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:
Apr. 03, 2001
Filed:
Sep. 22, 1994
Applicant:
Inventors:
Richard G. Gibb, Olympia Fields, IL (US);
Paul D. Graham, La Grange Park, IL (US);
Assignee:
Federal Signal Corporation, University Park, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B06Q 1/54 ;
U.S. Cl.
CPC ...
B06Q 1/54 ;
Abstract
Method and apparatus for increasing the effectiveness of emergency signalling devices on vehicles. An emergency signalling device such as a flashing light is repeatedly operated at a frequency rate that corresponds to the speed of the vehicle. A minimum repetition rate is employed when the vehicle is slow or stopped so that the signal is not similarly halted, and a maximum rate is employed above a certain speed so that the repetition rate is not at too high of a frequency to be perceived.