REVERSING VALVES FOR REGENERATIVE AND OTHER FURNACES
Year: 1887

page_text: Date of Application, 9th June, 1887
Complete Left, 8th Mar., 1888
Complete Accepted, 13th Apr., 1888
WALTER NEILSON Iron Master and HUGH NEILSON Iron Master, Bothwell both
in the County of Lanark and THOMAS WILLIAMSON Engineer, Pollokshields Glasgow,
in the County of Renfrew, do hereby declare the nature of this invention for
REVERSING VALVES FOR REGENERATIVE AND OTHER FURNACES to be as follows:-
Our Invention is designed to overcome the unequal proportions of flue area through.
such Valves.
The Waste of Gas and fuel, and the destruction to which these valves are subject,
also the loss of time and heat when working the Furnaces.
These defects are due to the design and construction of the valve The throttling
of the passages and the difference of temperature due to the hot and cold. gases.
requiring to pass alternately on either side of the valves.
In our improved Valves the gas and air supply passes in through the one valve
only (no hot gases passes through this valve) but the hot waste gases pass out through
an independent valve into the main chimney flues, and prevents the inlet valve from
being destroyed by the intense heat.
The passages and valves are square, in our reversing Valve, and gives a free exit,
equal in area to the other flues.
The ingoing gases enters the valve box, (which is square in plan and elevation) by
a square pipe or tube on top, and has the required area for either gas or air, which
passes through the reversing valve. This valve is placed upright on edge and is hinged
at the bottom in the middle of the valve box, and when it is in a vertical position it
is exactly midway between the openings or inlets into the flues leading to the gas or
air regenerator chambers alternately as the case may be and when the valve is moved
through an angle of about 30° degrees to either side from the vertical position--the
valve closes the opening on the one side while it opens the passage on the opposite side
to the regenerator chamber flues.
At each end of the valve box, there is a hood or box-passage from the valve box,
to which it is attached-the valve box & hood casing, are each bedded on a plate

page_text: which forms a partition between the valve box & hood and the main chimney flue,
above which the said valve box, and hood are placed.
The gases after having passed through the reversing valve, then pass through the
hood and down through an opening in the brickwork, into the flues leading alternately
to the furnace, and from it, to the chimney flue, which, in plan stands at right angles
to the flues, leading into the furnace chambers, and is immediately below the reversing
inlet valve box which is separated by a partition plate, and brickwork.
The openings of the outlet flues, are exactly opposite to each other, with the main
chimney flue (which is common to both) between them-i.e. the hot Gas and air outlets
from the regenerator chambers of the furnace.
At each of these openings is placed a hanging flap door, or valve, which shuts or
acts as a damper and opens alternately, with the reversing of the inlet valve.
It closes against a frame built in the brickwork, which protects it against the intense
heat of the hot waste gases, passing from the furnace through the regenerators to the
chimney.
This outlet valve is square and opens about 60° degrees, or one sixth of a circle-
which gives a much larger area of passage, for the efflux of the increased volume of
hot waste gases, in their passage to the chimney.
The chimney valve, or damper door, is lined with brick to protect it against the
heat as are also the bottom of the gas, and air, valve box.
The spindle of each of the reversing valves, (ciz.: the gas, or air, inlet valve-the
outlet waste hot gas valve, and the opposite or damper valve) have each a lever, or
arm, keyed, or fixed on, and when at half, or mid stroke, or travel, they all three, are
exactly perpendicular, one on each side of the inlet valve reversing lever, and in line
with each other, in plan.
The two outside levers, are connected to the lever of the inlet valve, by an adjustable
connecting rod, so, that the three valves are operated upon simultaneously by the
middle lever, which, is in turn, connected to the reversing lever, on the platform.
There being only the two reversing levers one for Gas & one for Air on the platform
as formerly.
Having described the nature of said invention, what is claimed, as novel, is the
special arrangement, and construction, of the aforesaid, reversing valves, having one
separate, and independent inlet valve, for the ingoing gases an independent valve,
for the outlet waste hot gases-and an independent damper valve, for enclosing the
supply gases, on their passage into the regenerator chambers, and then into the furnace
for combustion-The relation and method of connection of the three valves, and their
method of being operated upon by one reversing lever from the platform.
The large openings, secured by the special arrangement of inlet & ontlet valves―
and, their protection from destruction, due to intense heat.
Dated this 3rd day of June 1907

