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:
Jul. 13, 1999
Filed:
Apr. 02, 1997
Applicant:
Inventors:
Gregory A Peterson, South Barrington, IL (US);
James W Ensinger, Palatine, IL (US);
Assignee:
Emerson Electric Company, St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ;
U.S. Cl.
CPC ...
307104 ; 307116 ; 257428 ; 340551 ; 340552 ; 361179 ;
Abstract
A non-contact switch movs from an off position to an on position when a lossy material enters a sensitive area of the switch. The non-contact switch comprises a transmitting element and a sensing element. The transmitting element is capable of radiating a signal. A portion of the signal passes through the sensitive area of the switch. The sensing element is capable of receiving the signal. When the received signal is less than a predetermined level, the received signal represents the lossy material entering the sensitive area of the switch.