IMPROVEMENTS IN AND RELATING TO BOILERS FOR USE and in what
Year: 1884

page_text: I HENRY HARRIS LAKE, of the firm of Haseltine, Lake, and Co, Patent Agents,
Southampton Buildings in the County of Middlesex do hereby declare the nature
of my invention for "IMPROVEMENTS IN AND RELATING TO BOILERS FOR USE
and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :—
IN TREATING WOOD OR OTHER FIBROUS MATERIALS WITH ACIDS
"3
This invention relates to boilers for treating wood and other fibrous matters by
means of acids.
An inconvenience adherent to boilers hitherto used for the said purpose, is, that
because of the unequal dilatation of lead compared with steel, cast iron, wrought
iron, and other metals and because of the little elasticity of lead by heating, the
lead does not retain the same shape as the boiler itself, whereby the thickness of
the lead will be different at different places, so that cracks will soon arise in the
lead.
This again necessitates repairs of the lead lining after almost every boiling.
In order to avoid this inconvenience, which will be the greater, the larger the
boiler (provided that the lead lining forms a coherent piece) I have divided the
boiler into several small sections, whereby the dilatation of the respective metals
will be compelled to take place within such narrow limits that it practically may
be considered as removed.
In the accompanying drawing,
Figure 1 is a vertical, and
Figure 2 is a horizontal section of the boiler upon the line A. B Figure 1.
Or it may
A is a cylindrical boiler with rounded bottoms made of steel, wrought iron, cast
iron or other suitable metal, revolving vertically on the pivots a.
revolve horizontally or be stationary without pivots.
When the cylinder is revolved, the movement is communicated by means of the
worm wheel f, which by means of the worm g is connected with the bevel pinion i

page_text: .
so that by throwing the belting onto the pulley h, the apparatus is thrown into
gear, but on the contrary, when the belt is moved onto the loose pulley h¹ the
boiler is brought to rest.
The cylinder A comprises, besides the rounded bottoms, a number of cylindrical
rings 6 of from 12 to 24 inches in height, which rings are provided with rounded
flanges beaten out of the plate or cast therewith. Each cylindrical ring is lined
with a lead plate c, folded over the flanges which are secured to each other by
means of the screw bolts d, so that the lead plate at the same time serves as
packing between the cylindrical rings. By this construction the need of lead
soldering, which in former constructions offered many practical difficulties is almost
obviated.
In each ring b metallic tubes should be inserted or apertures formed for letting
out the heated air from between the lead lining and the walls of the boiler.
The boiler may be filled and emptied through the man-boles k and ¹, which are
covered by means of the lids x and x¹, secured to the other part of the boiler by
means of the movable screws and A.
For taking out samples of the mass during the process cocks m and m¹ are
provided.
n is a blow-off cock, by which the steam may be blown off after the boiling is
finished. Through the tubes o steam is let into the tubes p, from which the steam
then passes through the tubes q into the boiler.
In order to diminish the radiation of heat, the boiler should be covered outside
with some insulating material surrounded with a wood casing, secured by means of
ties. The tubes q are secured within the boiler in any suitable manner, for instance
means of supporters v.
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. A boiler, which is composed of lids or covers and a greater or smaller
number of cylindrical rings with rounded flanges, secured together by means of
screw-bolts.
Second. The method of lining the rings with lead which is completely drawn
over the flanges, so that the lead serves as packing between the flanges of the
cylindrical rings.
Dated this 18th day of November 1884