IMPROVEMENTS IN THE CONSTRUCTION OF BOILERS AND FURNACES FOR HEATING GREENHOUSES OR OTHER BUILDINGS BY HOT WATER
Year: 1882

page_text: LETTERS PATENT to James Parkinson, of Caton, in the County of Lancaster,
for an Invention of “IMPROVEMENTS IN THE CONSTRUCTION OF BOILERS
AND FURNACES FOR HEATING GREENHOUSES OR OTHER BUILDINGS BY HOT
WATER"
PROVISIONAL SPECIFICATION left by the said James Parkinson at the
Office of the Commissioners of Patents on the 31st January 1882,
JAMES PARKINSON of Caton in the County of Lancaster.
"IMPROVEMENTS IN
THE CONSTRUCTION OF BOILERS AND FURNACES FOR HEATING GREENHOUSES OR
OTHER BUILDINGS BY HOT WATER."
The boiler is made with a shallow water space all round that is on both sides,
front, back and top. The furnace extends from the front of the water space at the
back. The crown of the furnace is an arched water shelf connected to the front
and side water spaces by suitable openings but stopping short of the back water
space so as to leave a communication from the furnace to the fire space above.
Between the crown of the furnace and the top of the boiler which is similarly
arched are three other arched water shelves, the central one (like the crown and
the top) being connected to the front water space and stopping short of the back
water space whilst the two others are connected to the back water space and stop
short of the front one.
The top water space has an opening through it at the back leading to the
chimney so that the flames and heated gases in passing from the furnace pass in a
serpentine form between these water shelves and no heat is wasted.
The flow pipe for the hot water passes vertically through the centre of the
fame passages or flues and communicates with the centre of each of the water
shelves.
The return pipe is connected to either the back or one of the side water spaces
near to the bottom of the same.
Soot doors are provided in the front opposite to each of the fire spaces or flues
between the water shelves so as to facilitate the cleaning out thereof when
required.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Parkinson in the Great Seal Patent Office on the 31st July
1882.
JAMES PARKINSON of Caton in the County of Lancaster. "IMPROVEMENTS IN
THE CONSTRUCTION OF BOILERS AND FURNACES FOR HEATING GREENHOUSES OR
OTHER BUILDINGS BY HOT WATER."
According to iny Invention the boiler is made with a shallow water space all
round that is on both sides front back and top. The furnace extends from the
front of water space at the back. The crown of the furnace is an arched water
shelf connected to the front and side water spaces by suitable openings, but
stopping short of the back water space so as to leave a communication from the
furnace to the fire space above. Between the crown of the furnace and the top of
the boiler, which is similarly arched are three otlier arched water shelves, the
central one like the crown and the top, being connected to the front water space
and stopping short of the back water space whilst the two others are connected to
the back water space and stop short of the front one. The top water space has an
opening through it at the back leading to the chimney so that the flames and
heated gases in passing from the furnace, pass in a serpentine form between these
water shelves and no heat is wasted. The flow pipe for the hot water passes
vertically through the centre of the flame passages or flues and communicates with
the centre of each of the water shelves. The return pipe is connected to either the
back or one of the said water spaces near to the bottom of the same. Soot doors
are provided in the front opposite to each of the fire spaces or flues between the
water shelves so as to facilitato the cleaning out thereof when required.
Having thus far described the nature of my Invention and incidentally intimated
in what manner the same is to be performed I will now proceed by reference to the
accompanying Drawings to further and particularly describe and ascertain in what
manner the samo is to be performed or carried out in practice.
Fig. 4 isometrical view.
Fig. 5 plan.
A, flow pipe, B, smoke hole C, openings through which the water shelves or
spaces D are supplied from the back and front plates of boiler, said back and
front plates having corresponding holes or openings. The said back and
front plates are supplied with water through holes C (which like openings C
are preferably of oval shape) at the bottoin corners of fire box E. On cach
side of fire box are return pipes F as shown, whereby the water returns
on each side of fire box at the lowest point and enters into the back and front
plates through the holes or openings C and the corresponding holes as before
mentioned in said back and front plates. And the water enters similarly into each
water shelf in succession at the four corners thereof by means of holes corresponding
with those marked C. The flow pipe is in the centre and is cast on to top of fire
box and provided with flanges at each of the water spaces, so as to be bolted up
and jointed, the joints being packed with rings of asbestos. The openings C are
provided with sunk margins around same to receive asbestos rings and drawn up
tight and kept in place by the bolts through lugs as shown. Figs. 2 and 4 show

page_text: soot holes or doors G G which are provided to each of the fire spaces or flues
between the water shelves, to facilitate the cleaning of said flues. The fire box is
cast so as to be say 3 inches short of the arch at the back thereof, so that the
flames may rise on to the top, and the water shelves or spaces D D aro mado
shorter at the front and back ends alternately for the same purpose, the crown
water shelf being provided with the opening B which is say 10 inches square for
smoke to go through into the chimney. The flue or fire spaces between water
shelves D are say three inches in height. By this arrangement it is evident that
the whole interior of the boiler is water way and the water never travels more
than once over the same spot in the course of its circulation. The flow pipe is in
the centre of flame as shown, and consequently acts like a lift pump on the water
supplied to cach of the water shelves or spaces D the flames coming in contact with
it at every point. For making the joints in flow pipe lugs may be cast on the fire
box and water shelves, so that they can be drawn tightly together by bolts through
said lugs all the water shelves being made in the same way with flow pipe cast on
under side of each with flanges. In top of fire box is an opening or circular hole
with a ring cast round it, between which ring and the hole is placed asbestos
packing as before mentioned on which the flow pipe flange rests, the ring
preventing said packing getting out of place.
Having now particularly described and ascertained the nature of the said
Invention and in what manner same is to be performed I hereby declare that I
claim the Invention of "Improvements in the Construction of Boilers and Furnaces
for Heating Greenhouses or other Buildings by Hot Water" substantially as herein-
before set forth, and described and illustrated by the accompanying Drawings in
which the water shelves arranged as hereinbefore set forth are important and
peculiar features.
In witness whereof I the said James Parkinson have hereunto set my
hand and seal this 28th day of July One thousand eight hundred and
THOMAS SIMPSON,
45 Church St., Preston,
Witness.
¡ JAMES PARKINSON. (Ls.)
45 Curwen St.
Ribbleton Lano
Preston.