Improvements in Steam Boilers.
Year: 1895

page_text: Improvements in Steam Boilers.
I WILLIAM GARNER of Perseverance Boiler Works, Coblen Street,
Pendleton, Manchester, in the County of Lancaster, Engineer, do hereby
declare the nature of this invention to be as follows:-
―
The principal object of this invention is to construct a vertical boiler for the
generation of steam at high pressure.
According to my invention I connect to the top of the boiler a conical or curved
tube plate. The top of the fire box is also formed in a similar manner, the two
conical or curved tube plates tapering inwards towards each other; and in there
tube plates I fix a number of vertical curved tubes, the length of which will vary
according to their position in the boiler, the curve being preferably such that
any tube can be conveniently withdrawn or replaced without disturbing the
remainder.
I prefer also make the smoke box circular in form, fitting over the upper
conical tube plate, and provided with an enlargement or recess leading to the
smoke flue which can thus be set at any point around the centre of the top of the
boiler. The smoke box is or may be provided with a hinged cover to admit of
easy access to the tubes.
By this improved construction, as the heat cannot rush so quickly through the
curved tubes as through straight ones I utilize the water heating space most
advantageously.
The curved tubes will also be longer than straight ones of the same vertical
height, and the steam in the annular space formed by the conical top tube plate
will be superheated by the heat in the conical part of the smoke box, and the
upper ends of many of the curved tubes.
The curve of the tubes also will allow of the expansion and contraction of the
said tubes and prevent all liability to leakage at the joints of the tubes and
tube plates.
Dated this 22nd dor of Lune 1895
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.
I WILLIAM GARNER of Perseverance Boiler Works, Cobden Street,
Pendleton, Manchester, in the County of Lancaster, Engineer, 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:-
The principal object of this invention is to construct a vertical boiler for the
generation of steam at a high pressure.
The nature of my said improvements and the manner in which the same is to be
DQ77

page_text: performed or carried into practical effect will be readily understood on reference to
the accompanying sheet of drawings and the following explanation thereof.
Fig. 1 on the drawings is a vertical section, Fig. 2 a horizontal section of a
vertical steam boiler constructed according to my invention, and Fig. 3, is a vertical
section and Fig. 4 a plan view of a modified form thereof.
In these views a represents the body of the boiler, b the fire box, and c the
smoke box.
Fig. 3).
According to my invention I connect to the top of the boiler a conical tube
plate
(as shewn at Fig. 1) or a curved or dished tube plate d' (as shewn at
The top e or e¹ of the fire box b (which forms the corresponding tube plate) is
also formed in a similar manner, the two tube plates tapering or curving inwards
towards each other at the centre; and in these tube plates I fix a number of
vertical curved fire tubes f the length of which will vary according to their
position in the boiler, the curve being preferably such that any tube f cau be
conveniently withdrawn or replaced without disturbing the remainder.
The central part of the two tube plates may either be connected by one larger
straight tube f (as shewn at Fig. 3) or by two or more small straight tubes f
(as shewn at Figs. 1 & 2).
I prefer also to make the smoke box c circular in form (as seen on the plan view
Fig. 4) fitting over the upper conical or dished tube plate d or d', and to provide
the same with an enlargement or recess leading sideways to the smoke flue which
can thus be set at any point around the centre of the boiler. The smoke box c is,
or may be, provided with a hinged cover c¹ to admit of easy access to the tubes f
and if desired a coil of piping may be inserted in the space above the upper tube
plate (as shewn by dotted lines on Fig. 3) for the purpose of heating the feed
water by the waste heat from the tubes.
By this improved construction of steam boiler, as the heat cannot rush so quickly
through the curved tubes as through straight ones, I utilize the water heating space
most advantageously.
The curved tubes f will also be longer than straight ones of the same vertical
height, and the steam in the annular space formed by the conical or dished top
tube-plate will become superheated by the heat in the conical part of the smoke
box, and the upper ends of many of the curved tubes.
The curve of the tubes f will also allow of the easy expansion and contraction of
the said tubes, and prevent all liability to leakage at the joints of the tubes and
tube plates.
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:-
First. The general improved construction and arrangement of steam boiler as
hereinbefore described and illustrated by the drawings annexed, and
Secondly. I claim the combination in vertical tubular steam boilers of tube
plates coned or curved towards each other at the centre, with vertical fire tubes
curved outwards in a barrel form substantially in the manner and for the purposes
herein before mentioned.
Dated this 23rd day of March 1896.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.