Ax IMPROVEMENT IN BOILERS FOR DISINTEGRATING AND PULPING VEGETABLE SUBSTANCES
Year: 1863

page_text: LETTERS PATENT to William Clark, of 53, Chancery Lane, in the County
of Middlesex, Engineer and Patent Agent, for the Invention of "Ax
IMPROVEMENT IN BOILERS FOR DISINTEGRATING AND PULPING VEGETABLE
SUBSTANCES." A communication from abroad by William Fittock Ladd,
of Tarrytown, Westchester County, State of New York, and Samuel
Armstrong Walsh, of New York City, United States of America, Paper
Stock Boiler.
Sealed the 14th July 1863, and dated the 20th February 1863.
PROVISIONAL SPECIFICATION left by the said William Clark at the
Office of the Commissioners of Patents, with his Petition, on the 20th
February 1868.
I, WILLIAM CLARK, of 53, Chancery Lane, in the County of Middlesex,
Engineer and Patent Agent, do hereby declare the nature of the said Inven-
tion for "AN IMPROVEMENT IN BOILERS FOR DISINTEGRATING AND PULPING
VEGETABLE SUBSTANCES," to be as follows:-
This Invention relates to boilers for the reduction of vegetable substances
to the condition of pulp suitable for paper stock, or for their disintegration for
any other purpose, either with or without the aid of alkalies or other chemicals.
The principal object of the improvement is to ensure the complete sub-
mergence of the substances in the liquor or solution during the boiling process,

page_text: and to this end the boiler is made of an upright form with a man-hole and man-
head at the top, and with a perforated diaphragm or screen some distance
below, such diaphragm or screen having a man-hole in its centre, corre-
sponding with the first-mentioned man-hole, and communicating therewith by
means of a perforated cylinder or well, and fitted with another man-head. The
vegetable substances are confined below the diaphragm or screen, and the
liquor or solution allowed to rise above it, thereby insuring the submergence
of the said substances.
The mode of operating the boiler is as follows:-The man-heads are both
removed, and the boiler charged with the vegetable substances up to but not
above the man-hole, and the lower man-head then put on and secured. The
liquor or chemical solution of proper strength is next introduced in such
quantity that it will just cover the man-head, completely submerging the
vegetable substances. The upper man-head is then put on and secured, and
the necessary heat applied and continued until the contents of the boiler have
been sufficiently acted upon by the heated liquor or solution. The heat may
be obtained in the boiler either by steam admitted in a coil or otherwise, or
by the direct application of fire. If the latter mode of heating be adopted the
fire may be placed in a suitable car or travelling furnace under the bottom of
the boiler, and removed after the boiler has been subjected to its action for a
suitable length of time. By opening the valve or gate the contents of the
boiler are discharged by the pressure of steami into any suitable receiver.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Clark in the Great Seal Patent Office on the 18th
August 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
CLARK, of 53, Chancery Lane, in the County of Middlesex, Engineer and
Patent Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twentieth day of February, in the year of our
Lord One thousand eight hundred and sixty-three, in the twenty-sixth year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said William Clark, Her special licence that I, the said William
Clark, my executors, administrators, and assigns, or such others as I, the said
William Clark, my executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter

page_text: during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "AN IMPROVEMENT IN
BOILERS FOR DISINTEGRATING AND PULPING VEGETABLE SUBSTANCES," a com". to me
from abroad by William Fittock Ladd, of Tarrytown, Westchester County,
State of New York, and Samuel Armstrong Walsh, of New York City,
United States of America, Paper Stock Boiler, upon the condition (amongst
others) that I, the said William Clark, my executors or administrators, by an
instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
⚫ NOW KNOW YE, that I, the said William Clark, do hereby declare the
nature. of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement, reference being had to the Sheet of Drawing hereunto annexed,
and to the letters and figures marked thereon (that is to say) :-
This Invention relates to boilers for the reduction of vegetable substances to
the condition of pulp suitable for paper stock, or for their disintegration for
any other purpose either with or without the aid of alkalies or other chemicals..
The principal object of the improvement is to ensure the complete sub-
mergence of the substances in the liquor or solution during the boiling process,
and to this end the boiler is made of an upright form with a man-hole and man-
head at the top, and with a perforated diaphragm or screen some distance
below such diaphragm or screen, having a man-hole in its centre corre-
sponding with the first-mentioned man-hole, and communicating therewith by
means of a perforated cylinder or well, and fitted with another man-head. The
vegetable substances are confined below the diaphragm or screen, and the
liquor or solution allowed to rise above it, thereby insuring the submergence
of the said substances.
A is the boiler; a, a, the man-hole at the top thereof; and 6, the man-head
fitted to the said man-hole, and secured in any well-known or suitable manner;
B is the perforated screen or diaphragm arranged horizontally, and secured to
the sides of the boiler; c, c, is the man-hole in the centre of the perforated
diaphragm or screen, and d, the man-head fitted to the said man-hole; G is
the perforated cylinder or well connected at the top with the head or crown
of the boiler, and at the bottom with the diaphragm or screen B, and forming
a communication from one man-hole to the other; C is the pressure guage,

page_text: and D, the safety valve on the top of the boiler; E is a pipe at the bottom of
the boiler for discharging its contents, fitted with a suitable valve or gate F.
The boiler, if deemed necessary, may be provided with stirrers or agitators
driven by gearing.
.The mode of operating the boiler is as follows:-The man-heads are both
removed, and the boiler charged with the vegetable substances up to but not
above the man-hole c, c, and the lower man-head d then put on and secured.
The liquor or chemical solution of proper strength is next introduced in such
quantity that it will just cover the man-head d, completely submerging the
vegetable substances. The upper man-head 6 is then put on and secured, and the
necessary heat applied and continued until the contents of the boiler have been
sufficiently acted upon by the heated liquor or solution. The heat may be
obtained in the boiler either by steam admitted in a coil or otherwise, or by
the direct application of fire. If the latter mode of heating be adopted the
fire may be placed in a suitable car or travelling furnace H under the bottom
of the boiler, and removed after the boiler has been subjected to its action for
a suitable length of time. By opening the valve or gate H the contents of
the boiler are discharged by the pressure of steam into any suitable receiver.
Having described the nature of this Invention, and the manner of per-
forming the same, I declare that what I claim as the Invention to be protected
by the herein-before in part recited Letters Patent is, a boiler for dis-
integrating or pulping vegetable substances constructed substantially as herein
described, and operating substantially as herein set forth.
In witness whereof, I, the said William Clark, have hereunto set my
hand and seal, this Eighteenth day of August, in the year of our
Lord One thousand eight hundred and sixty-three.
Witness,
W. G. E. SWINNOCK,
53, Chancery Lane,
London.
W. CLARK. (LS.)