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:
Nov. 28, 1978
Filed:
Apr. 28, 1977
Stephen C Thayer, Lewistown, PA (US);
Other;
Abstract
Disclosed is an apparatus for determining the number of moving objects which completely traverse a given path. The apparatus provides an array of light sensors which are placed adjacent the path. A scanner periodically samples the output of each sensor in the array and produces an output proportional to the ambient light in the path striking the sensor. This output is stored for comparison with future outputs so that changes in the ambient light in the path may be detected. Changes in ambient light at a particular sensor are compared with changes detected by adjacent sensors, first to prevent erroneous readouts and second to determine the direction of movement. Moving objects completely traversing the field are recorded.