IMPROVEMENTS IN AND RELATING TO STEAM BOILERS
Year: 1879

page_text: PROVISIONAL SPECIFICATION left by James Taylor at the Office of the
Commissioners of Patents on the 25th April-1879.
JAMES TAYLOR, of Grangefield, Oxton, Birkenhead, in the County of Chester.
"IMPROVEMENTS IN AND RELATING TO STEAM BOILERS."
My Invention relates to certain improvements on what are known as vertical
boilers, and horizontal, cylindrical, and other boilers, and has for its object the
obtainment of a large heating surface combined with accessability of parts and
strength, together with a thorough circulation of the water in the boiler; the
construction of the furnace and combustion chamber being of the most approved
form for the economical consumption of fuel.
First. In a vertical cylindrical dome topped boiler my Invention consists in a
particular and novel arrangement of horizontal or slightly inclined or diagonal
tubes lending from the smoke box (which is formed in front of and attached to the
boiler shell) to the combustion chamber, which is formed inside the boiler. Tho
point of novelty of this part of my Invention consists in making the shell of the
boiler itself to serve as the front tube plate, the back tube plate being formed by
the inside or front plate of the combustion chamber. The furnace is high, with a
dome top, and leads into an ascending combustion chamber in the shell of the
boiler, from which combustion chamber the said horizontal or inclined tubes convey
the products of combustion to the smoke box.
Second. In a vertical cylindrical dome topped boiler as described under the first
head or other shaped boiler, my Invention consists in connecting the water space
above the crown of the furnace with the water space at the bottom aud sides of the
boiler by a diagonal tube, tapered or straight, descending from the crown of the
furnace to the lower water space, and crossing the furnace where the furnace
developpes into the combustion chamber.
Third. In a vertical cylindrical dome shaped boiler as described under the first
head or in any other class of boiler, my Invention consists in forming the front
tube plate, or both the front and back tube plate, of corrugated iron, or steel,
or other suitable metal, the corrugations being of that class known as step
corrugations. This construction ensures great strength and gives a large additional
heating surface, the tubes descending at an incline from one tube plate to the other,
and being set into the steps formed by the corrugations on the plates. Any of the
tubes as desired being provided with nuts or other equivalent, and forming stay
tubes. I would have it understood that both tube plates may be formed with step

page_text: corrugations, or either of the tube plates may be so corrugated and the other plain.
I would also bave it understood that the front corrugated tube plate may form part
of the shell of the boiler, or be an independent tube plate.
Fourth. My Invention further consists in constructing horizontal cylindrical
boilers with the improvements described under the second and third heads.
I would have it understood that I am aware that vertical cylindrical boilers have
been constructed prior to my Invention with horizontal or inclined tubes con-
necting a combustion chamber with a smoke box built on the outside of the boiler,
and I would here state that I myself have constructed boilers of such form many
years prior to this my Invention. I would also state that I am aware that Letters
Patent were granted to Edward Crompton, of Liverpool, and James Taylor
Cochran, of Birkenhead, on 25th February 1878, No. 770, for such a construction of
boiler. The distinction between these said boilers and my present Invention is,―
In such boilers a distinct and separate plate was and is used as the front tube
plate, whereas in this my present Invention the shell of the boiler itself forms the
tube plate.