IMPROVEMENTS IN COINING PRESSES to be as follows
Year: 1884

page_text: I JAMES MURDOCH NAPIER of York Road Lambeth in the County of Surrey
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
COINING PRESSES to be as follows :—
"
My improvements refer to lever coining presses in which the upper die is fixed.
Such a press is described in the specification of my Patent dated 21st August 1867
No 2398 and is illustrated especially by Figures 4. 5 and 6 of the drawings N° 1.
The object of my improvements is the more convenient feeding of the coin blanks
to the dies.
The most convenient sort of feeder consists in a slide with a hole in it moving to
and fro beneath a hopper containing the blanks and over the die on which they are
required to be deposited.
But in order that such a feeder may be employed it is requisite that the lower
die should have appropriate motions imparted to it. With this end in view
I actuate the die or its seat or bed so as to cause it to dip as soon as the coin blank
next to be coined is placed upon it. The blank is thus lowered into the collar and
then the feeding slide can retire over the blank without displacing it.
The front part of the feeding slide is formed for displacing the last struck coin
from the die as it advances with the on-coming blank.
In connection with the feeding slide there is a moveable part which takes its
place above the blank during its passage from the feeding hopper to the die to
ensure its being kept in its position in the feeding slide.
Instead of causing the lower die to dip after the blank is placed upon it it may
if preferred remain stationary and the slide and collar be actuated to rise so that
the collar surrounds the blank and the slide can retire over the blank without
disturbing it. In this arrangement the hopper rises and falls in conjunction with
the slide and the plate or platform upon which it works. The upper part of the
hopper may however be fixed and fitted so as to allow of the rising and falling of
the lower part. The collar may be actuated in its rising and falling by the same
means as the slide and in conjunction with it or if preferred it may be actuated by
separate parts suitably timed. In the latter case the extent of the rise and fall of
the slide inight be reduced.

page_text: The machine is provided with a disengaging clutch to be operated upon by the
hand for stopping the press instantaneously and if preferred by automatic means in
case of the feeding slide failing to place a blank.
The fly wheel is connected by frictional means in case of the dio being adjusted
too close or from other cause its momentum would operate to give an excess of
pressure a slip may take place saving any undue strain on the working parts and
press head.
It is advantageous to employ two fly wheels to equalize the strain on the crank
shaft.
Dated thi. 04th dow of Mount 100
COMPLETE DEPORT
VATION.
I JAMES MURDOCH NAPIER of York Road Lambeth in the County of Surrey
Engineer do hereby declaro the nature of my invention for "IMPROVEMENTS IN
COINING PRESSES and in what manner the same is to be performed to be par-
ticularly described and ascertained in and by the following statement :—
"
My improvements refer to lever coining presses in which the upper die is fixed.
Such a press is described in the Specification of my Patent dated 21st August 1867
No 2398 and is illustrated especially by Figures 4. 5 and 6 of the Drawings No 1.
The object of my improvements is the more convenient feeding of the coin blanks
to the dies.
The most covnenient sort of feeder consists in a slide with a hole in it moving
to and fro beneath a hopper containing the blanks and over the die on which they
are required to be deposited.
But in order that such a feeder may be employed it is requisite that the lower die
should have appropriate motions imparted to it. With this end in view I actuate
the die or its seat or bed so as to cause it to dip as soon as the coin blank next to
be coined is placed upon it. The blank is thus lowered into the collar and then the
,feeding slide can retire over the blank without displacing it.
The front part of the feeding slide is formed for displacing the last struck coin
from the die as it advances with the overcoming blank.
In connection with the feeding slide there is a moveable part which takes its
place above the blank during its passage from the feeding hopper to the die to
ensure its being kept in its position in the feeding slide.
Instead of causing the lower die to dip after the blank is placed upon it, it may
if preferred, remain stationary and the slide and collar be actuated to rise so that
the collar surrounds the blank and the slide can retire over the blank without
disturbing it.
In this arrangement the hopper rises and falls in conjunction with the slide and
the plate or platform upon which it works. The upper part of the hopper may
however be fixed and fitted so as to allow of the rising and falling of the lower

