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. 04, 1985
Filed:
Jun. 30, 1983
Lawrence J Ryczek, Nashotah, WI (US);
William J Janutka, West Allis, WI (US);
Eaton Corporation, Cleveland, OH (US);
Abstract
A comparator timer 2 is disclosed in which charging current and threshold trip voltage are both adjusted with a single potentiometer 6. Moving the pot wiper 8 in one direction increases the threshold trip voltage at the reference input terminal 12 of the comparator 4, such as the minus terminal of an operational amplifier, and at the same time decreases the capacitor charging current to the comparing input terminal 16, such as the plus terminal of the op amp, to lengthen the timing interval. Moving the pot wiper 8 in the other direction decreases threshold trip voltage and concurrently increases capacitor charging current to shorten the timing interval. The circuit affords expanded timing range, reduced power consumption and improved adjustment resolution, which are ideal for proximity switch applications, particularly photoelectric type proximity switches.