An Improved Machine for Cutting Discs and the like from India- rubber and other Elastic Substances.
Year: 1891

page_text: Date of Application, 27th May, 1891
Complete Specification Left, 26th Aug., 1891-Accepted. 27th May, 1892
PROVISIONAL SPECIFICATION.
An Improved Machine for Cutting Discs and the like from India-
rubber and other Elastic Substances.
I, LUDWIG LUCKHARDT of Cassel in the Empire of Germany Manufacturer,
do hereby declare the nature of this invention to be as follows:-
This invention relates to an improved machine for cutting discs and the like
from india rubber and other elastic material.
The said machine is constructed substantially as follows:-
A framework of cast iron or suitable material and of sufficient length to carry
the tubes bars or pieces of material to be dealt with, is mounted on uprights or
standards bolted firinly thereto at each end.
At one end of the frame or bed plate is a travelling carriage which supports the
end of a rod sliding into a cylinder containing the material to be cut.
The sliding carriage is held or released by a cam lever worked by hand, and
upon its inner face is fixed a hook. Attached to the hook is a strap, cord, or chain
passing over a pulley about the centre of the bed plate and having suspended to its
extremity a weight.
When the carriage is released, by pushing or pulling the cam lever, the weight
falls, and through the cord or equivalent, the travelling carriage is drawn along the
bed plate and forces the piston or rod into the cylinder. The cylinder being open
at both ends and the rubber or material to be operated upon being placed therein
in front of the piston or rod, it is forced forward by the latter, and brought up
against an adjusting disc or regulator close to the cutter. This adjusting disc or
regulator is fixed on a screw spindle mounted on a bracket, which is pivotted on the
hollow chamber or receptacle containing the cutter.
The screw spindle of the adjusting disc or regulator is kept pressed tightly
against the work when in action by a spiral spring and nut on its outer extremity.
When, however, the position of the work is to be changed, the adjusting disc or
regulator contrivance is turned upon its pivot, and falls back out of the way, to
permit of the feeding forward of the work.
The machine is driven by suitable motor, the shaft of driving pulley being
supported in bearings or brackets on one end of the framework, and carrying a
pinion gearing with a toothed wheel of larger diameter, with two pins or pegs fitted
in its rim, one on each side. These pins or pegs come in contact with the longer
arms of two crank levers, through which alternate up and down motion is imparted
to a sway bar centred above and actuating a gripping mechanism for controlling
the feed up to the adjusting disc or regulator aforesaid.
The axes of the driving pulley and of the large toothed wheel above mentioned,
pass through the upright or standard of one end of the framework. The driving
pulley shaft has a pair of bevel wheels at its end, giving rotary motion motion to a
hollow spindle supporting the chamber in which the cutter revolves, this hollow
spindle passing through a stuffing box in the bottom of that chamber and rotating
another pair of bevel wheels by which the shaft of cutter is revolved.
The axis of the large toothed wheel, to which movement is given by intermediate
pinion keyed on driving pulley shaft carries at its opposite end a cam of spiral or
similar shape or equivalent eccentric mechanism to raise and lower the cutter chamber
or holder simultaneously with the alternate tightening and releasing of the gripping
mechanism surrounding the tube bar or piece of rubber or material being operated
upon. Thus, whenever the material is pressed or fed forward above the revolving
cutter, the latter comes in contact with it and a disc or slice of required thickness
is cut off. The cutter is circular in form and the blade thereof, being bolted

