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. 04, 1991
Filed:
Feb. 26, 1990
Applicant:
Inventors:
Stephen L Bessinger, Morgantown, WV (US);
Michael G Nelson, Fairbanks, AK (US);
Assignee:
Consolidation Coal Company, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21D / ; G01B / ;
U.S. Cl.
CPC ...
299-1 ; 342126 ; 364420 ; 364560 ;
Abstract
Mine panel alignment is controlled by recording the electromagnetic phase modulation and/or signal attenuation between spaced distant transceivers in the panel and a transceiver on a cutting machine to measure the distance between the transceivers. Through trilateration, the position of the cutting machine with respect to the known fixed locations can be determined and adjustments made to the cutting machine functions to maintain desired panel alignment.