IMPROVEMENTS IN THE MODE OF STAMPING CORRUGATED IRON AND STEEL PLATES
Year: 1883

page_text: LETTERS PATENT to Robert Baillie of the London Yard Isle of Dogs in the
County of Middlesex Engineer for an Invention of IMPROVEMENTS IN THE
MODE OF STAMPING CORRUGATED IRON AND STEEL PLATES
PROVISIONAL SPECIFICATION left by the said Robert Baillie at the Office
of the Commissioners of Patents on the 3rd September 1883.
ROBERT BAILLIE of The London Yard Isle of Dogs in the County of Middlesex
Engineer 'IMPROVEMENTS IN THE MODE OF STAMPING CORRUGATED IRON AND
"
STEEL PLATES
"
In the method of stamping and forming corrugated plates hitherto practised, it
has been usual to operate on the plate by the action of an upper and lower or male
and female die adapted to produce all the corrugations at one operation thereby
rendering the plate liable to injury and defect in its edges.
Now under my Invention the upper die is formed with a centre piece which is
moveable and may be caused to project below the rest of the die in which position
it is fixed by means of a stop or stops. When the block carrying the upper die is
now brought down upon the plate resting on the lower fixed die the central
corrugations are formed in the plate without holding or gripping the edges of the
plate as by the ordinary method.
During this operation the said moveable or sliding part of the upper die is kept
in its lowered position by the stop or stops which is or are inserted or placed
between the upper surface of the sliding portion of the die and the upper block
After the central corrugations have been formed the stop or stops is or are
removed and the sliding portion of the die is allowed to rise until its lower surface
becomes level with the outer portions of the upper die when the blocks and
dies being brought together the remaining corrugations can be formed in the
usual way.
By stamping the plate in the manner stated a greater depth of corrugations
can be produced therein.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Baillie in the Patent Office on the 29th February 1884.
ROBERT BAILLIE of The London Yard Isle of Dogs in the County of Middl-sex
"IMPROVEMENTS IN THE MODE OF STAMPING CORRUGATED IRON AND STEEL
PLATES
"
In the method of stamping and forming corrugated plates hitherto practised it
has been usual to operate on the plate by the action of an upper and lower or
male and female die adapted to produce all the corrugations at one operation
thereby rendering the plate liable to injury and defect in its edges.
Now under my Invention the upper die is formed with a centre piece which is
moveable therein and may be caused to project below the rest of the die in which
position it is fixed as required by means of a stop or stops.
When the parts are in these relative positions with one of the dies fixed and the
other moveable if the moveable die be forced towards the fixed die with the plate
inserted between them the central corrugations will be formed in the plate without
holding or gripping the edge of the plate as by the ordinary method.
During this operation the said moveable or sliding part of the upper die is
kept in its lowered position by the stop or stops which is or are inserted or placed
between the upper surface of the sliding portion of the die and the upper block
After the central corrugations have been formed the stop or stops is or are
removed and the sliding portion of the die is allowed to rise until its lower
surface becomes level with the outer portion of the upper die when the blocks
and dies being brought together the remaining corrugations can be formed in the
usual way.
By stamping the plate in the manner stated a greater depth of corrugations can
be produced therein.
Having thus stated the nature of the said Invention I will proceed to describe
more particularly in what manner the same is to be performed by the aid of
the accompanying Drawings in which are represented the parts of apparatus above
referred to
DESCRIPTION OF THE DRAWINGS
Fig 1 is a side elevation of the apparatus or press ready to receive the plate
Fig 2 is a similar view with the lower block or die raised and the upper centre
die clamped Fig 3 is an end view corresponding with Fig 1, Fig 4 is a vertical
section shewing the plate resting on the lower block or die and the central
portion of the upper block or die in its lowered position ready to operate on the
plate Fig 5 is a section shewing the lowered block or die raised so as to form the
central corrugations and Fig 6 is a section shewing both blocks or dies brought
together with the finished plate between them In these several figures the same
letters of reference indicate corresponding parts
A is the upper block or die which is or may be stationary B is the lower block
or die which is or may be raised as required in order to produce first the central
corrugations in the plate and afterwards the outer corrugations, C is the centre
die or sliding portion of the upper block or die which is capable of being slidden
or moved into the different positions shewn in Figures 3. 4. 5 and 6
D D are
stops for keeping the centre die C in its lowered position as required-These stops
are fixed on a slide E so as to admit of their being simultaneously moved by
means of this slide so as to be brought opposite to apertures in the upper block or
die A by entering which the two blocks or dies A and B are allowed to come

page_text: together to effect the further operation on the plate F as required G is a clamp
pivotted on the centre die C for the purpose of fixing this die to the base plate H
as required.
The working of the apparatus or press is as follows The heated plate F
is drawn from the furnace and introduced into the press at I it is then
forced up into the die C by hydraulic power acting so as to raise the lower
block or die B into the position shewn in Fig 5 thereby forming the central
corrugation-During this operation the slide E has been in the position shewn in
Fig 1 with the stops D D as indicated by dotted lines the slide E is now pushed
into the position shewn in Fig 2 carrying with it the stops D D and bringing
them opposite the apertures in the upper block or die A and the centre die C is
clamped to the base plate H The lower block or die B is then forced upwards
into the position shewn in Fig 6 thereby completing the outer corrugations in
the finished plate.
The above operations of first forming the central corrugations in the plate and
afterwards forming the outer corrugations therein may be performed either by
making the upper block or die stationary and the lower one moveable as described
or by making the lower block or die stationary and the upper one moveable-But
the arrangement as described is more convenient in practice as the hydraulic
power can then be employed merely to raise the block or die which can return to
its lower position by gravity.
Having thus described the nature of the said Invention and in what manner
the same is to be performed I hereby declare that what I claim as of my
Invention is.
First The stamping of corrugated iron and steel plates with deepened
corrugations by forming first the central corrugations in the plates and afterwards
forming the outer corrugations therein substantially as hereinbefore described.
And secondly The use for the purpose of a sliding centre die in the upper
block or die combined with stops adapted respectively to retain the centre die
in its lowered position and allow it to slide into the upper block or die in the
manner substantially as herein before described.
In witness whereof I the said Robert Baillie have hereunto set my hand and
seal this twenty eighth day of February in the year of our Lord One thousand
eight hundred and eighty four.
ROBERT RAILTTE
.
ROBERT BAILLY
(L.B.)