Year: 1893

page_text: Date of Application, 12th Dec., 1893-Accepted, 1st Sept., 1894

page_text: lugs 16, which fit over the upper edge of a bar 17, of the grate frame. The front
edges of the plates below the point 18, meet together, as shown at 19, Fig. VI,
while from their front edges the plates taper back so as to form spaces 20 between
them, through which the air passes from the ash-pit. Above the point 18 the front
edges of the plates are cut away, as shown at 21, Fig. VII, to permit the air to
pass into the fire-box in front of the bridge-wall, as shown by the featherless
arrows, Fig. IV. The backs of the plates are provided with horns 22 to receive a
steam pipe 23, which has perforations 24, see Fig. XI, in its side which faces the
fire box.
In the operation of the furnace, air passes from the ash pit up between the
plates 11, and escaping through the openings 21, enters the inner part of the fire
box, and to provide for a large amount of air or oxygen, when required, the pipe 23
is employed, through which steam may be passed to create a forced current of air
from the ash pit into the fire box.
Over the pipe 8 a brick, or other wall 24 is formed, which closes the space
between the boiler and the walls of the furnace above the pipe. This pipe 8, with
the wall 24 causes the heat and products of combustion of the front part of the
fire box to descend and pass through the space between the pipes 8 and 6, where
they are brought into direct contact with the oxygen entering between the
plates 11, the result being a thorough combustion, and a thorough consumption of the
smoke. By connecting the pipes 8 and 6 with the boiler, the heat passing between
these pipes acts to a considerable extent to heat the water in the boiler, as the water
will circulate from the boiler through these pipes, and back again to the boiler.
The pipe 6 might be dispensed with, if desired, and instead of the pipe 8, there
might be substituted a bar 25, (see Figs. VIII and IX,) for supporting the wall 24.
This bar may be supported in the sides of the furnace wall or by other suitable
ineans. For the purpose of protecting the bar from heat, a number of tenons 26
is formed upon its under side and blocks 27 are employed, each of which has a
mortise 28, see Fig. X, to receive one of the tenons 26. Each block has a vertical
flange 29, which fits against the front edge of the bar 25, as shown in Fig. VIII.
.The blocks fit one against another, and protect the bar 25 from the flames and heat
of the fire box, and when any one or more of the blocks becomes destroyed by heat,
it can be readily slipped off the bar, and replaced by another.
30 represents a damper hinged beneath the grate, and which may be operated
from the front of the furnace, by means of a rod 31, for the purpose of regulating
the passage of heat from the ash pit to the spaces between the plates 11.
The grate consists of a front bar 35, a rear bar 17, and two side bars 37; these
bars forming a rectangular frame, and the bar 17 forming the support for the
plates 11 by receiving the hooks 16, as stated.
39 represents zigzag grate bars having journals 40, fitting in the side bars 37.
41 represents blocks or sections having depending legs 42, fitting over the grate
bars 39, at their angles. The blocks have wings 43 and 44. Two wings are shown
in Fig. XV, and three in Fig. XIV. The blocks or sections are so formed that
each can fit or be used on either angle of the grate bars. This is accomplished by
having the wings 43 longer than the wings 44. The blocks are put in place with
the wings 43 on the inside of the angles of the grate bars, as shown in Fig. XII,
which brings the short wings 44 on the outside of the angles, and thus any section
may be used on any angle of either grate bar. These blocks or sections hold the
fuel away from the grate bars, protecting the latter, and as they become destroyed
by heat, they can be slipped off and replaced by others.
The inner faces of the front and rear bars 35, 17, of the frame are provided with
projections 46, to interlock with the wings of the adjacent blocks or sections 41.
The side bars 37 of the grate are protected from heat by means of blocks or
sections 47, (see Figs. XVI and XVII), having downwardly projecting legs or
extensions 48, which straddle the side bars, as shown. These sections hold the fuel
from the side bars and protect them from the heat, and they can be readily renewed,
as they are worn out.