page_text: part. The collar may be actuated in its rising and falling by the same means as
the slide and in conjunction with it or if preferred it may be actuated by separate
parts suitably timed. In the latter case the extent of the rise and fall of the slido
might be reduced.
The machine is provided with a disengaging clutch to be operated upon by the
hand for stopping the press instantaneously and if preferred by automatic means in
case of the feeding slide failing to place a blank.
The fly wheel is connected by frictional means in case of the die being adjusted
too close or from other cause its momentum would operate to give an excess of
pressure a slip may take place saving any undue strain on the working parts and
press head.
Figures 1. 2. 3. 4 and 5 illustrate that arrangement of my invention referred to
in which appropriate motions are imparted to the lower die or its seat or bed so as
to cause it to dip as soon as the coin blank next to be coinod is placed upon it so
that the feeding slide can retire over the blank so placed without displacing it.
Figures 6. 7. 8 and 9 illustrate the alternative arrangement referred to in which
the lower die remains stationary and the feeding slide and collar are actuated to
rise so that the collar surrounds the blank and the slide being raised can retire over
the blank without disturbing it froin its position on the lower die.
Figure 1 is a front elevation partly in section-Figure 2 a side elevation partly
in section and Figure 3 a plan together showing portions which will enablo me
to explain my improvements while Figures 4 and 5 show different positions of the
parts in explanation of the actions.
A is the upper die which is fixed A' the lower die rises and falls by lover or
toggle joint action operating on the part B which in rising raises the cylinder C
which is guided in the fixed cross piece D and in which at the top the lower die is
held. The cylinder O is supported on springs a. a. acting in recesses in D in such
manner that it is always forced upwards so that the roller b on pin b¹ which is
placed in the opening C³, in the cylinder C. is kept in contact against the end of
the lever E. This lever having its fulcrum at E' is actuated by the rising and
falling of the part B and is also through lever E³ checked in its motion at the
proper time and slightly actuated by the cam E3 which is fixed to the shaft F.
This shaft may represent the main crank shaft of the press-E' is a fixed stop
against which the lever E is shown forced by the spring E³ as the cylinder C and
die A' are in their lowest positions.
The shaft F turns in the direction of the arrow and in its revolution at the proper
time brings the cam E³ into contact with and causes it to actuate the lever E
through the roller E. Motion is communicated to the collar c, from shaft F
through cam G roller G¹ lever G³, on fixed axis at G7 the double lever G³ G³-
trunnion ends d. d. fastened to the T headed guide bolts G to which the plate H
which carries the collar c, is fixed by the catches d' d' d' d¹.
The guide bolts C' in the cross piece D are provided with springs d' d' which
rest on the cross-piece and act upwards against the larger diameter of the guide
bolts G so as to keep the trunnion ends d. d. on the bolts G well up against the
upper fork of the double levers G³ and so ensure accuracy in the rising and falling
of the collar c.
The collar c is indicated in Figures 1 and 2 in its lowest position the roller G'
being upon the highest part of cam G-When the collar c is in its highest position
the lever G will be forced against the stop Gs by spring G. In Figure 2 the
feeding slide e. is also shown in its position full back receiving a fresh blank from
the hopper g while the last blank is left on the die A' to receive the impression.
This is effected by the forcible rising of the part B which in its course comes into

