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:
Jun. 28, 1994
Filed:
Dec. 30, 1992
Applicant:
Inventors:
Elik I Fooks, Middlesex County, MA (US);
Patrick J Delaney, III, Middlesex County, MA (US);
Philip E Johnson, Worcester County, MA (US);
Assignee:
Allen-Bradley Company, Inc., Milwaukee, WI (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ;
U.S. Cl.
CPC ...
2502221 ; 250221 ;
Abstract
A target acquisition system for a photoelectric control unit which helps avoid interference problems due to optical and electrical noise. The system provides for the interpulse interval between light pulses transmitted by the photoelectric control unit to be varied in accordance with pseudo-random jitter factors during the target acquisition process. Noise which may be on frequency with the normal repetition rate of the photoelectric control unit is then eliminated from the detection process pursuant to synchronous detection procedures.