Improvements in Metal Plates, Especially for Use in the Construction of the Shells, Flues, and Fire Boxes of Marine, Locomotive, Stationary, and other Boilers, and for Girder Work and other Analogous Purposes.
Year: 1887

page_text: Date of Application, 4th Jan., 1887
Complete Left, 4th Oct., 1887
Complete Accepted, -11th Nov., 1887
Improvements in Metal Plates, Especially for Use in the
Construction of the Shells, Flues, and Fire Boxes of Marine,
Locomotive, Stationary, and other Boilers, and for Girder Work
and other Analogous Purposes.
I ROBERT LORD of 109 Spring Street, Bury, Lancashire, Boiler maker, do hereby
declare the nature of my invention to be as follows:-
The object of this invention is to so treat metal plates and especially steel and
iron boiler plates that without increasing the weight or thickness of the plate the
same shall be considerably strengthened stiffened and rendered more rigid and
suitable for the before-mentioned purposes.
In performing my invention I either roll stamp or hammer the entire surface of
the plate (with the exception of the parts to be rivetted or jointed together or to
other parts) so as to form therein a series of dimples bulges or depressions which
not only strengthens and stiffens the plate in a lateral longitudinal and other
direction but also considerably extends the surface thereof-a consideration of great
moment in the construction of the flues and other parts, of steam boilers as the heating
surface is thus proportionately increased.
In this manner I construct a boiler plate or flue which forms an effective substitute
for the corrugated plates or flues now in use and which method of strengthening
plates is also applicable in the construction of girder work and for other analogous
purposes where great strength and rigidity are required.
Dated this 2nd day of January 1887
JOHN G. WILSON,
Agent for the Applicant.

page_text: с
Improvements
in Metal Plates, Especially for Use in the
Construction of the Shells, Flues, and Fire Boxes of Marine,
Locomotive, Stationary, and other Boilers, and for Girder Work
and other Analogous Purposes.
I ROBERT LORD of 109 Spring Street, Bury, Lancashire, Boiler maker, do
hereby declare the nature of my invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
The object of this invention is to so treat metal plates and especially steel and iron
boiler plates that without increasing the weight or thickness of the plate the same
shall be considerably strengthened stiffened and rendered more rigid and suitable for
the before mentioned purposes.
In performing my invention I either roll stamp or hammer the entire surface of
the plate (with the exception of the parts to be riveted or jointed together or to other
parts) so as to form therein a series of dimples bulges or depressions which not only
stiffens the plate in a lateral longitudinal and other directions but also considerably
extends the surface thereof-a consideration of great moment in the construction of
the flues and other parts of steam boilers as the heating surface is thus proportionately
increased.
And in order that this my said invention may be more readily understood and
carried into practical effect I have hereunto annexed a sheet of drawings illustrating
several modifications of my invention.
Fig. 1. represents an exterior view or plan of a boiler plate embracing my improve-
ments and Fig. 2. is a side sectional view of Fig. 1.
Figs. 3 and 4. are similar views of another boiler plate shewing a modification of
my invention.
Fig. 5 is an exterior view and Fig. 6. a transverse section of a length of boiler flue
constructed in accordance with my invention.
In all the Figures, a. a. a are the dimples or bulges formed in the surface of the
piate and which on the opposite side of the same plate constitute corresponding
depressions or hollows marked b. b. b. These dimples or bulges are rolled stamped
hammered or otherwise formed over the entire surface of the plate and thus not only
strengthen and stiffen the same but it will also be apparent that by so treating it the
surface of the plate is considerably extended.
In Fig. 1. the dimples are shown of a circular form and in Fig. 3. of an oblong or
oval form and in alternate directions.
In Figs. 5 and 6 I illustrate a boiler plate or flue which forms an effective substitute
for the corrugated plates or flues now in use. It is found in practise that the use of

page_text: this improved plate in the construction of boiler flues presents no obstacle to the
insertion of Galloway tubes (as indicated by letter c in Fig. 5) therein and which can
either be welded or flanged and rivetted in position.
This improved method of treating and strengthening plates is also applicable in the
construction of the fire boxes of Marine, Locomotive, Stationary and other boilers and
for girder work and for other analogous purposes whore great strength and rigidity
are required.
Having thus particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is :-
1st. The improved manufacture of boiler and other plates substantially as and for
the purposes hereinbefore described and illustrated on the accompanying drawing.
2nd. The improved construction of boiler flue substantially as herein before
described and illustrated on the accompanying drawing.
3rd. The improved method of treating and strengthening boiler and other plates
substantially as hereinbefore described.