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:
Sep. 04, 2001
Filed:
Jun. 18, 1999
Applicant:
Inventor:
Christopher Gavin Brickell, Mukilteo, WA (US);
Assignee:
Eaton Corporation, Cleveland, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 4/014 ;
U.S. Cl.
CPC ...
H01J 4/014 ;
Abstract
A mechanism for indicating the degree of alignment of a photoelectric sensing system produces a pulse width modulated signal in response to the intensity of light received by the sensing system. That signal has pulses which occur at a fixed frequency, but which vary in duration in response to the received light intensity. The pulse width modulated signal drives an indicator, such as a sound or light emitter. With this technique, the output of the indicator is pulse width modulated to indicate the intensity of the received light and thus the degree of alignment of the sensing system.