IMPROVEMENTS IN FURNACE GRATES AND IN APPARATUS CONNECTED THEREWITH FOR HEATING WATER FOR STEAM BOILERS, AND FOR OTHER LIKE PURPOSES
Year: 1870

page_text: PROVISIONAL SPECIFICATION left by William Robert Lake at the
Office of the Commissioners of Patents, with bis Petition, on the
26th January 1870.-A communication from abroad by Charles
Emery Hutson, of Commerce, Missouri, United States of America,
Mechanical Engineer.
I, WILLIAM ROBERT LAKE, of the "International Patent Office,"
Southampton Buildings, London, Consulting Engineer, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN FURNACE GRATES
AND IN APPARATUS CONNECTED THEREWITH FOR HEATING WATER FOR STEAM
BOILERS, AND FOR OTHER LIKE PURPOSES," a communication, to be as
follows:-
:-
This Invention relates to passing water through hollow grate bars
and connecting the water flow at times with a hot water or hot water
and steam jet from the boiler so as to discharge mud or sediment through
a proper mud drum.
The said Invention also relates to the details of arrangement and
construction of the parts to enable the same to act more perfectly as
an improved feed water heater. The grate bars are supported in the
usual manner upon proper foundations so that fuel may be placed
thereon and be consumed in a combustion chamber or furnace of the

page_text: usual form. Connected with the end grate bar is a cold water feed pipe
coming from an ordinary cold water pump or from a heater or other
water supplying vessel. In the said feed pipe is a check valve for
In connection with the said
preventing a return flow of the water.
feed pipe I arrange a steam or hot water jet pipe, the upper end whereof
is suitably perforated, and which passes into the boiler or other vessel
which is to be supplied with water. At the joint or junction of the jet
pipe with the shell of the boiler a suitable cap is placed to secure the
said pipe firmly to the boiler, and making a steam-tight joint in the
usual manner. The said pipe has a valve operated by a hand wheel, or 1
in any other suitable manner, to cut off the steam or water in its passago
from the boiler and prevent the entrance of feed water from the cold
water pipe. A second check valve is placed in the latter pipe beyond the
joint which connects the said pipe with the hot water pipe. This check
valve is arranged to prevent a return flow of the feed water immediately 1
from the grate bars. The feed water passes from the cold water pipe
into the grate bars and through the same to an influent pipe, and from
this into the boiler as a feed water supply; the connection of the last
mentioned pipe with the boiler is in the ordinary manner, and the said
pipe has a check valve of the proper form to prevent the return flow of
the water. As the feed water passes from the cold water pipe through
the grate bars it becomes heated and at the same time acts to reduce
the heat of the grate bars and prevents their being consumed. In order
to retain the sediment out of the feed water so as to prevent the deposit
of the same in the grate bars or its accumulation in the boiler I arrange:
in connection with the cold water feed pipe a mud drum around a side
pipe which connects directly with the cold water pipe and conducts
steam through the drum. This side pipe is perforated at that part of its
length which is within the said drum. The side pipe has a suitable
blow-off valve. In order to make the grate bars removable with as
little damage as possible in case one bar is disabled, the said bars
consist principally of the usual wrought-iron pipe part joined by a
screw or flange joint with cast-iron heads, the heads of two adjoining
bars abut at the edge, and to make a packed joint a double cone packing
ring is inserted; a bolt makes the joint perfect.