and other Fibre in the Manufacture of Paper and other Pulp.
Year: 1885

page_text: and other Fibre in the Manufacture of Paper and other
Pulp.
I CHARLES CHESLEY SPRINGER of Boston Massachusetts in the United States
of America Barrister at Law do hereby declare the nature of my invention for
" IMPROVEMENTS IN THE CONSTRUCTION OF BOILERS FOR TREATING WOOD AND
OTHER FIBRE IN THE MANUFACTURE OF PAPER AND OTHER PULP
to be as
follows:-
"
This invention relates to the construction of the lead-lined boilers which are
used for the treatment of wood and other vegetable fibre with acid sulphites in
the manufacture of paper and other pulp, and the invention consists principally
in a method of forming the joints of the lead lining of such boilers without burning
and without the use of the blow pipe.
In carrying out my invention I prefer to use. a compound lead and perforated
iron lining similar to that described in the Specification of a Patent granted to
John Makin dated October 24th 1884, No 14071 but I also wish to reserve to
myself the right to apply my invention to fixing linings made of cast or rolled
lead or other suitable metal or alloy.
I make the lining (preferably of combined metal) in sections of such a form
and size as will leave an open joint between the same and I pack this joint with
asbestos.
Over each joint I lay a covering strip made of the combined lead and perforated
iron (in the same way as the lining itself) placing a strip of asbestos cloth between
the lining and the strip, and I drill holes at suitable intervals through the said
covering strip and corresponding holes through the boiler itself.
I then pass bolts with lead-covered heads through the covering strips between
the joint of the lining and through the boiler, placing asbestos washers between the
head and the covering strip and fastening the same firmly by screwing nuts onto
the ends of the bolts outside the boiler.
I thus secure the compound lining to the boiler by means of these bolts and
covering strips without any necessity for burning the edges together or using the
blow pipe in any way, and it will be evident that any expansion of the lead will
only make the joint tighter by compressing the asbestos packing.
At the same time this method of fastening the sections of the lining will admit
of any one or more of the sections being readily removed and replaced without
difficulty.
Dnted L
TI 1007
GEORGE DAVIES,
Agent for the Applicant.

page_text: Improvements in the Construction of Boilers for Treating Wood
and other Fibre in the Manufacture of Paper and other
Pulp..
I CHARLES CHESLEY SPRINGER of Boston, Massachusetts, in the United States
of America, Barrister at Law do hereby declare the nature of my invention for
IMPROVEMENTS IN THE CONSTRUCTION OF BOILERS FOR TREATING WOOD, AND
OTHER FIBRE IN THE MANUFACTURE OF PAPER & OTHER PULP 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 the construction of lead lined boilers which are used
for the treatment of wood and other vegetable fibre with acid sulphites or similar
corrosive acids in the manufacture of paper and other pulp, and the invention
consists principally in a method of forming the joints of the lead lining of such
boilers without burning and without the use of the blow pipe.
In carrying out my invention I prefer to use a compound lead and perforated
iron lining similar to that described in the Specification of a British Patent granted
to John Makin dated October 24th 1884, No 14071 but I also wish to reserve to
myself the right to apply my invention to fixing linings made of cast or rolled
lead or other suitable metal or alloy.
In order that my invention may be more clearly understood I have hereunto
annexed a sheet of drawings illustrative thereof and have marked the same with
figures and letters of reference corresponding with those in the following explana-
tion thereof.
Fig. 1. in the annexed drawing is a section (full size) of a portion of a plate of
a boiler with a compound lead lining affixed thereto according to my invention,
and Fig. 2. is a plan view on a smaller scale illustrating several plates joined
together in my improved way.
a, a is the boiler plate and b, b the compound lining.
I make the lining (preferably of combined metal) in sections of such a form and
size as will leave an open joint c, c between the same and I pack this joint with
asbestos or other suitable non-corrodible material.
Over each joint I lay a covering strip d, d made of the combined lead and
perforated iron (in the same way as the lining itself) placing by preference a strip
or layer of asbestos, india-rubber or other suitable non-corrodible and compressible
material between the lining and the strip and between the lining and the plate as
shown by the thick black lines, or laying metal to metal without packing and
I drill holes at suitable intervals through the said covering strip d, d and corre-
sponding holes through the boiler plate a, a itself.
I then pass bolts e, e with lead covered heads through the covering strips d, d
between the joint of the lining b, b and through. the boiler plate, and I fasten the
same firmly by screwing nuts ff on the ends of the bolts e, e outside the boiler.
I thus secure the, compound lining b, b to the boiler by means of these bolts e, e
and covering strips d, d without any necessity for burning the edges together or

page_text: using the blow pipe in any way, and, and it will be evident that any expansion
of the lead will only make the joint tighter by compressing the asbestos or other
packing.
At the same time this method of fastening the sections of the lining will admit
of any one or more of the sections being readily removed and replaced without
difficulty.
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,
First. The method of joining and fixing the sections of the lining of boilers by
means of covering strips of lead combined with iron (or other rigid metal) secured
by lead covered bolts substantially as described.
Secondly. The combination with joints thus formed of a packing of asbestos
india-rubber or other suitable non-corrodible and compressible material substan-
tially in the manner and for the purposes hereinbefore set forth.
Dated this 21st day of March 1886
GEORGE DAVIES,
Agent for the Applicant.