In- PROVEMENTS IN MACHINERY FOR MANUFACTURING SEMOLINA AND FLOUR, AND IN APPARATUS FOR PRODUCING PORTIONS OF SUCH MACHINERY
Year: 1869

page_text: PROVISIONAL SPECIFICATION left by John James Bagshawe and
William Fothergill Batho at the Office of the Commissioners of
Patents, with their Petition, on the 4th February 1869.
We, JOHN JAMES BAGSHAWE, of Thames Steel Works, Sheffield, Steel
Manufacturer, and WILLIAM FOTHERGILL BATHO, of Birmingham,
Engineer, do hereby declare the nature of the said Invention for "In-
PROVEMENTS IN MACHINERY FOR MANUFACTURING SEMOLINA AND FLOUR, AND IN
APPARATUS FOR PRODUCING PORTIONS OF SUCH MACHINERY," to be as follows:-
Our Invention consists, firstly, in the employment of certain novel
forms and arrangements of rollers for grinding or reducing wheat to
semolina or flour. We construct rolls of a corrugated or wavy longi-
tudinal section, so that at different points in their axial line they will
be of different diameters, the corrugated or wavy surface of the rolls
being grooved or toothed in any convenient manner for acting upon the
grain or semolina.
Secondly. We use grooved or fluted rolls in pairs of unequal diameter
driven at equal angular velocities, thus causing a different surface
velocity and more effectually operating upon the grain and semolina.

page_text: Thirdly. For manufacturing rolls of iron and steel we take a forging
of iron suitable for the body and axle of a roller, the ends of the said
forging being reduced to form a journal or bearing, and we heat the iron
roll or forging in a bath of molten lead, or by other suitable means, to a
proper temperature; we then place it in an iron or other mould, one
bearing of the said roller resting in a recess at the bottom of the said
mould to keep the forging in a central position therein; we then pour
into the annular space around the body of the said forging molten cast
steel, and afterwards forge the composite mass of metal thus produced
to the form of the roller required, to be afterwards turned or otherwise
shaped to the requisite conformation of the exterior surface.
Fourthly. In certain novel means of fluting or grooving rolls for
making semolina and flour. Within a suitable cast-iron framework we
place ten or other number of tool boxes arranged concentrically in
radial lines, each tool box holding a tool of one or more teeth acting simul-
taneously upon as many different points on the circumference of the
roller to be fluted or grooved. These tool boxes are attached to a disc
or table, to which a rotary motion may be given if a spiral form of tooth
or groove is required. The roller is held firmly between suitable centres
in a portion of the apparatus to which reciprocating motion is imparted,
by which means the roller is traversed lengthwise against the tools, thus
forming the teeth or grooves of the required size, and for fluting or
grooving the corrugated rolls we use circular cutters, which are made
to operate on the corrugations either in a parallel line or at any required
angle with the centre of the said rollers. The cutters are fixed to
revolve in suitable bearings, the said bearings remaining stationary, and
the roller being also fixed in suitable bearings has motions imparted
thereto, either in a direction parallel to its axis or at a right or other
angle thereto, and also a rotary motion is imparted thereto to suit the
pitch of the corrugations of the roller.
Fifthly. Our Invention consists in a novel arrangement of separating
apparatus in combination with any arrangement of rolls for making
semolina or flour. Where the said rolls are employed in a series of pairs
to act successively upon the grain between each successive pair of rolls
we place a series of separators formed of silk or wire, by which the whole
of the ground products are separated into varying grades of fineness in
⚫ a granulated state, and by suitable traversing conductors each grade or
portion of the substance thus separated is, according to its fineness, at

page_text: once passed to that particular pair of rolls the action of which it requires.
By this means any portion of the substance passing from one pair of
rolls and sufficiently reduced not to require the action of the next
succeeding pair or pairs is passed directly to that pair of rolls in the
series the action of which it does require to further reduce the size of
the grain or to finish it into flour.