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:
Apr. 04, 1989
Filed:
Nov. 10, 1987
Applicant:
Inventor:
Daniel R Weber, Groton, MA (US);
Assignee:
Data Instruments, Inc., Acton, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01V / ;
U.S. Cl.
CPC ...
250221 ; 2502221 ;
Abstract
An optical detection system of the sort adapted to enable and/or disable the operation of an associated industrial machine when an appropriate intrusion is detected. The optical intrusion detection system is adapted to have a variable sensitivity, whereby it can be set to respond to the intrusion of an object of a first size during one phase of operation of said machine and to an object of a second size during another phase of the operation of said machine.