Liquid storage and measuring system

• US 3,312,107 A
• Filed: 09/25/1964
• Issued: 04/04/1967
• Est. Priority Date: 09/25/1964
• Status: Expired due to Term

• Current Assignee: Calvin J. Meierbachtol, Gene A. Burns
• Original Assignee: Calvin J. Meierbachtol, Gene A. Burns
• Inventors: Burns, Gene A., Meierbachtol, Calvin J.
• Application Number:
  US04/399,245
• Time in Patent Office: 921 Days
• US Class Current: 73/290.00V
• CPC Class Codes: G01F 23/284 Electromagnetic waves

Claims

1. APPARATUS FOR MEASURING THE QUANTITY OF LIQUID IN A TANK HAVING A BAND OF RESONANT FREQUENCIES INCLUDING A LOWER RESONANT FREQUENCY WHEN FULL OF THE LIQUID, AND A HIGHER RESONANT FREQUENCY WHEN EMPTY OF THE LIQUID COMPRISING GENERATOR MEANS RESPONSIVE TO INPUT TRIGGER SIGNALS FOR CYCLICALLY GENERATING OUTPUT SIGNALS THAT REGULARLY CHANGE OVER A PREDETERMINED RANGE OF FREQUENCIES IN THE TANK, SAID OUTPUT SIGNALS INCLUDING SIGNALS WITHIN THE BAND OF RESONANT FREQUENCIES, AND A START FREQUENCY SIGNAL OUTSIDE THE BAND, MEANS CONNECTED TO SAID GENERATOR MEANS AND RESPONSIVE TO A RESONANT FREQUENCY SIGNAL WITHIN THE BAND FOR PRODUCING THE INPUT TRIGGER SIGNALS TO EFFECT CYCLIC GENERATOR OF SAID OUTPUT SIGNALS BY SAID GENERATOR MEANS, AND MEANS CONNECTED TO SAID GENERATOR MEANS AND RESPONSIVE TO SAID START FREQUENCY SIGNAL IN SAID OUTPUT SIGNALS FOR GENERATING A SIGNAL INDICATIVE OF THE QUANTITY OF LIQUID IN THE TANK.