page_text: COMPLETE SPECIFICATION.
Improvements in Reversing Valves for Regenerative and other
Furnaces.
We WALTER NEILSON and HUGH NEILSON of Bothwell in the County of Lanark,
Ironmasters, and THOMAS WILLIAMSON of Albany Drive Rutherglen in the County
of Lanark, Engineer, 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 :—
Our invention relates to reversing valves for regenerative and other furnaces, and it
is designed to obviate the occurrence of inequalities of flue area and to avoid the
destructive action of the hot gases on such valves and waste of gas and fuel and loss
of time and heat in working the furnace. These defects are due to the design and
construction of the ordinary valve, the throttling of the passages and the difference
of temperature arising from the hot and cold gases requiring to pass alternately on
either side of the valves.
Under our invention the Gas and Air supply passes in through the one valve only,
and the hot gases do not pass through this valve but pass out through an independent
valve into the main chimney flues the destructive action of intense heat on the inlet
valve being thus avoided.
In the accompanying drawings figure 1 is a longitudinal vertical section of our
reversing valve arrangement as applied to the gas inlet to a regenerative furnace, and
figure 2 is a transverse vertical section of the same. In carrying out the invention
the ingoing gas enters the valve box B (which is rectangular in plan and elevation) by
a square pipe or tube A on top, provided with a valve a the said tube A having the
required area for either the gas or air which passes through the reversing valve C.
This valve C is placed upright on edge, and is hinged at c at the bottom in the middle
of the valve box B; and when it is in a vertical position it is exactly midway between
the openings or inlets D, E into the flues F, leading to the gas or air regenerator
chamber alternately as the case may be. When the valve C, is closed on one side the
opposite passage is full open and the valve lies at an angle of about 30 degrees to
either side from the vertical position. At each end of the valve box there is a hood
or box passage B₁ from the valve box to which it is attached. The valve box and hood
casing are each bedded on a plate G which forms a partition between the valve box
and hood and the main chimney flue H, above which the said valve box and hood are
placed. The gases after having passed through the reversing valve C, pass through
the hood B' and down through the opening D or E in the brickwork into the flues F
leading alternately to the furnace and from it to the chimney flue H which in plan
stands at right angles to the flues leading into the furnace chamber and is immediately
below the reversing inlet valve box B. The openings I of the outlet flues are exactly
opposite to each other with the main chimney flue H, which is common to both,
between them. At each of these openings is placed a hanging flap door or valve J, JÍ

page_text: which alternately shuts, or acts like a damper, and opens upon the reversing of the
inlet valve C. Each such flap or valve J, J¹ closes against a frame 1¹ built in the
brickwork, which protects it against the intense heat of the hot waste gases passing
from the furnace through the regenerators to the chimney. Each outlet valve is
square and opens about 60 degrees or one sixth of a circle which gives a large area
of passage for the efflux of the increased volume of hot waste gases in their passage
to the chimney. The spindles klm of the reversing valve C (viz. the gas or air inlet
valve) the outlet waste hot gas valve J, and the opposite or damper valve J¹ have each
a lever or arm, K, L, M, respectively, keyed or fixed on, and when at half or mid
stroke or travel they all three are exactly perpendicular one on each side of the inlet
valve reversing lever K and in line with each other in plan. The two outside
levers L M are connected to the lever K of the inlet valve by an adjustable connecting
rod N so that the three valves are operated upon simultaneously by the middle lever K
which is in turn connected to a reversing lever 0 on the platform, there being only
the two reversing levers (one for air and the other for gas) on the platform as
formerly..
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. The combination of parts constituting the improved reversing valve arrangement
for regenerative and other furnaces substantially as herein described with reference to
the drawings annexed.
2. In reversing valves for regenerative and other furnaces the arrangement and
combination of the air or gas inlet valve and the outlet valves connected together so
as to be operated simultaneously by one reversing lever substantially as described.
Dated this Seventh day of March 1888.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.