CERTAIN IMPROVE- MENTS IN THE CONSTRUCTION OF PRESSES APPLICABLE TO VARIOUS PURPOSES
Year: 1832

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MILES
BERRY, of 66, Chancery Lane, in the Parish of Saint Andrew, Holborn,
in the County of Middlesex, Civil Engineer and Mechanical Draftsman, send
greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster, the Twenty-sixth day of July, in the third year of His
reign, did, for Himself, His heirs and successors, give and grant unto me,
the said Miles Berry, His especial licence, full power, sole privilege and
authority, that I, the said Miles Berry, my executors, administrators, or
assigns, or such others as I, the said Miles Berry, my executors, adminis-
trators, or assigns, should at any time agree with, and no others, from time
to time and at all times during the term of years therein expressed, should
and lawfully might make, use, exercise, and vend, within England, Wales,
and the Town of Berwick-upon-Tweed, our Invention of "CERTAIN IMPROVE-
MENTS IN THE CONSTRUCTION OF PRESSES APPLICABLE TO VARIOUS PURPOSES," which
said Invention has been communicated to me by a certain Foreigner residing
abroad; in which said Letters Patent is contained a proviso obliging me,
the said Miles Berry, to cause a particular description of the nature of the
said Invention, and in what manner the same is to be performed, to be inrolled
in His said Majesty's High Court of Chancery within six calendar months next
and immediately after the date of the said in part recited Letters Patent,
otherwise the said Letters Patent shall cease, determine, and become void,

page_text: as in and by the same, reference being thereunto had, will more fully and at
large appear.
NOW KNOW YE, that in compliance with. the said proviso, I, the said
Miles Berry, do hereby declare that the nature of the said Invention, and
in what manner the same is to be performed, is particularly described and
ascertained in and by the following description thereof, reference_being had
to the Drawings hereunto annexed, and to the figures and letters marked
thereon (that is to say):
:-
These improvements in the construction of presses applicable to various
purposes consist in the adaptation of rotary toggle joints or jointed levers
placed upon a revolving shaft, which, when brought into a right line, affect
the pressure upon the article submitted to its operation. This mechanism is
applicable to various kinds of presses employed for making nails or rivets,
heading screw shafts, bolts, or pins, making buttons, coining money, striking
dies upon metals, and embossing cards or paper and other materials, the
improvements consisting in obtaining the pressure by means of rotary arms
with toggle joints or jointed levers in any kinds of presses to which the same
may be applicable.
As the minor parts or details of the press must necessarily vary according
to the description of press to which these improvements are to be adapted
and the kind of work intended to be performed, I shall only describe, in this
my Specification, a simple application of these improvements in a press which
may be used for coining money or stamping or striking dies.
The several Figures in the accompanying Drawing, and the following
description thereof, will sufficiently explain the principles and action of the
rotary toggle joints or jointed levers in producing the required pressure
upon the article to be struck in the press.
Fig. 1 is a front elevation of a press; and Figs. 2, 3, & 4, are side views
of the same, partly shewn in. section, 'that is, one of the side frames being
removed 'in order to exhibit 'the different positions of the mechanism more s
perfectly, the same letters of reference being marked on corresponding parts
in all the Figures. The framework of the 'press represented at a, a, a, may
be made of metal or wood, and constructed to suit the particular purpose for
which it may be intended to be used. 6 is a shaft mounted in suitable
bearings in the side'frames, and turned by a winch or other convenient means.
Upon this shaft is securely fixed the arm or lever c, carrying the toggle
joint and the outer lever d, at the extremity of which lever is placed the
stamp die or cutter. e is another shaft also mounted in bearings in the side
frames, and from which extend the arms or 'block pieces f, f, having the

