Improvements in Die'or Cramping Apparatus for Pressing, Forming, or Shaping Articles of Metal.
Year: 1888

page_text: Date of Application, 29th Oct., 1888
Complete Specification Left, 29th July, 1889-Accepted, 7th Sept., 1889
PROVISIONAL SPECIFICATION.
Improvements in Die'or Cramping Apparatus for Pressing, Forming,
or Shaping Articles of Metal.
I, JOHN MUIR of 257 Saracen Street, Possil Park, Glasgow in the County of
Lanark, Engineer, do hereby declare the nature of this Invention to be as follows:-
This Invention which relates to apparatus for cramping metal plates to any desired
shape or configuration has more especially for its object the provision of a convenient
combination of mechanism for forming at one operation the improved "earth" or baso
plate for fencing standards and the like for which Provisional Protection No. 7240
of 1888 has been granted to Robert Ramsay Main of Clydesdale Iron Works, Possil
Park, Glasgow.
The improved apparatus constituting this Invention consists of a metal frame or
box wherein there are centred two dies or jaws arranged to work through an are
transversely to the length of the frame or box, these jaws or dies having their meeting
faces so shaped as to produce in conjunction with a mandril and pressure applied by a
steam hammer, hydraulic press or equivalent apparatus a crease or channel at the
centre of the plate of a shape corresponding to that of the standard to the base of
which the plate is to be applied. In line with the meeting edges of the jaws. or dies
two guides project vertically from the top of the frame or box and the metallic plate
to be operated upon having been laid in rests on the top of the box and above the
jaws or dies, the mandril is laid across the top of the plate being held in proper position
by the said guides. At this part of the operation the meeting faces of the jaws or
dies are held away from each other by springs which are so tempered as to maintain
the jaws apart until the hammer or ram of the press acting on the mandril has creased
the plate into the space between them. This being effected the continued pressure
of the hammer or ram overcomes the resistance of the springs and completes the
shaping of the channel by drawing or forcing the meeting edges of the jaws or dies
towards each other.
Simultaneously with this latter part of the operation the bent over wings, shoulders
or flanges described in R. R. Main's Provisional Specification are produced at the
corners of the plate by two dies secured to the top of the frame or box, the head of
the hammer or ram of the press being so shaped as to enter within these dies and
bend or double over the corners of the plate. To prevent the moving jaws or dies
from working too far downwards a bridge or rest extends, across the frame or box
against which the lower surfaces of the jaws or dies rest or with which they come in
contact.
"
Besides being used to produce the "earth or base plate before referred to the
apparatus bereinbefore described may be employed in forming or shaping other
articles.in metal the meeting faces of the moving jaws, the mandril and the head of
the hammer or ram being shaped according to the contour desired to be given.
Dated this Twentyseventh, day of October 1888.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
Improvements in Die, or, Cramping Apparatus for Pressing, Forming,
or. Shaping. Articles of,,Metal.
I, JOHN MUIR of 257 Saracen Street, Possil Park, Glasgow, in the County of
Lanark, 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:—
This Invention which relates to apparatus for cramping. metal plates to
any :desired

