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:
Feb. 25, 1992
Filed:
Dec. 04, 1990
Applicant:
Inventor:
Karl-Heinz Berger, Herten-Langenbochum, DE;
Assignee:
Bochumer Eisenhutte Heintzmann GmbH & Co. KG, Bochum, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21F / ; G08B / ;
U.S. Cl.
CPC ...
299-1 ; 340683 ; 367198 ;
Abstract
The noise spectrum in a mining chamber is captured by at least one microphone and is digitized and filtered to separate an operation-typical pattern from an operation atypical pattern. The operation atypical pattern is compared with reference patterns to establish the malfunction or vocal command or emergency and the apparatus is automatically operated in response thereto.