IMPROVEMENTS IN CRUSHING MACHINERY ESPECIALLY SUITABLE FOR CRUSHING GRAIN
Year: 1878

page_text: LETTERS PATENT to Fitzroy Campbell Mahon, of the City of Manchester,
in the County of Lancaster, Merchant, for the Invention of "IMPROVEMENTS
IN CRUSHING MACHINERY ESPECIALLY SUITABLE FOR CRUSHING GRAIN." A
communication from abroad by Joseph Thomas Chandler Cove, of Amherst,
Cumberland County, Nova Scotia, Dominion of Canada.
PROVISIONAL SPECIFICATION left by the said Fitzroy Campbell Mahon at
the Office of the Commissioners of Patents on the 29th January 1878.
FITZROY CAMPBELL MAHON, of the City of Manchester, in the County of
Lancaster, Merchant. "IMPROVEMENTS IN CRUSHING MACHINERY ESPECIALLY
SUITABLE FOR CRUSHING GRAIN." (A communication from abroad by Joseph
Thomas Chandler Cove, of Amherst, Cumberland County, Nova Scotia, Dominion of
Canada.)
This Invention has for its object "Improvements in Crushing Machiney especially
Suitable for Crushing Grain," and has reference to the use in combination of a
revolving wheel having its outer periphery or circumference indented, grooved, or
corrugated, and a plate having a diagonally-grooved face, and arranged tangentially
or nearly tangentially to the said wheel.
The grain or substance to be operated upon is fed by a hopper and feed wheel;
and is mashed thoroughly and evenly by passing between the revolving wheel and
the plate, the latter by reason of its perpendicular position and rasp-like surface
reducing the friction to a minimum.
Gear wheels may be used when the machine is driven by hand power, or a small
pulley may be attached to the end of the main shaft when horse or steam power is
used.
The crushing or grinding wheel and plate are relatively adjustable to suit the
size and condition of the grain or substance to be crushed or mashed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Fitzroy Campbell Mahon in the Great Seal Patent Office on the
27th July 1878.
FITZROY CAMPBELL MAHON, of the City of Manchester, in the County of
Lancaster, Merchant. "IMPROVEMENTS IN CRUSHING MACHINERY ESPECIALLY
SUITABLE FOR CRUSHING GRAIN." A communication from abroad by Joseph
Thomas Chandler Cove, of Amherst, Cumberland County, Nova Scotia, Dominion of
Canada.
This Invention has for its object "Improvements in Crushing Machinery especially
Suitable for Crushing Grain," and has reference to the use in combination of a
revolving wheel having its outer periphery or circumference indented, grooved, or
corrugated, and a plate having a diagonally-grooved face, and arranged tangentially,
or nearly tangentially to the said wheel.
The grain or substance to be operated upon is fed by a hopper and feed wheel,
and is mashed thoroughly and evenly by passing between the revolving wheel and
the plate, the latter by reason of its perpendicular position and rasp-like surface
reducing the friction to a minimum.
Gear wheels may be used when the machine is driven by hand power, or a small
pulley may be attached to the end of the main shaft when horse or steam power
is used.
The crushing or grinding wheel and plate are relatively adjustable to suit the
size and condition of the grain or substance to be crushed or mashed.
But to make the Invention communicated to me better understood I will proceed
to describe the same by reference to the accompanying Drawing, in which,-
Figure 1 shews a perspective view of a machine constructed according to this
Invention.
Figure 2 is a side elevation shewing a side view of the grinding wheel and plate,
and the mode in which the edge or outer surface of the wheel is cut.
Figure 3 is a plan shewing the face of the grinding wheel and the plate.
Similar letters in all the Figures represent similar parts.
A is the grinding wheel, the outer surface of which is indented or grooved
similarly to the grinding face of an ordinary millstone; B is the plate with pecu-
liarly cut grooves forming sharp joints or corrugations, between which plate and
the face of the grinding wheel A the grain is mashed or ground; C is a feed wheel
(or an ordinary piece of square iron) revolving in the hopper which agitates the
grain, causing an even flow thereof when the machine is in motion, and is driven
by a small pulley D and belt D¹ from the main shaft; E and F are guards by which
the grain is prevented from escaping without being brought in contact with the
wheel and plate, as before described; it also serves the purpose of a frame to hold
the plate B in its place; G, G, G, main frame of the machine, which should be sub-
stantially built to resist the vibration of the wheel when in rapid motion; H is the
hopper, fitted with two slides in the bottom; the underneath one has a hole about
an inch and a half in diameter, and is used to regulate the feed (with large grain
especially) when driven by hand power. The top slide is a piece of plain wood or
metal, covering the entire bottom of the hopper, so as to completely shut off the
feed or regulate it as required; I is the main shaft, which passes through the centre
of the wheel A and rests on the main frame. On the end of the said shaft outside
the frame is attached a small gear, wheel L driven by a larger gear wheel L¹ to
which the handle is attached when driven by hand power. A pulley is used on
the end of the shaft marked K when the machine is driven by steam or other
power.
The wheel can be adjusted to the plate either by means of adjustable boxes, or
preferably by means of a set screw M, from behind which moves the plate B to the
wheel A, as shewn in side elevation, Figure 2, and in plan, Figure 3.

page_text: Having thus described the Invention communicated to me and the manner of
performing the same, what I claim is, the construction and employment of an
indented, grooved, or corrugated wheel, and a diagonally grooved or corrugated
plate placed in a vertical position and tangential or nearly tangential to the wheel,
arranged and operating substantially as and for the purposes herein-before described,
and represented in the accompanying Drawing.
In witness whereof, I, the said Fitzroy Campbell Mahon, have hereto set
my hand and seal, this Twenty-third day of July, in the year of our Lord
One thousand eight hundred and seventy-eight.
Witness,
G. F. REDFERN,
Patent Agent,
4, South St.,
Finsbury,
- London.
F. C. MAHON. (L.S.)