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. 16, 1987
Filed:
Aug. 01, 1984
Applicant:
Inventors:
Wesley H Patton, Atlanta, GA (US);
Jeffrey L Thompson, Lawrenceville, GA (US);
Assignee:
Southern Railway Company, Washington, DC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B64C / ; E01B / ;
U.S. Cl.
CPC ...
318649 ; 318624 ; 104-71 ; 104-72 ; 33338 ; 33287 ;
Abstract
An electronic levelling apparatus using an inclinometer mounted to a platform for sensing deviations from the horizontal and generating an output signal representative thereof, filtering the inclinometer output signal to remove electromagnetic and radio frequency interference, level-shifting the filtered inclinometer output signal to establish both positive and negative threshold voltages, determining positive and negative voltage level shifts to generate a level control signal therefrom and transmitting the level control signal to an actuating mechanism for maintaining the platform level.