Capacitive means for measuring the level of a liquid

• US 4,099,167 A
• Filed: 02/10/1977
• Issued: 07/04/1978
• Est. Priority Date: 02/10/1977
• Status: Expired due to Term

• Current Assignee: Emerson Electric Company
• Original Assignee: Duracell International Incorporated (Berkshire Hathaway Incorporated)
• Inventors: Pomerantz, Daniel I., Sandler, Louis M.
• Primary Examiner(s): Caldwell, Sr., John W.
• Assistant Examiner(s): Myer, Daniel
• Application Number:
  US05/767,533
• Time in Patent Office: 509 Days
• Field of Search: 340/244, 361/284, 361/330, 73/304 C
• US Class Current: 340/620
• CPC Class Codes: G01F 23/265 for discrete levels

Abstract

Electrodes are disposed on portions of a container comprising dielectric material, an electrical signal is capacitively transmitted between said electrodes, said electrical signal is shunted by the presence of a liquid in close proximity to said electrodes, and said shunting is detected.

Claims