Year: 1887

page_text: Date of Application, 10th Feb., 1887
Complete Left, 10th Nov., 1887
Complete Accepted, 13th Dec., 1887
I, FRANK KNIGHT WOODROFFE, of Rugeley, in the county of Stafford, Mechanical
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in mills or machines for grinding and
crushing or kibbling all kinds of corn and grain, the object of the improvements being
to simplify the construction of such machines, to increase their durability and to
improve their action.
În carrying out my invention I employ a drum or cylinder having suitable grooves
or corrugations on its periphery and mounted on a shaft or spindle running horizon-
tally in suitable bearings. I also employ a concave or curved breast-plate having
grooves or corrugations on its concave side. This concave or curved breast-plate is
hinged or pivotted at its upper end and held against the periphery of the drum or
cylinder by suitable adjustable weighted levers at its lower end in combination with a
screw working in a nut whereby the position of the lower end of the breast-plate can
be regulated in relation to the cylinder; the breast plate is divided transversely to its
length into two or more parts, these parts being held together by bolts or their
equivalent and so arranged that any part may be readily renewed when worn
by use.
The centres on which the concave or curved breast-plate is hinged or pivotted at
its upper end are made adjustable so as to allow this portion of the breast-plate to be
brought nearer to or drawn further from the face of the drum or cylinder to suit the
nature of the grain to be operated on. The corn or grain is introduced between the
drum or cylinder and the concave or curved breast-plate by means of a shoe or feeding-
hopper hinged at one end and having a vibratory or oscillating movement communi-
cated to it by suitable cams or eccentrics carried on the spindle or shaft on which the
drum is mounted.
DLL 101 1
AT
G. F. REDFERN,
4, South Street, Finsbury, London,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Mills for Grinding and Crushing or Kibbling
Grain.
I, FRANK KNIGHT WOODROFFE, of Rugeley, in the county of Stafford, Mechanical
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
This invention relates to improvements in mills or machines chiefly designed for
grinding and crushing or kibbling all kinds of corn and grain, the objects of the
improvements being to simplify the construction of such machines, to increase their
durability, and to improve their action.
In carrying out my invention I employ a drum or cylinder having suitable grooves
or corrugations on its periphery and mounted on a shaft or spindle running horizon-
tally in suitable hearings.
I also employ a concave or curved breast-plate having grooves or corrugations on
its concave side. This concave or curved breast-plate is hinged or pivotted at its
upper end and held against the periphery of the drum or cylinder by suitable adjust-
able weighted levers at its lower end in combination with a screw working in a nut,
whereby the position of the lower end of the breast-plate can be regulated in relation
to the cylinder. The breast plate is divided transversely to its length, into two or
more parts, these parts being held together by bolts or their equivalent and so arranged
that any part may be readily renewed when worn by use.
The centres on which the concave or curved breast-plate is hinged or pivotted at its
upper end are made adjustable so as to allow this portion of the breast-plate to be
brought nearer to or drawn further from the face of the drum or cylinder to suit the
nature of the grain to he operated on. The corn or grain is introduced between the
drum or cylinder and the concave or curved breast-plate by means of a shoe or feeding-
hopper, hinged at one end and having a vibratory or oscillating movement communi-
cated to it by suitable cams or eccentrics carried on the spindle or shaft on which the
drum is mounted.
In order that ny said invention may be fully understood I will describe the same
with reference to the accompanying drawing which shows a sectional side elevation of
my improved grinding mill."
a is the frame of the machine and is the cyclinder or drum mounted on the shaft e
supported in bearings d on the said frame, and having suitable teeth or corrugations
on its periphery.
e is a semi-circular breast-plate also having teeth or corrugations on its concave
face, and hereinafter called the concave. This concave is pivoted on a centre f.
is a feeding hopper or shoe working on a fixed centre or pivot h. The grain or
other substance to be treated is conducted into the feeding hopper or shoe by the
spout i. In order that the said hopper shall project an even and regular supply of
material into the opening between the cylinder or drum b, and the concave e, a

page_text: vibratory movement is communicated to the said feeding hopper or shoe by means of
the eccentrick, mounted on the shaft c carrying the cylinder or drum, and the
eccentric rod or stalk which has a strap embracing the eccentric.
The upper
end of the eccentric rod or stalk is screw-threaded and passes through a lug or
projection on the side of the feeding hopper or shoe g.
In order to regulate the inclination or pitch of the feeding hopper or shoe g, the
screw-threaded end of the eccentric rod or stalk / carries an internally-threaded bush
or nut m which allows the adjustment to be made. A catch or stop which projects
beneath the hopper is provided to partially or entirely throw the said hopper or shoe
out of action by holding it at the extreme point of its upward throw.
The concave e is divided transversely of its length into two or more sections n, n²,
these sections having flanges or lugs o or their equivalents, whereby the said sections
may be securely united by bolts, screws or such like means. The lower portion n¹ of
this concave being that which has its teeth or corrugations most quickly worn, can by
this construction be readily adjusted, relatively to the face of the drum or cylinder b,
or if necessary replaced at a small cost.
In order to allow of different kinds of grain or other substances being efficiently
treated, the pivot f on which the upper end of the concave is centred is made
adjustable relatively to the drum or cylinder b so as to increase or diminish the
opening and to enable the pitch of the teeth or corrugations of the concave
relatively to the teeth or corrugations of the drum or cylinder to be regulated.
The lower end of the concave is held up to the face of the drum or cylinder by
the pressure of the weight pacting through the lever 7 which turns on the pivot as
a fulcrum, and the rods which is screw-threaded at one end.
The end of the lever has a bush or nut having an internal screw-thread adapted
to receive the screw-threaded end of the rods and is rotated by the hand-wheel u.
The rod s is jointed at one end to the concave. By turning the wheel u the rod s can
be adjusted relatively to the lever, so that the weight on the latter will cause the
concave to bear with more or less force towards the cylinder.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
1. In a grinding mill of the kind hereinbefore mentioned, the employment of an
eccentric on the main shaft for effecting the movement of the feeding hopper or shoe,
substantially as described.
2. In a mill having a drum or cylinder and a curved breast plate or concave, means
for adjusting both ends of the latter relatively to the drum or cylinder, substantially
as described.
3. In a mill having a drum or cylinder and a curved breast plate or concave, the
construction of the said breast plate or concave in two or more parts held together by
bolts or their equivalent so as to allow of an easy adjustment or replacement of any
part without interference with its fellows, substantially as herein before described.
4. The improved grinding mill consisting of the parts constructed and combined
substantially as hereinbefore described with reference the accompanying
drawing.
to
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.