IMPROVEMENTS IN PULVERIZING MACHINES
Year: 1883

page_text: LETTERS PATENT to William Robert Lake, of the firm firm of Haseltine,
"
Lake, and Co, Patent Agents, Southampton Buildings London, for an Invention
of "IMPROVEMENTS IN PULVERIZING MACHINES communicated to him from
abroad by Ryerson Dudley Gutes of Chicago, Illinois, United States of
America, Mechanician
COMPLETE SPECIFICATION filed by the said William Robert Lake at the
Office of the Commissioners of Patents on the 9th October 1883.
"
WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co, Patent Agents
Southampton Buildings, London, " IMPROVEMENTS IN PULVERIZING MACHINES
communicated to me from abroad by Ryerson Dudley Gates, of Chicago, Illinois,
United States of America, Mechanician,
This invention relates to pulverizing machines.
The said invention comprises various novel and useful constructions and combi-
nations of parts whereby the pulverizing machine described in the specifications of
United States Patents dated June 27 1882. N° 260092, and December 19 1882
N° 269,404, is rendered more effective; and whereby greater convenience than
heretofore is afforded for repairing and adjusting it, and improved means are
provided for driving the screen, and pulverizing rollers, while the means for
connecting the parts are improved.
In the accompanying drawings
Figure 1 is a vertical transverse section on the line x¹, c¹ figure 2, of a machine
constructed according to this invention
Figure 2 is a vertical section on the line xx figure 1, some parts being shown
in elevation.
Figure 3 is a side view of the upper section, the removable side section, and one
of the lower sections to which the removable side section is bolted, and upon which
the other side section is applied by bolting it thereto, or casting it with said lower
section the said parts of the enclosing case or frame being shown as slightly
separated from one, another, the sills of the foundation support being indicated by
dotted lines.
Figure 4 is a detail side view of the lowest section of the enclosing frame or

page_text: outer case the revolving screen the interior hopper, the elevator buckets, and the
friction driving rollers of the screen; also a vertical cross sectional view of the pul-
verizing rollers and the tie and supporting rods. In this view the outer enclosing
frame or case, and the inner shells of the screen are supposed to be removed.
Figure 5 is a side elevation of the inner shells bolted together, and a vertical 5
transverse section of the journals of the pulverizing rollers.
Figure 6 is a central vertical section of the same
Figure 7 is a central vertical section of the revolving screen with the inner
shells removed.
Figure 8 illustrates an elevator bucket as it appears in front and end elevation
Figure 9 is a diagram showing the arrangement of the driving gearing and
revolving screen, the driving pulley and balance wheel being removed
1
Figure 10 is a sectional view drawn to an enlarged scale of a portion of the
screen, showing an elevating bucket, the two grooved ring plates of the screen
frame, a clamping rod, the grooved stay and agitating bar of the said frame, and 1
the wood tacking strips of the ring plates and bars.
Figure 11 is an edge view of the outer enclosing case or frame, and
Figure 12 is a similar view of the inner shells of the screen.
In the machine represented in the drawings, two sets or pairs of pulverizing
rollers G Gare employed the material passing directly from one set to the other
set through a hopper G³, and then dropping into the revolving elevator and
Bcreen H H.
'
The frame or outer case A, with its inner shells or plates B, B¹ is so constructed
that it can be easily taken apart to get to the pulverizing rollers G, G¹ and elevator
screen H H1, in case of repairs being necessary. The upper part a of the said case
or frame A is removable like a cover, being fastened by flanges and bolts u to the
intermediate flanged parts a¹ a*, which, in like manner are fastened to the flanged
part a in turned fastened by flanges and bolts al to the lowermost part a³, all in
the manner shown.
The plates B B¹ of the inner shell are constructed separately; each being formed
of two pieces with bolting flanges, so as to be bolted together after they are slipped
upon the journals of the pulverizing rollers as illustrated at U in figures 4, 5, 6,
and 12. These shells are fitted over the journals of the pulverizing rollers with
their respective pieces unbolted at U, and then the pieces are bolted together. One
of the shells B can be removed over the left-hand ends of the journals, after the
section a and the section a¹ of the enclosing case or frame A are removed it only
being necessary to unbolt the pieces a U and separate the shells at n.
The elevator buckets H¹ are adjustable to any desired angle on their pivot
ends after slackening the clamp bolts which bold them from turning while
in use
The ring plates h³ ³ of the screen H are clamped by the bolts against the
ends of the buckets H¹ and tenon ends of grooved metal bars h.
