Year: 1897

page_text: We, ROSE, DOWNS AND THOMPSON LIMITED, of Old Foundry, Hull, in the County
of York, and JOHN HENRY HOPWOOD, of 12 Middleton Street, Hull, in the County of.
York, Engineers, do hereby declare the nature of this invention to be as follows:-
This invention relates to a construction of water tube boiler of the following
description. From a central water drum having a transverse section consisting of a
semicircle below and two upper flat sides inclined to the vertical at an angle and
forming tube plates, two sets of inclined tubes extend, the one set to the right and the
other to the left, to corresponding inclined sides forming tube plates in two side
drums which are of the same shape as the water drum laid on its side.
From the other inclined sides of these drums, inclined tubes extend to correspond-
ing inclined sides of a central steain and water drum at the top, this drum being like
the water drun inverted. Thus there are four druins of similar shape, and four sets
of inclined water tubes connecting them, all enclosed within a suitable casing along
with two fires, one on each side of the central water drum. The flames and products
of combustion ascend on each side in a direction inclined inwards between the two
lower sets of tubes to a space in the middle, and thence they ascend in a direction
inclined outwards between the upper sets of tubes, and pass over the stean drum to a
chimney.
לAL..-... .on
ABEL & IMRAY
Agents for the Applicants.
An improvement
We, ROSE, DOWNS AND THOMPSON LIMITED of Old -Foundry, Hull, in the County
of York, and JOHN HENRY HOPWOOD, of 12 Middleton Street, Hull, in the County of
York, Engineers, 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 :-
.
This invention relates to a construction of water tube boiler such as is shown in the
accompanying drawing representing a transverse section.
From a central water drum A having a transverse section consisting of a selui-
circle a below and two upper flat sides a inclined to the vertical at an angle and
forming tube plates, two sets of inclined tubes B, C, extend, the one set B to the
right and the other C to the left, to corresponding inclined sides de forming tube
077

page_text: plates in two side water drums D, E, which are of the same shape as the water drum A
laid on its side.
From the other inclined sides d, e, of the druins D, E, inclined tubes F, G extend
to corresponding inclined sides h¹ h* of a central steam and water drum H at the top,
the drum being like the water drum A inverted.
Thus there are four drums A, D, E and H of similar shape, and four sets of inclined
water tubes B, C, F and G connecting them all enclosed within a suitable casing K
along with two fires L, M one on each side of the central water drun A.
The flames and products of combustion ascend on each side in a direction inclined
inwards between the two lower sets of tubes B and C into a space N in the middle,
and thence they ascend in a direction inclined outwards between the upper sets of
tubes, F and G and then pass to a chimney P.
The proportions of the parts, the number of tubes and the form of the casing may
be varied to suit the space for the boiler and other conditions.
The construction described is such as to give large heating surface over the fires to
accommodate a large volume of water and thereby ensure steady working and
economy of fuel. Free access is also given for cleaning and repairs, and, when
necessary, any defective tube can be withdrawn into the drum, and a fresh tube put
in its place.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
A water tube boiler constructed substantially as described with reference to the
accompanying drawingo.
Dated this 1st day of November 1897.
ABEL & IMRAY
Agents for the Applicants.