AN IMPROVEMENT IN MACHINERY OR APPARATUS FOR CUTTING OUT METAL PLATES TO PATTERN
Year: 1872

page_text: LETTERS PATENT to Gustav Lüttringhaus, of Mulheim-on-Rhine, in
the Kingdom of Prussia, for the Invention of "AN IMPROVEMENT IN
MACHINERY OR APPARATUS FOR CUTTING OUT METAL PLATES TO PATTERN."
Sealed the 4th October 1872, and dated the 11th April 1872.
PROVISIONAL SPECIFICATION left by the said Gustav Lüttringhaus at
the Office of the Commissioners of Patents, with his Petition, on
the 11th April 1872.
.?
I, GUSTAV LÜTTRINGHAUS, of Mulheim-on-Rhine, in the Kingdom:
of Prussia, do hereby declare the nature of the said Invention for "An
IMPROVEMENT IN MACHINERY OR APPARATUS FOR CUTTING OUT METAL PLATES TO.
PATTERN," to be as follows:-
One of the most important processes in hardware manufacture is the.
cutting out of pieces of metal to pattern. This cutting out is now done
by means of screw presses and other machinery and apparatus and also
by hand. After cach cut the strip of metal must be moved forward,
and a mark or stop is now used to limit this movement in accordance
with the pattern, this stop being always fixed to the tool or apparatus,

page_text: and as the strip of metal after being cut must by these means be lifted
more or less and bent at the right place the regularity of the work
depends almost entirely upon the skill of the workman.
I propose to render this kind of machinery or apparatus independent
of the skill of the workman, enabling him at the same time to attend to 5
several machines at once by the use of a guage or stop bar, the con-
struction and arrangement of which will be best understood by reference
to the accompanying Sheet of Drawing, upon which Fig. 1 is a sectional
elevation of the stamp shewing rolls in connection with same; Fig. 2
is an elevation of the guage or stop bar; Fig. 3 is a plan of roll shewing 1
perforated sheet metal beneath.
A is the shaft or upright spindle of stamp; B is the head of stamp and
dies; O is the frame of machine in which is a bush through which
the spindle passes; D is a small pair of rolls for withdrawing sheet
metal E after it has been perforated; E is the sheet metal; a is the 1
plunger which passes through the guide or head plate 6 into lower die c;
b.is the guide or head plate; c is the lower die; d is a rod which is
connected by means of e to fand thus forms the guard or template for
guaging pattern to be cut; g is a stop to prevent rod from being raised
too high; h is a spiral spring which presses the rod d either on the sheet 2
of metal E, or in the already cut pattern; i is a tappet for working rod f
attached to spindle A.
Working of the machine:-The tin, brass, or other metal strip may
be fed to the rolls by hand or by means of a set of rolls placed in front
of the machine. After the first cut the guage or stop bar begins to 2
work, and the number of cuts will be regulated by the speed of the
rolls. The shaft A in lowering carries with it the tappet i which enters
the nippers on the upper part of barf; on the shaft A rising again the
tappet i also rises carrying up the stop 9 and plunger a, thereby leaving
the metal strip to be drawn forward by the rolls. When the rising of 3
the guage barf is stopped by the pin 9 the tappet i leaves the nippers,
and the bar being drawn down again by the spring the plunger a
is again pressed against the lower die c. The journey of the guage bar
may be very slight as the plunger a need be lifted only for a sufficient
length of time to permit the rolls to carry forward the strip of metal and 3
present the proper surface to the action of the plunger, and the same
operation is renewed until the entire strip of metal is cut out to pattern.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Gustav Lüttringhaus in the Great Seal Patent
Office on the 8th October 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GUSTAV
LUTTRINGHAUS, of Mulheim-on-Rhine, in the Kingdom of Prussia, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by. Her
Letters Patent, bearing date the Eleventh day of April, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, givė
and grant unto me, the said Gustav Lüttringhaus, Her special licenco
that I, the said Gustav Lüttringhaus, my executors, administrators, and
assigns, or such others as I, the said Gustav Lüttringhaus, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the time therein
expressed, should and lawfully might make, use, exercise, and vend
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "AN IMPROVEMENT IN MACHINERY
OR. APPARATUS FOR CUTTING OUT METAL PLATES TO PATTERN," upon the
condition (amongst others) that I, the said Gustav. Lüttringhaus, my
executors or administrators, by an instrument in writing under my, or
their, or one of 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 I, the said Gustav Lüttringhaus, do hereby.
declare the nature of my said Invention, and in what manner the same is

