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:
Jan. 26, 2016
Filed:
Feb. 20, 2012
Applicants:
Peter M. Willis, Benton Harbor, MI (US);
Joshua Allen Slavens, St. Joseph, MI (US);
Inventors:
Peter M. Willis, Benton Harbor, MI (US);
Joshua Allen Slavens, St. Joseph, MI (US);
Assignee:
Leco Corporation, St. Joseph, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01J 5/20 (2006.01); G01J 3/433 (2006.01); G01J 3/10 (2006.01); G01J 5/02 (2006.01); G01J 5/10 (2006.01);
U.S. Cl.
CPC ...
G01J 3/433 (2013.01); G01J 3/108 (2013.01); G01J 5/02 (2013.01); G01J 5/10 (2013.01); G01J 5/20 (2013.01);
Abstract
A pulse-width-modulated voltage is applied to an IR emitter during the on-time of a primary drive voltage having a frequency of about 2.5 Hz in order to control the power to a predetermined desired level. The secondary modulation is at about 800 Hz. The lower response time of the emitter will, in effect, filter the higher frequency, and it will appear that an average power is being applied to the emitter during the on-time.