Improvements in and connected with Cloth-cutting-machines.
Year: 1895

page_text: Date of Application, 15th July, 1895-Accepted, 31st Aug.,
1895
COMPLETE SPECIFICATION.
Improvements in and connected with Cloth-cutting-machines.
1, JACOB PHILIPPSOHN, Kaiserstrasse 41 of Berlin, in the Kingdom of Prussia,
German Empire, Manufacturer, do hereby declare the nature of this 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 refers to cloth-cutting-machines, in which a number of superposed
layers of stuff is cut by means of a quickly rotating circular knife; my improvements
in machines of this type relate to the combination of said circular knife with a
straight knife arranged in vertical position in close proximity to, or in direct
contact with, the rim of the said circular knife, in such a manner, that there results
a coincidence of the cutting-lines of the two knives in question. The purpose of
my improvements is to do away with the necessity of raising the layers of stuff
against the vertical front-portion of the circular knife at the end of each cut, and
to effect in lieu thereof the cutting of the remaining uncut portions (which in
consequence of the circularity of the main-knife increase in length from the top-
layer to the bottom-layer) by means of said second knife. The latter is thus caused
to act only at the end of each cut, whilst the cut-proper is effected by the rotary
knife, as usually.
In order to make my invention more clear, I refer to the accompanying drawing,
in which similar letters denote similar parts throughout the different views, and in
which:
Figure 1 is a front-view of my improved cloth-cutting apparatus;
Figure 2 is a vertical section through the same taken on line 4-5 of Fig. 1, and
scen from the righthand side and
Figure 3 is an outer view of a portion of the handle, as seen from the lefthand
side with regard to Fig. 1.
The tube a, which connects the upper casing a with the lower casing a
embraces a ring furnished with an inner flange b'; said flange takes into a
corresponding groove of a sleeve a carrying at its upper end the bevel-wheel d,
and at its lower end the bevel-wheel e. The sleeve c may be displaced upon the
shaft, with which it is connected by feather and groove. For that purpose, the
ring bis furnished with a pin 2, which takes through a cut-out a³ of Z-like
configuration provided in the tube a and the handle g. Owing to the special
configuration of said cut-out, the pin 2 (and with it the sleeve c with its two bevel-
wheels) may be adjusted and fixed in two positions.
If the ring 6 is in the position shown in the drawing, the bevel-wheel e gears
with a similar wheel i secured to the shaft k; the latter carries moreover a
cog-wheel, which is in gear with a cog-wheel m fixed to the shaft n. This
shaft projects through the front-wall of the casing a², and operates the circular
knife o.
If, however, the sleeve c is in its upper position, the bevel-wheel d gears with a
similar wheel p fixed to the shaft g; the latter carries at its front end the crank-
disk r, which is connected with the levers by the connecting-rod t.
Said lever is
at one end hinged to the link u, attached to the cap o' for the circular knife, and is
at the other end connected with the push- or blow-knife v, which latter is arranged
within a guide whinged to a projecting arm of the casing a¹. The pin or bilt
connecting the lever's with the push- or blow-knife passes through a slot of the
guide w

