Improved Apparatus for Preventing the Formation of Smoke and for Effecting Economy in the Consumption of Fuel.
Year: 1889

page_text: Date of Application, 7th Nov., 1889
Complete Specification Left, 18th July, 1890-Accepted, 23rd Aug., 1890
PROVISIONAL SPECIFICATION.
[Communicated from abroad by GEORGE WASHINGTON WILOOX, of St. Louis,
Missouri, United States of America.]
Improved Apparatus for Preventing the Formation of Smoke and
for Effecting Economy in the Consumption of Fuel.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co. Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows :-
This invention which relates to improved apparatus for preventing the formation of
smoke and for effecting economy in fuel is applicable to the furnaces of all kinds of
boilers, and generally to other furnaces such as are used in the arts and manufactures,
such for example as puddling hoating, or reheating furnaces, blowing, ball and forgo
furnaces, used in malleable iron works and rolling mills; melting, heating and ingot
furnaces, used in steel works, drying and firing furnaces used in clay and porcelain
works and others.
The invention consists in providing two or more tubes contained partly in the flues,
and partly in the fire box or furnace, the rear ends of which are open to the atmo-
sphere. These tubes are connected inside the firebox by a cross tube situated at the
upper part thereof. One or more small nozzles pointing towards the firebox ends of
the tubes are placed in each side tube, and these are connected by small pipes and
regulating valve to a steam pipe or direct to the boiler.
On the regulating valves being opened small jets of steam issue from the nozzles,
into the side tubes, and thus produce a current therein from their outer or rearward
open ends towards their front ends into the cross tube in the firebox.
The effect of these jets is to cause cold air to be drawn in from the outside atmo-
sphere, and projected in mixture with the steam through perforations in the front of
the cross-tubo into the upper part of the firebox, there to meet the smoke and
unburnt products of combustion rising up from tho feed in the grate bars.
To aid the discharge of mixed air and steam another steam pipe may be provided
extending across the front of the cross pipe, provided with jots leading into openings
in said cross-pipe. A regulating valve is applied to this stoam pipe for permitting a
second supply of steam to be admitted into the cross-pipe, the effect of which whon
used is to drive or project the mingled air and combustible gases to the extreme back
portion of the grate a point or distance which they might not reach otherwise.
Dated this 7th day of November 1889.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improved Apparatus for Preventing the Formation of Smoke and
for Effecting Economy in the Consumption of Fuel.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex 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 :-
My Invention relates to improved apparatus for preventing the formation of smoke
and for effecting economy in fuel. It is applicable to the furnaces of all kinds of

page_text: boilers, for example, stationary boilers, the boilers of locomotive engines, marine
boilers, the boilers of what are known as portable engines, and is also adapted for
furnaces generally such as are used in the manufacturing arts or trades wherein coal
is burned.
As instances of such furnaces may be mentioned-puddling, hoating, re-heating,
blooming and forge furnaces, in malleable iron works, forges and rolling mills,
melting, heating, and ingot furnaces, in steel works, drying and firing furnaces used
in clay and porcelain works and others.
Fig. 1 is a side elevation partly in longitudinal section of a stationary boiler showing
my improved apparatus applied thereto.
Fig. 2 is a plan of the same, and Fig. 3 a horizontal section on a larger scale than
Figs. 1 and 2.
In these Figures the boiler A, is of the ordinary cylindrical, tubular return fluc
type, and is carried in an ordinary brick work setting B-the return tube discharging
into the smoke-box C. In the upper part of each of the side flues D, then is placed
a horizontal pipe E, the rear end of which is open to the atmosphere. From the
steam drum F, or from other part of the boiler a little quantity of steam is led off
by the pipes G, G, (which are furnished with regulating cocks or valvos not shown
in the drawing) into each tube E, wherein such steam is discharged forwards, or
towards the front of the boiler. The effect of this discharge of steam in the form
of very small jets is to create a draught in oach pipe E, towards the fire-place H,
at the same drawing in cold air from the outside atinosphere through the rear end
of the pipes E. As this air progresses forwards through the pipes E, it becomes
continually raised in temperature until it reaches the transverse horizontal pipo I, by
or through the openings J in which it is discharged into the upper part of the
furnace or fire-place K, the steam which has carried the hot air to this transverse
pipo I, being also discharged mixed with it, in a highly heated state. The hot air and
steam commingle with the ascending flame and products of combustion from the
fuel upon the firegrate becoming broken up or dissociated, and uniting with the
smoke and other portions of unburned fuel burn with them, thus generating additional
heat in the furnace and flues, and preventing the smoke from escaping as black and
unburned smoke. For the purpose of rendering the notion of my apparatus more
positive at all times I apply another steam pipe L, and nozzles M, which discharge
stoam into the transverse pipe I.
From the example which I have herein described and shown upon the annexed
drawings, it will be understood how my improved apparatus is or may be applied to
other furnaces.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed, as communicated to mo
by my foreign Correspondent I declare that what 1 claim is :-
First. The general arrangement and combination of parts constituting the improved
apparatus for preventing the formation of smoke and for effecting economy in fuel
substantially as herein before described and shown upon the annexed sheets of
drawing.
Second. The smoke-preventing and fuel economising apparatus for boilers and
other furnaces wherein air is drawn by one or more jots of steam through one or
more pipes arranged in the upper part of the flues and above the fuel on the grate,
this air being thence forced mixed with the issuing jets of steam through a pipo
situated transversely above the fuel and in such manner, that the hot air and steam

page_text: are discharged into & amongst the flame, gas and smoke issuing from the grate, and
burnt therewith in such manner that all heat is developed in the furnace and fluos and
no unburnt fuel escapes, substantially as heretofore described.
Dated this 18th day of July One thousand eight hundred and ninate
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.