Improvements in Steam Generators.
Year: 1894

page_text: Date of Application, 20th Mar., 1894
Complete Specification Left, 19th Dec., 1894-Accepted, 19th Jan., 1895
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
JOHN PRESTON Stowage House Deptford S.E. Superintending Engineer do
hereby declare the nature of this invention to be as follows:-
The introduction of corrugated or ribbed plates in the construction of combustion
chambers for land & marine boilers & thereby strengthening them in such 'a
manner as to obviate as far as possible the present system of screwed stays & also
to give an increased heating surface.
The above plates may be corrugated or ribbed either vertically or longitudinally
as may be desired. The said corrugations or ribs to be either of uniform or
varying depths, tapering off twords the ends of the plates & decreasing in depth
twords the sides.
Dated this 20th day of March 1801
Improvements in Steam Generators.
I, JOHN PRESTON, of Stowage House, Deptford, in the County of Kent,
Superintendent 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 :-
My invention relates to an improved method of staying combustion chambers of
steam generators, and it consists in forming in or on the sides, back, crown and
bottom plates a series of corrugations or ribs, the object being to stay the combustion
chamber without the usual water space stays.
In the accompanying drawing which-by way of example only-illustrates my
invention:
Figure 1 is a broken view in plan of the side of a combustion chamber showing
the application of my invention.
Figure 2 is a broken view in plan of the back of a combustion chamber embodying
my invention, and
Figures 3 and 4 are broken views in section showing the corrugations of the
side and back plates repectively.
Throughout the views similar parts are marked with like letters of reference.
According to my invention, I form in or on the plates for the sides, back, crown
and bottom of the combustion chamber a series of corrugations, undulations or
ribs a, a, etc. These may be formed by rolling, stamping, pressing or casting and
may be arranged either vertically, horizontally or diagonally or a combination
thereof. The corrugations or ribs may moreover be of any desired section and
shape, according to the size of the combustion chamber.
By my invention I obtain the following advantages:-
First. Free expansion and contraction of the heated plates.
Second. Increased heating surface without increasing the size of the chamber.

page_text: Third. Freer circulation owing to the absence of the water space stays, and
Fourth. Increased generation of steam resulting from the plates being easily
kept clean.
I wish it to be particularly understood that I do not limit myself to the precise
details of construction hereinbefore described and illustrated by the accompanying
drawing, but that I hold myself at liberty to make such changes and alterations as
fairly fall within the spirit and scope of my invention.
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 :-
1. The improved method of staying the combustion chambers of steam
generators, substantially as set forth.
2. Staying or stiffening the plates forming the sides, back, crown and bottom
of the combustion chambers of steam generators by forming therein or thereon a
series of corrugations or ribs, as set forth.
Dated this 10th t
1004
ROBERT E. PHILLIPS, M.I.M.E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C., Agent for the Applicant.