Improvements in Apparatus for Injecting Air, Gas, Oil, or other Fluids into Furnaces and Fires, for the Purposes of Increasing Draught, Reducing Smoke and Assisting Combustion.
Year: 1887

page_text: Date of Application, 27th Sept., 1887
Complete Left, 5th Nov., 1887
Complete Accepted, 6th Dec., 1887
Improvements in Apparatus for Injecting Air, Gas, Oil, or other
Fluids into Furnaces and Fires, for the Purposes of Increasing
Draught, Reducing Smoke, and Assisting Combustion.
We HENRY WILSON & ALFRED WILSON Engineers of Stockton on Tees in the
County of Durham do hereby declare the nature of this invention to be as follows:-
An improved method of applying air gas or other fluid under pressure into furnaces
& fires for increasing draught reducing smoke & assisting or forcing combustion
& consists in the application of a series of annular Jets to the openings into the ash
pits & over the fires of furnaces for various purposes principally in connection with
steam boilers intended as an addition to & improvement on the arrangements
patented in 1886 No. 15,787-the jets being so arranged that in addition to the air
injected under pressure into the fires, the natural draught is increased by the velocity
& consequent draw of the air issuing from the annular orifices of the Jets.
Dated this 27th day of September 1887.
HENRY WILSON.
ALFRED WILSON.

page_text: Improvements in Apparatus for Injecting Air, Gas, Oil, or other
Fluids into Furnaces and Fires, for the Purposes of Increasing
Draught, Reducing Smoke, and Assisting Combustion.
We, HENRY WILSON and ALFRED WILSON, both of the Phoenix Works, Stockton-
on-Tees, County of Durham, Engineers 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 :-
The purpose of this Invention is to facilitate the application of various forms of jets
and conductors for the injection of air, gas, water or other fluids into the ash-pits of
steam boilers, dyer's vats, brewer's coppers and the like, and is intended as an addition
to and improvement on the arrangements patented by the said Henry Wilson in 1886,
Patent No. 15787.
The first part of these improvements consists of a pipe of iron, copper or other
suitable material which is attached to the boiler or furnace front by means of a swivel
joint, or it may
be fixed permanently to the boiler front or ash-pit by any suitable
method of fixing, preferably by hinged screw toggles, the connection of the channel
conveying the air or other fluid being so arranged that on swinging back, sliding out
of position, or in any way removing the jets from the point of action the supply of air
or other fluid is shut off. Attached to this pipe are various forms and kinds of jets
on the "Argand" or "Injector" principle and arranged so that they can be focussed
to any part of the fire underneath the grate bars, or such other position as may be
required.
The drawings which accompany this Specification explain the formation of the
various jets and modes of application to boilers and furnace fronts.
Drawing 1 shews the swivelled attachment D to furnace front, with an oval
"Argand" Jet C, secured to it by gimbals at each end to allow for setting in any
required position to suit the requirements of the fire. Fig. 2 shews jet in two parts
to permit of setting in various ways.
Drawing 2 shews the "Argand" jet A attached to the swivelled branch by an
universal swivel joint so as to admit of greater variations of position than is practicable
with the gimbals.
Drawings 3 and 4 shew the mode of attaching a number of jets to the swivel branch.
Fig. 2 shews a jet or series of jets with swivel attachments and means of discon-
necting.
Drawing 5 shews jet in two halves for convenience in opening. Fig. 2 shews a
series of "knife"
jets.
Having now particularly described and ascertained the nature of our said Invention
and in what manner the same is to be performed, we declare that what we
claim is :-
The attachment of jets of various kinds in the manners shewn, to convey currents

page_text: of air, gas or other fluids into the ash-pits of boiler furnaces and also fires for Dyers,
Brewers Vats and like purposes, to supply sufficient air under the fire bars to promote
combustion without the assistance of high chimneys, and we claim for this arrange-
ment and application the more uniform diffusion of the heat over the whole surface of
the boiler or vat exposed to its influence, because of the pressure, and consequent
greater density of the heated gases, obtained by this method of applying air in com-
parison with the attenuation caused by draught of high chimneys which act as suckers
to draw away the heated gases from the sphere of their greatest value-the heating
surfaces of the boiler or vat thereby attenuating the volume of heat and drawing away
an undue proportion thereof our Invention being designed to counteract this evil by
supplying a sufficient quantity of air at such a pressure as will fully support and
assist combustion and maintain a moderate pressure of uniformly heated gases on all
parts of the heating surfaces equally, and by contracting the outlet for waste gases to
such an extent as will only perinit the escape of what can be of no further use-all of
which we claim.
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