IMPROVEMENTS IN STEAM BOILERS
Year: 1878

page_text: LETTERS PATENT to Henry Henson Henson, of Watford, in the County of
Middlesex, for the Invention of "IMPROVEMENTS IN STEAM BOILERS."
PROVISIONAL SPECIFICATION left by the said Henry Henson Henson at
the Office of the Commissioners of Patents on the 28th February 1878.
HENRY HENSON HENSON, of Watford, in the County of Middlesex. " IMPROVE-
MENTS IN STEAM BOILERS."
My Invention has for its object the isolation of the water from contact with the
iron or steel plates of which boilers are made, and consists in the use for that
purpose in combination with the iron or steel of a metal or material which is less
liable to corrosion and waste than either iron or steel.
In carrying out my Invention I veneer, coat, or cover the entire surface of the
iron or steel internally, so as to prevent the water or steam from having any
influence on the metals nained by facing one side of the iron or steel with sheet
copper, yellow metal, zinc, nickel, or other like material, or any other alloy of
metals less liable to waste, corrosion, or other injurious influence that water may
have on the surface of iron or steel, as at present used for the construction of
boilers. Or in lieu of employing the metals before mentioned I may use wood alone
on the internal surface of the iron or steel, or wood, faced or covered with thin
sheets of metal, such, for example, as brass, copper, zinc, yellow metal, or other like
suitable material, such as enamelled metals, earthenware, or the like.
By the use of my Invention I obtain a boiler of increased strength and durability
and less liable to explosions than boilers of the ordinary construction.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Henson Henson in the Great Seal Patent Office on the 28th
August 1878.
HENRY HENSON HENSON, of Watford, in the County of Middlesex.
MENTS IN STEAM BOILERS."
"IMPROVE-
My said Invention, relating to improvements in steam boilers, has for its object
the isolation of the water and steam from contact with the iron or steel plates of
which boilers are composed, in order to prevent the water or steam from having
any injurious influence upon the said metals. This object I effect by lining the
boilers throughout their entire internal surface, or for any required portion of such
surface, with wood, either used alone or faced or covered with thin sheets of a metal,
alloy of metals, or other material less liable than iron or steel to corrosion or
deterioration under the action of water or steam. The sheets may be cast, rolled,
or otherwise formed, and cast or rolled sheets or sheets otherwise produced may be
used alone or in any required combination.
Various metals, alloys, or other materials may be advantageously used as the
facing or covering to the wood, but the following are given as types from which
the selection may be made :-For example, I may use brass, copper, zinc, or yellow
metal, enamelled metals, earthenware, and the like.
•
The wood which I prefer to employ is the description known as Moulmein teak,
or English oak, but wood of other kinds may be used, and in either case it may
be dessicated and rendered partially fire-proof by any one of the well-known
processes.
In applying the wood to the interior of the boiler, so as to form a lining, I first
coat the boiler plates on their inner side with marine glue, or other suitable plastic
material, and then place the wood thereon, at the same time also filling the joints
between the different segments of wood with marine glue or other suitable plastic
material. I then place on the wood lining the facing or covering of metal, alloy,
or other material, as before mentioned, and secure the same thereto in any con-
venient manner.
The Invention is particularly adapted for marine boilers using salt water, but is
also applicable to locomotives and other boilers. In either case the strength and
durability of the boiler is greatly increased, as it is only subjected to the action of
normal wear and tear instead of also to the detoriorating influence of water and
steam upon the iron or steel plates of which it is composed, whilst it is less liable
to explosion than boilers of the ordinary construction.
Having now described and particularly ascertained the nature of my said Inven-
tion, and the manner in which the same is or may be used or carried into effect, I
would observe in conclusion that what I consider to be novel and original, and
therefore claim as the Invention secured to me by the herein-before in part recited
Letters Patent is, lining steam boilers with wood, either used alone or with a facing
or covering of metal, alloy of metals, or other material or materials insusceptible or
partially insusceptible to the deteriorating action of water or steam, for the purpose
of isolating the water and steam from contact with the plates of the boiler, substan-
tially as herein-before described.
In witness whereof, I, the said Henry Henson Henson, have to this my
Specification set my hand and seal, the Twenty-seventh day of August,
One thousand eight hundred and seventy-eight.
HENRY H. HENSON. (L.S.)