IMPROVEMENTS IN MACHINERY FOR GRINDING, GRANULATING, OR CRUSHING GRAIN AND OTHER GRANULAR SUBSTANCES, AND FOR DRESSING OR TREATING THE MEAL OR MATERIAL PRODUCED THEREFROM."
Year: 1881

page_text: LETTERS PATENT to Heinrich Seck, of Frankfort-on-the-Main, in the German
Empire, but at present of No. 28, Southampton Buildings, Chancery Lane, in
the County of Middlesex, for an Invention of "IMPROVEMENTS IN MACHINERY
FOR GRINDING, GRANULATING, OR CRUSHING GRAIN AND OTHER GRANULAR
SUBSTANCES, AND FOR DRESSING OR TREATING THE MEAL OR MATERIAL
PRODUCED THEREFROM."
PROVISIONAL SPECIFICATION left by the said Heinrich Seck at the Office
of the Commissioners of Patents on the 26th April 1881.
HEINRICH SECK, of Frankfort on the Main, in the German Empire, but at
present of No. 28, Southampton Buildings, Chancery Lane, in the County of
Middlesex. "IMPROVEMENTS IN MACHINERY FOR GRINDING, GRANULATING, OR
CRUSHING GRAIN AND OTHER GRANULAR SUBSTANCES, AND FOR DRESSING OR
TREATING THE MEAL OR MATERIAL PRODUCED THEREFROM."
My Invention relates to that description of machinery for grinding, granulating,
or crushing grain and other granular substances in which the grain or other
material is passed between crushing rollers, one or both of which has its axis
mounted on a lever or arm capable of adjustment, whereby the said roller can be
moved nearer to or farther from the second roller, so as to regulate the degree of
fineness to which the grain or other material is crushed or ground thereby.
Machinery of this description was described in a Patent granted to F. Wirth (being
a communication to him from me) on the 13th October 1880, No. 4169. In such
machinery it has been customary to effect the pressure of the said rollers through
the intervention of springs, on end of which was caused to bear against a fixed
abuttment, while the other end pressed against the end of the lever, so that on
the position of this latter being adjusted by means of a screw spindle the spring
was more or less compressed, and thus the pressure exercised by the rollers was
made to vary considerably according to the degree of adjustment.
D

page_text: According to one part of my present Invention I obviate this disadvantage by
so arranging the adjusting mechanism that the rollers can be moved nearer to and
farther from each other without, varying the pressure of the spring, while at the
same time the power of the latter can be adjusted independently of the adjustment
of the rollers. For this purpose in the arrangement which I prefer to employ the
screw spindle, by means of which the lever is adjusted, passes freely through a
hole in the same, but has a collar, which is made to bear against one side face of
the lever for moving its roller away from the other roller. The end of the spindle
passing through the lever is extended some distance beyond it, and has at its end a
screw nut, between which and the other side face of the lever is placed a helical
spring. Thus for adjusting the rollers from each other the screw spindle is made
to press with its collar against the one side of the lever, as described, while for
adjusting them towards each other the screw spindle acts upon the other side of the
lever through the intervention of the spring, the pressure of which will however
not vary inasmuch as such adjustment would only be continued until the rollers
came into actual contact, after which if any increase of the power with which the
rollers are held in that position were required, this would be effected by the adjust-
ment of the pressure of the spring by means of the before mentioned screw nut.
This adjustment of the spring can of course also be effected at any other position
of the rollers when more or less removed from each other, the effect being that the
roller will only yield when owing to an excess of material or to some hard body
passing between the rollers, the pressure would exceed that to wliich the spring
was adjusted.
It will be readily understood that the converse of the above arrangement might
be employed, that is to say, the spring be made to act in tension instead of com-
pression, for which purpose it would be situated on the same side of the lever as
the collar on the screw spindle.
In the Specification to the before mentioned Patent, No. 4169 of 1880, was
described a combined arrangement of several sets of crushing rollers, such as are
above referred to with several sets of centrifugal dressing, or screening, or sorting
apparatus and centrifugal feed apparatus, whereby after the grain or other material
had passed through one pair of crushing rollers it was delivered into the centrifugal
dressing apparatus, and thence into a centrifugal feed apparatus which delivered
the material into a second set of crushing rollers, and so on.
Another part of my present Invention relates to an improved arrangement of
such combined machinery whereby the use of elevators for conveying the material
operated upon from one set of grinding and dressing mechanism to another, such as
was necessary in the said former arrangement, are dispensed with, and wherein the
driving mechanism is simplified. For this purpose I arrange the machine as
follows: At the top of the framing is arranged the first pair of crushing rollers,
which receive the grain or material from the feed hopper with regulating roller.
The crushing rollers being arranged horizontally side by side, the material is
delivered by them directly into a feeding worm or screw situated immediately.
beneath them, which screw feeds the material into the one end of a centrifugal
dressing apparatus similar in construction to those described in the said former
Specification. From the other end of this apparatus the material is delivered into
a centrifugal feed apparatus, also similar in construction to those described in the
said Patent, which delivers the material into a second set of crushing rollers
situated to one side of, but at a lower level than the first set of rollers, and also. at
the opposite end of the framing. From this second set the material is again
delivered directly into a feeding worm beneath them, which feeds it into the one
end of a second centrifugal dressing apparatus, through which the material passes in
a direction the contrary of that in the first dressing apparatus, and from the other
end of which it is delivered into a second centrifugal feed apparatus which delivers
it into a third set of grinding rollers situated beneath the first set, at the same end
of the framing. From these rollers the material falls into a worm below, which

