Device for continuously measuring the liquid level in a container
Patent 4142415 Issued on March 6, 1979. Estimated Expiration Date: 
October 11, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
October 11, 1997. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References3827300 InventorsAssigneeApplicationNo. 05/841111 filed on 10/11/1977US Classes:73/304CCapacitativeExaminersPrimary: Queisser, Richard C.Assistant: Roskos, Joseph W. Attorney, Agent or FirmInternational ClassesG01F 23/22 (20060101)G01F 23/26 (20060101) Foreign Application Priority Data1976-10-09 DEAbstractA device for continuously measuring the liquid level in a container, wherein a capacitive sensor is disposed in the liquid to be measured and is connected with an oscillator as the frequency controlling element thereof, the output of the oscillator being connected with a suitable indicator or control, and wherein the capacitive sensor is formed of an elongate flexible strip of insulating material having opposite faces, with a plurality of elongate conductive elements embedded in the strip of material spaced approximately equidistantly from the opposite faces so that an electric field generated between the conductive elements can be substantially equally acted upon simultaneously on both sides of the device by the liquid to be measured, thereby enhancing the sensitivity of the sensing element, and enabling linear gauge characteristics to be obtained in irregularly shaped containers. | |
