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:
Feb. 14, 1978
Filed:
Feb. 28, 1977
Applicant:
Inventor:
Alan W Wilkerson, Thiensville, WI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324142 ; 364483 ; 364841 ; 328160 ;
Abstract
A watt meter circuit capable of providing an electrical signal indicative of power includes a signal forming means for providing a pair of signals proportional to current. The signals are equal to each other in magnitude but opposite in polarity and are provided in parallel through a switch to filter which provides the electrical power signal. The switch is operated by a signal generating means which generates a triangular wave form. The voltage to the watt meter is compared with the triangular wave form to vary the duty cycle of the switch and the magnitude and polarity of the output signal in accordance with the algebraic product of voltage and current.