A Centrifugal Machine for Separating Acid from Nitro-cellulose or for other like purposes.
Year: 1891

page_text: Date of Application, 12th Aug., 1891-Accepted, 17th Oct., 1891
COMPLETE SPECIFICATION.
A Centrifugal Machine for Separating Acid from Nitro-cellulose or
for other like purposes.
I RUDOLF KRON of Golzern, Saxony, German Empire, Factory Manager, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement :-
The primary object of my invention is to construct an apparatus to be used in
the manufacture of nitro-cellulose or gun cotton for the purpose of separating the
acid from the nitro-cellulose after removal from the acid bath, in an expeditious
manner, with little manual labor and without loss of the nitro-cellulose or of the
acid. The apparatus is also applicable for drying or removing liquid from, other
substances.
The centrifugal machine which forms the subject of the invention is represented
in vertical section in Figure 1 and in front elevation in Figure 2 of the annexed
drawings, and is chiefly characterized by the employment of a centrifugal per-
forated, openwork or foraminous vessel or basket, which can be tipped for the
purpose of emptying its contents, and of a surrounding cylinder or guard against
which the acid or liquid is thrown from the said vessel or basket, the cylinder or
guard being capable of being lifted, lowered or folded clear of the vessel or basket
when the same has to be tipped.
a is a fixed circular framing upon which is mounted the acid or liquid collecting
and delivering trough or vessel b. è is a step or bearing in the framing a for the
vertical driving spindle d. is the perforated vessel or basket mounted on the
spindle d in such manner that it can be tipped as indicated in dots in Figure 1,
while the spindle retains its vertical position. e is the surrounding cylinder or
guard it rests on the upper edge of the trough b. ff are vertical bars fixed at
their lower ends to the framing a and serving as guides to the vertical movement
of the cylinder e which is effected by means of the handle i and winch from which
the cylinder e is suspended being counterbalanced by weights g¹g².
g
The machine is worked as follows:-The nitro-cellulose and acid (or other
material to be operated on) are introduced into the vessel or basket and the
machine is then put in motion. The acid is by the centrifugal force expelled
through the sides of the vessel h, strikes against the cylinder e and runs down into
the trough b. When this operation is finished the rotation of the vessel h is
stopped, the cylinder e next raised clear thereof and then the vessel is tipped so
as to empty its contents into a suitable receptacle placed to receive it.
It will be seen that the operation is performed in a complete and expeditious
manner with little manual labor, and that the vessel never comes in contact with
water which would tend to weaken and dirty the acid.
Instead of arranging for the cylinder or guard e to be raised in order to be clear
of the vessel while being tipped, I can arrange for it to be lowered or to fold
clear of the vessel has will be readily understood.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In a centrifugal machine for separating acid from nitro-cellulose or for other like
purposes, a centrifugal perforated vessel or basket adapted to be tipped, in com-
bination with a surrounding cylinder or guard above a liquid receiving and
delivering trough or vessel, the said cylinder or guard being arranged so that it can

page_text: be moved clear of the centrifugal vessel while this is being tipped, substantially as
and for the purpose hereinbefore described.
Dated this 12th day of August 1891.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Patent Agent.