An Improvement in or connected with Tubes and Boxes of Fuel Economisers, for Heating Feed for Steam Boilers and the like.
Year: 1897

page_text: Date of Application, 26th Apr., 1897
Complete Specification Left, 25th Jan., 1898-Accepted, 5th Mar., 1898
An Improvement in or connected with Tubes and Boxes of Fuel
Economisers, for Heating Feed for Steam Boilers and the like.
I, FRANCIS WILLIAM GREEN, of the Firm E. Green and Son Limited, Wakefield,
Yorkshire, Fuel Economiser Manufacturer, do hereby declare the nature of this
invention to be as follows:
-
This invention has for object, the construction of tubes and the boxes of fuel
economisers in such manner that the inner surfaces are prevented corroding under
the action of impure water or waters containing salts and minerals and other
injurious matters in solution.
The invention is specially intended for those economisers fitted in the smoke
stack or gas heating chambers of marine boilers but is applicable to economisers
fitted in connection with land boilers.
For the purpose of my invention, the inner liner tubes and liners of boxes of
fuel economisers may be of steel, of copper, of brass, or of other metal, or an alloy
of metals and these may be shaped to fit in close contact with the outer tubes and
of the shells of the boxes either by turning them to shape or by driving them in,
or the outer tube or box shell may be cast on them such as cast iron or the like.
Economiser tubes and boxes prepared from such a combination or compound of
metals besides being free from corrosion from the water would be much stronger,
the outer tube or box shells would be less liable to crack or burn from the high
temperatures of some of the gases evolved from the furnace or furnaces. They
would also have quicker heating properties and be more economical in operation
and more lasting than those at present constructed, particularly those to be
employed in marine service.
An Improvement in or connected with Tubes and Boxes of Fuel
Economisers, for Heating Feed for Steam Boilers and the like.
I, FRANCIS WILLIAM GREEN, of the Firm E. Green & Son Limited, Wakefield,
Yorkshire, Fuel Economiser Manufacturers, do hereby declare the nature of this

page_text: 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 for object, the construction of tubes and the boxes of fuel
economisers in such manner that the inner surfaces are prevented corroding under
the action of impure water or waters containing salts and minerals and other
injurious matters in solution.
The invention is specially intended for those economisers fitted in the smoke
stack or gas heating chambers of marine boilers but is applicable to economisers
fitted in connection with land boilers.
For the purpose of my invention, the inner liner tubes and liners of boxes of
fuel economisers may be of steel, of copper, of brass, or of other metal or an alloy
of metals, and these may be shaped to fit in close contact with the outer tubes, and
of the shells of the boxes either by turning them to shape or by driving them in,
or the outer tube or box shell may be cast on them such as cast iron or the like.
Economiser tubes and boxes prepared from such a combination or compound of
metals besides being free from corrosion from the water would be much stronger
and the outer tube or box shells would be' less liable to crack or burn or become
distorted from the high temperature of some of the gases evolved from the furnace
or furnaces. They would also have quicker heating properties and be more econo-
mical in operation and more lasting than those at present constructed, particularly
those to be employed in marine service.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is: --
The construction of tubes and the boxes of fuel economisers of two metals, such
as ordinary cast iron for the outsides, and of another metal as a liner which is not
affected by impurities in the water, the two metals being in contact, as and for
the purposes specified.