Improvements in Steam Generators.
Year: 1890

page_text: Date of Application, 5th Apr., 1890
Complete Specification Left, 5th Jan., 1891-Accepted. 7th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
I, WILLIAM COOKE of Storeton Road Oxton in the County of Chester, Consulting
Engineer, do hereby declare the nature of this invention to be as follows:-
During recent years the pressure of steam in steam generators has been con-
siderably increased. The flat parts of generators such as the ends of marine boilers,
and the surfaces of locomotive fire boxes have consequently required such close
staying that in some instances in marine boilers it has been impossible for a person
to pass between the stays and make examination. With the main objects of having
the plate or plates, heretofore made flat, with the metal as much as possible in
tension, consequently capable of withstanding greater pressure and the stay rods
further apart I press or form the ends and the like with dished parts, depressed in
the centre, and pass the stay rods through from depressed centre to depressed centre.
The advantages secured are (1) accessibility (2) less weight (3) greater strength
&(4) less cost.
Dated 11
A
וי
1000
Per pro J. T. KING,
W. B. Johnson,
Agent.
COMPLETE SPECIFICATION.
Improvements in Steam Generators.
I WILLIAM COOKE of Storeton Road Oxton in the County of Chester, Consulting
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 :-
During recent years the pressure of steam in steam generators has been con-
siderably increased. The flat parts of generators such as the ends of marine boilers
and the surfaces of locomotive fire boxes have consequently required such close
staying that in some instances in marine boilers it has been impossible for a person
to pass between the stays and make an examination. With the main objects of
having the plate or plates heretofore made flat, with the metal as much as possible
in tension, consequently capable of withstanding greater pressure and the stay rods
further apart I press or form the ends and the like with dished parts depressed
in the centre, and pass the stay rods through from depressed centre to depressed
centre having regard to the interior of the boiler that is to say :-When the dished
parts project into the boiler or generator the stays are connected to the centres of
the dished parts, but when the dished parts project outwards the portions of the
plates between the outwardly dished parts become the depressed centres as regards
the interior of the boiler or generator and the stays are connected to the plates
between the dished parts.
The advantages secured are (1) accessibility, (2) less weight, (3) greater strength,
1

page_text: dished parts project outwardly and the surfaces a of the plates become the
depressed centres to which the stays c are secured.
In Figs. 2 and 5 the dished parts 63 project outwardly and the parts ¿ª inwardly;
here the inwardly projecting dished parts 6' constitute depressed centres and are
provided with stays c. The plates a around the outwardly dished parts b³ also
constitute depressed centres having regard to the interior of the boiler or generator
and also provided with stays.
In Figs. 3 and 6 the dished parts 64 project inwardly so as to become depressed
centres, and have stays c secured centrally thereto.
It will be obvious that the dishing may be of any suitable shape and disposed in
any desired manner the stays being so attached that the parts are always in tension.
And further that the combustion chambers and other usually flat plates in marine
boilers may be dished in the manner already described.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
First. Steam generators having end plates and other usually flat parts dished in
combination with stays substantially as set forth.
Per pro J. T. KING,
J. Johnson,
Agent.