Year: 1895

page_text: Date of Application, 29th Apr 1895-Accepted 15th June 18,5
Fig 1 shows a longitudinal section of the grate and
Fig 2 a plan view of same
Fig 3 is a section on line A-B of Fig 1
The grate is composed of grate bais each con isting of two als R inchiming
towards each other but separated by a central opening or slots and connected at
uitable intervals by cross ridges or supports s¹, s
The slot between the rails R is overlapped by a curved tail S secured to the
idges s¹, s¹ extending above the outer surfaces of the rails R so that the rails S
are supported at a suitable distance from the grate bars R
Below the bars R and immediately opposite the openings or slots are provided
water tubes which are either finely perforated on the top or a very narrow slit
may be made along the entire length of same The tubes are closed at their
inne ends, whereas the ends extending to the front of the grate are connected to
pipe A¹ common to all This pipe A running at 1ight angles to the tubes r
communicates either with the water space of a boiler or other water receptacle
containing water under pressure, the water thus constantly entering the tubes r, is
forced through the perforations on shit in ame and impinges against and cools the
uls S An interstice or slot n is left between the grate bars
The gate is covered with layer of gravel or other suitable material whose
individual particles are sufficiently large to prevent same falling through the
sluts n
The water issuing from tuber not only impinges ainst and thus cools the
rails S, but a small portion of same vaporize, while the gienter part runs down
the inclined grate bars R into the gravel, the heat of which causes more water to
vaporize, a copious supply of steam for the burning coal spread over the layer of
gravel is thus provided, while the fuel burns very briskly and any shag which
should form, is reduced to small particles
The lower layer of coal on the grate is partly decomposed by the steam and
buint to carbonic acid by the fresh atmospheric au simultaneou ly admitted, uch
carbonic acid in passing through the upper hyer of buining coal being reduced
again to carbonic oxide In any case a mixture of combustible gase, composed
of hydrogen and cai bonic oxide, is formed above the layer of coal on the ginte,
ind fresh atmospheric air must be admitted before such gases will burn Such
atmospheric an is fed to the said gases above the layer of fuel through openings
or slots e in a plate P in front of the grate bars
A damper or slide 9 provided with corresponding slots is arranged on the plate P
for more or less closing the openings e, by suitably operating this slide therefore
the volume of fresh ai admitted can be easily regulated One or more inita-glass

page_text: peep holes may be made in the fire door, or at any other suitable place, to enable
the attendant to look into the furnace
Having now particularly described and ascertained the nature of my invel -
tion and in what manner the same 15 to be performed I declare that what I
claim is
―
1 A fire grate for coal dust and small fuels consisting of bars (R) of roof-lihe
cross section provided with a central slot (s) for allowing cooling water issuing
from perforated or slotted tubes (r) to impinge against the rails (S) supported
above the grate bars (R), substantially as described and shown in the drawing
2 In combination with a fire grate for coal dust and small fuels, as set forth in
Claim 1, a layer of gravel or other suitable material placed on and between the
rails (S) and grate bars (R), substantially as described and shown in the drawings
3 In combination with a fire grate for coal dust and small fuels as described in
the foregoing claims, means for feeding air above the grate consisting of a slotted
plate (P) and damper (a) provided with corresponding slots or openings,
substantially as described and shown in the drawings
ТЯБРО LUIS 4 M
LOND
178620 LUIS 49LI UN UI ADITI AD LOND
Ꮀ ᏢᎬᏞᏃᎬᎡ,
Pei W Beck,
115, Cannon Street, London, EC, Agent