Improvements in Steam Generator and similar Furnaces.
Year: 1892

page_text: Date of Application, 23rd Sept., 1892
Complete Specification Left, 23rd June, 1893-Accepted, 5th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam Generator and similar Furnaces.
We BEN PEACE of Old Park Silver Mills Sheffield in the County of York
Secretary and EDWARD ADAMS of Haden Mill Cottage Hilfoot Sheffield
aforesaid Engine Tenter do hereby declare the nature of this invention to be as
follows:-
This invention has reference more especially to the furnaces of steam generators
but it is also applicable to other furnaces and grates and the object of our invention
is to arrange means whereby a better state of combustion will take place and a
further prevention of smoke result than is the case in furnaces of ordinary
construction to attain which we arrange hollow or tubular fire bars extending from
the dead plate or front of the furnace to a hollow or perforated bridge.
At the back of said bridge we place or fix in a horizontal position a specially
formed or constructed device composed of fire clay or other refractory material.
This device is arranged in the form of a box being open at the end near the
perforated or hollow bridge and fitting tight up to the bridge and which latter may
have a projecting flange or flanges so as to fit into the end of the device. The
underside of said device is louvred or formed with a series of openings and at
the upper part of the end farthest from the bridge is a vertical or oblique opening
for the purpose of conducting the heated air to the generated gases travelling from
the burning fuel. The device rests upon or is fixed by four or more fire bricks or
blocks placed or fitted against the sides of the steam generator flue and so arranged
that a horizontal opening is left at each side of the device to allow the heated air
to ascend.
Where preferred the said device may have a horizontal opening or a series of
openings at its end farthest from the bridge in which case we arrange a second
bridge or baffle plate a short distance from the said end.
Dated this 22nd day of September 1892.
H. F. BOUGHTON, M.I. Mech. E.,
16, Commercial Street, Sheffield, Agent.
COMPLETE SPECIFICATION.
Improvements in Steam Generator and similar Furnaces.
We, BEN PEACE of Old Park Silver Mills, Sheffield in the County of York,
Secretary, and EDWARD ADAMS of Haden Mill Cottage, Hillfoot Sheffield,
aforesaid, Engine Tenter, 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 more especially to the furnaces of steam generators,
but it is also applicable to other furnaces and grates, and the object of our invention
is to arrange means whereby a better state of combustion will take place, and a
further prevention of smoke result than is the case in furnaces of ordinary
construction; to attain which we arrange our improvements as illustrated in the
accompanying sheet of drawings, in which
Fig. 1 is a sectional elevation of our improvements applied to an ordinary
steam generator or boiler the front part of the latter being shown in perspective.
Fig. 2 is a sectional plan taken on line a-a of
same,
and
Fig. 3 is a partly broken perspective view of our improved mixer.
Similar letters of reference denote corresponding parts in each view.

page_text: We prefer to arrange hollow or tubular firebars B which extend from the dead
plate or front f' of the furnace F to a hollow perforated bridge C. At the back
of said bridge C we place or fix in a horizontal position a specially formed or
constructed device D composed of fireclay or other refractory material. This
device D is arranged in the form of a box, being open at the end near the hollow
bridge C and fitting tight up thereto, the bridge C being preferably arranged
with a projecting part or flange c¹ so as to fit into the end d¹ of device Ď.
The underside of said device is either louvred or formed with a series of
openings d², and the end d³ is turned up to either a vertical or oblique position,
and has an opening d for the purpose of conducting the heated air to the generated
gases travelling from the burning fuel h. The device D rests upon a suitable
firebrick support d³ and is so arranged that a horizontal opening is left at each
side thereof in order to allow the heated air to ascend. Where preferred the
device D may have a horizontal opening, or a number of perforations at its end d³,
in which case we arrange a second bridge or baffle plate some short distance from
the said end as will be well understood.
In order to regulate the supply of air to our improved device we prefer to
arrange an automatic appliance composed of a lever which connects a door e to a
crank the latter being secured to a rocking shaft S, to which is secured another
door arranged to cover up when required the front openings of the hollow
bars B. The rocking shaft S receives a projection S¹ with which the firedoor j
comes in contact when being opened, thereby moving the rocking shaft S and
drawing the door ; away from the front openings of the hollow bars, and the
door e from the opening at c² which leads to the hollow part of bridge C, and we
make the hollow part of bridge C in the form of a cast iron box as shown. To the
rocking shaft S is connected a bent lever, weighted, M, having a crooked part m¹
which is pivotted at m², and is connected to a pump p arranged on a tank T
filled with oil, the said pump having an ordinary clack piston and a tap.
When the firedoor is opened the clack piston or pump is forced downwards and
oil ascends into cylinder and when the firedoor is closed the oil escapes by the tap
back into tank and allows the piston to gradually ascend and the rocking shaft
is moved by the weighted lever gradually until the doors j and e become closed
sufficiently to allow the proper quantity of air to enter the furnace through the
mixer D for the proper support of combustion.
We do not lay any claim to the automatic appliance described, and have only
shown it because we find it of service with our improvements, neither do we claim
the use of hollow bars or a hollow firebridge, but 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
1. In a steam generator furnace or other similar furnace the use of a hollow
perforated mixer D arranged at the back of a hollow or perforated bridge C in
order to receive and mix air with the gases, substantially as described and
illustrated.
2. In a steam generator or other similar furnace the combination of a hollow
perforated mixer D having an opening and an oblique opening with a
hollow bridge C and hollow furnace bars B substantially as described and
illustrated.
Dated this 22nd day of June 1802
H. F. BOUGHTON,
Sheffield, Agent.