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:
Jan. 04, 1994
Filed:
Jul. 08, 1991
Applicant:
Inventor:
John Peterson, Toronto, CA;
Assignee:
Digital Security Controls Ltd., Downsview, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G08B / ;
U.S. Cl.
CPC ...
340522 ; 340506 ; 340521 ; 340565 ; 367 93 ; 367 94 ;
Abstract
An improved dual sensor motion detection system is disclosed wherein the sensitivity of at least one of the sensors is adjusted in accordance with the response signals or signal history received from the sensors. This arrangement has application for systems having at least two sensors and simplifies installation and adjustment of the system.