page_text: to be performed, to be particularly described and ascertained in and
by the following statement :-
One of the most important processes in hardware manufacture is
the cutting out of pieces of metal to pattern. This cutting out is now
done by means of screw presses and other machinery and apparatus
and also by hand. After each cut the strip of metal must be moved
forward, and a mark or stop is now used to limit this movement
in accordance with the pattern, this stop being always fixed to the
tool or apparatus, and as the strip of metal after being cut must by
these means be lifted more or less and bent at the right place, the:
regularity of the work depends almost entirely upon the skill of the
workman.
I propose to render this kind of machinery or apparatus independent
of the skill of the workman (enabling him at the same time to attend to
several machines at once) by the use of a guage or stop bar, the con- :
struction and arrangement of which will be best understood by reference
'to the accompanying Sheet of Drawing, upon which Figure 1 is a
sectional elevation of the stamp, shewing rolls in connection with same.
Figure 2 is an elevation of the guage or stop bar. Figure 3 is a plan
of roll shewing perforated sheet metal beneath.
A is the shaft or upright spindle of stamp; B is the head of stamp and
dies; C is the frame of machine in which is a bush through which the
spindle passes; D is a small pair of rolls for withdrawing sheet metal E
after it has been perforated; E is the sheet metal; a is the plunger
which passes through the guide or head plate b into lower die c; bis 2
the guide or head plate; c is the lower die; d is a rod which is con-
nected by means of e to f, and thus forms the guard or template for
guaging pattern to be cut; g is a stop to prevent rodf from being raised
too high; h is a spiral spring which presses the rod d either on the sheet
of metal E or in the already cut pattern; i is a tappet for working rod ƒ å
attached to spindle A.
Working of the machine:-The tin, brass, or other metal strip may
be fed to the rolls by hand or by means of a set of rolls placed in front
of the machine. After the first cut the guage or stop bar begins to
work, and the number of cuts will be regulated by the speed of the 3
shaft A. The shaft A in lowering carries with it the tappet i, which
enters the nippers on the upper part of bar f; on the shaft A rising

page_text: again the tappet i also rises carrying up the stop 9 and plunger a,
thereby leaving the metal strip to be drawn forward by the rollers:
When the rising of the guage bar ƒ is stopped by the pin g the tappet i
leaves the nippers, and the bar f being drawn down again by the spring h
the plunger a is again pressed against the lower die c. The journey of
the guago bar may be very slight, as the plunger a need be lifted only
for a sufficient length of time to permit the rolls to carry forward the
strip of metal and present the proper surface to the action of the plunger,
and the same operation is renewed until the entire strip of metal is cut
out to pattern. The rods D and E might be arranged to work from
below instead of, as shown, from above.
My improved machine will be found applicable with great advantage
to locksmiths', steel pen makers', jewellers', portfolio makers', and other
work.
Having now described and ascertained the nature of my said Inven-
tion, and in what manner the same is or may be performed, I would have
it distinctly understood that I do not limit myself to the arrangement of
stamp, dies, and feeding rollers herein-before described and shown on
the accompanying Drawing, but propose to use any construction of
stamping machine to which my improvement may be found applicable,
nor do I confine myself to the precise details of my improvement as
herein set forth, nor to any relative dimensions of its constitutive parts,
as these may be varied while retaining its essential features; and that
what I claim as secured to me by the herein-before in part recited
Letters Patent is, the combination of the tappet i with rods d, e, f,
stop g, and spring h, or their equivalents, when constituting a guage or
stop bar, substantially as and for the purposes herein-before set forth.
In witness whereof, I, the said Gustav Lüttringhaus, have hereunto
set my hand and seal, this Fifth day of October, in the year of our
Lord One thousand eight hundred and seventy-two.