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1. Carr’s disintegrator

2. • Carr’s disintegrator (also known as Stedman in the U.S.;
Hubner, continental Europe) was a 19th
-century “toothed
crusher” or pulverizer invented by Thomas Carr of
Montpelier, Bristol, England, and patented in Great Britain in
1859.[1] It used to the best advantage the energy which was
transmitted to it, which explained its extraordinarily high
output compared with some of the other disintegrators.[2]
Carr’s disintegrator was the best-known of its era.

3. • Several different models were built according to the desired
outcome.[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.

4. • The velocity of the peripheral row of beaters was about 150
feet (46 m) per second, at which velocity at least 50 per cent.
Of the power was consumed in churning the air within the
casing, and overcoming the friction of the machine.
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

5. • Carr received Letter Patent in 1873 for the invention of
“Improvements in Disintegrators”. The main object of this
invention was to arrange and construct his Patent
disintegrator (No. 778, 29 March 1859, also No.3235, 22
October 1868) so that its set of cages that rotate in one
direction may by simple means be readily separated from
those that rotate the reverse way whenever the bars or
cages require to be conveniently got at for cleaning or
repairing