An Improved Construction of Tubulous Boiler.
Year: 1890

page_text: Date of Application, 30th Apr., 1890
Complete Specification Left, 15th Jan., 1891--Accepted, 21st Feb., 1891
PROVISIONAL SPECIFICATION.
An Improved Construction of Tubulous Boiler.
I, EDWARD VIGERS, of No. 31 Fernhead Road, Paddington, in the County of
Middlesex, Gentleman, do hereby declare the nature of this invention to be as
follows:-
My invention relates to a simple and strong construction of tubulous boiler
presenting extended heating surface arranged in such a manner that a portion of
the tubes can be readily removed and replaced when required. Each end of the
boiler consists of a water casing of rectangular section with arched top. These
two casings are connected at the top by a cylindrical steam space on each side
of which and communicating with it somewhat lower down there is a water tube
connecting the two casings, while near the bottom there are two other water
tubes connecting the end casings one on each side of the fire which is in the
middle with the fire door in one of the end casings. Thus there are four water
tubes connecting the two end casings, two at a low level and two at a high
level. 1 connect the upper and lower of each pair by small water tubes which
are bent so as to accommodate increased length in the space, and to give narrow
passages between them for the products of combustion on their way to the
chimney. In order to give facility for expanding the ends of the small water
tubes in the larger tubes, I make the latter in short lengths, flange jointed
together, and this admits of a pair of lengths with their connecting small tubes
being readily removed and replaced.
The whole is enclosed in a casing made of or lined or covered with material which
is a bad conductor of heat.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Construction of Tubulous Boiler.
I, EDWARD VIGERS, of No. 31, Fernhead Road, Paddington, in the County of
Middlesex, Gentleman, 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:—
My invention relates to a simple and strong construction of tubulous boiler
presenting extended heating surface arranged in such a manner that a portion of
the tubes can be readily removed and replaced when required, as I shall describe
with reference to the accompanying drawings. Fig. 1 is a transverse section,
Fig. 2 is a side view with casing removed to shew the interior. Each end of the
boiler consists of a water casing A. of rectangular section with arched top.
These two casings are connected at the top by a cylindrical steam space B on
each side of which, and communicating with it somewhat lower down, there is a
water tube C connecting the two casings, while near the bottom there are two
other water tubes D connecting the end casings, one on each side of the fire F
which is in the middle with the fire door E in the front one of the end casings.
Thus there are four water tubes C, C, D, D, connecting the two end casings A A,
two of these water tubes DD at a low level and two C C at a high level.
connect the upper and lower of each pair by small water tubes G which are bent so
as to accommodate increased length in the space, and to give narrow passages

page_text: between them for the products of combustion on their way to the chimney, which
passes through the upper part of the back water cusing A. In order to give
facility for expanding the ends of the small water tubes G in the larger tubes C
and 1, make the latter in short lengths, flange jointed together as at 11, and this
admits of a pair of lengths with their comecting small tubes being readily 5
removed and replaced. The whole is enclosed in a casing K, made of, or lined or
covered with material which is a bad conductor of heat. In some cases I carry up
the casing K to a chimney as indicated by the dotted lines K' in Fig. 1 in which
case the flue passage through the back casing may be closed by a door, on opening
which access can be got to examine the interior of the casing.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, | claim,
A tubulous boiler consisting of two end water casings connected by a central
eylindrical steam space and by an upper and lower cylindrical water space on each
side of a central fire, the upper and the lower water spaces one ch side being 1
connected by small bent water tubes, substantially as described.
ABEL & IMRAY,
Agents for the Applicant.
ABEL & IMRAY,
Agents for the Applicant.