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:
Jun. 21, 1983
Filed:
Jun. 08, 1981
Applicant:
Inventor:
James P Walber, Cedar Grove, WI (US);
Assignee:
W. H. Brady Co., Milwaukee, WI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H03K / ;
U.S. Cl.
CPC ...
307522 ; 307246 ; 328138 ;
Abstract
Detection circuitry for a capacitance switch including a source of two-state electrical pulses that are supplied to two clock nodes 180.degree. out of phase, a buffer connected to one of the switch connection nodes, means between the clock nodes and the switch connections to maintain the buffer input at one condition when the capacitance switch is closed and to cause the buffer input conditions and the buffer output signal to vary with the two-state pulses when the capacitance switch is open, and a frequency detector connected to the buffer output.