This manner of constructing the screen frame of separable plates and bars, and
of making the elevating buckets separately from the screen frame enables me to
repair the worn portions, and thus avoid the extra expense of renewing the screen
entirely as is necessary when the frame is cast in one piece
The bars by being filled with wood form a foundation upon which to fasten
the wire gauze, and also serve for stiffening the screen, and for agitating the
substances as they are being carried up by the revolving screen elevator.
The screen is revolved by friction rollers 6 b on shafts b¹ 63, which shafts are
driven by belts c c¹ set in motion by the shaft Ms which drives the toothed gearing
of the pulverizing rollers as will be hereinafter described.
The frame or outer enclosing case A is circular in form and provided with outside
feed hoppers O, O, one on each side; and with an interior hopper G³, the latter,
being suspended upon cross screw rods m by means of hooked shaped brackets m³
formed on the hopper. The lower section a³ of the frame or outer case is tapered
or funnel-shaped, and open for the discharge of finely pulverized substances.

page_text: The sections a a¹ a* a³ of the frame or outer case A have laterally extending
flanges a, a, a,.formed on them, and when they are brought together from the
separated condition shown in figure 3, to a united condition as shown in figures 1,
2 and 11, the fastening bolts u can be passed through the flanges outside of the
case, and thus a strong and firm frame or outer case is produced which is readily
divisible. On the lower section as bolting flanges a are provided and these serve
for sustaining the pulverizing machine upon the foundation sills of the frame P.
The lowermost section a' is formed with a slightly overlapping flange aº, and
within this flange the lower extremity of the section a' extends, and bolts a¹º are
passed through the flange and into the section a² as shown. At the bottom of this
section a oblong openings t are provided so as to allow of its being fitted over the
friction roller shafts or to permit it to be withdrawn from the said shafts.
Upon the top and bottom of each of the side sections a¹ a bearing brackets d'
are formed as shown in Figure 2, and the boxes d' de for the journals go go of the
pulverizing rollers G G¹, together with devices S for adjusting the movable journal
boxes, are applied upon these brackets in the manner shown.
The adjusting devices with the blocks and plates for retaining the boxes in
proper position, may. be similar to those described in the said United States
specification or they may be of any other suitable construction.
The section a of the outer case or frame is provided with oblong openings d';
and the side sections a¹ a* with circular nearly circular, or other properly shaped
openings d for the journals of the pulverizing rollers, while the section a' has
oblong openings t as hereinbefore described to admit the shafts or journals of the
friction rollers. The respective openings are shaped to suit the necessary adjust-
ments of the journals of the pulverizing rollers and the friction rollers, as will be
seen by referring to Figures 1, 2, and 3.
The portion of the periphery of the outer case which laps over the joint between
the sections a¹ a* and a³ and abuts against the periphery of the sections a', a* is
formed upon the section a³, as indicated at d, and thus a completely closed
circular chamber can be formed notwithstanding the portions a, a*, a³ are
constructed separately, and this will be the same whether one or both of the side
sections a¹, a* are constructed separately from the section a³. With such
construction the section al is removable by sliding it off the journals of the
pulverizing rollers without disturbing the gearing on the right hand side a* of the
enclosing case or frame A.
The pulverizing rollers G G₁ are formed with grinding shells m³ of hard white
or chilled metal, which may if necessary be provided with soft linings which can
be bored tapering and fitted upon tapered hubs m*, whereby a wedging fit can be
secured, as indicated at 87, between the shells m³ and the said hubs m when the
shells are drawn upon the hubs by bolts. The shells being bored tapering and
fitted upon tapered hubs are drawn up and held firmly by means of the screw
bolts m³, which pass through openings formed respectively half in the hubs m* and
half in the shells m³ the heads of the bolts at one end and the nuts at the other
binding respectively upon the ends of the shells and ends of the hubs as shown in
Figures 2 and 4.
