Year: 1888

page_text: Date of Application, 8th Feb., 1888
Complete Specification Left, 30th Oct., 1888
Complete Specification Accepted, 5th Feb., 1889
We, ROBERT MINTYRE, Iron und steel Forger, of 22 Inchinnan Road, in the town
and county of Renfrew, and HUGH MCINTYRE, Marine Surveyor, of 6 Oswald Street,
Glasgow, Lanarkshire, do hereby declare the nature of our invention, to be as
follows:-
This Invention has reference to and comprises cortain new or improved appliances
for being fitted to steam boiler furnaces to regulate and distribute a forced blast of
compressed air or steam and draw in atmospheric air; and which will be more simple
in construction and efficient in action than the appliances horetofore in use, for such
purposes. The improved appliances are also applicable for regulating and distributing
or deflecting a jet or jets of air to the cabins, holds, and other close parts of steam
ships and other vessels, or purposes.
The nature and novelty of this invention consist all as follows:-Under one
arrangement as applied to the furnace of a marine or other steam boiler, we bolt by a
flange to the front plate of the furnace flue closing in the ashpit, an angled or conoidal
hollow chamber, widening out in front with open end, to the centre of which we lead
a pipe or tube preferably from each side to bring compressed air or steam into a
lateral branch and central valve seat leading into the conoidal chamber and furnace.
The entering end of the said lateral branch and central valve seat would project within
the chamber and have a nipple or seat screwed on it with a regulating jam nut behind,
and have its front end formed of an inverted hollow conoidal shape. A horizontal
screw spindle working within a stuffing box on the outside, would project within this
seat part. The inner end of this spindle would have an invorted cone valve cast or
formed on it, working within the correspondingly shaped nipple seat. The size of
opening for the compressed air or steam would thus be regulated by the hand spindle
outside with hand wheel on it, moving and regulating the distance of the conical valve
from its seat according to the size of jet desired. The jet of air or steam would be
projected from the conoidal opening out towards and on to the angular sidos of the

page_text: chamber which leads into the furnace, and be deflected and distributed beneath the
fire bars to produce the forced blast. The loose fan or propeller may be mounted in
journal bearings either on one or two light cross bars in the open conical air induction
monthpiece; all in axial line with the conoidal forced air blast, so that the back end
of the spindle might in some cases he carried in a board bearing in the inner end of
the conoidal valve, which would preferably work through a light feathered eye in its
inlet seat, so as to maintain the conical valve truly cylindrical and concentric to
its conoidal, seat, which would insure the conoidal jet of compressed air or steam being
projected out equally all round the induction air tube. In some cases we may fit
these improved air or steam inlet regulating appliances to an angled or curved
projecting up pipe leading to the furnace ashpit and chamber, instead of direct on the
plate closing in the ashpit. The compressed air for this apparatus would require to bo
of a higher pressure than that got from fans or ordinary blowers, as say from 30
to 160 pounds to the square inch, so that either air or steam could be used, and the
compressed air would be obtained by making the main engines drive the air
compressors, and the steam when it is used, would be taken from a boiler, and
conducted to a main pipe under the steam boiler where the forced draught is to be
applied, and might be superheated before being led to the appliances and have branch
pipes leading from this main pipe to the new inlet regulating appliances fitted to each
furnace flue. A loose fan or propeller with radial vanes may in some cases be
mounted on a spindle in front of the conical valve to rotate by the force of the jet of
compressed air or steam acting on it and so induce atmospheric air to pass into the
furnace through the wide open end mouth of the cone along with the compressed air
or steam, the strength of the latter regulating the amount of air drawn in.
These new appliancos can also be used for regulating the supply of compressed air
to ventilate cabins, holds, or other close rooms on board ship in tropical or warın
climates, and be also applicable for ventilating warehouses, and other buildings or for
other purposes.
This new or improved combination of reverse conoidal nozzle apparatus and
corresponding spreading induction jets of high pressure air or steam, for drawing
and injecting or forcing large volumes of air into furnaces to produce forced draught
and combustion and air or other gases through chambers or places for other purposes
where such is required, although only described as fitted on each air inlet duct, is also
suitable for being fitted and applied on the eduction flues and conduits of such
furnaces and places for drawing and ejecting the waste gases or air therefrom, and
thus cause a forced or induced draught of fresh air through said furnaces or other
places where the apparatus was so fitted.

