provements in Smoke Consuming Appliance
Year: 1895

page_text: COMPLETE DI MUITIVATION
Improvements in Smoke Consuming Appliance
J, WILLIAM MCGI ASHAN, of 32 Commercial Street, I eith, in the County of
Midlothian, North Britain, Engineer, 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
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This invention relates to improvements in smoke consuming appliance for the
furnaces of land, marine and other boilers and consists in the employment of an
auxiliary bridge built behind the ordinary bridge, the space between the budges
being supplied with a spray of heated gas oil and fresh air currents in such a
manner as to efficiently consume the smoke during its passage th ough the flues, and
by so doing augment the power of the boiler
Figure I is a longitudinal section and Figure II a front elevation shown partly
in section of an ordinary duplex furnace boiler having my improvements attached
Referring to the said drawings I construct an auxiliary bridge A behind the
ordinary bridge B, there being a suitable space left between the said bridges
I also form or provide the front bridge B with an air opening C having an
adjustable shutter and operating arrangement C, as shown, so as to enable the
current of air to be regulated at will I also supply a spray or jet of cheap gas oil
into the space between the bridges, said oil being supplied, by means of pipes
or tubes D, from a tank or reservoir E mounted in proximity, and above the level
of the furnace The said pipes D are supplied with regulating cocks, valves or
taps and are led along under the furnace bars, as shown, and so permit of the oil
being beated before it reaches the perforated nozzle d' of the said pipes D
In order to enable the said pipes and especially the perforated end d¹ to be
cleaned I connect them to the boiler by means of steam pipe having a stop cock
or valve fattached
The action of the foregoing apparatus is as follows -The oil is allowed to run
from the tank E, by gravity, down the pipes D to the nozzle d', where it mixes with
the supply of air from the opening C, as also the products of combustion from the
furnace and suddenly bursts into flame in the space between the bridges A and B
and thence along the flue and consuming all the smoke, before it can escape, thereby
augmenting the power of the boiler and at the same time effecting a saving
of fuel
I prefer to provide the oil tank with a filtering sieve or sieves mounted a little
below its top end, so as to drain the oil before it passes to the pipes and thus prevent
the tendency of clogging
If desired I may also use a little steam along with the oil
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is
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1st The general arrangement, construction and combination of the parts,
Constituting my smoke consuming appliance for the furnaces of land, marine and
other boilers substantially as hereinbefore described and shown in the accompanying
drawings
2nd In smoke consuming appliance, the arrangement whereby a jet or spray of
oil is supplied to and cau ed to burn with the products of combustion from the
furnace, for consuming the smoke and augmenting the boiler power, substantially
as herein before described and shown in the accompanying drawings

page_text: 3rd In smoke consuming appliance, the arrangement of the oil pipe D having
perforated nozzle d', placed in an air space at the back of the furnace bridge B
formed by the auxiliary bridge A, said air space being supplied with a current of
air by the regulating shutter C, substantially as herein before described, and shown
in the accompanying drawings
4th In smoke consuming appliance, the steam pipe connection F, whereby the
oil pipe D may be readily cleaned or steam be used with the oil, substantially as
herein before described and shown in the accompanying drawings
Dated this 30th day of April 1895
JOHNSONS,
115, St Vincent Street, Glasgow, Applicant's Agents