Improvements in the Manufacture of Metal Boats and Machinery therefor.
Year: 1890

page_text: Date of Application, 20th Mar.. 1890-Accepted, 26th Apr., 1890
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Metal Boats and Machinery
therefor.
I, WILLIAM HESLOP of 91 Bruce Street, New Wortley, Leeds in the County of
York, 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 :-
In the specification of a Patent dated the 9th May 1889 No. 7801 I have
described and shewn in the drawings certain constructions of dies wherein the sections
composing such dies are arranged so as to join transversely and also centrally in a
longitudinal direction, now in the course of my experiments I have found that for
some purposes it is advantageous to form the dies with more than one longitudinal
join, that is, by again dividing them in planes parallel and not perpendicular to the
line of the keel.
The dies of the presses so constructed in sections divided in planes parallel to the
line of the keel as aforesaid are also suitable for stamping plates to form halvos of
boats.
In order to impart the desired form or shape to the plates, each plate of metal such
as mild steel having been cut roughly to form is heated to a suitable temperature (say
900° Fahrenheit or thereabouts) or say to a bright red beat and pressed or stamped to
the required form. The form may be completed at one operation or the plate may bo
heated again once or as often as required, and whilst hot subjected to a further pressing
or stamping operation or operations, whereby the proper formation of the plates is
eventually produced.
The male and female dies give the desired form to the plates gradually or at one
operation.
The female die may conveniently be (as shewn in Fig. 1) mounted on a rising
table or platform, actuated by hydraulic or other suitable mechanism, above this is
fixed a plate or beam to which is attached the male die, each die corresponding in
form to the general configuration required to be imparted to the metallic plates
necessary for the formation of the above mentioned boats.
The forms of the male and female dies are subject to variations which are dependant
entirely on the shape or size of the boat to be produced.
The female die or matrix is or may be fixed to the rising table or platform, and is
made up of longitudinal and transverse sections bolted together at their respective
joints so that any number of sections can be removed from or added to the main
structure of the die for the purpose of reducing or increasing the size of such die, in
accordance with the required size of boat or otherwise. The male die is or may be
fixed to the aforesaid plate or beam and is also made up of sections corresponding with
those of the female die such sections being bolted together in a similar manner and
may be reduced or increased in number to suit the size of the required boat.
The dies for forming the various parts may be heated to any required extent for the
operation of pressing and to prevent chilling of the metal during such operations, and
the metal for the various parts of the boats may be heated any number of times as may
be required during the process of manufacture.
When the boats are required to be made very wide at the beam I preferably
use the same size of plates as those for the boats having narrower beans,
but such plates may be produced by welding several narrow plates together if
desired. In using such plates the top line or edge of the boat after being pressed
or stamped out leaves a curved gap-the depth of such curve or gap at the beam
depending upon the width of the boat relatively to the width of the plate at such
beam.

page_text: I fill in the curved parts or gap to the correct line or gunwale of the boat
with metal plates, such metal plates being rivetted or welded to those forming the
main structure.
My invention will be best understood by reference to the accompanying drawings
in which Figs. 1 to 4 illustrate an example of a pair of longitudinally and
transversely divided dies constructed and arranged according to my invention, and
of such form or configuration as would be suitable if it was desired to stamp the
boats in separate halves which might be afterwards fitted together. Fig. 1 being
a side elevation of a portion of the hydraulic press carrying and actuating the
dies, the said dies thereof being shewn in vertical section taken on the line EF
of Fig. 3. Fig. 2 is a horizontal section through G H of Fig. 4 shewing the
male die. Fig. 3 is a plan of female die with plate in position as it would appear
after being pressed and Fig. 4 is a transverse section of such a pair of dies. Fig. 5
shews in transverse section a pair of longitudinally and transversely divided dies of
such form or configuration as would be suitable for stamping seamless metal boats.
Fig. 6 is a side elevation and Fig. 7 is a transverse section shewing a boat
the lower part of the hull of which has been formed seamless and the sides left
with a gap or curve therein and afterwards filled up as shewn.
Referring to Figs. 1 to 5, 1 Fig. 1 is the head or beam of the press to which is
fixed a male die A of suitable form or configuration, B is a female die carried by the
rising and falling table or platen 2 of the press such press being shewn in the Speci-
fication of my patent 7801-9th May 1889.
The male die A. Figs. 1, 2 & 4, is made or built up of a suitable number of sectional
parts 11 and 12 and joined as to be capable of separation at a suitable number of
points in a direction transversely or at right angles to the length of the die and also
capable of separation at a suitable number of points (that is more than one) in a
direction parallel with the length of the die-11 represents the outer sections and 12
the intermediate sections.
The female die B is shewn made or built up in a similar manner to that described
with reference to the die A.-3 represents the outer sections and 4 the intermediato
sections.
The sections are bolted together at their respective joints, and the bolt holes may
in some cases be slotted to admit of relative adjustment of the sections if found
desirable or necessary.
The sizes and forms of the dies and of the sections composing the same may be
varied according to circumstances, and such dies may be heated once or oftener all as
found necessary without departing from my invention, and it will be readily under-
stood that boats may be stamped by dies constructed as hereinbefore described either
seamless or in halves or parts, and by such a construction of dies I am enabled to
either widen or make the boat to be stamped broader or reduce its width by changing
or removing the intermediate sections of the dies in accordance with the desired
alteration of width, or the length of the boat may be altered by suitably changing
transverse rows of sections.
The construction of dies shewn at Figs. 1 to 5 being now understood it will there-
fore be obvious that the dies both male and female may be made of such sections as
to be capable of being separated at horizontal planes as well as at the vertical planes
and when thus constructed the boats formed thereby may be varied in length width
and depth without wholly changing the dies.
When boats are required to be inade of very large size or extremely wide at the
beam and especially in cases where it would be difficult to obtain or work plates of
great width, I then employ a plate of the requisite length but of less than the required
width, and, so that the boat when stamped will have a gap or curved part at the sides
the depth of such curve or gap varying as the width of the plate relatively to the
depth and beam of the boat.
This gap I fill in with a piece of plate of suitable shape which is fixed by rivetting
or welding.
Such a mode of manufacture is clearly illustrated at Figures 6 and 7 wherein

page_text: 16 indicates the hull proper and 17 the piece of metal for filling up the gap left
therein by the plate from which the hull proper was stamped not having been of
sufficient width.
When of great size, such boats might be formed with the hull proper formed from
two pieces of metal and afterwards welded or rivetted together along the keel and the
gaps filled in as herein described.
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. In machinery for the manufacture of metal boats, the use and employment of
male or female dies or both, composed of sectional parts divided and joined together
in planes transversely to the length, and also in more than one plane parallel with the
length of the said die substantially as set forth.
2. In machinery for the manufacture of metal boats the combination with the side
sectional parts of the centrally situated sectional parts whereby dies are capable of
being made wider or narrower as well as longer or shorter as desired all substantially
as set forth.
3. In the manufacture of sheet metal boats, stamping the lower part of the hull
from one sheet of metal of sufficient length but of insufficient width whereby a gap
on either side is left to be afterwards completed by affixing plates thereto and a boat
is formed baving a seamless lower hull stem and stern substantially as set forth.
4. In the manufacture of sheet metal boats forming the hull out of two pieces of
metal of sufficient length but of insufficient width whereby a gap on either side is
left to be afterwards completed by affixing plates thereto substantially as set forth.
Dated this 20th day of March 1890.
J. W. HARDING,
Agent for the Applicant.