IMPROVEMENT OF VERTICAL STEAM BOILERS
Year: 1886

page_text: Date of Application, 16th Nov., 1886.
Complete Left, 22nd Jan., 1887.
Complete Accepted, 22nd Feb., 1887,
RESERVE
JOHN HENRY HOPWOOD 8 Elm Tree Avenue Park Street Hull Boiler Maker do
hereby declare the nature of my invention for THE IMPROVEMENT OF VERTICAL STEAM
BOILERS to be as follows:-
My Invention applies to Vertical Steam Boilers & has for its object economy in
fuel it consists in making two opposite sides of the ordinary cylindrical or conical fire
box flat as far down as is necessary to form tube plates. A number of water tubes are
fixed in these tube plates lying horizontally or a little higher at one end than the
other in the upper part of the fire box exposing a very large effective heating surface
to the action of the flame & hot gases.
JOHN HENRY HOPWOOD 8 Elm Tree Avenue Park Street Hull Boiler Maker I do
hereby declare the nature, of my invention for IMPROVEMENTS IN VERTICAL STEAM
BOILERS and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My Invention relates to the vertical type of Steam Boiler and has for its object
economy in fuel by increasing the heating surface and causing a better circulation of
the water with further advantage of access for examining cleaning and repairs.

page_text: To attain this end I make flat two opposite sides of the ordinary cylindrical or
conical shaped fire box far enough down to form tube plates. I fix a number of water
tubes in these said tube plates laying a little higher at one end than the other inside
the upper part of the fire box by this means I expose a very large effective heating
surface to the action of the fire the flame and hot gases coming in contact with the
water tubes as they pass into the uptake or any other suitable outlet leading to the
chimney causes the water to circulate very freely and the steam to generate very
rapidly.
The shell of the boiler is as is usual in this type of Boiler of cylindrical shape there are
no novelties about it except that the man hole instead of being nearly at the top is brought
down to about the middle and that there is a large hand hole made in the opposite side
facing the man hole. When the fire box is in.its position in the shell of the boiler it
stands with one end of the water tubes facing the large hand hole and the other end
facing the man hole so that the water tubes can be examined cleaned and renewed
when necessary.
Instead of the fire box standing upright in the shell of the boiler it leans to the side
in which the large hand hole is made this causes one end of the water tubes to lay a
little higher than the other which helps the circulation of the water very much.
All the hereinhefore description and references apply equally to the cylindrical and
conical shaped fire box.
In order that the nature of my invention may be clearly understood I mark the
accompanyingdrawings with letters and figures indicating the various parts hereinbefore
described and ascertained.
Figure 1 is a vertical section.
Figure 2 is an elevation of the fire box as it stands in the shell of the boiler.
Figure 3 is a sectional plan cutting through the tube plates of the fire box on
line a Figure 1.
On refering to Figures 1 and 3 it will be seen that the fire box leans to the side of
the shell of the boiler in which the large hand hole is made also that one end of the
water tubes ccccc Figure 1 is facing the large hand hole and the other end is
facing the man hole d it will also be seen on refering to Figure 1. that the water tubes
ure a little higher at one end than the other.
The difference between the conical and cylindrical shaped fire box will be
understood from the dotted lines e e Figure 2.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is
The fire box of Vertical Steam Boilers constructed and arranged and operating as
and for the purposes hereinbefore described and shown.