Improvements in Machines or Apparatus for Cutting, Stamping, and otherwise Working Metals and other Substances.
Year: 1890

page_text: Date of Application, 21st Apr., 1890-Accepted, 25th Oct., 1890
COMPLETE SPECIFICATION.
Improvements in Machines or Apparatus for Cutting, Stamping, and
otherwise Working Metals and other Substances.
I, RAYMOND PICARD, of 32, Rue Fontaine au Roi, Paris in the Republic of
France Manufacturer, do hereby declare the nature of my said invention and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:
My invention relates to machines or apparatus for cutting or shearing metals and
other substances and for simultaneously stamping embossing or chasing or otherwise
working the same and comprises the improvements hereinafter set forth.
An important feature in my said invention consists in the provision of improved
means for commanding or governing the tool-holder, and for the automatic feed
movement of the material to be cut.
In the accompanying drawing I have shown how my said invention may be
conveniently and advantageously carried into practice.
Figure 1 is a vertical longitudinal central section illustrating my improved cutting
or stamping machine.
Figure 2 is a plan.
Figure 3 is a front elevation and
Figure 4 is a transverse section thereof.
Figure 5 is a side elevation showing a detail or construction hereinafter described.
Like letters indicate corresponding parts throughout the drawing..
The main shaft or spindle a of the machine is provided with a special adjustable
eccentric 6 coupled by means of a ball and socket joint to the sliding block or
tool-holder c. The said sliding block or tool-holder e is fitted to move freely between
lateral guides d, and is formed in two parts or portions firmly connected together by
means of a key c¹, the withdrawal of which is sufficient to arrest instantaneously the
movement of the tool although the driving or main shaft or spindle and the
eccentric still continue to move. e is the tool which can be removed when desired as
in the ordinary cutting or shearing machine, each time the work is changed.
stroke and
In my improved machine or apparatus the travel of the tool can be regulated at
will by adjusting the eccentric b. For this purpose the said eccentric b is provided
with cheeks in which it is movable through the medium of setting up screws b³
thus increasing or diminishing its eccentricity or the throw or
consequently the movement or travel thereof." Setting up screws are also
provided for securing the said eccentric firmly to the said checks after it has been
properly adjusted.
The band or strip to be cut is fed over the table guide g (Figure 4) which is
adjustable in every direction. The said band is gripped fed or moved and maintained
beneath the tool by means of two pincers or grippers one of which is mounted at
each side of the machine, and to which the following simultaneous movements are
imparted, that is to say :-
First. An horizontal displacement upon the carriage i for feeding forward the
band of metal or other material to be operated upon, after each stroke of the tool.
The mechanism for effecting this displacement may be varied, that shown however
in Figures 1 and 3 is the arrangement which I prefer to employ for this purpose.
It consists essentially in effecting the to and fro movement of the said carriage i by
means of one arm of an oscillating or rocking lever k pivoted at . In order to
vary the travel of the said carriage i, it will be seen that it is sufficient to alter the
length of the other or actuated arm of the said lever k; with this object a slot k² is
provided in the said actuated arm of the said lever in which slot works through the
medium of a suitable anti-friction roller an adjustable pin stud or projection ³ upon

