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, 2017
Filed:
May. 16, 2014
Applicant:
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Inventors:
Sunil S. Patel, Rockford, IL (US);
Frank J. Ludicky, Machesney Park, IL (US);
Assignee:
Hamilton Sundstrand Corporation, Charlotte, NC (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 23/02 (2006.01); G01R 1/30 (2006.01); G01R 23/15 (2006.01);
U.S. Cl.
CPC ...
G01R 23/02 (2013.01); G01R 1/30 (2013.01); G01R 23/15 (2013.01);
Abstract
A frequency monitoring circuit includes a monitoring lead, a D-type flip-flop, and a one-shot. The D-type flip-flop has a switchable logic state, a clear input, and a clock input. The one-shot has an input and an output connected to the D-type flip-flop clear input. The monitoring lead connects the one-shot input to the latch clock input for switching the logic state of the D-type flip-flop based on change in voltage applied to the monitoring lead.