page_text: W
The grate bars have depending ears or projections 50, to w
r 51, (see Fig. IV). For the purpose of moving the bar 51, and shaking the
employed. The lever is
rate, a lever 52, connected to the bar 51 by a link 53
tted in a head 54, pivoted at 55 to a bracket 56 secured to the front bar 35 of the
rate frame. The bracket 56 has a perforated, horizontal extension 57, and the
ead 54 of the lever has a perforated lug 58. When it is desired to hold the grate
ars in horizontal position, a pin 59 is passed through the perforations of the
xtension 57, and lug 58; and when it is desired to shake the grate, the pin is.
emoved, so that the head 54 turns on its pivot 55.
Having now particularly described and ascertained the nature of the said inven-
ion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondents I declare that what I claim is :-
1. In a boiler furnace, in combination with a bridge-wall and grate, the plates 11,.
formed substantially as and for the purpose set forth.
2. In a boiler furnace, in combination with a bridge-wall and grate bars, the
plates 11 formed with tapering sides at their lower parts, and with openings at their
upper parts, substantially as and for the purpose set forth.
3. In a boiler furnace, in combination with a bridge-wall and grate bars, the
plates 11 having tapered sides at their lower parts, and openings at their upper
parts, and having notches in their upper ends to receive a strip 13; substantially
as and for the purpose set forth.
4. In a boiler furnace, in combination with a bridge-wall and grate bars, the
plates 11 having openings 21, and provided with lugs 16 on their front faces, and
projections 15, and horns 22 on their rear faces, and a perforated steam pipé fitting
in said horns; substantially as and for the purpose set forth.
5. In a boiler furnace, the combination of a bridge-wall, water pipes 6 and 8
connected together and to the boiler, a wall 24.over the pipe 8, and means for
admitting air to the fire box in front of the bridge wall; substantially as and for
the purpose set forth.
6. In a boiler furnace, the combination of a bridge-wall, means for admitting air
in front of the bridge-wall, and a deflector located beneath the boiler, slightly in
front of the bridge-wall; the space between said walls of the furnace and the boiler
above said deflector being closed, substantially as and for the purpose set forth.
7. In a boiler furnace, a deflector consisting of a water pipe 8, and a wall 24
5 located in front of the bridge wall; substantially as and for the purpose
set forth.
8. In a boiler furnace, a deflector consisting of a bar 25, having tenons, and
blocks having mortises to receive the tenous, and having vertical flanges to protect
said bar; substantially as set forth.
9. In a boiler furnace, the combination of a bridge-wall, the plates 11 located in
front of the bridge-wall for admitting air from the ash-pit to the front part of the
fire box, and a deflector located beneath the boiler slightly in front of the bridge
wall; substantially as and for the purpose set forth.
10. In a boiler furnace, the combination of a bridge-wall, the grate bars, the
45 plates 11 made substantially as shown and described, and a damper 30, substantiall
as set forth.
50
11. In a boiler furnace, a grate consisting of the combination of zigzag bar
blocks or sections 41, having depending legs 42, short wings 44, and long wings 43
substantially as and for the purpose set forth.
12. In a boiler furnace, a grate consisting of the combination of a zigzag grat
bar, and removable and interchangeable blocks or sections 41, substantially as s
forth.
13. In a boiler furnace, a grate consisting of the combination of side bars,
which the grate bars are supported, and blocks 47 having legs 48, substantially
55 and for the purpose set forth.
14. In a boiler furnace, a grate consisting of the combination of grate ba

page_text: having extensions 50, a bar 51, pivoted to said extensions, a bracket 56 secured to
the front bar of the grate frame, a head 4 pivoted to said bracket, at 55, and a
lever fitting in said head; said bracket having a perforated extension 57, and said
head having a perforated lug 58, and a pin 59; substantially as and for the purpose
set forth.
Dated this 11th day of December 1893.
WM. P. THOMPSON & Co.,
Agents for the Applicant.