The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1982
Filed:
Sep. 11, 1980
Applicant:
Inventor:
Daryl D Dressler, St. Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340620 ; 340 59 ;
Abstract
Liquid level sensing circuitry provides storage of a signal upon operation of a switch. The signal stored is dependent on whether a probe is in contact with the liquid sensed. Provision is made to prevent storage of a different signal for a period of time should the switch be operated more than once during such period of time. A different discernible indication is produced for each stored signal.