page_text: shape or configuration has more especially for its object the provision of a convenient
combination of mechanism for. forming at one operation the improved "earth" or
base plate for fencing standards and the like for which Letters l'atent No. 7240 of
1888 have been granted to Robert Ramsay Main of Clydesdale Iron Works, Possil
Park, Glasgow.
Improved apparatus constructed in accordance with this Invention is illustrated on
the annexed drawings and as shewn in side elevation at figure 1, in plan at figure 2
and in longitudinal section at figure 3 sheet 1 it consists of a metal frame or box A
wherein there are centred two dies or jaws B arranged to work through an are
transversely to the length of the frame or box. The jaws or dies are carried on
spindles C which pass through and have their bearings in the sides of the box, or the
jaws or dies may have trunnions or studs formed on them at each side in which case
the sides of the box A, have recesses or shoulders as at 1) figure 4 for the trunnions to
rest and work in. The dies or jaws B have their meeting faces so shaped as to
produce, in conjunction with a mandril E, and pressure applied by a steami hammer,
hydraulic press or equivalent apparatus, a crease or channel at the centre of the plate.
being treated of a shape corresponding to that of the standard to the base of which
the plate is to be applied. In line with the meeting edges of the jaws or dies B,
guides F. F project vertically from the top of the sides of the frame or box A and
the metallic plate H to be operated upon having been laid in rests G on the top of the
box and above the jaws or dies, the mandril E which is illustrated in detailed plan
and end elevation respectively at figures 5 and 6 sheet 1, is laid across the top of the
plate being held in proper position by the guides F as at figure 1. As also seen by
the said figure the meeting faces of the jaws or dies B are at this part of the operation
kept away from each other in which position they may be held by springs I as
indicated in dotted lines the said springs being tempered to maintain the jaws apart
until the hammer or ram J of the press acting on the mandril E has creased the plate
into the space between them, or the jaws may be so balanced on the spindles or
trunnions and weighted at their outer ends as to maintain themselves apart until the
crease has been formed on the plate as indicated at, K. figuré 3, and at figures 7 and 8
the latter figures being an elevation and plan of the plate covered by Robert
Ramsay Main's said Patent. When the crease K has been produced, (and in forming
which the plate H being diminished in length is drawn off the rests G) the continued
pressure of the hammer or ram J overcomes the resistance of the springs or the back
balance of the jaws and completes the shaping of the channel by drawing or forcing
the meeting edges of the jaws or dies towards each other. Simultaneously with this
latter part of the operation the bent over wings, shoulders or flanges d are produced'
at the corners of the plate by two dies L, secured to the top of the frame or box, the
head of the hammer or ram J, as more particularly seen at M figure 9, which is a
plan of the acting face, being so shaped as to enter within these dies and bend or
double over the corners of the plate.
Figure 10 is a side elevation of the hammer J which is recessed at N to pass
the guide F and at O to receive the rests G. To prevent the jaws or dies from
working too far downwards a bridge or rest P extends across the frame or box A
against which the lower surfaces of the jaws or dies rest or with which they come
in contact in the act of finishing the pressure on the plate.
Figure 1, sheet 2 of the drawings, illustrates partly in side elevation and partly
in vertical section and figure 2 illustrates in plan the improved apparatus as arranged
to produce the form of plate shewn by figures 5 and 6 of the drawings under
Robert Ramsay Main's said Patent for which purpose the jaws or dies B are
made as shewn and the hammer J is hollow faced and has parts J' which press
the corners of the plates against die faces on the side of the box to produce the
wings d.
i
Figure 3 sheet 2 illustrates partly in elevation, partly in vertical section and
figure 4 illustrates in plan the improved apparatus as adapted to produce or crease
from flat plates ferrules or tubular sections for fencing purposes. In this adaptation
rests G are secured or laid in adjustable straps R which are bolted to the top of

page_text: the frame or box A the plate to be operated on being laid on the said rests.
This being done the mandril E is inserted in the guides F, F¹, so as to lie upon
the plate and the hammer J is then brought down so as to press upon the mandril
and bend the plate downwards taking it off the rests G the operation of closing
the tube or ferrule being completed by the jaws B as before set forth.
As seen by figures 3 and 5 the hammer has a V shaped plate screwed to its face
the ends of the said plate acting on the mandril whilst the ferrule or tube is
contained in the space between them.
.
Besides being used to produce earth plates and ferrules for fencing purposes the
apparatus herein before decribed may be employed in forming or shaping other articles
in metal the meeting faces of the moving jaws, the mandril and the head of the
hammer or ram being shaped according to the contour desired to be given.
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. The arrangement and combination of mechanism constituting the die or cramping
apparatus, substantially as hereinbefore described with reference to the several figures
on sheet 1 of the accompanying drawings.
2. The arrangement and combination of mechanism constituting the die er cramping
apparatus, substantially as hereinbefore described, with reference to figures 1 and 2,
sheet 2 of the drawings.
3. The arrangement and combination of mechanism constituting the die or cramping
apparatus, substantially as hereinbefore described, with reference to figures 3, 4 and 5,
sheet 2 of the appended drawings.
4. In apparatus for cramping, pressing, forming or shaping articles in metal a box
or frame carrying two movable cramping jaws, rests and guides formed on or secured
to the said frame, dies secured to the said frame, and a mandril all operating in
combination and under pressure to produce the desired shape of article substantially
as described.
Dated this Twenty seventh day of July 1889.
a
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow, Agents.