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:
Nov. 13, 2001
Filed:
Apr. 19, 2000
Applicant:
Inventors:
Paul C. Welling, Killingworth, CT (US);
James L. Stopa, Old Saybrook, CT (US);
Assignee:
Whelen Engineering Company, Inc., Chester, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B 3/00 ;
U.S. Cl.
CPC ...
G08B 3/00 ;
Abstract
The duration of variations in the potential applied to a single electrical contact, when compared to a reference potential, are measured and employed to command either incrementing or decrementing of an address. The addresses are associated with a table of instructions and an addressed instruction, when read, will produce a discrete warning signal. A desired one of several light flash or audible patterns may be selected by step-wise scrolling through the table in response to manually varying the contact potential.