AN IMPROVED STEAM GENERATOR, SPECIALLY ADAPTED FOR HORTICULTURAL PURPOSES, BUT ALSO USEFUL FOR OTHER PURPOSES
Year: 1864

page_text: LETTERS PATENT to Henry Barwell, of Colney Hatch, in the County of
Middlesex, Gentleman, for the Invention of "AN IMPROVED STEAM
GENERATOR, SPECIALLY ADAPTED FOR HORTICULTURAL PURPOSES, BUT ALSO
USEFUL FOR OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said Henry Barwell at the
Office of the Commissioners of Patents, with bis Petition, on the 29th
February 1864.
I, HENRY BARWELL, of Colney Hatch, in the County of Middlesex, Gentle-
man, do hereby declare the nature of the said Invention for "AN IMPROVED
STEAM GENERATOR, SPECIALLY ADAPTED FOR HORTICULTURAL PURPOSES, BUT ALSO
USEFUL FOR OTHER PURPOSES," to be as follows:-
This Invention consists in compact steam generating apparatus, so arranged
that it can be mounted upon wheels (to facilitate transport from place to
place), with a nozzle and tap (or their equivalents), to which steam piping
(usually flexible) may be connected when the steam is desired to be applied to
flower beds in pipes or otherwise; or, dispensing with the said piping, a jet of
steain may be obtained from the said nozzle (or equivalents) and used as
occasion may require. I at present prefer to adopt the following arrangement.
of details:-Within an outer case (preferred to be mounted upon wheels for

page_text: facility of transport,) which case should be of metal, I have at the lower part
thereof a fire-grate surrounded by the boiler (except where the fire door tube
passes through it), the said fire-grate having hollow bars or water tubes.
Above or next to the boiler is a steam chamber, through which the furnace or
heat and smoke shaft is continued, into which chamber steam is led by a pipe
or duct, the steam chamber having at the top or other point an aperture or
duct, to which can be fixed one end of a steam coil, which passes through the
furnace or heat and smoke shaft, the other end having the nozzle or steam jet.
On or next to the steam chamber is the supply cistern, provided with ball, tap,
and adjuncts. The furnace and heat shaft terminates outside the outer case
in a smoke chimney. There is also an alarm plug to let off steam, a steam
whistle, and other adjuncts.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Henry Barwell in the Great Seal Patent Office on the 29th
August 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
BARWELL, of Colney Hatch, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-ninth day of February, in the year of our Lord
One thousand eight hundred and sixty-four, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Henry Barwell, Her special licence that I, the said Henry Barwell, my
executors; administrators, and assigns, or such others as I, the said Henry
Barwell, my executors, administrators, and assigns, should at any time agree
with, and no others, from time to time and at all times thereafter 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 IMPROVED STEAM GENERATOR,
SPECIALLY ADAPTED FOR HORTICULTURAL PURPOSES, BUT ALSO USEFUL FOR OTHER
PURPOSES," upon the condition (amongst others) that I, the said Henry Barwell,
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 per-
formed, 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.

