Chapter XIII: Section 13: Crushing, Grinding, and Disintegrating

=250. Stamp mill,= generally arranged in a battery of 4 or 6, for gold and other ores.

=251. Stone-breaker,= with chilled iron jaw faces and toggle or knapping motion. See Blake’s, H. R. Marsden’s, and other modifications in common use.

=252. Double edge-runners.= Sometimes driven below. In some designs the rollers revolve, and in others the pan revolves and the roller shaft is stationary.

=253. Lucop’s patent centrifugal pulveriser.=

=254. Carr’s patent disintegrator.= In this machine, each ring of bars is driven at a high speed in opposite directions inside a casing, the material being broken by the rapidity and intensity of the blows it receives.

=255. Horizontal centrifugal roller mill.= The material is crushed between the rollers and the shrouding of the pan by the centrifugal force of the rollers, which are suspended from a crosshead.

=256. Cone roller mill,= with vertical spindle.

=257. Cone roller mill,= with horizontal spindle and conical pan.

=258. Enclosed cone roller mill,= with horizontal spindle and spirally grooved roller and casing.

=259. Toothed sector mill.=

=260. Conical edge runner and pan.=

=261. Ordinary flour mill.= The material is fed in the centre, passes between the stones, and falls out into the outer casing.

=262. Rattle barrel,= for cleaning and burnishing articles by mutual attrition; sand or emery is sometimes used to assist the process.

=263. Ball and pan mill,= for crushing ores, &c. The balls are carried round by a cross arm fixed to the central spindle.

=264. Inclined ball and pan mill.=

=265. Oscillating mill.=

=266. Drum and roller revolving mill.=

=267. Cradle and roller mill.=

=268. Cone disc mill;= the cones being inclined axially to one another, the material is crushed at the lower side of the cones.

=269. Another form of stone breaker= with toggle motion.

=270. Horizontal cone plate mill.=

=271. Revolving stamp and pan mill for ores.=

=272. Vertical cone mill.=

=273. Revolving pan and ball mill.=

=274. Planishing discs= for accurately rounding iron bars. See the patent rolled shafting in use, manufactured by the Kirkstall Forge Co. and others.

=275. Vertical cone grinding and crushing mill.= The vertical shaft has an eccentric motion at the footstep, giving a swaying rotatory motion to the grinding cone.

=276. Crushing rollers= with spring bearing.