page_text: conveys it out of the machine to wherever required. The fine meal or material
separated by the dressing machines is also conveyed by transporting screws from
the casings of these into shoots or receptacles.
The motion is imparted to the various parts as follows:-One roller of each pair
is driven by a strap from a motor engine or mill shaft and imparts a slower motion
to the other roller by means of a small toothed wheel on the axis of the former,
gearing with a larger wheel on that of the latter. This spur wheel gears also with
a pinion on the axis of the feed worm to these rollers, which axis is in one with
that of the beaters of the dressing apparatus, into which it delivers, and also
with that of the centrifugal feed apparatus, so that these all receive the necessary
motion from the second crushing roller, while the screening drum of the dressing
apparatus receives its slow rotary motion in the contrary direction to the beaters
from a pinion on the axis of the first named crushing roller gearing with a toothed
ring on the said drum.

page_text: .
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Heinrich Seck in the Great Scal Patent Office on the 24th
October 1881.
HEINRICH SECK, of Frankfort on the Main, in the German Empire, but at
present of No. 28, Southampton Buildings, Chancery Lane, in the County of
Middlesex. "IMPROVEMENTS IN MACHINERY FOR GRINDING, GRANULATING, OR
CRUSHING GRAIN AND OTHER GRANULAR SUBSTANCES, AND FOR DRESSING OR
TREATING THE MEAL OR MATERIAL PRODUCED THEREFROM."
My Invention relates to that description of machinery for grinding, granulating,
or crushing grain and other granular substances in which the grain or other
material is passed between crushing rollers, one or both of which has its axis
mounted on a lever or arm capable of adjustment, whereby the said roller can be
moved nearer to or farther from the second roller, so as to regulate the degree of
fineness to which the grain or material is crushed or ground thereby. Machinery
of this description was described in a Patent granted to F. Wirth (being a com-
munication to him from me) on the 13th October 1880, No. 4169.
machinery it has been customary to effect the pressure of the said rollers through
the intervention of springs, one end of which was caused to bear against a fixed
abuttment, while the other end pressed against the end of the lever, so that on the
position of this latter being adjusted by means of a screw spindle, the spring was
more or less compressed, and thus the pressure exercised by the rollers was made
to vary considerably according to the degree of adjustment.
In such
According to my present Invention I obviate this disadvantage by so arranging
the adjusting mechanism that the rollers can be moved nearer to and farther
from each other without varying the pressure of the spring, while at the same
time the power of the latter can be adjusted independently of the adjustment
of the rollers. For this purpose in the arrangement which I prefer to employ,
the screw spindle by means of which the lever is adjusted passes freely through
a hole in the same, but has a collar which is made to bear against one side face
of the lever for moving its roller away from the other roller. The end of the
spindle passing through the lever is extended some distance beyond it, and has
at its end a screw nut between which and the other side face of the lever is
placed a helical spring. Thus for adjusting the rollers from each other the screw
spindle is made to press with its collar against the one side of the lever, as
described, while for adjusting them towards each other the screw spindle acts
upon the other side of the lever through the intervention of the spring, the
pressure of which will however not vary, inasmuch as such adjustment would
only be continued until the rollers came into actual contact, after which if any
increase of the power with which the rollers are held in that position were
required, this would be effected by the adjustment of the pressure of the spring
of the before mentioned screw nut. This adjustment of the spring can of course
also be effected at any other position of the rollers when more or less removed
from each other, the effect being that the roller will only yield when owing to an
excess of material or some hard body passing between the rollers the pressure
would exceed that to which the spring was adjusted.
It will be readily understood that the converse of the above arrangement might
be employed, that is to say, the spring be made to act in tension instead of
compression, for which purpose it would be situated on the same side of the lever
as the collar on the screw spindle.

