Liquid level control apparatus

• US 3,170,479 A
• Filed: 01/17/1962
• Issued: 02/23/1965
• Est. Priority Date: 01/17/1962
• Status: Expired due to Term

• Current Assignee: Richard J. Mueller
• Original Assignee: Richard J. Mueller
• Inventors: Mueller, Richard J.
• Application Number:
  US04/168,574
• Time in Patent Office: 1,133 Days
• US Class Current: 137/392
• CPC Class Codes: G01F 23/243 Schematic arrangements of probes combined with measuring circuits
• CPC Class Codes: G05D 9/12 characterised by the use of electric means
• CPC Class Codes: Y10T 137/7306 Electrical characteristic sensing
• CPC Class Codes: Y10T 137/8342 Liquid level responsive indicator, recorder or alarm

Claims

5. A FLUID LEVEL CONTROL APPARATUS FOR USE WITH A CONTAINER OF ELECTRICALLY CONDUCTIVE FLUID, COMPRISING:

VALVE MEANS OPERABLE TO FEED FLUID INTO SAID CONTAINER;

AND MEANS FOR SENSING THE LEVEL OF SAID FLUID INCLUDING, ELECTRODE MEANS HAVING AT LEAST ONE ELECTRODE NORMALLY IN CONTACT WITH THE FLUID, FIRST SWITHCH MEANS FOR CONTROLLING THE OPERATION OF SAID VALVE MEANS, SECOND SWITCH MEANS FOR CONTROLLING THE ENERGIZATION OF SAID ELECTRODE MEANS, ELECTROMAGNETIC MEANS RESPONSIVE TO A LOSS OF CONTACT BETWEEN THE FLUID IN SAID CONTAINER AND SAID ONE ELECTRODE MEANS, FOR CLOSING SAID FIRST SWITCH MEANS TO OPERATE SAID VALVE MEANS TO FEED FLUID TO SAID CONTAINER, AND OPENING SAID SECOND SWITCH MEANS TO DE-ENERGIZE SAID ONE ELECTRODE;

AND MEANS FOR SHUNTING OUT SAID ELECTROMAGNETIC MEANS WHEN THE LEVEL OF FLUID IN THE CONTAINER RISES TO A PREDETERMINED LEVEL FOR THEREUPON OPENING SAID FIRST SWITCH MEANS SAID SECOND SWITCH MEANS.