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:
Dec. 16, 1997
Filed:
May. 31, 1996
Daniel Fontanille, Hermeray, FR;
Jacques Barbot, Clamart, FR;
GEC Alsthom Stein Industrie, Velizy-Villacoublay, FR;
Abstract
The present invention concerns a device for monitoring a ball grinder having a cylindrical casing containing a mass of balls which, when the grinder is rotating at its nominal speed, takes up a position between two generatrices (1.sub.b, 1.sub.b') spaced by an angle between a minimal angle .alpha..sub.min and a maximal angle .alpha..sub.max and a mass of coal which, when the grinder is rotating at its nominal speed, takes up a position between two generatrices (1.sub.c, 1.sub.c') spaced by an angle .beta.. An electromagnetic wave emitter is disposed inside the grinder and at least one wave receiver is disposed outside the grinder. The receiver is associated with an electronic circuit for determining at least one parameter of the grinder selected from the quantity of balls, the quantity of coal and the wear of the cylinder.