Improvements in Steam Generators.
Year: 1894

page_text: Date of Application, 14th June, 1894
Complete Specification Left, 13th Apr., 1895-Accepted, 18th May, 1895
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators.
JAMES BLAKE Marine House Redcar, Yorkshire Engineer, do hereby declare
the nature of this invention to be as follows:
My invention relates principally to former inventions for which Letters Patent
dated the Twenty fourth day of December in the year One thousand eight
hundred and seventy eight and numbered 5254 and Letters Patent dated the
Fifth day of September in the year One thousand eight hundred and eighty one
and numbered 3848 have been granted to me and has for its object to obtain greater
strength in the fireboxes of the vertical and locomotive boilers represented in the
drawings illustrative of my said former inventions and consists in constructing the
conical shaped fireboxes with circumferential corrugations or ridges extending
either wholly or partially round the cone or in substituting a firebox formed by.
connecting together two or more parallel or taper rings the said rings being suitably
flanged or shaped at either or both ends for attachment to each other.
I may apply the aforesaid constructions of firebox to vertical boilers generally.
Dated this Eleventh day of June 1894.
JAMES BLAKE Linthorpe Avenue Middlesbrough Yorks 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 principally to former inventions for which Letters Patent
dated the Twenty fourth day of December in the year One thousand eight
hundred and seventy eight and numbered 5254 and Letters Patent dated the
Fifth day of September in the year One thousand eight hundred and eighty one
and numbered 3848 have been granted to me and has for its object to obtain greater
strength in the fireboxes of the vertical and locomotive boilers represented in the
drawings illustrative of my said former inventions and consists in constructing the
conical shaped fireboxes with circumferential corrugations or ridges extending
either wholly or partially round the cone or in substituting a firebox formed by
connecting together two or more parallel or taper rings the said rings being suitably
flanged or shaped at either or both ends for attachment to each other.
Fig. 1 is a sectional elevation of a conical firebox having circumferential
corrugations or ridges a extending wholly or partially round the periphery of the
cone in accordance with my invention.
Fig. 2 is an enlarged section of a part of the firebox and Fig. 2ª shews an
enlarged section of the corrugations or ridges a. I form the corrugations or
ridges a so that no part of the protuberance is larger in diameter than the
contiguous conical part below it and I preferably make the upper part b slightly

page_text: smaller in diameter than the lower part c to facilitate the withdrawal of the
pressing die.
Fig. 3 is a sectional elevation of a conical firebox contracted and strengthened
by means of the corrugation d.
Fig. 4 is a sectional elevation of a firebox of tapering configuration formed by
connecting together three rings e. f. g the rings ƒ and g being flanged at their
lower ends for attachment of the rings to each other and also to obtain great
diametrical strength.
Fig. 5 shews a modified construction in which the taper ring e is mounted by
the two parallel rings f. g. flanged and connected together at s to complete the
firebox.
Fig. 6 shews the conical firebox formed of two taper rings e and strengthened
and connected together by the Adamson joint k.
Fig. 7 shews a modified construction the firebox being formed by connecting
together two taper rings strengthened by the connecting flange m.
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 :-
1. Constructing conical fireboxes with circumferential corrugations or ridges of
the peculiar form as set forth and indicated hereinbefore and by Figs. 1, 2 and 2ª
of the drawings.
2. The fireboxes formed and constructed substantially as set forth and indicated
hereinbefore and by the accompanying drawings.
Dated this Eleventh day of April 1895.
JAMES BLAKE.