IMPROVEMENTS IN THE CONSTRUCTION OF LEAD LINED BOILERS OR VESSELS to be as follows:
Year: 1884

page_text: USBULS.
We ISAAC SHIMWELL M°DOUGALL and JAMES THOMAS MODOUGALL both of
Irk Vale Chadderton near Manchester in the County of Lancaster Manufacturing
Chemists do bereby declare the nature of said Invention for "IMPROVEMENTS IN
THE CONSTRUCTION OF LEAD LINED BOILERS OR VESSELS to be as follows:-
"
This Invention has for its object to provide Boilers or Vessels (such for example
as are used in making paper pulp from wood or other fibrous materials) with a
secure and firm lining of lead which is much less liable to become detached than is
the case with the said linings as previously attached.
According to my Invention I take any suitable metal or material of greater
strength or rigidity than lead and with perforations or passages therethrough such
as woven wire or metal framework or perforated plates and I bolt or connect the
same together in the shape of the interior of the vessel to be lined. I support the
said metal or material at a short distance from the material of the vessel to be
lined and connect it thereto or support it thereon or thereupon by bolts nuts or
other fastenings or struts forming distance pieces. The heads of the bolts used for
connecting the parts may be used as distance pieces for this purpose. I then apply
the lead which is to form the lining which may be conveniently effected as
follows I form a core (or its equivalent) in the vessel, the exterior of which core
is of the shape which the interior of the lead lined vessel is to have and leaves a
space between itself and the strengthening metal or material. I then run molten
lead into the space between the outer vessel and the inner core (which space
contains the reticulated or perforated strengthening material) and the said lead fills
the said space entering into and passing through the perforations in or spaces
between the parts of the said strengthening metal or material.
Dain : 192
CD1001
J. HENRY JOHNSON,
Agent for the said Isaac Shimwell McDougall
and James Thomas M.Dougall.

page_text: Vessels.
We, ISAAC SHIMWELL M°Dougall and JAMES THOMAS MCDOUGALL, both of
Irk Vale, Chadderton, near Manchester, in the County of Lancaster, Manufacturing
Chemists do hereby declare the nature of this invention for "IMPROVEMENTS IN
THE CONSTRUCTION OF LEAD LINED BOILERS OR VESSELS" and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
This Invention has for its object to provide boilers or vessels (such for example
as are used in making paper pulp from wood or other fibrous materials) with a
secure and firm lining of lead which lining is much less liable to breakage or to
become detached than is the case with the said linings as previously attached
by others.
According to this Invention we take any suitable metal or material of greater
strength or rigidity than lead and with perforations or passages therethrough such
for example as woven wire, or metal framework, or perforated plates, and we bolt
or otherwise form or connect the same together in the shape of the interior of the
vessel to be lined (or approximately so) If this strengthening metal or material be
not formed in one, but be built up of parts, the parts where they join should
overlap or be provided with butt straps and be firmly bolted or rivetted or be
otherwise fastened so that the joints are as strong as the other parts. We support
the said metal or material in the boiler or vessel to be lined, preferably at a short
distance from the inner sides and if necessary we connect it thereto or support it
thereon or therefrom by bolts and nuts or other fastenings or struts or studs
forming distance pieces. The heads of the bolts used for connecting the parts of
the strengthening material may be used as distance pieces for this purpose. We
then apply the lead which is to form the lining, which may be conveniently effected
as follows. We form, place, or build up a core (or its equivalent) in the boiler or
vessel the exterior of which core is of the shape which the interior of the lead lined
boiler or vessel is to have, and leaves a space between itself and the strengthening
metal or material. The core may conveniently be made of cast or wrought metal
built up in segments with internal flanges for convenience of connection, the said
segments being of a size to allow them to be passed through the manholes if such
be used, but the core may be formed and put in place in any other suitable way.
The core is securely held in position by attaching it by bolts to the shell of the
boiler or vessel or to the strengthening material or in any convenient way.
then run molten lead into the space between the outer vessel and the inner core,
which space contains the reticulated or perforated strengthening material and the
said lead fills the said space entering into and passing through the perforations in
or spaces between the parts of the said strengthening metal or material The core
may be made entire and the casting of the lead be done so as to complete the whole
lining at once or the core can be made and put in place part at a time and the
casting be effected portion by portion, as may be most convenient. For the better
We

page_text: convenience of removing the core and for fixing the strengthening medium before
pouring in the molten lead we may provide, when treating certain forms of vessel
or boiler, two manholes opposite to each other so that a straight passage is obtained
through the vessel when open.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
The construction of lead lined boilers or vessels by supporting therein a
strengthening metal or material with interstices or openings in it or between its
parts, and also supporting therein a core or cores so as to leave a space of the
thickness of lead lining required, in which space the aforesaid strengthening metal
or material is situated, and then introducing lead into this space and afterwards
removing the core or cores, all substantially as herein before described.
1
1
100K