IMPROVEMENTS IN GRINDING MILLS
Year: 1859

page_text: PROVISIONAL SPECIFICATION left by William Edward Newton at the
Office of the Commissioners of Patents, with his Petition, on the 28th
July 1859. A communication from abroad by Joseph Cornelius Lyons
and James Schenck Wyckoff, of Sennet, County of Cayuga and State of
New York, in the United States of America.
I, WILLIAM EDWARD NEWTON, of the Office for Patents, 66, Chancery Lane,
in the County of Middlesex, Civil Engineer, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN GRINDING MILLS," to be as follows:-
This Invention of improvements in grinding mills consist, first, in a novel
arrangement of a clasp which is retained by a pin, and secured to a hand wheel
by a thumbscrew in such relation to the shaft of the mill and to the grinding
cone, that the shaft and grinding cone may be readily adjusted and firmly
secured, whether the machine is in operation or at rest.
Secondly, in arranging a double flanged pulley with a fork and rod in such
relation to the shaft of the mill and to the shell of the corn cracker that, by
the adjustment of the shaft and cone, the shell of the corn cracker will also be
adjusted, if both the grinding cone and the corn cracker are enclosed in the
same case, and mounted on the same shaft.
Thirdly, in a novel arrangement and combination of the grinding cone and
corn cracker, mounting the same on different shafts which are parallel to each
other, and which are connected by means of gear wheels in such a manner that
the grinding cone can be adjusted at pleasure in a longitudinal direction without
interfering with the operation of the cracker, and that the cracker can be

page_text: operated at any desirable speed, and independent from the cone, and the cone
independent from the cracker.
Fourthly, in a novel arrangement and mode of constructing the grinding
surfaces of the concave end of the grinding cone. The grinding surface of
the concaves which surround the grinding cone are fluted, but instead of con-
tinuing the flutes from one end to the other as is usual, two rows of flutes are
cut into the surface of the concave, one row commencing on the small end,
and extending to points a little over two-thirds of the entire length of the
concave, and the other row commencing on the large end, and terminating at
-points extending a little more than one-third of the entire length of the concave.
The two rows are so arranged that ridges are formed between each adjoining
pair of the points, so that the substance which is to be ground, and which
enters from the small end of the concave as it arrives at these ridges is exposed
to the action of the grinding cone with more advantage than with the ordinary
grinding surfaces. The grinding surface of the cone is arranged in a similar
manner; the flutes which commence on the small end of the cone terminate
at points extending a little less than two-thirds over the whole length of the
cone, and the flutes which commence on the large end of the cone extend
a little less than one-third over its whole length. The ridges formed
between the flutes terminate at points a little in advance of the points of the
opposite flutes, and the ridges formed between the flutes also terminate at
points a little beyond or in advance of the others in the opposite direction, thus
forming projecting corners, which serve to scatter that part of the substance
which may find its way into the flutes, and throwing the same up on the ridges
in the concave, where it is exposed to the influence of the ridges on the cone.
By combining these two grinding surfaces on the cone and on the concaves,
the substance to be ground is reduced to a uniform fineness, none of its parts
being allowed to pass through the flutes of the grinding surfaces without
being exposed to the influence of the ridges and cutting edges between these
flutes.