page_text: the toothed wheel. The said toothed wheel is secured to the discs ¹, the two
diametrically opposite parts of the circumference of which are notched concentrically
to the axis of a disc m, secured to the shaft a the said disc m being provided with
two projecting sectors which are adapted to engage with the concentric notches in
the disc. The distance of this pin or stud 3 from the centre of the said toothed
wheel can be regulated as desired by means of a screw %, the distance through
which the lever k will be oscillated being consequently varied in a like proportion.
The above mentioned lever is itself operated by means of the disc m keyed or
otherwise firmly secured upon the shaft or spindle a and provided with two rollers m!
which successively engage in grooves or channels in a disc m which disc is formed in
the shape of a Maltese cross. The intermittent rotation of the disc m² is transmitted
by suitable spur or toothed gearing to the said toothed wheel (as more clearly
shown in Figure 3).
The work of the tool upon the band takes place during the time when it is
stationary which commences at the instant when one of the said rollers m' leaves the
corresponding groove of the disc m² and which terminates at the instant when the
other roller engages in the next or following groove or channel.
In order to ensure the inaction of the mechanism during the above mentioned
stoppage, the two projecting sectors are adapted to exactly fit into each of the said
concentric notches of the disc land thus lock or retain the latter during the said
stoppage.
is itself
Second. The second movement of the pincers or grippers is that of the opening of
the mouth or jaws . This opening is produced by means of a cam working
between the two arms of the said pincers or grippers, which latter are hinged or
jointed at ³ (as more clearly shown in the detail view Figure 5) the cam
operated by the levers n which are united by a cross piece or cross-bar n' so as to
work in unison. The operating or actuating power is derived from a groove or
channel o of a disc secured to the shaft a in which works an antifriction roller pl
mounted upon a slide p which latter is coupled to the cross piece or cross bar n¹ by
means of a head n² the whole slipping into a frame q (Figure 3).
It will be seen that by uncoupling the head n from the slide p either by means of
suitable disengaging gear or by means of a ratchet, key or in any other convenient
manner, the can will be rendered inoperative, the jaws of the pincers or
grippers will remain open, and consequently the feed motion of the band under the
cutting tool will be interrupted or suspended.
P
The slide P consists of two pieces and n² placed end to end in the direction of
motion engaging with each other by means of a tenon and mortice or the like and
firmly secured together by means of a cottar or key p². By operating the hand-
lever på First. This cottar or key can be displaced longitudinally and the unity of
the two pieces p and n² destroyed, the upper piece p remaining free to move vertically
under the action of the cam o. Second. The piece p* which is situated parallel to
and at the rear of the key or cottar p² is displaced. This latter piece acts upon the
head of the camp the lower portion of which in turn acts upon a heel or
projection formed on the lower piece n² of the slide p and lowers this piece (if it is
not at the bottom of its stroke) and prevents it from rising. An instantaneous
disengagement is thus ensured in any position of opening of the pincers or
grippers.
When the eccentric / leaves the two jaws free to close, a spring r bearing against
the lower jaw causes it to close against the upper one thus gripping between them the
band or strip to be cut. When the machine is intended only for cutting or shearing
the upper jaw is invariably fixed by means of two screws. The first prevents it
from descending too low, the second from rising too high. When the machine is
intended for stamping embossing or chasing the upper jaw of each of the pincers or
grippers is raised to the. necessary height for removing the band or strip from the
reliefs or recesses and to permit its forward feed movement and avoid damage or
injury to the impression through the friction or rubbing of the said band or strip.
This combination is obtained by means of the said adjustment screws above

page_text: mentioned and of a spring the first limits the travel from above downwards
imparted by the spring the second which is provided with a lock nut limits the travel
from below upwards which results from the action of the closing spring r.
Third. The pincers or grippers are mounted in such a manner as to give or yield
with the various irregularities of the band or strip to be cut, thus ensuring the
accuracy of the cutting and stamping relatively to the edges of the said band or
strip. For this purpose spring push pieces W are provided for constantly pressing
the band or strip against the fixed tool guide; the pincers or grippers are acted
upon by these push pieces through the medium of the band or strip when they take
hold of it and resume their intermediate position each time that they leave go of the
said band or strip, by sliding on their carriages under the action of the antagonistic
springs. For the same reason the jaws are provided with hinges or universal
joints so as to be capable of following all the movements of the metal to be cut.
The carriage i which is adapted to make a to and fro movement as above stated is
arranged between guides provided upon a table, capable of turning round a fixed
centre on the table so as to be capable of being placed in a position parallel to the
edges of the band or strip. The position of this table (Figures 1 and 2) which does
not make any to and fro movement is fixed after adjustment by means of the pins v
which work in corresponding arc-shaped slots or bearings.
The two carriages s¹ for the pincers or grippers are also capable of turning round
centres u fixed upon the carriage i so as to be capable of being moved nearer to each
other or moved further away in accordance with the size of the tool and the necessary
travel.
The other parts of the machine or apparatus consist in the general arrangement of
the various details appertaining to the mechanical construction thereof, which may
be modified according to the desires of the construction and which being obvious
and easily understood it is consequently unnecessary to describe in a particular or
special manner.
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
First. In a machine for cutting stamping, embossing or chasing the method of
commanding or governing the tool by means of an eccentric the eccentricity of
which is directly and instantaneously adjustable, without having to unmount any
of the parts, substantially as described and illustrated in the accompanying drawings.
Second. In a machine for cutting stamping embossing or chasing, the automatic
feed movement of the bands or strips by means of two pincers or grippers combined
with push-pieces, and provided on the one hand with the governed or commanded
movements of feed (with stoppage during the travel of the tool) opening and
closing, which produce the feed properly speaking of the band or strip, and provided
on the other hand with movements permitting them to follow all the irregularities of
the said band or strip, which movements are determined by the said irregularities
themselves.
Third. An improved machine or apparatus for cutting stamping embossing or
chasing characterized by the combination of an eccentric having an adjustable stroke
or throw actuating the tool, with a feed movement of the metal by means of pincers
or grippers placed at each side of the said tool, and provided with automatic
movements of displacement, stoppage, opening seizing or gripping, and of recoil or
hackward movement substantially as described with reference to the accompanying
drawing.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.