Both sides of the outer case A are alike and the inner shell plates B B' are also
alike, but the journals of the rollers on one side are lengthened and carry gear
wheels M, M, and one shaft of one pair carries a gear-wheel M³ and the other shaft
of the other pair a gear wheel M³, which wheels are driven by an intermediate
gear-wheel M* on a centre shaft M³ the said centre shaft being boxed at one end
upon the outer casing A and passed through a spider M which supports and
sustains the extended enda of two of the journals of the rollers G, G¹. The
shaft M5 being sustained upon the frame P and casing A, and the spider being
fitted loosely on this shaft, the said spider becomes suspended by the shaft, and
is thereby enabled to hold up, and apart, the said ends of the journals of the
rollers G G

page_text: On the shaft M³ a gear wheel N is provided, and this wheel is driven by a
smaller gear wheel N¹ on the pulley and balance wheel shaft N'. The shaft M,
by being provided with a bearing or box M10 on the enclosing case A is partly
supported by the said case, while the said shaft with the shaft N is also supported
by the frame P; and the shaft b³ while being supported by the frame P is
supported upon the case A as will be presently shown. The shaft M³ carries a
pulley M, and from this pulley a belt c passes to a pulley of of a shaft 63. The
shaft 63 enters the case A, being boxed at b upon the lower section a* of the said
case. Upon the shaft b³ and a shorter shaft b¹, driving friction rollers b² and 6*
are applied, and these shafts are connected by means of a belt c¹ passed from the
pulley c³ on the shaft b³, and a pulley c on the shaft b¹ as shown in Figures 2
and 9.
The revolving elevating screen is arranged centrally within the case A upon the
driving friction rollers 6 6, its shouldered portion r resting upon the rollers,
while its screen or wire gauze portion revolves between the same. The elevating
buckets H¹ of the screen being made separate from the ring plates h³ of the screen,
and their ends being formed with short journals f, which fit into sockets or holes
formed in the said plates h³, can by slackening the nuts of the clamping bolts L, be
changed in position, and by these bolts again clamped tightly between the ring
plates when they have been set at proper angle for elevating the substances and
discharging them at the top of the case for a second grinding operation. The
buckets do not turn on their journals when in operation, but by providing them
with the journals f and making them separate from the screen, they can be set
with the proper pitch, or can be adjusted very accurately so as to be caused to
discharge more or less freely according to the speed at which the screen is operated
may require; and after being adjusted they can again be made rigid with the
screen frame.
The tenons h of the bars h enter sockets in the ring plates h³, when the
clamp bolts are drawn up tight and thus will be kept in position when in
operation.
Into the grooves g of the bars, wooden strips g¹ are fitted, and these strips afford
a suitable foundation into which tacks or screws may be inserted for securing the
wire gauze upon the metal frame. In the peripheries of the ring plates h³ of the
screen, grooves g³ are formed and into these grooves wood g³ is placed so as to
afford a foundation into which the tacks or screws which secure the edges of the
wire gauze in place may be inserted.
The shell plates B, B₁ slide over the journals of the rollers G G¹; and are
supported on rods m held by the outer case or frame, and while in position they
close the side openings of the ring plates of the screen. They have apertures t³, t³,
through them coinciding with the apertures d', d³ for the journals of the rollers
and also passages o' at their upper edges coinciding with the two outside feed
hoppers O, and are connected together so as to almost touch the ring plates of the
screen, or so as to stand a short distance away from the same, by means of bolts n
which cause them to slide on the rods m, m. The bolts n may be provided with
adjustable shoulder-nuts nº, and may be either rigidly drawn against the shell
plates, or have their heads or nuts cushioned against spiral springs. I prefer the
rigid manner of fitting the bolts as shown.
The shell-plates B B¹ of the screen confine the substances to be pulverized
within the screen, and thus prevent escape of the same, except when finely
pulverized, in which case they are discharged through the meshies of the wire
gauze.
The revolution of the screen is produced by a positive motion, imparted to the
friction rollers by means of the belts and pulleys described, and set in motion by
the power shaft which sets in motion the gearing for driving the pulverizing
rollers.
The different apertures for the journals and shafts may be closed on the outside

page_text: of the case A by means of spring-pressed discs or plates t¹, in order to make every-
thing as tight and close as possible in the same manner as described in the said
former specifications
The hopper G' which is placed upon the rods m is supported thereby between
the upper and lower sets of pulverizing rollers; and by its tapered sides it properly
conducts the substances between the lower set of rollers, as will be clearly seen
from the drawings.
