Improvements in or relating to Hot Water and Steam Boilers.
Year: 1895

page_text: Date of Application, 12th Nov., 1895
Complete Specification Left, 11th Aug., 1896-Accepted, 26th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in or relating to Hot Water and Steam Boilers.
We, EDWIN OLDROYD, and EDWIN OLDROYD AND COMPANY, LIMITED,
of Crown Works, Crown Street, Leeds, in the County of York, Engineers, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in low pressure hot water and steam
boilers, and it is particularly applicable for vertical independent boilers such as
are used for heating buildings, as well as for other purposes where steam or hot
water is required. The object of this invention is to construct a wrought or cast
iron boiler with an interior or fire box provided with horizontal corrugations, and
with or without a crown or done top, whereby an increased heating surface is
obtained, and by causing the fire and products of combustion to envelope and
impinge upon the said corrugations and dome, a higher degree of efficiency and
more heating power is obtained from the boiler for a given consumption of coal.
At the same time the boiler is materially strengthened by the corrugations, and
has an elasticity given to it which enables it to resist such influences as would, in
boilers of ordinary construction, permit of an explosion taking place.
According to this invention the boiler may be made in cast or wrought iron, or
other suitable metal or material, in one or more pieces or sections, cist, welded,
or otherwise fixed-when made in more than one section-together by any suitable
and convenient means. The interior or fire box is made conical and its periphery
corrugated; the corrugations are preferably of variable diameters, the uppermost
being the least. Suitable openings for the admission of air and fuel to the
furnace, and for the exit of the smoke and products of combustion are provided.
These openings are preferably, though not necessarily so, arranged at a right angle
to the axis of the boiler.
The boiler as before mentioned may be either cast in one piece, or of wrought
iron or steel and welded into one piece, or it may be made in these materials of
more than one piece, which may be jointed together with screwed nipples, or pro-
vided with flanges and bolts, in which case suitable water spaces or waterways
would require to be provided in the flanges of the interior or exterior of the fire
box or the several parts may be fixed and communicate together by any other
suitable and convenient means.
;
For steam boilers a chamber or dome for the steam, of extended size, of the
same diameter as, or of larger diameter than the outer diameter of the boiler, may
be provided as a part of the boiler itself, or connected thereto by a pipe or pipes
or tube or tubes or it or their equivalents.
Dated this 11th day of November 1895.
EDWIN OLDROYD,
EDWIN OLDROYD & CO., LIMTD.,
By RICHARD MENNELL,
Secretary.

page_text: Improvements in or relating to Hot Water and Steam Boilers.
We, EDWIN OLDROYD, and EDWIN OLDROYD AND COMPANY, LIMITED,
of Crown Works, Crown Street, Leeds, 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 improvements in low pressure hot water and steam
boilers, and it is particularly applicable for vertical independent boilers such as
are used for heating buildings, as well as for other purposes where stoam or hot
water is required. The object of this invention is to construct a wrought or cast
iron boiler with an interior or fire box provided with horizontal corrugations, and
with or without a dome top, whereby an increased heating surface is obtained, and
by causing the fire and products of combustion to envelope and impinge upon the
said corrugations and dome, a higher degree of efficiency and more heating power is
obtained from the boiler for a given consumption of coal. At the same time the
boiler is materially strengthened by the corrugations, and has an elasticity given to
it which enables it to resist such influences as would, in boilers of ordinary
construction, arise from expansion and contraction or permit of an explosion
taking place.
In the drawings hereunto annexed :—
Figs. 1 and 2 are respectively a part vertical section and an elevation drawn at
a right angle to Fig. 1, of a boiler constructed according to this invention.
Fig. 3 a part vertical elevation with the boiler portion made in two parts.
Fig. 4 a transverse section on line a Fig. 3.
Fig. 5 a part vertical elevation with the boiler portion made in three parts.
Like parts in all the views are marked with the same letters of reference; and
although in the drawings we have only shown the boiler made in one, two, or three
sections, we would' have it understood that these boilers may be extended to.four
or any greater number of parts or sections.
A is the boiler base armed with feet a and provided with a tilting fire grate B,
and draught inlets CC closed with suitable rotary covers D for regulating the
admission of air to the furnace or fire box E; all these parts may be of the usual
and ordinary construction.
The boiler portion F which is mounted as shown upon the base A may be made
in cast or wrought iron, or other suitable metal or material, in one or more pieces
or sections as shown at Figs. 1 to 5, cast, welded, or otherwise fixed-when made
in more than one section-together by any suitable and convenient means, such as
flanges G all or partially round each portion of the sections, or by lugs and
bolts H. The interior or fire box I is made conical and its periphery corrugated
at i.as shown. The corrugations are preferably of variable diameters, the upper-
most being of the least diameter. Suitable openings J K L are provided respectively
for the admission of air and fuel to the furnace, and for the exit of the smoke and
products of combustion. The openings J.and K are closed by covers and opening L
provided with a valve. These openings J, K, L are preferably, though not
necessarily so, arranged at a right angle to the axis of the boiler.
The horizontal corrugations i present direct and intensely effective heating
surface; whilst the finer vertical corrugations of the fire box E serve to
overcome the chilling effect of the water directly against the fire, and so maintaing
good combustion.
The boiler F as before mentioned may be either cast in one piece, or of wrought
iron or steel and welded into one piece as at Fig. 1, or it may be made in these
materials of more than one piece, as Bay at Figs. 3.and 5 which may be jointed

page_text: together with screwed nipples, or provided with flanges G and bolts in which
case suitable water spaces or waterways M would require to be provided in the
flanges G in the water space N between the exterior of the fire box I and interior
of the boiler F, or the several parts may be fixed and communicate together by
any other suitable and convenient means. Water to the interior of the boiler is
admitted through aperture O.
For steam boilers a chamber or dome, (not shown in the drawings), for the
steam of extended size, of the same diameter as, or of larger diameter than the
outer diameter of the boiler, may be provided as a part of the boiler itself as
shown in dotted lines Fig. 6.
In the larger sizes the dome of the hot water boilers may be provided with one
or three suspension pockets like jelly bags, depending into the firebox as shown in
dotted lines Fig. 3, which further enhance the heating power.
The same boiler in the various forms is equally applicable for steam purposes
by extending the space from the dome of the firebox to the outer crown and thereby
providing a steam chamber.
We declare that we are aware that the flues of boilers of the Cornish and
marine type have been previously provided with vertical corrugations of the same
diameter, we would therefore have it understood that we do not broadly claim
the same..
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. In a low pressure hot water and steam boiler of the vertical independent type
substantially such as herein described providing its interior or fire box with
horizontal corrugations of variable diameters, which corrugations decrease in
diameter as they approach the crown or dome of the boiler substantially as and for
the purposes herein described and illustrated.
2. In low pressure hot water and steam boilers of the vertical independent type
such as herein described, a boiler portion formed in any desired number of sections
suitably secured together and provided with openings in the water space for the
passage of the water, the interior or fire box portion of each of said sections being
provided with horizontal corrugations of variable diameters which corrugations
decrease in diameter as they approach the crown or dome of the boiler as and for
the purposes set forth and illustrated.
Dated this Tenth day of August 1896.