IMPROVE- MENTS IN STEAM BOILER FURNACES AND APPARATUS EMPLOYED FOR SUPPLYING WATER TO STEAM BOILERS
Year: 1856

page_text: (This Invention received Provisional Protection, but notice to proceed with the
application for Letters Patent was not given within the time prescribed
by the Act.)
PROVISIONAL SPECIFICATION left by William Henry Aston and Samuel
Hopkinson at the Office of the Commissioners of Patents, with their
Petition, on the 24th November 1856.
We, WILLIAM HENRY ASTON and SAMUEL HOPKINSON, of Zetland Mill,
Huddersfield, do hereby declare the nature of the Invention for "IMPROVE-
MENTS IN STEAM BOILER FURNACES AND APPARATUS EMPLOYED FOR SUPPLYING WATER
TO STEAM BOILERS," to be as follows:-
This Invention has for its object improvements in steam boiler furnaces and
apparatus employed for supplying water to steam boilers, and the improve-
ments are applicable where hollow fire bars are employed. For these purposes
the apparatus constituting the furnace and for supplying the boiler are
arranged as follows:-The furnace is arranged with two sets of hollow fire
bars, the upper set has the addition in front of a set of ordinary fire bars so
arranged that the fuel thereon is supplied with air up through the ordinary
front set of fire bars, and the products pass from the fuel on such ordinary set
of fire bars over and down through the fuel on the upper set of hollow fire
bars. There is a water bridge or box at the back end of the upper set of
hollow fire bars through which there is an opening below the upper set of
hollow fire bars at a point below the opening through the water bridge; and
below the upper set of hollow fire bars is a second or lower set of hollow fire
bars, on which there is a second fire, over which the products from the upper

page_text: fire pass. Air may be admitted above and below such second fire. Beyond
the water bridge above mentioned is a second water bridge, at the lower part
of the flue, over which the product from the fires pass. The two sets of
hollow fire bars are composed by preference of one continuance zig-zng bent
tube, and the water flows from the hinder water bridge through the zig-zag
tube forming the upper set of hollow firo bars down to and through the lower
zig-zag bent tubo forming the lower set of hollow fire bars. The water is
supplied to the boiler through a stand pipo which descends to near the bottom
of the boiler. The water is pumped or supplied to the upper part of the
stand pipe, but cannot descend into the boiler, there being a partition between
the upper and lower parts of the stand pipe; a tube passes from the stand pipo
above the partition, descends down to a valve box, from which a tubo descends,
and is connected with the lower part of the boiler, but the passage into such tube
is closed by a valve opening into the valve box. There is also a second tube
connected to the valve box, which passes into and along the lower part of the
flue till it comes to the hinder water bridge, to which its end is fixed, and by
which the water is supplied to that water bridge. Froni the upper part of the
binder bridge a tube passes through a passage or opening in the front water
bridge, and conveys the water to the upper set of hollow fire bars. The water
having circulated to and fro in the upper fire bars descends to and circulates
to and fro through the lower hollow fire bars, and thence out at the end into
the front water bridge; the water passes out of the upper part of the front
water bridge through a tube, which is placed along the upper part of the flue,
and thence into the stand pipe below the partition, and thence down the lower
part of the stand pipe into the boiler, having become highly heated in its
passage. When water is not being supplied to the upper part of the stand
pipe, the water can circulate from the bottom of the boiler past the valve into
the valve box, and thence through the tubes, as above explained.