Year: 1888

page_text: Date of Application, 16th May, 1888
Complete Specification Left, 16th Feb., 1889
Complete Specification Accepted, 16th Mar., 1889
We, HENRY JOHN DAVIS of No. 200 Camberwell Road Camberwell Gas Engineer
and HENRY CHARLES TORNER of No. 54 Shenley Road Camberwell Gas Engineer and
both in the County of Middlesex do hereby declare the nature of this invention to be
as follows:-
Our invention relates to a simple construction of gas heated boiler in such a manner
that it can he readily taken to pieces for cleansing, and that when in action it exposes
a very extended surface to the heating action of the gas flames.
For this purpose, we construct, what may be called the internal fire box, of a
number of equal and similar hollow cylindrical flanged pieces superposed, each piece
having a central tube surrounded by an annular passage from which a number of
tubular ribs extend to the circumference. The fire box, consisting of a number of
these superposed pieces held firmly together and so made sound at the jointings by
screwing up a single nut on a pipe passed through their centres, is enclosed within an
outer cylindrical casing larger in diameter and higher than the fire box. Below the
casing is a hollow base or pedestal in which is arranged a set of gas burners which may
be on rings.
The hot products of combustion ascend the interior space of the fire box, heating on
their way the cylinders.and their tubular ribs and passing off by a chimney at
the top.
The annular space surrounding the fire box being charged with water, this water
circulating in the space and through the tubular ribs becomes heated, generating
steam which collects in the upper part of the casing and is led off by a pipe to work
an engine or for other purposes.
When the boiler is used for heating water without generating steam, the casing is
quite filled with water and kept supplied from a cistern sufficiently elevated, and the
central pipe is arranged to communicate from the space in the upper part of the

page_text: casing to a closed vessel situated just over the gas flames, whence a pipe provided
with a cock or valve leads through the base to the outside. In this case the hottest of
the water rises to the top, then descends the. central pipe to the closed vessel and can
be drawn off when required by opening the stop cock or valve.
ABEL & IMRAY,
Agents for the Applicants.
COMPLETE SPECIFICATION.
An Improvement in Gas. Heated Boilers.
We, HENRY JOHN DAVIS, of No. 200 Camberwell Road, Camberwell, Gas Engineer,
and HENRY CHARLES TURNER, of No. 54 Shenley Road, Camberwell, Gas Engineer,
and both in the County of Surrey, 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 :-
Our Invention relates to a simple construction of gas heated boiler in such a manner
that it can readily be taken to pieces for cleansing, and that when in action it exposes
a very extended surface to the heating action of the gas flames.
For this purpose we construct the boiler as shown in vertical section by Fig. 1 and
in part plan by Fig. 2. What may be called the internal fire box is made up of a
number of equal and similar hollow cylindrical flanged pieces A superposed, each
piece having a central tube B surrounded by an annular passage from which a number
of tubular ribs C extend to the circumference. The fire box, consisting of a number
of these superposed pieces held firmly together and so made sound at the jointings by
screwing up a single nut D on a pipe passed through their centres, is enclosed within
an outer cylindrical casing E larger in diameter and higher than the fire box. Below
the casing is a hollow base or pedestal F in which is arranged a set of gas burners G
which may be on rings.
The hot products of combustion ascend the interior space of the fire box, heating on
their way the cylinders A and their tubular ribs C and passing off by a chimney Hat
the top.
The annular space within the casing E surrounding the fire box being charged
with water, this water circulating in the space and through the tubular ribs becomes
heated. The heat may generate steam which would collect in the upper part of the
casing and might be led off by a pipe to work an engine or for other purposes.
When the boiler is used for heating water without generating steam as shown in
the drawings, the casing E is quite filled with water and kept supplied by a pipe K

page_text: "
from a cistern sufficiently elevated, and the central pipe is arranged to communicate
from the space in the upper part of the casing to a closed vessel L situated just over
the gas flames. By a pipe M provided with a cock or valve hot water can be drawn
off when required.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. A gas heated boiler constructed and operating substantially as herein described.
2. Constructing the internal fire hox of a number of cylindrical pieces superposed
each such piece having a central chamber communicating through hollow spokes with
un outer casing substantially as herein described.
ABEL & IMRAY,
Agents for the Applicants.