IMPROVEMENTS IN THE CONSTRUCTION OF MACHINERY FOR FORGING
Year: 1872

page_text: LETTERS PATENT to Thomas Ryder and George Ryder, of the Firm of
Thomas Ryder, Son, and Company, of the Turner Bridge Iron-
works, Tonge, near Bolton, in the County of Lancaster, Roller and
Tool Makers, for the Invention of "IMPROVEMENTS IN THE CONSTRUCTION
OF MACHINERY FOR FORGING."
Sealed the 25th April 1873, and dated the 15th November 1872.
PROVISIONAL SPECIFICATION left by the said Thomas Ryder and
George Ryder at the Office of the Commissioners of Patents, with
their Petition, on the 15th November 1872.
We, THOMAS RYDER and GEORGE RYDER, of the Firm of Thomas
Ryder, Son, and Company, of the Tuner Bridge Ironworks, Tonge, near
Bolton, in the County of Lancaster, Roller and Tool Makers, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN THE
CONSTRUCTION OF MACHINERY FOR FORGING," to be as follows:-
Our Invention is applicable to the machines known as "Ryders'
forging machines," and it consists in so constructing such machines
that when undue pressure is brought upon any of the swaying or forging

page_text: blocks a hole is punched out of a plate which is placed in any convenient
position between the cam or other driving shaft and the lower portion
of the machine which sustains the blow. By this means the injury to
the eccentric cam, tappet, or crank shaft, and to other parts of the
machine is avoided, and the original cost of the machine is reduced.
In Ryders' forging machines a packing of cork or other equivalent is
applied to the bottom block, and this packing is regulated by a screw or a
wedge; now in our performing our Invention we dispense with the cork
or other packing, and we make a punch at the lower end of the bottom
block, and this punch rests upon a metal plate of any required:
thickness, but strong enough to resist the ordinary blow of the top
block; this plate bears upon a disc resting on the end of the screw, or
on the wedge.
So long as the machine is working satisfactorily the punch at the
lower end of the bottom block is supported by the plate, but as soon as
any undue pressure comes into action between the blocks the punch is
forced through the plate, and the piece of metal so punched out drops
into a cavity in the plate.
Our Invention may be considerably modified, and the plate to be
punched out in case of undue strain, or any equivalent for the said plate,
may be placed in any convenient position between the cam or other
shaft and the point of resistance below.
SPECIFICATION in pursuance of the conditions of the Letters Patent, .
filed by the said Thomas Ryder and George Ryder in the Great
Seal Patent Office on the 14th May 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, Thomas
RYDER and GEORGE RYDER, of the Firm of Thomas Ryder, Son, and
Company, of the Turner Bridge Ironworks, Tonge, near Bolton, in the
County of Lancaster, Roller and Tool Makers, send greeting.
2
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters 3
Patent, bearing date the Fifteenth day of November, in the year of our
Lord One thousand eight hundred and seventy-two, in the thirty-sixth
year of Her reign, did, for Herself, Her heirs and successors, give and

page_text: grant unto us, the said Thomas Ryder and George Ryder, Her special
licence that we, the said Thomas Ryder and George Ryder, our execu-
tors, administrators, and assigns, or such others as we, the said Thomas
Ryder and George Ryder, our executors, administrators, and assigns,
3 should at any time agree with, and no others, from time to time and
at all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United King-
dom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF MACHINERY
FOR FORGING," upon the condition (amongst others) that we, the said
Thomas Ryder and George Ryder, our executors, or administrators, by
an instrument in writing under our, or their, or one of our or their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that we, the said Thomas Ryder and George
Ryder do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement (that is to say) :-
Our Invention is applicable to the machines known as
66 Ryder's
forging machines," and it consists in so constructing such machines
that when undue pressure is brought upon any of the swaging or forging
blocks a hole is punched out of a plate which is placed in any convenient
position between the cam or other driving shaft and the lower portion
of the machine which sustains the blow. By this means the injury to
the eccentric cam, tappet, or crank shaft, and to other parts of the
machine is avoided, and the original cost of the machine is reduced.
. In Ryder's forging machines a packing of cork or other equivalent is
applied to the bottom block, and this packing is regulated by a screw or
a wedge; now in performing our Invention we dispense with the cork
or other packing, and we make a punch at the lower end of the bottom
block; and this punch rests upon a metal plate of any required thickness
but strong enough to resist the ordinary blow of the top block; this
plate bears upon a disc resting on the end of the screw, or on the
wedge.

page_text: So long as the machine is working satisfactorily the punch at the
lower end of the bottom block is supported by the plate, but as soon as
any undue pressure comes into action between the blocks the punch is
forced through the plate, and the piece of metal so punched out drops
into a cavity in the plate.
Our Invention may be considerably modified, and the plate to be
punched out in case of undue strain, or any equivalent for the said plate,
may be placed in any convenient position between the cam or other
shaft and the point of resistance below.
And in order that our Invention may be fully understood and readily 1
carried into operation, we will proceed to describe the accompanying
Sheet of Drawings, reference being had to the figures and letters
marked thereon.
•
Fig. 1 is a sectional elevation of a "Ryder's forging machine" to
which our improvements are applied; Fig. 2 is a front view of the same;
a is the eccentric shaft; b, the connecting link which communicates the
downward motion to the top block c, the upward motion thereof being
effected by a spring; d is the bottom block, and the swages c¹ and d¹ are
secured to these blocks as usual. The lower end of the bottom block dis
provided with a punch d³ which fits in a recess in the plate e, and this
plate bears on the disc f, which rests on the upper end of the ordinary
regulating screw g. The plate e and disc ƒ are shewn full size in
Figs. 3 and 4.
The strength of the plate e under the punch d³ is calculated to resist
the ordinary pressure of the forging or compressing swages, and con- :
sequently so long as the machine is working with only the ordinary
resistance the plate e supports the punch d³ and bottom block d, but as
soon as any article is placed between the swage blocks to cause undue
pressure, the punch d² is forced through the plate e, and the piece of
metal so punched out drops into the lower recess of the said plate, by
this means the injury that would under similar circumstances be
imparted to the eccentric shaft or other part of the machine is entirely
avoided. As soon as one of the plates e has been punched out in the
manner described the machine is stopped and the punched out plate is
removed, another entire plate is then put in its place and the machine
is again ready to be started. Our improvements also reduce the cost of
construction as the packing of cork or other equivalent heretofore

page_text: applied in or under the bottom blocks is dispensed with. We also
obtain more accurate work owing to the support of the bottom blocks
being rigid instead of yielding as heretofore.
Having thus stated the nature of our Invention, and described a
convenient mode of performing the same, we wish it to be understood
that the plate e or any equivalent for the same may be placed in any
other convenient position between the eccentric or other driving shaft
and the lower point of resistance, the shape of the plate can also be
considerably varied.
We declare that we claim so constructing the machines above referred
to that when the resistance becomes too great a punch is caused to
punch a hole in a plate or other equivalent, instead of causing injury to
the eccentric or other shaft or other part of the machine.
In witness whereof, we the said Thomas Ryder and George Ryder,
have hereto set our hands and seals, this Eleventh day of May,
THOMAS RYDER. (L.S.)
GEORGE RYDER. (L.S.)