Carr's disintegrator

[6] The machine was mostly used for the pulverising of such substances as superphosphates and other materials that would form pasty masses when subjected to pressure, or would clog the grooves of an ordinary mill.

It consisted of two or more circular discs studded with beaters revolving within a casing or box in opposite directions on the same line of shafting.

Originally introduced as a flour mill, its use was extended to many other substances, and various modifications in its construction were made, some of them of doubtful utility.

As each compartment was presented in turn to the aperture at the bottom of the hopper, it was filled with the grain or other substance to be pulverized or reduced; and as it continued to rotate, it carried the same round to the aperture on the top of the feed-pipe, into which its contents were discharged, while all air except that which was contained in the interstices of the grain or granules was effectually excluded.

[9] This Carr's disintegrator model consisted of two iron discs, each supported by a short length of horizontal shafting carried in suitable bearings and furnished with a driving pulley.

The two discs were caused to revolve at high velocities in opposite directions, the speed of the outer teeth being usually some 7,000 feet (2,100 m) per minute.

[3] This Carr's disintegrator model consisted essentially of two, four, six, or eight concentric cages, the cylindrical sides of which consisted of metallic bars b, encased on one side in plain discs a, on the other on crowns The first (inside), third, and fifth cages formed an aggregate of a single piece, screwed with the boss of the disc on to a driving shaft.

The machine was driven from the same shaft by means of two belts, one of which is straight and the other crossed, so that the cages formed by one of the elements of the drum fit into the annular spaces of the other and revolve in the opposite direction.

The substance issuing from the crusher fell into a side channel hollowed out of the foundation of the machine, from where it collected in the receiving vessel of an elevator, which removed it.

A product, consisting of granules of no matter what size, could be obtained by turning the drums at a greater or less speed and having a suitable distance between the bars.

It also rendered good service in making compound manures, provided that the ingredients possessed the same or but slightly different densities.

This machine seemed adapted to soft, earthy substances, like chalk, burnt gypsum or lime, and mineral manures.