page_text: between two plates, may be of sufficient width to cut through a solid bar or piece
or through a tube as desired.
Dated AL J of
BONNE & Go
Registered Patent Agents, 57 & 58, Chancery Lane, London,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Machine for Cutting Discs and the like from India-
rubber and other Elastic Substances.
1, LUDWIG LUCKHARDT of Cassel in the German Empire, Manufacturer do
hereby declare the nature of the said invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to an improved machine for cutting discs and the like
from india rubber and other elastic material.
The drawings herewith illustrate the machine according to my invention,
Fig. 1 being an elevation,
Fig. 2 a longitudinal section on line A. B Fig. 1, and
Figs. 3 and 4 details set out on a larger scale.
The letters of reference in this description refer to like letters on the drawings.
When slide A. (Fig. 3) is moved towards the right, then piston B is drawn
outwards from tube C and the material to be worked may be put into the tube, and
weight E pushes piston B into tube C, which is mounted in bearings in such a
manner that it can be caused to rapidly rotate, either by means of a strap or other
driving gear, and its movement transmitted over pulley M, tooth wheels N and F,
cam P and friction roller Q to pulling rod R, whereby slide S is lifted and lowered
alternately.
The three lever jaws L, L' and I, fixed on the outside of tube C, so that their
ends reach beyond the month of tube (or notches may be cut in the tube for them),
serve to intermittently hold the material which is under constant pressure from
piston B under influence of weight E as already described.
In order to thus intermittently engage and disengage jaws L, L' & L² a wedge
ring K is employed which can be moved towards the left, for engaging, and
towards the right for disengaging the said levers, by means of levers J and J' fixed
on the same shaft as a balancing lever H, at each end of which is a pulling rod b
and, ending in a strap, the rod or strap being actuated from angle levers U
and G, which are connected with the strap, guided by rollers in a well known
manner, in such a way that when pulling the one arm of one of the angle levers U
and G in a certain direction the balance lever H is weighed down at one end,
levers J and J¹ consequently shifting wedge ring K. Levers U and G are
automatically actuated by striking against pins a and a fixed in toothed
wheels F.
On slide S is mounted a cutter O which can be rotated from shaft N by means
of berel-wheels a shaft y and bevel wheels z. Shafty is constructed in such a
manner that it can be elongated and shortened to allow slide S to rise and drop
without interfering with the rotation of the shaft which may be by means of a
square holed sleeve y₁ as shown in the drawings.
The slide A with bolt B presses the material in tube C forward up to the stop
plate W. At this point it remains until a disc has been cut off and dropped. At
that moment jaws L, L', L release the material which is again pushed forward to
disc W and when in this manner the material in the tube has been all cut, bolt B is
moved towards the right and a fresh piece of material is pushed into tube C.
Stop plate W is fixed to a pin W which passes through the sleeve like
bracket W which latter is fixed to some convenient part of the machine. À

page_text: spring W pulls pin W₁ (and thus stop plate W) towards the left so that its
extremity is kept close against stop S'. This stop S¹ is mounted on the slide S in
such a manner that it may be folded downward if desired as indicated by the
dotted lines Fig. 2. As soon as shaft y rises, stop S¹ rises with it, as well as
cutter O, and as soon as the stop S¹ rises so far as to allow pin W' to move towards
the left under the influence of spring Ws and inclined plane S the cut off portion
of the tube is allowed to drop. Stop S¹ may be held on S by means of pins or
axles S & S and spring S'. Axle S³ is screw cut, and turns in sleeve S'. A mill
headed screw S6 serves to move stop S¹ to the right or left, thereby bringing stop
plate W either to the right or left, thus adjusting the thickness of the rubber disc
to be cut off.
The action of the machine now is as follows:-
The tube C is caused to rapidly rotate by strap or other well known means. A.
strap from C to M causes that and the gear dependent upon it to rotate. Levers G
and U intermittently cause jaws L, L, and L to stop or release material issuing
from tube C, cutter O is rapidly rotating in the opposite direction to that of the
tube, and runs in water, and by the action of cam P, it is intermittently raised
and lowered, and while raised, it cuts off a disc from the material held by the
clutches.
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
(1). A machine for cutting discs from rubber or other elastic material, in which
the material is placed in a rotating tube C, and pushed forward by a piston B,
influenced by a weight, in order to be cut by a cutter O, which runs in water and
rotates in the opposite direction to the tube C, being lifted and lowered inter-
mittently, substantially in the manner as and for the purpose described.
(2). In such machines the means for intermittently holding and releasing the
material, consisting in jaws L. L', and L² being employed and actuated substan-
tially in the manner described.
Dated 26th day of August 1891.
BONNE & Co.,
57 & 58, Chancery Lane, W.C., Authorized Patent Agents.