IMPROVEMENTS IN MACHINERY OR APPARATUS FOR GRINDING AND PULVERIZING MIDDLINGS,' WHEAT, AND OTHER GRAIN
Year: 1877

page_text: LETTERS PATENT to John Smith, of Carshalton, in the County of Surrey,
William Bleckly Dell, and John Fyfe Stewart, of the City of London, for the
Invention of "IMPROVEMENTS IN MACHINERY OR APPARATUS FOR GRINDING
AND PULVERIZING MIDDLINGS,' WHEAT, AND OTHER GRAIN."
Sealed the 23rd November 1877; and dated the 25th, May 1877.
PROVISIONAL SPECIFICATION left by the said John Smith, William Bleckly
Dell, and John Fyfe Stewart, at the Office of the Commissioners of Patents on
the 25th May 1877.
"
JOHN SMITH, of Carshalton, in the County of Surrey, and WILLIAM; BLECKLY
DELL, and JOHN FYFE STEWART, of the City of London.; "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR GRINDING AND PULVERIZING MIDDLINGS,'
WHEAT, AND OTHER GRAIN.".
or
}
This Invention relates to certain improvements in working the rolls or cones of
grinding or pulverizing machinery for grinding, pulverizing, or reducing "middlings,"
sharps," wheat, or other grain, and the Invention consists in giving to the
roll, or rolls, or cone, or cones, an endwise or backward and forward traversing
motion upon each other and in their bearings, in addition to the ordinary rotary
motion, so as to produce a greatly increased combined crushing and, frictional or
grinding action. The said endwise motion will be communicated to the shafts of
the rolls by cams or eccentrics, on a longitudinal shaft, said cam's working in con-
nection with a double collar on the shaft of one of the rolls or cones to give the
required traversing motion. A clear space of shaft will be left between the collar
at the end of the roll or cone shaft and the bearings; or a collar, or enlargement
on the roll or cone shaft will play in a recess in the bearing.
:

page_text: «
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Smith, William Bleckly Dell, and John Fyfe Stewart, in the
Great Seal Patent Office on the 24th November 1877.
JOHN SMITH, of Carshalton, in the County of Surrey, WILLIAM BLECKLY DELL,
and JOHN FYFE STEWART, of the City of London. "IMPROVEMENTS IN MACHINERY
OR APPARATUS FOR GRINDING AND PULVERIZING MIDDLINGS,' WHEAT, AND
OTHER GRAIN."
"
This Invention relates to certain improvements in working the rolls or cones
of grinding or pulverizing machinery for grinding, pulverizing, or reducing
middlings," or sharps," wheat, or other grain, and consists in giving to the roll
or rolls (or cone or cones) an end wise or backward and forward traversing motion
upon each other and in their bearings, in addition to the ordinary rotary motion,
so as to produce a greatly increased combined crushing and frictional or grinding
action, as well as preserving the rolls or cones true with each other. The said end-
wise motion will be communicated to the shafts of the rolls by cams or eccentrics
on a longitudinal shaft, said cams working in connection with a double collar on the
shaft of one of the rolls or cones to give the required traversing motion. A clear
space of shaft will be left between the collar at the end of the roll or cone shaft
and the bearings; or a collar, or enlargement in the roll or cone shaft will play in a
recess in the bearing.
An in order that our said Invention may be more fully understood we shall now
proceed more particularly to describe the same, and for that purpose shall refer to
the accompanying Drawing, like letters of reference indicating corresponding parts
in all the Figures.
Fig. 1 is a plan of a machine for grinding, pulverizing, or reducing "middlings," or
"sharps," wheat, constructed according to our Invention, and Fig. 2 an end view
thereof.
A, B, C, D, represent the rolls (or cones) of the machine mounted on their shafts,
1, 2, 3, 4, in suitable bearings on the upper part of the frames E and F, as shewn,
and caused to rotate by the driving wheel G and toothed spur wheel H, gearing into
spur wheel I, which gives motion to the spur wheels J, K, and L, as shewn, or they
may be driven in any other desirable or well-known manner. In addition to having
a rotary motion the rolls B and C are caused to reciprocate transversely or endwise
in their bearings by means of the cam or eccentric M, which is keyed or otherwise
fixed on a longitudinal shaft 5, mounted in suitable bearings N, which are secured
to the side of the frame F. This shaft 5 is driven by the worm wheel O, geared
into by the worm P, which is keyed, or the driving shaft 6 of the machine, and
rotates with it. The cam or eccentric M exactly fits and works in a circular hole
formed in a rectangular or other suitably shaped block Q, which reciprocates ver-
tically in the jaws a, a, forming the lower arm of a double lever R, which is pivoted
or hinged to the fulcrum S attached to the frame F. The upper arm of the lever R
passes through a hole in the centre (or otherwise) of a link T, the ends of which
are formed with eyes X, X, through which pass the ends respectively of the shafts
2 and 3, carrying the rollers B and C, the said eyes being confined thereat by collars
7 and 8 formed on or secured to the shafts 2 and 3 as shewn. The journals 9 and
10 of these shafts are made sufficiently long to allow of the necessary traverse to
the rollers B and C..
On the rotation of the driving shaft 6 the worm P acts upon the worm wheel O,
and through the shaft 5 upon the cam or eccentric M, which revolving in the block
Q causes the double lever R to vibrate, and the upper arm of the said lever acting
upon the link T, the latter gives a corresponding vibratory motion to shafts 2 and 3
in their journals 9 and 10, and to the rollers B, C, which consequently move to and
fro endwise during their rotation upon the rollers A, B, respectively, thereby pro-
ducing a greatly increased frictional grinding action upon the wheat or other grain

page_text: passing between them, and at the same time maintaining the rolls A, B, and C, D,
true with each other. By this means the wheat or grain which is supplied to the
rolls, either in the ordinary manner, or by a special arrangement of hopper and
feeding apparatus, is ground more thoroughly than heretofore.
In lieu of giving the end reciprocating movement to the rollers by the gearing
above described, it may be effected by any other arrangement of mechanism that
may be found most suitable.
Having now described and particularly ascertained the nature of our said
Invention, and the manner in which the same is or may be used or carried into
effect, we would observe in conclusion that what we consider novel and original,
and therefore claim as the Invention secured to us by the herein-before in part
recited Letters Patent is, in machines for grinding, pulverizing, or reducing
middlings," wheat, or other grain, giving to the rolls or cones an end wise recipro-
cating movement upon each other, in combination with their rotary movement,
substantially as and for the purpose herein-before described and illustrated by the
accompanying Drawing.
In witness whereof, we, the said John Smith and John Fyfe Stewart, for and
on behalf of ourselves and the said William Bleckly Dell, have hereunto set
our hands and seals, this Twenty-third day of November, One thousand
eight hundred and seventy-seven.
Witness,
E. T. HUGHES,
Patent Agent,
123, Chancery Lane,
London.
JOHN SMITH.
(L.S.)
JOHN FYFE STEWART. (L.S.)

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