Improvements in Water-tube Boilers.
Year: 1896

page_text: Complete Specification Left, 22nd Sept., 1896-Accepted, 16th Jan., 183?
PROVISIONAL SPECIFICATION.
Improvements in Water-tube Boilers.
1 SAMUEL JOHN HAMBLIN of No. 2 Marsh Terrace, The Marsh, Newbury,
Berks, Engine-fitter do hereby declare the nature of this invention to be as
follows:-
"Improvements in water-tube boilers" is formed with two tube-plates (similar
to those in the front of a portable boiler) fixed together by a horizontal shell in the
upper part. The space below the shell and round the firebox is occupied by
horizontal water-tubes, connected with water-spaces formed by outer dished plates,
covering the whole surface at both ends. The fire-bars are formed of water-tubes
which also connect with the water-spaces and are protected from cold draft by au
inverted V-iron placed below cach tube. The dished-plates may be either bolted
or rivetted to the tube-plates round the edges and stayed at intervals; the fire-
hole also serving to stay the two plates together in the front. A combustion-
chamber is fixed in the shell by stays, with screwed tubes also, on the lower side,
to form the connection between the fire-box and the combustion-chamber; the
flat top being below the water-level and stayed by bridges. The whole to be
covered with ordinary casing.
CLAIMS OF IMPROVEMENTS IN WATER-TUBE BOILERS:
(1.) Being simple aud light iu construction, it is very cheap to build and keep in
repair.
(2.) Owing to the rapid circulation of the water and total absence of "
there is a minimum of liability to corrode.
pockets,"
(3.) All the tubes being straight, they combine a maximum of strength with a
minimum of liability to strain the joints and are easily replaced.
(4.) The fire-bars being water-tubes, protected from cold draft by a V-iron,
steam is more quickly generated and, consequently, fuel is saved.
(5.) The combustion-chamber being so placed as to be always covered by water,
its heat is confined within the boiler and utilized in assisting the generation of
steam.
Dated this 4th day of May 1896.
I, SAMUEL JOHN HAMBLIN of No. 2 Marsh Terrace, The Marsh, Newbury,
Berks, Engine-fitter do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
Improvements in water-tube boilers formed with two tube plates (A) (similar to
those in the front of a portable boiler) fixed together by a horizontal shell (B) in

page_text: the upper part. The space below the shell and round the firebox is occupied by
horizontal water-tubes (C) connected with water-spaces formed by outer dished
plates (D) covering the whole surface at both ends. The fire-bars (E) are formed
of water-tubes which also connect with the water-spaces and are protected from
cold draft by an inverted V-iron (F) placed below each tube. The dished-
plates (D) may be either bolted or rivetted to the tube-plates (A) round the edges
and stayed at intervals; the fire-hole (G) also serving to stay the two plates
together in the front. A combustion-chamber (H) is fixed in the shell by stays,
with screwed tubes (I) also, on the lower side, to form the connection between the
firebox and the combustion chamber (H); the flat top being below the water-level
and stayed by bridges (J) or hanging-stays. The whole to be covered with
ordinary casing.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1.) The protection of the water-tube fire-bars from cold draught by
V-irons (F).
(2.) The introduction of a combustion-chamber (H) so placed as to be always
covered by water and extending the whole length of the boiler.
Dated this 17th day of September 1896.
SAMUEL JOHN HAMBLIN.