B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
241/19, 92/43
B02C 7/14 (2006.01)
Patent
CA 1084020
ELECTRICALLY CONTROLLED SYSTEM FOR REGULATING THE GRINDING SPACE IN A GRINDING APPARATUS ABSTRACT OF THE DISCLOSURE A system for measuring and regulating the grinding space be- tween two metallic grinding discs and to prevent direct contact therebetween; one of the discs being rotated while the other one remains stationary to grind therebetween fibrous cellulosic mater- ial, such as moisture-containing wood chips, for pulp making. One of the discs is electrically insulated from the other parts of the system and is included in an electric circuit with the positive and negative terminals connected to the disc at points electrically insulated from one another, and the moisture in the wood chips collected in the grinding space is used to produce a conductive cell, such as an electrolytic variable resistance, which bridges the two terminals and closes the circuit. The resistance of the cell, which varies in response to fluctuations in the grinding space, is measured by an ammeter or similar measuring device which thus gives a reading of the width of the grinding space. The measuring device may be used to actuate means for regulating the width of the grinding space and to stop the grinding operation im- mediately upon contact between the grinding discs.
249632
Defibrator Aktiebolag
Marks & Clerk
LandOfFree
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