Improvements in Steam Boilers.
Year: 1892

page_text: Date of Application, 16th Nov., 1892
Complete Specification Left, 16th Aug., 1893-Accepted, 16th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
I, PHILIP VALLANCE of The Court House, Cootham in the County of Sussex,
Gentleman, do hereby declare the nature of this invention to be as follows :--
This invention has for its object improvements in steam boilers.
In the working of steam boilers there is at the present time a considerable waste
of fuel arising from the escape of the combustion gases into the chimney at an
unduly high temperature. I lessen this evil by dividing the water space of the
boiler by means of several transverse partitions so as to form separate water
chambers which however all communicate with a steam space above the water and
which is common to all the chambers. The feed water is admitted to the water
chamber which is most remote from the fire and when this chamber is full the water
flows over the partition separating this chamber from the next and so the feed
water flows from chamber to chamber until it reaches the hotter or fire end of the
boiler.
The boiler is provided with internal flues or tubes which traverse all the chambers
and the gases before they enter the chimney have to pass through that portion of
the flues which is surrounded by the comparatively cold feed which has recently
entered the boiler. Thus the hot gases are more effectually cooled than heretofore,
before they escape into the chimney.
Preferably 1 make the partitions of different heights and progressively lower and
lower as the hotter end of the boiler is approached.
I so arrange that the water in flowing over the partitions is exposed as little as
may be to contact with the steam.
Dated the 16th day of November 1892.
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
I, PHILIP VALLANCE, of The Court House, Cootham in the County of Sussex,
Gentleman, do hereby declare the nature of this invention and in what manner
the same is to be performed to be particularly described and ascertained in and
by the following statement :-
This invention has for its object improvements in steam boilers.
In the working of steam boilers there is at the present time a considerable waste
of fuel arising from the escape of the combustion gases into the chimney at an
unduly high temperature. I lessen this evil by dividing the water space of the
boiler by means of several transverse partitions so as to form separate water
chambers. The feed water is admitted to the water chamber which is most remote
from the fire and when this chamber is full the water flows over the partition
separating this chamber from the next and so the feed water flows from chamber to
chamber until it reaches the hotter or fire end of the boiler.
The boiler is provided with internal flues or tubes which traverse all the chambers
and the gases before they enter the chimney have to pass through that portion of
the flues which is surrounded by the comparatively cold feed which has recently
entered the boiler. Thus the hot gases are more effectually cooled than heretofore,
before they escape into the chimney.
I make the partitions of wood, each having holes for the fire tubes considerably
[PQ31

page_text: larger than the fire tubes which go through them, and on the side of each partition
nearest the chimney is fixed a short tube of metal the size of the hole through the
partition and as long as half the space between the partitions, so that the feed water
may pass through these tubes into the next pocket and take up some of the heat
from the fire tube in passing along.
•
In order that my said invention may be fully understood and readily carried into
effect I will proceed to describe the drawing annexed.
DESCRIPTION OF THE DRAWING.
The drawing shows a longitudinal section of a boiler of the locomotive type; in
accordance with my invention the water space is divided by transverse partitions
into separate compartments. a is the shell of the boiler. b is the fire box. c c are
the flue tubes and d the smoke box which communicates with the chimney.
· Six partitions are shown in this boiler; they are marked e¹ e e e e and e* but
the number may be varied. ff are short tubes fixed into these partitions; the flue
tubes c c pass through them. The feed water enters at a into the compartment
marked "1 where it comes in contact with the flue tubes c c at their cooler ends.
By abstracting heat from the flue tubes the water becomes warm and afterwards it
passes out by the short tubes ff, and enters the compartment "2" there the water
takes up additional heat from the flue tubes and afterwards passes out by the space
around the tubes c and between them and the interior of the tubes f. So ultimately
the water reaches the fire box end of the boiler where mainly the steam is generated.
The steam occupies the upper part of the boiler and to prevent the hot water
coming in contact with the cooler water in the compartments 1, 2 3 &c. these
compartments have covers gg which are all under the level of the water in the
boiler. The dotted line h indicates the water level.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A boiler divided into compartments by partitions e¹ e and the like and with
flue tubes passing through the said compartments and with arrangements for
admitting the feed water to a compartment remote from the furnace and for per-
mitting it to pass from compartment to compartment towards the furnace or hotter
end of the boiler substantially as described.
2. The improvements in steam boilers substantially as described and illustrated
by the annexed drawing.
Dated this 10th dex of Auenot 1803
PHILIP VALLANCE.