Improvements in Trueing Flanged Openings in Boiler Plates and the like.
Year: 1893

page_text: Date of Application, 31st July, 1893
Complete Specification Left, 28th Apr., 1894-Accepted, 9th June, 1894
PROVISIONAL SPECIFICATION.
Improvements in Trueing Flanged Openings in Boiler Plates and
the like.
We, JOHN BROWN AND COMPANY LTD. of Atlas Works Sheffield in the
County of York and JOSEPH NODDER of the same place, Ironworks Manager do
hereby declare the nature of this invention to be as follows:-
This invention relates more especially to the plates of boilers in which flanged
openings are made for the attachment of the furnace tubes. As the said plates
cool the openings and surrounding flanges become distorted and hitherto when
attempts have been made to restore the said openings and flanges to their proper or
original form local re-heating of the parts to be operated upon by hammering or
otherwise has been resorted to but this local re-heating has been found to have a
very injurious effect upon the metal and it is the object of this invention to effect
the restoration of the said openings and flanges to their proper or original form in
a manner such as to obviate the aforesaid injurious effect.
With this object the plate is first cooled and then whilst it is cold it is subjected
to the action of a device which operates upon the openings and their flanges in such
a manner as to bring them to their proper or original form.
preferably one which rotates and is expanded whilst it rotates.
Dated the 21st ST.,1- 1002
The device is
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
Improvements in Trueing Flanged Openings in Boiler Plates and
the like.
We JOHN BROWN AND COMPANY LIMITED of Atlas Works, Sheffield, in the
County of York and JOSEPH NODDER of the same place Ironworks Manager 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:-
This invention relates more especially to the plates of boilers in which flanged
openings are made for the attachment of the furnace tubes. As the said plates
cool the openings and surrounding flanges become distorted, and, hitherto, when
attempts have been made to restore the said openings and flanges to their proper,
or original form, local re-heating of the parts to be operated upon by hammering, or
otherwise, has been resorted to, but this local re-heating has been found to have a
very injurious effect upon the metal, and it is the object of this invention to effect
the restoration of the said openings and flanges to their proper, or original, form,
in a manner such as to obviate the aforesaid injurious effect.
With this object the plate, or the like, is first cooled, or allowed to cool, and
then, whilst it is cold, it is subjected to the action of a device which operates upon
the openings, and their flanges, in such a manner as to bring them to their proper,
or original, form. The device is preferably one which rotates, and is expanded
whilst it rotates, and apparatus such as is described in the Specification of our appli-
cation for Letters Patent No. 14680 of 31st July 1893 is well adapted for the purpose.
Pria 11

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
:-
Trueing flanged openings in boiler plates, and the like, by cooling the said plates,
or the like, or allowing them to cool, and then operating upon them, whilst cold
substantially as hereinbefore described, so as to bring them to their proper, or
original, form.
Doted this 50th day of Anil 1001
JOHNSONS & WILLCOX,
Agents.