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:
Dec. 08, 1992
Filed:
Jul. 31, 1990
Applicant:
Inventor:
Thomas M Fredericks, Westbrook, CT (US);
Assignee:
Whelen Technologies, Inc., Chester, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08G / ;
U.S. Cl.
CPC ...
340935 ; 340554 ; 342 69 ; 364436 ;
Abstract
The direction of motion of objects is sampled to determine, in a manner in which substantially avoids false alarms, whether there is object motion in a direction of interest. Systems employing such sampling methodology generate a warning signal in response to a vehicular traffic condition of interest and include at least a pair of motion detectors. Each motion detector processes motion information bearing signals to determine distance traveled in a predetermined time period to minimize false alarms.