page_text: applied thereto; Figs. 2, 4, and 5 shew cross sections of the mill taken respectively
at W, X, and Y, Fig. 1; Fig. 3 shews an end view, and Fig. 6 shews a sectional
plan on line Z, Z, Fig. 2; Figs. 7 and 8 shew respectively a front and end view to
an enlarged scale of the improved lever adjustment.
The general construction and mode of operation of the mill is the same as that
described in the Specification to the above mentioned Patent, No. 4169 of 1880,
and need not be further referred to. The one grinding or crushing roller A of each
pair is mounted on the ends of levers B pivotted at C to brackets D on the
framing E, and formed with an eye at their other end through which passes
loosely the screw spindle F, having a collar F1 against which the lever is pressed
by the helical spring G, bearing with its other end against a washer and adjusting
screw nuts H on the outer end of the spindle F. The inner end of this spindle
screws through the wheel nut I held between the jaws of the bracket K, and
gearing with the teeth of the two nuts are worms L, L, on a spindle L' carried in
pivotting bearings M, and rotated by the hand wheel N. From this arrangement
it will be seen that the roller A is adjusted nearer to or farther from the roller A¹,
within the limits of actual contact quite independently of the action of the spring G,
by rotating the nuts I in one direction or the other by the spindle L', while on the
other hand the pressure of the spring can be adjusted by means of the nuts H,
irrespective of the said adjustment of the rollers A, A². The worm spindle L¹
is so arranged that the one nut I can be rotated thereby independently of the
other, so as to allow of accurate adjustment of the rollers in their axial direction.
It will be evident that the above described adjusting mechanism may be applied
at any convenient point of the levers or arms carrying the roller, which need not
necessarily be two-armed levers, and also that the adjusting spindles may be moved
by eccentrics, cams, or other known devices instead of by a screw and nut, as
described.
Having thus described the nature of my Invention and in what manner the
same is to be performed, I claim in respect of roller mills of the kind herein
referred to,
First. Arranging the levers carrying the crushing or grinding rollers, in
combination with adjusting spindles and springs pressing the levers against stops
thereon, in such manner that the spindles adjust the position of the levers and
roller independently of the action of the springs, the tension of which is also
adjusted independently of the position of the rollers, substantially as herein
described.
Second. The combination of the lever B, screw spindle E, collar F, spring G,
nut H, and wheel nut I, arranged and operating as herein set forth.
In witness whereof, I, the said Heinrich Seck, have hereunto set my hand
and seal, this First day of October, in the year of our Lord One thousand
eight hundred and eighty-one.
HEINRICH SECK. (L.S.)