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. 09, 2003
Filed:
Jan. 08, 1997
Applicant:
Inventors:
Jonathan Dahlstrom, Highland, MI (US);
Donald E. Ellison, Mt. Clemens, MI (US);
Richard Ratke, Dearborn, MI (US);
Assignee:
Lear Automotive Dearborn, Inc., Southfield, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01M 1/900 ; G01R 3/1327 ; G01L 5/22 ;
U.S. Cl.
CPC ...
G01M 1/900 ; G01R 3/1327 ; G01L 5/22 ;
Abstract
A method of testing a switch looks at the second derivative of the resistance force to movement. The second derivative is most indicative of the feel the operator will experience when utilizing the switch. It is desirable to keep the second derivative to a minimum for the switch at locations other than end of travel or detent positions. By investigating the second derivative, one is provided with feedback of areas on the switch that might require further investigation or re-evaluation.