Improvements in Apparatus for Preventing Smoke in Steam-boiler and other Furnaces.
Year: 1898

page_text: Date of Application, 1st Nov., 1898-Accepted, 7th Jan., 1899
-
[Communicated from abroad by WILLIAM RILEY MILLS, of Jackson, Michigan,
United States of America.]
Improvements in Apparatus for Preventing Smoke in Steam-boiler
and other Furnaces.
I, DAVID YOUNG, Patent Agent, of the Firm of D. Young & Co., of 11 and 12,
Southampton Buildings, London, W.C., do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:―
My invention has relation to apparatus for preventing smoke in steam-boiler
and other furnaces.
My object is to provide a device of this character, which by reason of its ability
to produce perfect combustion in the boiler furnace, will overcome and prevent
the generation and emission of smoke.
a result
It is also my purpose to provide a device by means of which the necessary
amount of atmospheric air will be proportionately admitted to the furnace as is
required, and disposed of, with relation to the fire so as to continually provide a
uniform quantity of oxygen to the furnace fire at the location where it is needed,
thereby maintaining a uniform heat, without causing smoke, and as
keeping the steam at a constant pressure. Another object of my invention is
to provide a device, which may be readily attached to and detached from a furnace,
without necessitating any change in the wall of the furnace, and finally, my
object is to provide a device which will be cheap to manufacture, and durable and
efficient in use.
Referring to the drawings forming a part of this specification-
Fig. 1 is a perspective view of my device, showing it applied to a furnace;
Fig. 2 is a sectional view of the same, showing the draft shut off;
Fig. 3 is an end view of the rotary drum;
Fig. 4 is a sectional elevation, showing the draft "full on," and
Fig. 5 is a rear elevation of my invention.
In the drawings, 1 indicates a furnace wall, of any well known construction,
and 2 the usual opening in the furnace-front, to which is hinged at 3, my smoko
preventor, having a handle 4 and catch 5.
A steam-pipe 6 from the boiler, discharges through short nozzles 7, jets of
steam over the fire for a purpose which will hereinafter appear.
The door 8 of my device is provided with a liner 9, cut away for the reception.
of the rotary damper 10, which is journaled therein at 11. This cut away
portion is hollow, and is provided with air ducts or flues 13, which communicate
with the upper air receptacle 14 of the said liner. It will be noted that the
bottom 15 of the upper portion of the liner is provided with a series of perfora-
tions 16, whose use will later become evident. The top of the door is provided with
a register 17, whose movement may be controlled by the finger 18.

page_text: As before stated the rotary damper 10 is journaled in the sides 19 of the door,
and comprises two heads 20 and 21, to which are securely attached by any
suitable means, air partitions 22, said' partitions being bent so as to form angular
air passages or ducts 23, 24, 25, 26.
It will be observed that the heads 20 and 21 have each an angular section 27
removed or cut away, while the central partition 22" has secured to its outer face,
an operating lever 28, having a pawl 29 adapted to engage in notches 30 of a
segmental rack 31, which is bolted at 32 to the front face of the door.
An apron 33 and bottom piece 34, form parts of a casing for the rotary damper,
as is plainly shown in Fig. 2 of the drawings.
In use the jet or jets 7 are allowed to discharge steam into the fire box, as
required, while the admission of the air necessary to insure perfect combustion,
is controlled by the operating lever and the segmental rack hereinbefore alluded to.
By raising the lever to its full limit, as shown in Fig. 2, it is evident that air
will not be admitted to the fire box except through the register 17 and perfora-
tions 16 and the channels 23 and 24, while by lowering the lever to the extremity
of the segmental rack, as shown in Fig. 4, air is admitted in full quantity to the
fire box, the angular partitions 22, serving to deflect the air in such manner that
it will pass over the fire to the point required, thereby supplying a proper
quantity of oxygen at that location, and causing perfect combustion, while at the
same time, preventing the escape of unconsumed particles of carbon, smoke,
gases and other products of combustion.
Air is admitted to the liner by means of the register 17, as may be required,
the draft from the furnace, causing the same to pass out through the ducts 13,
and as a result keeping the back of the door, as well as the damper and its
sections cool, thereby preventing warping or cracking of that portion of the
device. Air will also pass from the receptacle 14 through the perforations 16
into the angular space above the channel 23.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is -
First. A smoke-preventer for steam-boiler and other furnaces, wherein a rotary
damper having a series of air-ducts is journalled in a
furnace-front and is provided with means for turning it about its axis, substan-
casing attached to the
tially as hereinbefore described and for the purpose specified.
Second. A smoke-preventer for steam-boiler and other furnaces, comprising a
casing, a liner therein, a rotary damper in the said casing having a series of
angular air-ducts, an air-chamber above the said damper provided with a register,
and means for turning the said damper about its axis, substantially as, and for
the purposes, hereinbefore described.
Third. A smoke-preventer for steam-boiler and other furnaces, comprising a
casing, a perforated air-chamber, provided with a register and with lateral air-
ducts extending into the space over the fire, and a rotary damper having angular
air-ducts and adjustable about its axis in the said casing, substantially 'as, and
for the purposes, hereinbefore described.
al
Fourth. A smoke-preventer for a steam-boiler or other furnace, comprising
casing mounted on a hinged door, a rotary damper having angular air-ducts and
journalled in the said casing, a perforated air-chamber above the said damper
provided with a register and with lateral air-ducts, and means for turning the
said damper about its axis, substantially as, and for the purposes, hereinbefore
described.
Fifth. The combination, in a smoke-preventing apparatus, of a rotary damper
having a series of air-ducts and mounted on a furnace-door, and one or more
nozzles for directing jets of steam into the space over 'the fire, substantially as,
and for the purposes, herein before described.
:.

page_text: Sixth. The improved apparatus constructed substantially as described with
reference to the accompanying drawings and operating as, and for the purposes,
above specified.
Dated this 1st day of November 1898
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.