Knight's Mechanical Encyclopedia, W., White-lead mill.

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19th-Century American

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White-lead mill.

A mill for grinding whitelead, either in a dry or moist condition.

White-lead mill.

Fig. 7209 illustrates an apparatus invented by Mm. Hameline and Besancon, in which the production of flying dust, injurious to the health of the workmen, is reduced to a minimum. The dried cakes of lead are placed in a hopper a, from whence they fall upon an endless band b within the chamber c, by which they are carried to the mill d, where they are pulverized. The powder falls upon a sieve, over which is a series of brushes connected to and revolving with the mill-spindle. The larger particles are conveyed off through a channel e, while those which pass through the meshes fall on to a second sieve with brushes, the larger particles, as before, being discharged through a channel e′ at the side, while the finer ones pass through and fall upon an incline, by which they are conducted into a vessel f, which may contain oil, or where they may be collected in the dry state. The chamber c has at its upper part a pipe g opening into the shaft h, which carries off such dust as is not condensed by means of steam-jets i entering the chamber.

Fig. 7210 illustrates a mill for grinding white-lead in oil or water. The pigment having been sufficiently moistened and mixed is fed through the hopper at the top, and is thoroughly comminuted and incorporated with the oil by the grinding action of two grooved disks, the upper one of which is rotated by gearing driven by belt and pulley and the lower one stationary. The spindle of the upper disk is stepped in a lever which is adjustable by a screw-rod and hand-wheel to vary the distance between the faces of the two disks, so as to regulate the fineness of the product.

White-lead mill.

1877.

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Knight's Mechanical Encyclopedia
Knight, Ed.

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White-lead mill.

Knight's Mechanical Encyclopedia Knight, Ed.

This text is part of:

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Table of Contents:

White-lead mill.

Knight's Mechanical Encyclopedia
Knight, Ed.