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:
Oct. 11, 1977
Filed:
Nov. 12, 1975
Applicant:
Inventor:
Kenneth Holford, Crawley, EN;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
343-9 ; 343 / ;
Abstract
A Doppler radar system for controlling portable traffic signals in response to on-coming traffic. Each of two channel amplifiers of the system is fixed at high gain and passes both noise signals and Doppler signals to a phase detector. A threshold element provides a control signal when the average level of the phase detector output between high and low levels changes sufficiently, due to the presence of Doppler signals, from a mean level which is due to noise alone.