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:
May. 14, 2002
Filed:
Mar. 17, 1999
Jerry R. Smith, Littleton, CO (US);
Charles D. Angert, Colorado Springs, CO (US);
Other;
Abstract
A motion detection system for detecting an object's movement through a threshold in a selected direction comprises first and second transmitters for producing respective broadcast signals across the threshold along respective transmission paths, a receiver circuitry operative in an absence of movement through the threshold to receive the broadcast signals and generate a receiver circuitry reference signal, and operative upon interruption of both broadcast signals within a selected period of time to generate receiver circuitry interrupted output corresponding to movement of the object, respectively, through first and second transmission paths. Processing circuitry monitors the receiver circuitry and operates upon detection of the receiver circuitry interrupted output to produce an event detection signal, and output circuitry responds to generate selected output, thereby indicating movement of the object through the threshold in one of two movement directions. A methodology of detecting object movement through a threshold is also provided.