AN IMPROVED MODE OF AND APPARATUS FOR UTILIZING THE WASTE HEAT FROM THE FURNACES OF MARINE BOILERS AND SUPPLYING SUCH BOILERS WITH DISTILLED WATER
Year: 1878

page_text: LETTERS PATENT to Everden Wimshurst, of Campbell Road, Bow, in the
County of Middlesex, Engineer, for the Invention of "AN IMPROVED MODE OF
AND APPARATUS FOR UTILIZING THE WASTE HEAT FROM THE FURNACES OF
MARINE BOILERS AND SUPPLYING SUCH BOILERS WITH DISTILLED WATER."
Sealed the 21st January 1879, and dated the 19th September 1878.
PROVISIONAL SPECIFICATION left by the said Everden Wimshurst at the
Office of the Commissioners of Patents on the 19th September 1878.
EVERDEN WIMSHURST, of Campbell Road, Bow, in the County of Middlesex,
Engineer. "AN IMPROVED MODE OF AND APPARATUS FOR UTILIZING THE WASTE
HEAT FROM THE FURNACES OF MARINE BOILERS AND SUPPLYING SUCH BOILERS
WITH DISTILLED WATER."
The object of this Invention is to supply marine boilers with fresh water during
a lengthened sea voyage, and thereby to prevent the inconveniences arising from the
use of salt water in such boilers. Within the funnel or uptake I fit a water-tight
vessel of such shape that it will not interfere materially with the draught, but will
present a large heating surface to the ascending gases of combustion.
This vessel I connect with a supply water cistern which receives its water from the
discharge pipe of the engine and is so situate as to maintain a proper level of water
in the heating vessel. This beating vessel may be conveniently constructed of a rect-
angular form, and so as to slide endwise through vertical slots cut in the sides of the
funnel for that purpose, its length being such that its opposite ends will extend
outwards beyond the funnel.
In the tube or passage which connects this heating vessel with the supply water
cistern I fit a blow-off valve which will effectually prevent an undue pressure of
steam being created in the vessel. The water exposed to the heat of the ascending
ID 677

page_text: gases will be maintained at a boiling heat and it will thus be constantly giving off
steam, which steam I lead to a condenser, whence it may be conveyed to the boiler
to supply any deficiency therein. A portion of the water so distilled may be used
if required by the ship's company.
The water-heating vessel which I form by preference with flat sides I fit with a
scraper, attaching the same to a rod which passes through a stuffing box at one end
of the vessel. By moving this scraper to and fro from end to end of the vessel any
salt which may deposit on the sides and bottom of the vessel will be disengaged
therefrom and may be blown out as brine through a mud hole provided for that
purpose.
Instead of this heating vessel being placed transversely of the funnel opening I
may use a cylindrical jacket which surrounding the funnel will form therewith an
annular water chamber. This chamber will be connected with a water-supply
tank as before explained, and the steam generated in the annular chamber by
the action of the ascending gases of combustion will be led off to a condenser as
before explained, and passed from thence into a tank or other vessel for use as
required. To permit of this hot-water chamber being cleaned I adapt a circular
scraper or brush to the inside thereof and operate the same. by rods in any con-
venient manner.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Everden Wimshurst in the Great Seal Patent Office on the 19th
March 1879.
EVERDEN WIMSHURST, of Campbell Road, Bow, in the County of Middlesex,
Engineer. "AN IMPROVED MODE OF AND APPARATUS FOR UTILIZING THE WASTE
HEAT FROM THE FURNACES OF MARINE BOILERS AND SUPPLYING SUCH BOILERS
WITH DISTILLED WATER."
The main object of this Invention is to supply marine boilers with fresh water
during a lengthened sea voyage, and thereby to prevent the inconveniences arising
from the use of salt water in such boilers..
The means whereby I attain this end is shewn in the accompanying Drawing,
Fig. 1 being a sectional elevation of the apparatus for providing distilled water to
meet the waste in the marine boilers, such apparatus being set in its proper relation
witli the funnel or uptake and the surface condenser which returns the condensed
steam from the engines to the boilers; Fig. 2 is a diagram plan of the apparatus.
In this Drawing A, A, A, is a set of three marine boilers, and B is the funnel or
uptake in connection with the furnaces of such boilers; C is an ordinary surface
condenser; and D is the exhaust pump in connection therewith; E is a water-tight
vessel fitted to the funnel or uptake, and of such shape that it will not interfere
materially with the draft but will present a large heating surface to the ascending
gases of combustion. This vessel É is connected by a pipe e with a supply water
cistern F, which receives water from the discharge pipe of the surface condenser
through the pipe c. This pipe c may conveniently be fitted with a valve which
will prevent the return of the water from the vessel F to the condenser C. The
supply water cistern F is so situate as to maintain a proper level of water in the
heating vessel E.
This supply water cistern F I fit with tube plates f and connect these plates
together by means of tubes f¹. The steam generated in the vessel E I lead off by
a'pipe e' to the near end of the vessel F and the steam will pass thence through the
tubes f¹ and by a pipe g to a condenser G. As the water for supplying the vessel E
circulates around the steam tubes fi its temperature will be raised before it enters
the vessel E; at the same time the steam on its passage to the condenser G will be
materially reduced in temperature if not condensed before leaving the vessel F.
The heating vessel E is constructed preferably of a rectangular form with flat
vertical sides, such shape admitting of its sliding endwise through vertical slots cut
in the sides of the funnel for that purpose, its length being such that its opposite
ends will extend outwards beyond the funnel.
In the tube or passage which connects this heating vessel with the supply water
cistern a safety valve may be fitted if thought desirable to prevent an undue
pressure of steam being created in the vessel. The water exposed to the heat of the
ascending gases will be maintained at a boiling heat and it will thus be constantly
giving off steam, which steam passes off as already explained to the condenser G,
whence it may be conveyed by a force pump to the marine boilers to supply any
deficiency therein.
A portion of the water distilled in the vessel E may when required be used by the
ship's company, the supply being continuous and therefore in excess of the require-
ments of the marine boilers.
The water-heating vessel E is fitted with a scraper H which fits the vessel like a
piston, and has openings made in it to allow of the water in the vessel flowing
freely through it. This scraper is attached to a rod h passing through stuffing boxes
at opposite ends of the vessel.
The outer extremities of this rod are connected to chains h' which pass over guide
pullies h² and are pendent therefrom. By pulling on one or other of these chains a
traverse motion is imparted to the scraper which may be thus drawn from end to

page_text: end of the vessel E. By thus moving this scraper to and fro any salt which may
deposit on the sides and bottom of the vessel will be disengaged therefrom and may
be blown out as brine through a mud hole e² provided for that purpose.
I may here remark that instead of the heating vessel E being placed transversely
of the furnace opening I may use a cylindrical jacket, which surrounding the funnel
will form therewith an annular water chamber. This chamber being connected
with a water supply tank as before explained steam will be generated in the annular
chamber by the action of the ascending gases of combustion, and the steam being led
off and condensed as before explained may be used as required.
To permit of the annular hot-water chamber being cleansed a circular scraper or
brush may be adapted to the inside thereof and operated by rods in any convenient
manner.
Having now set forth the nature of my said Invention and explained the manner
of carrying the same into effect I wish it to be understood that under the above in
part recited Letters Patent I claim,―
The means above described in connection with the funnel or uptake of marine
boilers for distilling water, as and for the purpose above set forth.
In witness whereof, I, the said Everden Wimshurst, have hereunto set my
hand and seal, the Nineteenth day of March, in the year of our Lord One
thousand eight hundred and seventy-nine.