Year: 1886

page_text: I JOHN ROBERT ALSING of 27 Leadenhall Street in the City of London
Manufacturer do hereby declare my said invention and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement:―
My invention relates to improvements in that class of triturating cylinders
invented by me and well known as the Alsing pulverizing cylinder in which
granulated substances are introduced together with pebbles or balls and triturated
by a tumbling, sliding and rolling of the charge caused by revolving the cylinder.
The object of my invention is to provide additional improvements in the con-
struction which will adapt my mill for combining with its well known advantages
even those obtained by wet grinding so that the substances which have to be mixed
with water before being moulded and baked as for instance porcelain ware, or such
as have to be mixed with oil as pigments for paints, may be most advantageously
and thoroughly mixed in the grinding while the presence of the liquid by its
Boftening and disintegrating influence greatly facilitates and hastens the process of
trituration.
Mills constructed according to this invention samples of the charge to test its
fineness as its trituration proceeds, may be taken out and examined without
stopping the motion of the cylinder or removing the cover of the charge-opening,
and whereby the cylinder will be kept completely tight and prevent any rust of
iron from coming in contact with the charge during the process of wet grinding
and whereby the cover of the charge-opening may be removed and replaced by a
discharge spout or funnel capable of retaining the triturating balls while allowing
the ground charge to flow out and preventing leakage and spilling upon the sides
of the cylinder when the discharge-pipe is being secured in place of the cover and
the cylinder is revolved to bring the spout down in the lowest position for
discharge.
The construction of the cylinder is such as to adapt it without change equally as
well to the grinding by dry as by the wet process.
In the accompanying drawing fig. 1 is a plan view partly in section of a
triturating cylinder provided with my present improvements the section being
taken on the line x, x, x, of fig. 2 through the charge and sample opening, and the
cylinder revolved in the direction of arrow 1 to place the said opening in about

page_text: a horizontal position. Fig. 2 is an end view of the same partly in section on the
line y. y. of fig. 1.
Fig. 3 is an end view partly broken out and shewing the discharge spout
inserted in the charge opening in place of the cover. Fig. 4 is a plan view of the
discharge spout in position shewn at fig. 3. Fig. 5 is a detailed view of the lining
block in which the cover fits tightly A is the exterior iron shell of the cylinder
covered on the inside with a wooden lining a within which latter is the lining B C
of porcelain or other vitreous substance cemented together by plaster of paris as
usual,
as
The end lining C which has heretofore been made straight or parallel with the
outer end surface of the cylinder,-I make concave on the inside or spherical a
shown in fig. 1. To allow of taking out samples of the charge without stopping
the motion of the cylinder,-I have prepared and provided the following devices.
In a suitable small aperture E in the side of the cylinder is fitted an internal
valve D, the valve stem d of which projects a distance beyond the outer surface of
the cylinder and is provided with a spring e which by its tension keeps the valve
closed The outer end of the valve stem d is preferably provided with a friction
roller f. G is the sampling receptacle made of a plate or casting curved in the
direction of the motion of the cylinder preferably grooved upon its upper surface
and provided with wheels g by which it is movable upon a rail-track F underneath
the cylinder as shown in figs. 1 and 2. It is also provided with a small spout g¹
preferably bent so as to project its discharge end toward the front of the cylinder.
The device G is provided with a handle I by which it may be conveniently moved
upon the rails F, a stop h limiting the inward movement when the device is in
position for causing the valve D to open and deliver a sample.
The casting G is so constructed and arranged that its upper edge at i is at the
same (or a slightly greater) distance from the outer surface of the cylinder as the
length of the portion of the valve stem which projects beyond said surface when
the valve is closed.
When it is desired to take out a sample to ascertain the fineness of the charge
the casting G is moved in the position shown in fig. 2 the front wheels g coming
against the stop h. The cylinder revolving in the direction of arrow 2 and the
roller at the end of the valve-stem coming in contact at i with the grooved
surface of the casting and rolling in contact with the latter the pitch of the curved
surface gradually compressing the spring e and thus opening the valve D causes a
portion of the charge of the cylinder to drop out through the aperture E. After
passing the point the pressure on the spring is released and thus closes the valve,
the powder falling into and through the spout g¹ into any suitable box or receptacle
placed to receive it. The casting G is then moved by the handle I to bring it out
of operation and allow the cylinder to revolve as usual with its valve D closed.
As porcelain material is spoiled by rust and in admitting water into the cylinder
rust from the outer shell might easily work itself into the substances, besides that
the swelling of the wooden lining by the water might cause damage. I provide
between the wooden lining a (or the shell in small cylinders where a wooden lining
is not used) and the lining B. C, a waterproof layer H of hydraulic cement, rubber
cement or any other waterproof substance. The cover J of the charge opening is
kept tight in the following manner; the iron cap d' of the cover which is provided
with the ordinary handles f¹ and a central seat o (against which the screw of the
ordinary screw bar fastening; presses to keep the cover tight) has a recess in its
inner surface in which a slightly conical block e¹ is secured preferably by heating
and shrinking the iron cover on it. The block e' is turned on its surface where it
enters and fits tightly in the lining B and a special block K constituting a portion
of the lining B is specially made and provided with a round conical opening turned
to receive the block e¹ so that the two will fit together in the manner of a stopper
ground in the neck of a bottle.
The granulated substances to be operated upon having been introduced into the
cylinder through the charge opening and the required quantity of triturating balls

