IM- PROVEMENTS IN APPARATUS FOR SIFTING PORTLAND CEMENT AND LIKE MATERIALS
Year: 1880

page_text: LETTERS PATENT to Samuel Mayell, of the Manor Works, Halling, near
Rochester, in the County of Kent, Foreman, for an Invention of
"IM-
PROVEMENTS IN APPARATUS FOR SIFTING PORTLAND CEMENT AND LIKE
MATERIALS."
PROVISIONAL SPECIFICATION left by the said Samuel Mayell at the Office
of the Commissioners of Patents on the 11th November 1880.
"
SAMUEL MAYELL, of the Manor Works, Halling, near Rochester, in the County
of Kent, Foreman. "IMPROVEMENTS IN APPARATUS FOR SIFTING PORTLAND
CEMENT AND LIKE MATERIALS."
This Invention has for its object improvements in apparatus for sifting Portland
cement and like materials.
The apparatus which I arrange and employ for this purpose consists of a bed
plate and an upper plate, connected by columns at their four corners. These plates
carry the bearings of four vertical axes which are adjacent to the columns, each to
each. Each vertical axis has a pinion fixed upon it at its upper end, and these
pinions all gear into one central spur wheel. Above the upper plate of the frame
two standards are fixed to carry the bearings of an horizontal shaft having a belt
pulley upon it, and which is driven by a belt receiving motion from any convenient
motor. This horizontal shaft has also a bevilled wheel fixed upon it, and drives
another bovilled wheel on the upper end of the upright axis of the central spur
wheel with which the four spur pinions gear as already mentioned, and by which
they are driven.
The sieves or sifting surfaces are of wire gauze, and they are carried by a frame
or box like structure open at the top. The sieve frame occupies the space between
the four upright axes, and it is carried by four suspension rods connected at their
upper ends with lugs on the columns. There are ball and socket joints at both ends
of the rolls, and adjusting screws and lock nuts at the lower ends. The axes are
cranked, and the cranks are embraced by bearings fixed to the sieve frame, so that
the rotation of the axes keeps the sieve frame in rapid movement. The sieve frame
Price RM1

page_text: extends out beyond the columns at either end of the machine, and here its width
is increased so that the frame has a form resembling the letter I
The wire gauze forming the sifting surface is in a number of separate squares,
and these are strained by screws passing through the sides and other parts of the
sieve frame. The screws enter bars to which the squares of gauze are fixed at their
edges.
The material to be sifted passes by a spout on to the sifting surfaces near to the
outer ends of the sieve frame; the finer parts pass through the wire gauze, and the
coarser move along its surface to an opening near the centre of the frame, and there
fall into an inclined trough and are conducted away. The fine material which
enters the sieve frame also escapes by an opening provided near the centre of the
frame, and is led away by an inclined spout.
A number of bearers are mounted on the sieve frame, and when the frame is in
motion they strike upon it, and so facilitate the passage of the fine material through
the wire gauze.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Samuel Mayell in the Great Seal Patent Office on the 11th May 1881.
SAMUEL MAYFLL, of the Manor Works, Halling, near Rochester, in the County
of Kent, Foreman. "IMPROVEMENTS IN APPARATUS FOR SIFTING PORTLAND
CEMENT AND LIKE MATERIALS."
This Invention has for its object improvements in apparatus for sifting Portland
cement and like materials.
The apparatus which I arrange and employ for this purpose consists of a bed
plate and an upper plate, connected by columns at their four corners.
These plates
carry the bearings of four vertical axes which are adjacent to tho columns, each to
each. Each vertical axis has a pinion fixed upon it at its upper end, and these
pinions all gear into one central spur wheel. Above the upper plate of the frame
two standards are fixed to carry the bearings of an horizontal shaft having a belt
pulley upon it, and which is driven by a belt receiving motion from any convenient
motor. This horizontal shaft has also a bevilled wheel fixed upon it, and drives
another bevelled wheel on the upper end of the upright axis of the central spur
wheel with which the four spur pinions gear as already mentioned, and by which
they are driven.
The sieves or sifting surfaces are of wire gauze, and they are carried by a frame
or box liko structure open at the top. The sieve frame occupies the space between
the four upright axes, and it is carried by four suspension rods connected at their
upper ends with lugs on the columns. There are ball and socket joints at both
ends of the rods, and adjusting screws and lock nuts at the lower ends. The axes
are cranked, and the cranks are embraced by bearings fixed to the sieve frame, so
that the rotation of the axes keeps the sieve frame in rapid movement. The sieve
frame extends out beyond the columns at either end of the machine, and here its
width is increased so that the frame has a form resembling the letter I.
The wire gauze forming the sifting surface is in a number of separate squares,
and these are strained by screws passing through the sides and other parts of the
sieve frame. The screws act upon bars to which the squares of gauze are fixed at
their edges.
The material to be sifted passes by a spout on to the sifting surfaces near to the
outer ends of the sieve frame. The finer parts pass through the wire gauze, and
the coarser move along its surface to an opening near the centre of the frame, and
there fall into an inclined trough and are conducted away. The fine material
which enters the sieve frame also escapes by an opening provided near the centre
of the frame, and is led away by an inclined spout.
A number of balls are mounted on the sieve frame, and when the frame is in
motion they strike upon it, and so facilitate the passage of the fine material
through the wire gauze.
Having thus described the nature of my Invention, I will proceed to describe
more fully the manner of performing the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 of the Drawings hereunto annexed shews a side elevation; and
Figure 2, an end elevation of apparatus constructed as above described. Figure 3
is a plan view of one half of the sieve frame and sieves carried by it; Figure 4 is
a vertical section of the same; and Figure 5, a similar section of part of same on a
larger scale.
A, A, is the frame composed of four columns connecting together top and bottom
plates; B, B, are four vertical axes, the bearings of which are carried by the
-

page_text: frame; C, C, are four pinions, one on each axis B.
These all gear into one central
spur wheel, on the axis of which is a bevil wheel D, which is driven by a
corresponding bevil wheel E on the horizontal driving shaft F; this shaft is
supported in bearings carried by standards G at the sides of the machine. H is
the sieve frame carried by four suspension rods I; this frame, as shown at Figure 3,
carries bearings J which embrace cranks on the crank shafts B. K, K, are the
several divisions of the wire gauze sifting surface; the divisions of wire gauze are
at their edges attached to bars L; these bars are, as shown at Figure 5, held to the
sieve frame by scrow bolts M, which also serve to strain the wire gauze. N, N,
are inclined shoots passing down from feed hoppers O to the several divisions of
each of the ends of the sieve frame.
As the sieve frame is agitated by the revolving of the crank axes B, the finer
parts of the material pass through the sieves and are received on to inclined
troughs P, and discharged to one side of the machine at its centre by a spout Q,
whilst the coarser parts pass over the sieve surface, and at the centre of the sieve
frame fall into an inclined trough R and are discharged on the opposite of the
machine by its spout S. T, T, are hollow boxes fixed at intervals to the sides of
the sieve frame. In each box is a ball U which when the sieve frame is in motion
strikes against the sieve frame and makes it vibrate, and thereby facilitates the
passage of the finer material through the wire gauze.
Having thus described the nature of my Invention, and the manner of performing
the same, I would have it understood that I claim, the combination of apparatus
for sifting Portland cement and like materials, substantially as herein before
described.
In witness whereof, I, the said Samuel Mayell, have hereunto set my hand
and seal, this Ninth day of May, in the year of our Lord One thousand