An Apparatus whereby Solid Carbonic Anhydride can be Converted into the Liquid Form and thus Stored.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
An Apparatus whereby Solid Carbonic Anhydride can be Converted
into the Liquid Form and thus Stored.
I, ALEXANDER FORBES WATSON, of No. 38, Westmoreland Street, in the City
of. Dublin, Chemist, do hereby declare the nature of this invention to be as
follows:
The invention relates to an apparatus constructed to withstand high pressures
which admits of the easy introduction of carbonic anhydride in the solid form and
of, subsequent closing in a manner which renders the apparatus gas tight at high
pressures. When the solid carbonic anhydride is introduced into such an apparatus
and enclosed therein and allowed to come to the temperature of the surrounding
atmosphere the solid carbonic anhydride is converted into the liquid form.
For this purpose I have constructed a cylinder made of steel which is capable
of withstanding a pressure of 3500 lbs. per square inch. The cylinder is composed
of two parts viz. a body and a cap. The joint between the body and the cap is
made by means of a screw or screws and a washer. The joint may be rendered
gas tight at, any pressure caused by saturated carbonic anhydride vapour at
ordinary temperatures. The cap carries a valve whereby carbonic anhydride may
be withdrawn.
11 1
1000
An Apparatus whereby Solid Carbonic Anhydride can be Convertęd
into the Liquid Form and thus Stored.
I, ALEXANDER FORBES WATSON, of Number 38, Westmoreland Street, in the City
of Dublin, Chemist, 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:-
My invention relates to an apparatus for storing carbonic anhydride when
obtained in the solid form.
For this purpose I have constructed a cylinder made of steel and tested up to
3,500 lbs. per square inch consisting of a body (Sheet 1, Fig. 4, (i)) and a detachable
cap (7). The joint between the cap and body of the cylinder is made gas-tight at
pressures caused by saturated carbonic anhydride vapour at ordinary temperatures
by means of a screw (h) preferably with buttress threads and a washer (g) which
may be of metal such as soft copper or lead or of rubber or gutta percha. The

page_text: washer is kept in its place by a collar (f) sweated into the cap and the top of the
body of the cylinder is made sloping towards the outward surface so that when the
cap is tightened the washer is pressed outwards towards the joint. The cap carries
a valve (e) through which carbonic acid gas may be withdrawn from the cylinder
and the lower part of it is made octagonal to fit the spanner (Sheet 1, Fig. 2). The
spanner is provided with a plate (4) to keep the head in its place and a support (b)
which rests against the cylinder as shown in Sheet II Fig. 1.
In order to facilitate the handling of the cylinder it provided with a collar
as m (Sheet 1, Fig. 3) made in halves bolted round the body of the cylinder as
in (Sheet II Fig. 1. The collar has two arms which turn in the supports
((n) Sheet II Fig. 1) resting on the pillars (). The cylinder can thus swing
on the arms of the collar as shown in Fig. 5 Sheet 2 and can be readily washed
out. If the supports (n) and (o) be not tall enough a pit may be dug between the
supports to allow the cylinder to stand upright. The operation of filling is con-
ducted as follows:-The cylinder stands upright without its cap and solid carbonic
anhydride is shovelled into it. When it is full the cap is screwed on by hand
as far at it will go the spanner is then put in position the handle (c) being added
if necessary and the cap pulled tight. The cylinder and the contents are then
allowed to come to the temperature of the surrounding atmosphere when carbonic
acid gas may be withdrawn from the valve (e) as required.
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:-
The apparatus hereinbefore described being a steel cylinder fitted with a cap
attached by means of screws with buttress or other threads and a valve and
rendered gastight by means of a washer of metal or rubber or gutta percha kept
in its place by a collar.`