(19)
(11) EP 0 125 117 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
21.08.1985 Bulletin 1985/34

(43) Date of publication A2:
14.11.1984 Bulletin 1984/46

(21) Application number: 84303017

(22) Date of filing: 04.05.1984
(84) Designated Contracting States:
BE DE FR IT LU NL SE

(30) Priority: 04.05.1983 GB 8312129

(71) Applicant: William Boulton Limited
 ()

(72) Inventor:
  • Birks, Eric F/o William Boulton Limited
     ()

   


(54) Ball mill control device


(57) A control device for a ball mill includes sensing means to determine and signal the number of revolutions of the mill, the signals from the sensing means being passed to a preset counter and control assembly which when a predetermined number of driven revolutions has been counted deactuates the drive and counts the decelerating free-wheeling revolutions so that just before the mill stops rotating a brake can be applied to stop it and hold it with its discharge port in a predetermined position.






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