IMPROVEMENTS IN APPARATUS FOR GRINDING CORN AND OTHER SUBSTANCES
Year: 1876

page_text: LETTERS PATENT to Robert Stirling Newall, of Ferndene, Gateshead, in the
County of Durham, for the Invention of "IMPROVEMENTS IN APPARATUS FOR
GRINDING CORN AND OTHER SUBSTANCES."
Sealed the 5th January 1877, and dated the 16th September 1876.
PROVISIONAL SPECIFICATION left by the said Robert Stirling Newall at the
Office of the Commissioners of Patents on the 16th September 1876.
ROBERT STIRLING NEWALL, of Ferndene, Gateshead, in the County of Durham.
"IMPROVEMENTS IN APPARATUS FOR GRINDING CORN AND OTHER SUBSTANCES."
This Invention has for its object the simplification of the apparatus and its ready
adjustment for fine or coarse grinding.
The apparatus consists of a horizontal shaft working in bearings on a framework
On the shaft is fixed or cast a ball of steel or other suitable material; at right
angles to this is a vertical shaft which is hollow, and it also works in bearings on
the framework; it has fixed at its lower end an inverted cup of similar material to
the ball, the upper surface of which it envelopes. The two shafts are geared
together, so that when motion is given to the ball the cup will revolve at right
angles to it; the distance between the surfaces of the cup and ball is adjusted by
means of a lever which moves the hollow spindle up or down, and thus increases or
diminishes the distance between them. The lever is weighted, and the extent of its
movement is regulated by a screw with a nut below and another above it. The
surface of the cup or ball may be grooved.
The material to be ground is put into a hopper placed above the hollow shaft,
down which it falls into the space between the cup and ball, and is there ground to
the required fineness by the rotation of the cup and ball.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Stirling Newall in the Great Seal Patent Office on the
16th March 1877.
"
ROBERT STIRLING NEWALL, of Ferndene, Gateshead, in the County of Durham.
IMPROVEMENTS IN APPARATUS FOR GRINDING CORN AND OTHER SUBSTANCES."
[Price 4d]

page_text: This Invention has for its object the simplification of grinding apparatus and its
ready adjustment for fine or coarse grinding.
The apparatus consists of a horizontal shaft working in bearings on a framework.
On the shaft is fixed or cast a ball of steel or other suitable material; at right
angles to this is a vertical shaft which is hollow, and it also works in bearings on
the framework; it has fixed at its lower end an inverted cup of similar material to
the ball the upper surface of which it envelopes. The two shafts are geared
together, so that when motion is given to the ball the cup will revolve at right
angles to it; the distance between the surfaces of the cup and ball is adjusted by
means of a lever which moves the hollow spindle up or down, and thus increases or
diminishes the distance between them. The lever is weighted, and the extent of its
movement is regulated by a screw with a nut below and another above it. The
surface of the cup or ball may be grooved.
The material to be ground is put into a hopper placed above the hollow shaft,
down which it falls into the space between the cup and ball, and is there ground to
the required fineness by the rotation of the cup and ball.
In order that my said Invention may be most fully understood and readily carried
into effect, I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is an elevation and Figure 2 is a vertical section of a mill or grinding
apparatus constructed according to my Invention.
a is the framework of the machine; b, b, is the horizontal shaft; c, c, the bearings;
d is the ball; e is the cup, with its shaft working in bearings ff; g and h are
wheels gearing the two shafts, the cup shaft being so arranged that it slides up or
down through the nave of the wheel, which is maintained in its position between
the two bearings f. f. The distance between the cup and ball is adjusted by the
lever and scrow k. The hopper has a means of adjustment by a screw and valve,
so as to regulate the quantity of material to be ground. The ground material falls
into a receptacle placed below the boxing m. There is a brusli on the end of the
lever n which keeps the ball cleared of any adhering material; if the ball is
grooved I recommend that the grooves should form as it were parallels of longitude
on a globe, and the grooves in the cup should be at right angles to its axis.
Motion is given to the machine by belts or otherwise. The speed of the cup and
ball may be varied by altering the proportion of the gearing wheels.
Having thus described the nature of my said Invention, and the manner of
performing the same, I would have it understood that I do not confine myself to
the exact details described, but I claim as my Invention the construction of mills
or grinding apparatus by the combination of a cup and a ball, arranged substantially
as described.
In witness whereof, I, the said Robert Stirling Newall, have hereunto set
my hand and seal, this Thirteenth day of March, in the year of our Lord
Que thousand eight hundred and seventy-seven.
R. S. NEWALL. (L.S.)