page_text: NOW KNOW YE, that I, the said Henry Barwell, do hereby declare the
nature of my said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
that is to say:-
This Invention consists in a compact steam generating apparatus of any
convenient shape, so arranged that it can be mounted upon wheels, in order to
facilitate transport. from place to place, and fitted with a cock and nozzle, or
other equivalent apparatus to which steam piping (usually flexible) may be
connected when it is desired to apply the steam to flower and fruit beds, and
borders in forcing houses, or in the open air, through pipes or otherwise; or
by.removing the said piping a jet of steam may be obtained from the above-
mentioned nozzle or other equivalent apparatus, and used as occasion may
require. I prefer to adopt the following arrangement of details, namely:-
Within an outer case which forms the boiler, and which should be constructed
of iron, copper, or other suitable metal, I have at its lower end a fire-place
furnished. with fire-bars and closed. with a door. This fire-place is surrounded
by the boiler, except at the fire door, where entrance is obtained to the fire-
grate. The chimney flue passes directly up through the centre of the water.
and steam space of the afore-named case or boiler, and may be carried to any
convenient height, in order to give sufficient draught to the fire in the. fire-
place. From the top of the steam space, and passing through the side of the
aforesaid.boiler. or case at any convenient point in the circumference, I conduct
a pipe to the outside of the said case, and passing up over the top I cause it
to enter the chimney flue, and after describing a coil or spiral within the said
chimney flue it turns up and comes out at any other convenient point, the end
thereof being furnished with a cock and.nozzle, or similar equivalent apparatus
to regulate the flow and obtain a jet of steam. To this aforesaid nozzle or
other equivalent apparatus flexible or other. suitable tubing may be attached,
so as to conduct the steam in any required direction. On the top of the.
boiler or case I provide a cistern to contain cold water for the supply of the
boiler below, which said cistern should be fitted with a safety valve to prevent
explosion from the heating of the water by being placed on the top of the
boiler. A safety and vacuum valve should be fitted to the aforesaid boiler, as
also a water guage, blow-off cock, and steam whistle. To prevent radiation
the whole may be enclosed in a felt and matchwood casing, and mounted upon
wheels, and furnished with handles to facilitate transport from place to place.
My said Invention may be applied to heating dwelling-houses, warming
cattle sheds, steaming cattle food, for cooking purposes, and in other cases
where a continuous jet of steam can be used with advantage.

page_text: In order to explain my said Invention as completely as possible, I now
proceed to describe the best means I am acquainted with for carrying the
same into practical effect, reference being had to the illustrative Sheet of
Drawings accompanying these Presents, and to the numeral figures and letters
of reference marked thereon respectively, as follows:―
Figure 1 represents a vertical section of my improved machine, taken
through about the centro thereof; Figure 2 represents an elevation of my
improved machine.
A, A, represents the boiler and cistern, the exact position of the cistern
being shown in Figure 1; B is a glass water guage, to shew the height of the
water in the boiler; C is a blow-off cock, situated near the bottom of the
boiler, to be used when it is necessary to remove the water from the boiler;
D is a cock to the supply pipe M, to convey the water into the boiler from the
cistern at the top; the said pipe should be introduced into the boiler at a point
below that at which it may reasonably be expected that the water will stand;
E is a steam jet pipe, also furnished with a cock, whereby waste steam may
be blown into the cistern, and to establish an equilibrium, so as to permit of
the action of the pipe M, or to warm the water in the cistern S before being
passed into the boiler through the pipe M; F is an air cock; G is a steam
whistle; His a steam cock to the superheater; J is a feed cock, whereby
water may be supplied to the cistern S; K, K, are the wheels upon which
my improved machine is mounted, and L is the handle whereby it may be
wheeled from place to place; Y is a standard for support; N is the super-
heating coil entering the chimney flue at any point a, and after describing a
spiral curve passing out at any opposite point b; the extremity of this pipe or
coil of pipe is furnished with a tap c and nozzle d; O, Figure 2, is the furnace
door, and T is the fire-grate, at the bottom of which are the fire-bars e', e³, e³, e¹,
&c.; P.is a hinge, to allow the chimney to be removed or laid on its side, so
as to be out of the way.

page_text: Horticultural Purposes, but also Useful for other Purposes," together with
the best means I am acquainted with for carrying the same into practical
effect, I would remark in conclusion, that I hereby declare my Invention to
consist in the portability and general combination of parts above described
and represented, for the purposes above stated.
In witness whereof, I, the said Henry Barwell, have hereunto set my
hand and seal, this Twenty-ninth day of August, in the year of our
Lord One thousand eight hundred and sixty-four.
HENRY BARWELL. (L.S.)
Witness,
CHARLES STUART BAKER,
Clerk to the General Patent Company, Limited,
71, Fleet Street, Agents.