page_text: or pebbles and a liquid, as water, oil, or other suitable substances is introduced
with it the cover J is tightened and the cylinder revolved until the desired
fineness is obtained the fineness being ascertainable by the before mentioned
sampling device.
To remove the charge the cylinder is placed in position with its cover up the
cover is then removed and in its place is inserted the discharge funnel L. This is
provided with a hollow slightly conical part suitable to replace the block e¹
in the opening, and its inner end is provided with grate-bars by which the
triturating balls are retained in the cylinder while the finished charge is allowed
to flow out.
In one piece with the funnel L is the discharge pipe or spout M preferably curved
as shewn in fig. 3 to insure an easy flow of the substance and covered on the end
with a cap m secured by screwing, or simply a bayonet joint or by other suitable
fastening sufficient to prevent spilling while turning the cylinder to the position
shewn in fig. 3.
The charge opening is surrounded outside the cylinder with a ring k of a flat
surface and the discharge spout is provided with a flange in which is an annular
groove and in the said groove a rubber ring n placed on its edge, which, when the
discharge spout is in position tightens against the aforesaid rim or ring k. Upon
the surface of the discharge spout in line with the cylinder's radius drawn through
the centre of the charge opening is a seat O exactly corresponding to the similar
seat o upon the cover J; so that when the cover is removed and the discharge
spout inserted in its place, the same ordinary bar and screw j may be used to
secure it in place and tighten the packing ring n against the surface of the ring k.
It is evident that when the cylinder is used for dry grinding only, the discharge
opening may be closed by the old fashioned grate without the spout.
To prevent stopping of the discharge by a vacuum caused in the cylinder air
should be admitted above the surface of the liquid, this is done without any extra
valve for the purpose by the before described internal valve D.
The discharge may be collected in any suitable receptacle below the discharge
spout or may be conveyed to a tank a distance away from the cylinder by con-
necting a pipe to the end of the spout.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is
1stly A triturating cylinder having the lining B and concave ends C substantially
as and for the purpose set forth.
2ndly The combination of a triturating cylinder A provided with aperture E, the
internal valve D having lugs upon the outer end of its valve stem and a roller f
pivotted between said lugs the spring e¹ and a movable piece G substantially as set
forth.
3rdly The combination of a triturating cylinder provided with an aperture E
with an internal valve provided with an outwardly projecting stem fitted in the
said aperture a valve spring e and a movable piece G substantially as and for the
purpose herein set forth.
4thly In a triturating mill the combination of a cover J composed of the cap d'
and the inner block e¹ secured to the said cap with the block K constituting a part
of the cylinder-lining and having a hole or opening suitable to tightly fit the said
block et substantially as specified.
5thly The combination with a triturating cylinder the spout or funnel L provided
with an inner grate and a discharge-pipe M and adapted to replace to cover in
the charge opening substantially as specified.
6thly In combination with a triturating cylinder the spout or funnel L provided
with an inner grate and an outer discharge pipe M and adapted to replace the
cover in the charge opening the same being provided with a flange and a packing
ring n in the said flange and with the screw-seat O to form a tight packing with the
ring k surrounding the discharge opening and securing the said spout or funnel by

page_text: the same fastening-device by which the cover is secured substantially as herein-
before set forth.
7thly The mode herein described of triturating granulated substances which
consists in submitting them enclosed with a quantity of pebbles or balls and a
liquid in a water-tight cylinder to the triturating action of such balls caused by
revolving the said cylinder aided by the softening and disintegrating influence of
such liquid.