Improvements in Apparatus for Dishing Plates to Form Drum Heads or Ends of Sectional Boilers and the like.
Year: 1893

page_text: Date of Application, 2nd Sept., 1893-Accepted, 10th Mar., 1894
COMPLETE SPECIFICATION.
[Communicated from abroad by THE BABCOCK & WILCOX COMPANY, of New
York, in the United States of America, Steam Boiler Manufacturers.]
Improvements in Apparatus for Dishing Plates to Form Drum
Heads or Ends of Sectional Boilers and the like.
I, WALLACE FAIRWEATHER, C.E. of 62 Saint Vincent Street in the City of
Glasgow, Chartered Patent Agent, do hereby declare the nature of this invention
and in what manner the same is to be performed as communicated to me to be
particularly described and ascertained in and by the following statement :-
This invention relates to apparatus for dishing plates to form drum heads or
ends of sectional boilers and like dished or cupped plates and it consists mainly in
the provision of devices for freeing the drum head or dished plate from the dies of
the press in which the dishing operation is effected.
In the accompanying drawings which illustrate the invention
Figures 1, 2 and 3 are vertical sections shewing part of a hydraulic press with
the dies in different positions.
Figure 4 is a plan of the top block of the press and Figure 5 a horizontal section
of the same.
Figures 6, 7 and 8 are views in detail of one of the cylinders employed for
effecting the release of the plate from the male die.
The head of the press A which is or may be of ordinary construction has secured
to it a block B fitted with a series of cylinders C, there being four in the present
instance and a male die D down past the sides of which the plungers C of the
cylinders extend and bear upon a contraction ring d fitted in sections around the
die D. The female die D' rests upon the platen A¹ of the press and is kept in
position relatively with the male die by means of guide rods d¹.
The plate P to be operated on is placed in position over the lower die D' as
shewn at Figure 1 and is pressed between the dies as shewn at Figure 2 by the
action of the press.
When the dishing operation has been thus effected and the
main ram of the press relieved water is admitted to operate the four cylinders C
the rams C of which descend striking the upper edge of the sections of the
contraction ring d which in turn bear on the drum end P which with the ring d
is forced off the die D as shewn at Figure 3. The sections of the ring d are
then easily removed as they lie loose inside of the dished head.
The dies as
shown are of a form adapted for dishing drum heads of sectional steam boilers
but they may be of any other form.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, as communicated to
me, I declare that what I claim is :-
1. The combination of parts constituting the improved apparatus for dishing
plates substantially as hereinbefore described with reference to the annexed
drawings.
2. In a plate dishing press the combination with the male die of the press of the
contraction ring d and a series of rams adapted to act thereon substantially as and
for the purpose set forth.

page_text: 3. In a plate dishing press the combination with the male die of a contraction
ring made in sections so as to be removable from the dished plate substantially as
set forth.
Dated this 1st day of September 1893.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.