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. 19, 1988
Filed:
Apr. 15, 1987
Applicant:
Inventor:
Ronald D Ingraham, Quincy, MI (US);
Assignee:
Nartron Corporation, Reed City, MI (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ; H05B / ;
U.S. Cl.
CPC ...
307116 ; 307308 ; 307632 ; 315362 ; 328-5 ;
Abstract
A switching circuit includes a source of direct current for operating an oscillator which in turn applies a signal to a detector circuit including a touch plate. The detector includes a voltage dividing capacitive system or, in one embodiment, a phase detector circuit. In either embodiments, the output signal from the phase detector circuit or the voltage divider provides a control signal which can be used for actuating a solid-state switch such as a transistor or the like for providing control functions.