Year: 1886

page_text: дд шprovoc
I JOHN ROBERT ALSING of 27 Leadenhall Street in the City of London
Manufacturer do hereby declare my 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 triturating mills in which granulated substances are
introduced, together with a quantity of balls or pebbles in a cylindrical drum and
are reduced to an impalpable powder by the grinding action of the said balls due
to the revolving of the drum.
'
The object of my invention is to provide a cheap and efficient construction
whereby several different substances separate from each other, may be triturated
simultaneously in one mill or machine and each separate substance may be removed
in the order in which it is ground fine enough and replaced by a new charge
without impeding the operation upon any of the others.
:
A
The invention is intended more especially for grinding small quantities at a time
and thus particularly adapted for druggists' use and for grinding fine colours. It
comprises mainly a revoluble drum provided with interior compartments adapted
to receive in each compartment, a separate jar charged with balls and material to
be ground as will be hereinafter described with reference to the accompanying
drawings in which Figure 1 is a perspective view of the mill open. Figs. 2 and 3
are central sections of two modifications of the jar. Fig. 4 is a top view of a
third modification of the jar. Fig. 5 is a section of the same.
A is the drum made preferably of longitudinal pieces or bars of wood a sufficient
in number to surround and retain the inclosed jars. The drum is divided
longitudinally in two halves or parts A¹ A³, hinged together so that the part A¹
serves as a cover to be folded or closed upon the part A² and secured when so
closed by straps and buttons or other suitable fastening devices b. The part A³ is
formed by securing a number of the pieces a to cylindrical end pieces B, to which
are fastened by flanges c to studs or journals C. by which latter the drum A is
mounted in bearings d upon a suitable frame-work D, and one of the said journals
projects through its bearings sufficiently for providing it with fast and loose
pulleys d, by which, and a belt power, is transmitted to impart rotary motion
to the drum or to stop its motion as the case may require The drum A is made
long enough to accommodate say from one to six jars and is preferably though not
necessarily divided by partitions e into compartments one for each jar.

page_text: To facilitate the insertion and removal of the jars the partitions & are divided
diametrically, one half being attached to the cover A and the other half to the A'
and for the same purpose the end walls B of the drum are bevelled of the inside
at n as seen in fig. 1. Each compartment may be provided with a separate cover
but I prefer using one cover common for all as shewn in the drawings.
F are the jars made of porcelain, glass or other like material and rounded off at
the corners to prevent any substance for sticking there and remaining unground.
The mouth or charge opening of the jar is funnel shaped and has two objects, one
object being to prevent spilling of material when charging the jar, and the other
to afford lugs or stops f¹ (as in figs. 2, 4 and 5) for retaining a cross bar H through
which a thumb screw his threaded and used for pressing down and tightening the
plug stopper or cover G in the neck of the jar. The said retaining stops f1 against
the outward counter pressure of the cover G may be obtained by simply making
two diametrically opposite holes through the wall of the funnel f as in fig. 2 or
by forming lugs on the inside thereof as in figs. 4 and 5. or in order to prevent
breaking the stops by careless handling when they are thus formed in the flange,
they may be obtained by the construction shown in fig. 3. In this the bar H is
prevented from lateral displacement by being retained in diametrically-opposite
notches in the funnel f and a strap or band g. centered in a groove or notch in
the surface of the jar passes across the bottom and along opposite sides of the jar
and has loops at its ends through which the ends of the bar H are inserted and
by which it is held against outward pressure.
It will be seen that the jars F are the grinding cylinders proper and the drum A
is simply a revoluble receptacle in which they are clamped and with which they
are revolved. The jars are independent of each other and chargeable with different
contents and the number which can be worked at a time depends only on the
length of the drum. A jar in which the material has been ground fine enough
may be removed in a few seconds and replaced with another the cover A fastened
down and the mill again started to continue grinding the contents of the remaining
jars without waiting for the removed jar to be emptied of its finished contents
and recharged. The shape of the drum and jars (round polygonal, or other) is
immaterial so long as the drum clamps and retains the jars.
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
1st The combination of separately chargeable jars F with a revoluble drum A
having interior compartments and provided with a cover A¹ för receiving; retaining,
and removing the said jars substantially as specified.
2nd In combination with removable jars the drum A divided longitudinally
in two parts A1, A2, hinged together and provided with fastening devices 6 and
transverse partitions e one of the said parts A2 having end walls B and journals C
mounted to revolve in bearings d substantially as and for the purpose set forth.
Dated this 97th day of Anvil 1006