The shell-plates may be made without a division at U, by making the
division glow enongh to allow the said shell plates to be slipped laterally into
the outer case, and to permit the plate B to be slipped out of the case when the
cap section a has been removed. Also the section a* on the right hand side of
case A may be cast with the part a² without altering the general plan of this
invention, and therefore I do not confine myself to having both portions a¹ a*
constructed separately from the sections a³, although it is best for packing and
transportation to have the sections a¹, a* separate from the sections a³. If the
section a* is cast with the section a it will be in all respects substantially as
represented except that the division line 8 will not be formed, nor the horizontal
bolting flanges a and a provided on the right hand side of the sections a* a³;
there being only the oblique bolting flanges a with the brackets d' formed on the
said section a*.
The part a might be modified by bolting the journal boxes of the friction
rollers 6, 6 directly upon the lower edge of the section a³, so that, by unbolting
the boxes, access to the shafts 61 and 63, could be had, or the said shafts and friction
rollers lowered for removal or other purposes; and the gear wheel N, the pinion N¹,
the shaft N2, and the fly wheel and pulley may be dispensed with, and a pulley
placed upon the shaft M, which may for this purpose be extended, and the machine
driven directly from this pulley
In practice the improved case A, the inner shell-plates B B¹, the revolving
elevating screen, the driving friction rollers, and the interior hopper may be so
modified in construction as to be adapted for use in combination with either one,
two, three or more sets or pairs of pulverizing rollers.
Having thus fully described the said invention as communicated to me by my
foreign Correspondent and the manner of performing the same I wish it understood
that I Claim:
First. The pulverizing roller case A having the separately constructed sections a
and a and the side portion a* which are provided with oblique flanges and
fastening bolts, the upper section a being of cap form and separately united to the
side section a' and the portion a* by the said bolts and oblique flanges, whereby
the upper section of the said case is removable in an upward direction, substantially
as, and for the purpose, described.
Second. The pulverizing roller case A having the separately constructed
sections a a¹ a² and the portion a*, which are provided with flanges and fastening
bolts, the side sections a¹ a* being provided with journal bearing supports,
whereby the side section a¹ and the journal bearings on one side of the case or
frame are removable laterally, after the said section & has been removed upwardly,
substantially as, and for the purpose, described
Third. The pulverizer case A having separate sections a³ and a³ united by a
lapping flange and bolts, the section a³ being removable downwardly, substantially
as, and for the purpose, described.
Fourth. The pulverizer roller case A formed of the top section a, side or middle
sections a¹ a* and lower sections a² and a³, in combination with the pulverizing
rollers, the driving friction rollers, and the journals or shafts and boxes of the
said rollers, substantially as, and for the purpose, described
Fifth. The combination of the inner shell plates B B', the supporting rods m the
uniting bolts n, the sectional case A, the revolving elevating screen H, H¹³, and
the pulverizing rollers, substantially as, and for the purpose, described.
Sixth. The combination of the interior hopper G and the supporting rods m,

page_text: with the outer case A provided with the outside feed hoppers O, the rollers & G¹;
and the revolving screen H, substantially as, and for the purpose, described.
Seventh. The revolving screen provided with ring plates h², clamping rods 7 and
elevator buckets H¹ having short journals, and being adjustable between the said
plates, substantially as, and for the purpose, described
Eighth. The revolving screen provided with ring plates h³, clamping rods 7 and
separately constructed bara of metal h which are filled with wood and clamped
between the said ring plates, substantially as, and for the purpose, described.
Ninth. The revolving screen provided with the ring grooved plates h³ and
wood g³, substantially as, and for the purpose, described.
Tenth. The revolving screen provided with the ring plates h³, bars h, and the
wood fillings g¹ and g³, substantially as described.
Eleventh. The combination of the pulverizing rollers, a casing therefor, a
revolving elevating screen enclosing the said rollers, the gearing for the pulverizing
rollers, and the gearing M² c, c¹, c³, c³, c6, the shafts 6' 6ª, and the friction rollers b³, b
for driving the revolving elevating screen, substantially as, and for the purpose,
described.
Twelfth. The combination of the pulverizing rollers G G³, the revolving
elevating screen H H¹, the enclosing roller-case A, and the friction rollers 6º ¿ª
for frictionally driving the said screen, substantially as, and for the purpose,
described
Thirteenth. The combination with the rollers and enclosing case A of the
central shaft M³, the gear wheels M, M', M', M³, the journals go go, the spider M*,
the gear wheels N, Ñ³, and the pulley shaft N', substantially as; and for the
purpose, described.
In witness whereof I the said William Robert Lake have hereunto set my
hand and seal this Ninth day of October in the year of our Lord One thousand
eight hundred and eighty three.