Improvements in Apparatus for Use in Boiling Esparto Grass and other Fibrous Materials.
Year: 1888

page_text: Date of Application, 3rd Apr. 1888
Complete Specification Left, 31st Dec., 1888)
Complete Specification Accepted. 5th Feb., 1889
Improvements in Apparatus for Use in Boiling Esparto Grass and
other Fibrous Materials.
I, JOHN TURNBULL., Junior, of 255 Bath Street, Glasgow, in the County of Lanark,
Consulting Engineer, do hereby declare the nature of this invention to bo as
follows:-
This invention relates to apparatus for use in the process of boiling esparto grass
and other fibrous materials and the improvements have for their objects the quickening
and cheapening of the process, providing freer circulation of the liquors employed
and facilitating the charging and emptying of the boiling pots.
These objects 1 attain by employing in lieu of the vomiting pipes or steam jets
presently used for raising and discharging the liquor over the fibre, a pump or pumps
which I connect to the bottom of the boiling pot so as to draw off the liquor and
create a partial vacuum in the bottom chamber thereof whilst raising and discharging
the liquor by suitable pipes over the fibre through which it the more rapidly permeates
owing to the partial vacuum underneath. The esparto grass or other fibrous material
may be placed in the pot in the usual way but as a means of facilitating the charging
and emptying of the pot 1. prefer to place it in an open cage or basket which may be
lowered or otherwise placed in position in the pot or boiler and lifted or drawn out to
be replaced by a duplicate cage or basket containing a fresh charge, when the boiling
operation is completed.
DL: : 1908
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.

page_text: Improvements in Apparatus for Use in Boiling Esparto Grass and
other Fibrous Materials.
I, JOHN TURNBULL, Junior, of 255 Bath Street, Glasgow, in the County of Lanark,
Consulting Engineer, 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 :-
This Invention relates to apparatus for use in the process of boiling osparto grass
and other fibrous materials and the improvements have for their objects the quickening
and cheapening of the process, providing freer circulation of the liquors employed and
facilitating the charging and emptying of the boiling pots.
These objects I atlain by the use of the apparatus represented in vertical section at
figure 1 and in plan at figure 2 of the annexed drawings in which in lieu of the
vomiting pipes or steam jets commonly used for raising and discharging the liquor
over the fibre a pump or pumps A is or are employed and connected by pipes B to
the bottom of the boiling pot C so as to draw off the liquor and create a partial
vacuum in the bottom chamber C¹ thereof said chamber C¹ being formed between the
lower outer shell of the pot and a perforated plate or disc (supported thereover.
The liquor is raised and discharged by suitable pipes B' over the fibre through which
it the more rapidly pormentes owing to the partial vacuum created in the chamber C¹
underneath. The esparto grass or other fibrous material may be placed in the pot in
the usual way but as a means of facilitating the charging and emptying of the pot I
prefer to place it in an open cage or basket D as shown applied in the pot on the left
hand side of the drawings which may be lowered or otherwise placed in position in
the pot or boiler C and lifted or drawn out to be replaced by a duplicate cage or
basket containing a frosh charge, when the boiling operation is completed.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
1. The combination of parts constituting the improved apparatus for use in boiling
esparto grass and other fibrous materials substantially as herein before described.
2. In apparatus for boiling esparto grass and other fibrous materials the combination
with the boiling pot or vessel having a vacuum chamber formed in the bottom thereof,
of a pump or pumps connected thereto and arranged to draw off the liquor therefrom
and discharge it over the materials substantially as described.
Dated this Twenty-ninth day of December 1888.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.