page_text: under or counter dies at their extremities. The ends of these arms or blocks
are alternately brought into contact with the upper die as they both revolve
by means of the toothed wheel g mounted upon the shaft e taking into
another toothed wheel h upon the shaft b of half its diameter, which causes
the shaft to révolve with twice the velocity of the shaft e. A holder or.
piece of metal i, countersunk or otherwise formed for the upper die, is
placed between guides [k, k, fixed on the outer toggle lever d; and which
die holder i is allowed to slide up and down within the guides, and is forced
downwards by the action of a helical spring coiled round the outer toggle
lever d within the guides, as may be seen in the detached view of the outer
toggle lever, Fig. 5, where the guides are removed from one side, and the
helical spring 1, shewn in section the better to expose the parts; and a small
ledge upon the ends of the guides k (see Fig. 1) prevents the spring 1 from
projecting the die holder i beyond its proper place. In order that the two dies
as they revolve may meet each other fairly and correctly, the outer toggle
lever d, with the die holder i, is. pitched forward at an angle so as to bring it
into a right line with the centres of the block pieces f as they come up to
the point of meeting (as shewn in Fig. 2). This inclined position of the
lever is produced by the force of the spring m fixed upon the boss by the
inner toggle lever or arm c, the end of the spring m being connected by a
bridle piece n to the outer toggle lever, as shewn in the Drawings; and by
these means the lever is returned in the inclined position shewn in Figs.
2 & 4, after each impression. The extent of this obliquity of the toggle'
lever d is determined by a regulating screw o, on the end of the arm p, fixed:
upon the outer toggle lever; which screw comes in contact with the inner
toggle lever between each impression, as shewn in Figs. 2 & 4. On the
wheels g and h being put into motion by a winch or other means in the direction
of the arrows, the shafts and e will revolve in opposite directions, and in
consequence of the difference of the diameters of the wheels the toggle
levers d will revolve with double the speed of the block pieces f, f. By this
rotation of the two wheels and their shafts the block pieces f, f, carrying the.
lower dies are alternately brought into contact with die holder i at the end.
of the outer toggle lever.d; which are the periods of the dies coming into'
operation. On the die holder i, at the end of the toggle lever d, meeting one
of the block pieces f, the ends of the guides k, k, first. strike against a
transverse pin 9 fixed at the back of each block piece, and as..the rotary
progress of the block piece f is slower than that of the toggle levers, it
follows that the outer toggle lever d will be retarded and forced by the
resistance of the pin 7 against the guides k, k, into a perpendicular position,

page_text: as at Fig. 3; the guides k, k, sliding against the pin q, the spring m bending,
and the press now existing its maximum of power, the pinch of the dies or
cutters fixed at i takes place in the line of the centres of the toggle joint as
it passes the centre of the block and of the shafts or axles, and by these
means a central impression is given by the dies to the material operated upon.
Fig. 2, as before said, shews the positions of the parts of the press at the period
that the block first meets the upper die holder, which is thrown outwards to
meet the counter die by the action of the helical spring 1. Fig. 3 shews the
position of the press at the period that the toggle joints and blocks are passing
the centres and the dies are giving the impression, the die holder i being
forced against the end of the outer toggle lever d by the resistance of the
block piece, the helical spring 7 giving way to the pressure. Fig. 4 shews
the press after the dies had been struck, and the toggle joint and block have
passed the centres, the toggle levers c and d moving round to meet the other
block piece f as it rises, when they will act in the same way as described,
and produced another impression. The size of the toothed wheels and their
proportions one to another, the length of the toggle levers and block pieces,
the relative speed of one shaft to the other, the number of toggle joints or
levers to the number of block pieces, may all be varied by different arrange-
ments and proportions, retaining, however, the same principle of action in
the press. The materials to be impressed, stamped, struck, cut, or otherwise
operated upon, may be placed in either the upper or lower die, or between
the two, or introduced or fed into the press by hand, or by any convenient
machinery, such as a feeding table, which may be brought between the toggle
levers and block pieces after each impression by the motion of a crank or
lever; but as the manner of feeding or introducing the material into the
press must vary according to the nature of the material and description of
work to be performed, it is not necessary for me to describe any particular
mode of effecting the same, the improvements which I claim under the
above in part recited Letters Patent being the application of rotary toggle
points or jointed levers in connection with the blocks or other such necessary
resisting parts, to produce the required pressure, in the manner herein
described, and the adaptation of the said contrivance to all presses to which
the same may be applicable..
In witness whereof, I, the said Miles Berry, have hereunto set my]
hand and seal, this Twenty-sixth day of July, in the year of our
Lord One thousand eight hundred and thirty-three.
MILES (L.S.) BERRY.

page_text: AND BE IT REMEMBERED, that on the Twenty-sixth day of January,
in the third year of the reign of His present Majesty King William the
Fourth, the said Miles Berry came before our said Lord the King in His
Chancery, and acknowledged the Instrument aforesaid, and all and every
thing therein contained and specified, in form above written. And also
the Instrument aforesaid was stamped according to the tenor of the Statute
made in the fifty-fifth year of the reign of His late Majesty King George the
Third.
Inrolled the Twenty-sixth day of January, One thousand eight hundred
and thirty-three.