display system to receive signals from the controller and provide a visual display of the liquid level height in the vessel. Preferably, the apparatus also includes a central monitoring station where signals from a plurality of controllers are received so that the liquid levels in a plurality of vessels can be displayed.
In additional preferred embodiments, the controller can collect information regarding vessel liquid temperature and/or the status of pumps, valves and the like which can change the liquid level in the vessel. A further embodiment is disclosed in which the controller sends out signals to alter the status of one or more of such pumps, valves and the like.
REFERENCES:
patent: 3350687 (1967-10-01), Gabrielson et al.
patent: 3646293 (1972-02-01), Howard
patent: 3653262 (1972-04-01), Ehrenfried et al.
patent: 3927800 (1975-12-01), Zinsmemeyer et al.
patent: 4090248 (1978-05-01), Swanson et al.
patent: 4101056 (1978-07-01), Mattimoe et al.
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