IMPROVEMENTS IN MACHINERY FOR CRUSHING, GRINDING, OR.PUL- VERIZING.
Year: 1876

page_text: PROVISIONAL SPECIFICATION left by Henry Sunderland at the Office of the
Commissioners of Patents on the 21st April 1876.
HENRY SUNDERLAND, of Handsworth, in the County of Stafford, Woollen
Draper. "IMPROVEMENTS IN MACHINERY FOR CRUSHING, GRINDING, OR.PUL-
VERIZING.
"
My said Invention consists in constructing and combining or arranging in the
manner herein-after described the parts of machinery for crushing, grinding, or
pulverizing.
I mount a strong roll upon a horizontal axis, the ends of the axis working in
strong fixed or slightly yielding bearings.
The figure of the roll may be truly cylindrical, or there may be parallel corruga-
tions on its cylindrical surface, either at right angles to the axis or parallel thereto.
Rotary motion is given to this roll through a pulley on one end of its axis, or by
any other gearing connecting the axis with a steam engine or other prime mover.
On one side of the roll is a strong fixed block, that face of the said block presented to.
the roll being concave, its curvature being of somewhat longer radius than the radius
of the roll. This block is fixed with its curved facc eccentric to the roll, its lowest
part being nearly in contact with the roll while its upper face is situated at a 'con-
siderable distance from it. This concave fixed surface may either be plain or
corrugated. Or instead of the fixed concave block described a rocking or moveable
block may be used. The said rocking or moveable block is connected to the fixed
base of the machine by means of an axis situated near the roll and at about the
same level as the lowest part of the roll. The said rocking block is for the most
part situated above the axis on which it turns, but also extends below the said axis.
The said rocking block tends to preserve its normal position by its own weight, but
is capable of yielding slightly by moving upon its axis when an excessive pressure
of the matter under treatment unduly strains the lower part of the block. Either
the fixed block or the moveable block may be made in one piece or of several similar
pieces situated closely side by side.
The matter to be crushed, ground, or pulverized is introduced between the fixed
surface and the roll, and by the rotation of the latter is carried forward between the
inclined surfaces of the rotating roll and the fixed or rocking block. The said
matter is thereby ground, crushed, or pulverized, and falls from the machine at the
under side of the roll.
D

page_text: Where the matter to be operated upon is in large pieces, and has to be reduced to
a fine powder, I prefer to operate upon it two or three times in order to produce.the
required degree of fineness. The roll and blocks are capable of adjustment, so as to
enable the machine to grind coarse or fine, but where a substance has to be reduced
to a very fine powder I prefer to employ two or three different machines set to
grind to different finenesses.
My Invention is particularly applicable to the crushing, grinding, and pulverizing
of mineral and other hard substances, but may also be applied to the crushing.
grinding, and pulverizing of other substances.