page_text: also Applicable for other Purposes.
ROBERT MCINTYRE 22 Inchinnan Road, Renfrew Iron Forger and HUGH MCINTYRE
6 Oswald Street Glasgow Marine Surveyor 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 reference to and comprises certain new or improved appliances
for being fitted to steam Boiler furnaces to regulate and distribute forced blast of
compressed air or steam, and draw in atmospheric air, and for regulating and
distributing or deflecting a jet or jets of air to the Cabins, Holds, and other parts of
steam ships and other vessels or purposes.
The nature and novelty of this Invention consists all as follows
Under ono arrangement as applied to the furnace of a marine or other steam boiler,
we bolt by a flange to the front plate of the furnace flue, closing in the ashpit. an
angled or conoidal hollow chamber, widening out in front with open end, A Fig. 1 to
the centre of which we lead a pipe b Fig. 1 & 2 or tube preferably from each side to
bring compressed air or steam into a lateral branch and central valve seat 1 Fig. 4,
leading into the conoidal chamber and furnace. The entering end of the said lateral
branch and central valve seat would project within the chamber, and have a nipple or
seat screwed on it, with a regulating jam uut behind, and have its front end formed of
an inverted hollow conoidal shape F Fig. 3. A horizontal screw E Fig. 3 spindle
working within a stuffing box on the outside, would project within this seat part.
The inner end of this spindle would have an inverted cone valve cast or formed on it
F Fig. 3, working within the correspondingly shaped nipple seat. The size of opening
for the compressed air or steam would thus be regulated by the hand spindle outside,
with hand wheel G Fig. 3 on it, moving and regulating the distance of the conical
valve from its seat according to the size of jet desired; or instead of cone valve, a
series of open jets can be arranged round an inverted cone seat, at an angle that will
project compressed air or steam to impinge on vanes of the fan in the direction of
their motion K Fig. 4, so as to give maximum velocity to fan with minimum amount
of compressed air or steam-this jet cone would be connected to an ordinary stop
valve, either inside of the induction air tube, or at any convenient part of the pipe
connections.
The jet of air or steam would be projected from the conoidal opening out towards
and on to the angular sides of the chamber which lends into the furnace, and be
deflected and distributed beneath the fire bars to produce the forced blast.
The loose fan or propeller L, Fig. 2 may be mounted in journal bearings, either on
one or two light crossbars M Fig. 1 in the open conical air induction mouthpiece; all
in axial line with the conoidal forced air blast, so that the back end of the spindle

page_text: might in some cases be carried in a broad bearing in the inner end of the conoidal
valve, which would preferably work through a light feather die in its inlet seat so as
to maintain the conical valve truly cylindrical and concentric to its conoidal seat,
which would ensure the conoidal jet of. compressed air or steam being projected out
equally all round the induction air tube. In some cases we may fit these improved
air or steam inlet regulating appliances to an angled or curved projecting up pipe
leading to the furnace ash pit and chamber instead of direct on the plate closing in
the ash pit. The compressed air, for this apparatus would require to bo of a higher
pressure than that got from fans or ordinary blowers, as, say from 30 to 60 pounds to
the square inch, so that either air or steam could be used, and the compressed air 1
would be obtained by making the main engines drive the air compressors, and the
steam when it is used, would be taken from a boiler, and conducted to a main pipe
under the steam boiler, where the force draught is to be applied, and might be super-
heated before being led to the appliances. and have branch pipes leading from this
main pipe to the new inlet, regulating appliances fitted to each furnace flue. A loose
fan or propeller, L Fig. 1 & 2 with radial vanes, may in some cases be mounted on a
spindle in front of the conical valve to rotate by the force of the jot of compressed air
or steam acting on it, and so induce atmospheric air to pass into the furnace through
the wide opon end mouth of the cone along with the compressed air or steam: the
strength of the latter regulating the amount of air drawn in.
These new appliances can also be used for regulating the supply of compressed air
to ventilate cabins, holds or other close rooms on board ship in tropical or warm
climates and be also applicable for ventilating warehouses and other buildings or for
other purposes.
The new or improved combination of reverse conoidal nozzle apparatus and corro-
sponding spreading induction jets of high pressure air or steam for drawing and
injecting or forcing large volumes of air into furnaces, to produce forced draught
and combustion; and air or other gases through chambors or places, for other
purposes, when such is required, although only described as fitted on each air
inlet duct is also suitable for being litted and applied on the eduction flues and
conduits of such furnaces and places for drawing and ejecting the waste gases or air
therefrom, and thus cause a forced or induced draught of fresh air through said
furnaces or other places where the apparatus was so fitted.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed wo declare that what we
'claim is
1. The mode of driving the air fan.
The fan of anulied inside the cavoidul tuba