page_text: contact with the cylinder C which it carries with it until the blank is pressed
between the dies, while the collar c, having also risen to its highest point by the
action of the spring Go keeping the roller G' in contact with that portion of cam G
marked I it surrounds the piece while it is being coined. This position is shown in
Figure 4, the slide being still back but about to come forward with a new.blank.
During the pressure of coining the roller G' of lever G³ will not have been against
the cam as when it arrives at the end of part I of the cam the lever G³ comes
against the stop G³ when on account of the low part of the cam marked J which
does not touch the roller, passing the roller during that time it would remain against
the stop C
On the descent of the part B after the pressure, the part of cam G marked K
acts on the roller G₁ and causes collar c, to descend to its lowest position as
in Figures 2 and 5 the remaining part inarked L of the cam being concentric
retaining it in position. In the course of the descent of part B the cylinder C with
die A¹ also descends by action of spring E, on lever E' which keeps the cylinder C
in contact with the pressure part B until the top of the die A¹ has come down level
with the top of the collar c, and plate H at which moment the action of the lever E'
is arrested by the cam E³ the roller Ecoming against the cam at the part marked M
where it is concentric for a short distance and so retains the lever E' in position and
consequently the die A¹, while the coin is knocked off with the front part of the
slide é marked e¹, and the fresh blank is placed on the die A¹ see Figure 5. As
soon as this has been accomplished the part marked N of cam E³ allows lever E³ to
approach stop E by the action of spring E' until it rests against it by which action
the die A¹ has been lowered and the fresh blank along with it so that the slide e or
its front part e' can retire over the blank without disturbing it and pass back to
the hopper g for the next blank or lowest of the pile of blanks h
In Figure 3 the slide e is shown in plan and is placed in the position of half-
throw. The moveable part i is indicated in the position of covering the hole in
the slide e. The part i works on an axis at i fixed in the stem of the slide e, and
is kept against the pin by the spring is also fixed to the stem of the slide. As
the slide retires further under the hopper g the covering part i. comes against the
hopper and is displaced, taking up the position indicated by the dotted lines, but as
the slide advances again with the fresh blank the covering part i resumes its
position over the hole in the slide now occupied by the fresh blank which in its
passage to the die is thus covered.
In Figure 5 the slide is shown fully forward the blank being in its place on the
die A' and the cover i. above it, the front of the slide in this figure has just
displaced the finished coin h¹ this method of covering the blank while in the
feeding slide on its way to the die is well known and is used in other coining
presses.
My alternative arrangement in which instead of the lower die dipping after the
blank is placed upon it to allow of the return of the slide the collar and slide are
caused to rise for that purpose will be easily understood by reference to Figures 6.
7 and 8. In these Figures the plate H in which the collar c is held also serves as
a base for the feeding slide e. which rises and falls with it along also with the
hopper. In Figure 6 the die A¹ is fully down as well as the plate H and collar
and the slide, and slide e is fully forward the blank which it contains being placed
on die A¹ and the front of the slide has displaced the finished coin. Figure 7
indicates the next position in which the plate H the collar c. and the slide 6 are
raised so as to permit the slide e to pass back over the blank and the actuating cam
should be formed to cause a short rest during this operation before carrying the
collar c. & to their full height or into the position indicated in Figure 8 where the
blank is shown under pressure the collar c surrounding it and the slide e full back
receiving the next blank from the hopper g.
Figure 9 illustrates how the hopper may be made in two parts-the outer part
is fixed to the fixed plate H' and the inner and lower part which rises and falls
with the plate H slides in the outer or fixed part.

page_text: In the various figures Z-represents part of the head of the press to which the
bearings forming the fulcra for the levers E and G³ Figure 2 are shown fixed.
In Figures 1. 2. 3. 4 and 5 H' represents a fixed plate which forms the base for
slide it also indicates a fixed plate in Figures 6. 7. 8 and 9 in which the rising
and falling plate H forms the base for the slide c.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I clain is-
First. The improvement in coining presses in which the upper die is fixed
consisting in causing the lower die to descend after a fresh blank is placed upon
it so that the part of the feeding slide which is in advance of the blank may be
able to retire without displacing the blank from the die substantially as described.
Second. The improvement in coining presses in which the upper dio is fixed
consisting in causing the feeding slide to rise after it has placed a blank upon the
die so that the part of the feeding which is in advance of the blank may be able to
retire without displacing the blank from the die substantially as described.
Third. The arrangement of parts in coining presses as described and shown by
the annexed drawings.
Dated this 24th day of December 1884
CARPMAEL & Co.,
Agents for the Applicant,