page_text: It will thus be seen, that there is a coupling established either between the
bevel-wheels è'and i, or between the bevel-wheels d and p, and that there is
operated in the first case the circular or main-knife o, and' in the second case the
straight or auxiliary knife v.
As the shaft f does not cease rotating during the shifting of the sleeve c, there is
a possibility, that the teeth of one or the other pair of wheels may get broken on
coming in contact with each other. In order to obviate such an occurrence, I have
devised the following arrangement.
The naves of the bevel-wheels in question are furnished with frictional
disks pld and i respectively, one or the other pair of which comes on the
_displacement of the sleeve c in contact prior to the contact between the respective
bevel-wheels, and the bevel-wheels to be driven are thus caused to rotate before
said latter contact occurs. The frictional disks to be driven are, as a matter of
course, of greater diameter than the driving-disks, and the rotation of the former
commences thus with a comparatively. slow velocity, but becomes quickly faster and
faster on the growing approach of the respective two bevel-wheels. In a short time
the rotary velocity of these two wheels exactly the same, and they may then be
brought into gear with each other without any fear of break.
The frictional disks need not indispensably be fixed to, or made integrally with,
the naves of the bevel-wheels, but may be loosely arranged upon said naves, and
combined with a loose or fast india-rubber disk, such as i, supported by an auxiliary
frictional disk 3, the latter is firmly connected with the nave of the respective
bevel-wheel. And, further, the frictional surface of the disks pl etc., need not be
perfectly even, but may have an annular groove, such as p², annihilating the friction
as soon as the respective bevel-wheels are in proper gear.
Concerning the co-operation of the two knives with regard to their common line
of cutting, it will be clear, that the cutting edges proper of both the knives must be
in one vertical plane; this necessitates a very close contact of the knives, and there
is thus given ground for a strong friction, which not only would greatly impede the
rotary movement of the circular knife, but would moreover be highly injurious for
the edge of the same, in order to avoid such drawbacks, the guide w has been hinged
to the arm a, and I then prefer to make use of a spring, which presses the push- or
blow-knife during the time of its use against the circular knife, but which keeps
said former knife off said circular knife during the time of use of the latter. The
free end of the spring need simply be laid from one side of the blow- or push-knife
to the other side, and reversely, just as required.
Concerning the manner in which the apparatus is driven, I think it sufficient to
say, that the casing a' is secured to the well-known two hinged horizontal arms,
which generally are employed in machines of the type in question. One end of
said hinged arms carries the cutting apparatus; the other end is movably attached
to a hollow standard, through which extends from below a shaft driven by any
suitable motor. The projecting top-end of said shaft, as well as the upper end of
the shaft f, are each provided with a single cord-pulley or belt-pulley, and a.,
double-pulley is loosely arranged upon a fixed pin secured to the hinge proper of,
the two arms. Said double pulley is connected with the two single pulleys by two.
belts or cords, and the rotation of the vertical shaft afore mentioned is thus
transmitted to the shaft f.
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. In a cloth-cutting apparatus, the combination with a rotatable knife having a
circular cutting-edge, of a push- or blow-knife having a straight cutting-edge, and
arranged so as to be able to act in one cutting-line with said circular knife, for the
purpose as described.
2. In a cloth-cutting-apparatus, the combination with a rotatable knife having a
circular cutting-edge, of a straight vertical push- or blow-knife having a straight

page_text: cutting-edge, and arranged so as to be able to act in one cutting-line with said
circular knife, for the purpose as described.
3. In a cloth cutting apparatus, the combination with a rotatable knife having a
circular cutting-edge, of a push- or blow-knife having a straight cutting edge, and
arranged so as to be able to act in one cutting-line with said circular knife; means
for connecting said push- & blow-knife with, and disconnecting it from, the driving
mechanisms for the same, as described.
4. In a cloth cutting apparatus, the combination with a rotatable knife having a
circular cutting-edge, of a push- or blow-knife having a straight cutting-edge, and
arranged so as to be able to act in one cutting-line with said circular knife means
for connecting, said push- or blow-knife as well as the said circular knife with, and
disconnecting them from, the driving-mechanisms for both the same, for the purpose
as described.
5. In a cloth cutting apparatus, the combination with a rotatable knife having a
circular cutting-edge, of a push- or blow-knife having a straight cutting-edge, and
arranged so as to be able to act in one cutting-line with said circular knife, means
for connecting said blow- or push-kuife with, and simultaneously therewith dis-
connecting the said circular knife from, the common driving-shaft for the same, for
the purpose as described.
6. In a cloth cutting apparatus, the combination with a rotatable knife having a
circular cutting-edge, of a push- or blow-knife having a straight cutting-edge, and
arranged so as to be able to act in one cutting-line with said circular knife; said
push- or blow-knife as well as the said circular knife being connected each to a
horizontal shaft carrying each a bevel-wheel; a vertical sleeve embracing, and
coupled by feather and groove with, the main shaft of the apparatus being
arranged between said two horizontal shafts, and carrying at each end a bevel-
wheel adapted to gear with the bevel-wheels of the said shafts; means for
displacing said sleeve, and for fixing it in either of its end positions, for the purpose
as described.
7. In a cloth cutting apparatus, the combination with a rotatable knife having a
circular cutting-edge, of a push- or blow-knife having a straight cutting-edge, and
arranged so as to be able to act in one cutting-line with said circular-knife; said
push- or blow-knife being connected to a horizontal shaft carrying a bevel-wheel ;
a sleeve arranged rectangularly to said shaft, and embracing, and coupled by
feather and groove with, the main-shaft of the apparatus carrying also a bevel-
wheel adapted to gear with said first bevel-wheel; each of said bevel-wheels being
combined with a frictional disk, for the purpose as described.
8. In a cloth cutting apparatus, the combination with a rotatable knife having a
circular cutting-edge, of a push- or blow-knife having a straight cutting-edge, and
arranged so as to be able to act in one cutting-line with said circular knife, said
push- or blow-knife as well as the said circular knife being connected each to a
horizontal shaft carrying each a bevel-wheel; a vertical sleeve embracing, and
coupled by feather and groove with, the main-shaft of the apparatus being arranged
between said two horizontal shafts, and carrying at each end a bevel-wheel adapted
to gear with the bevel-wheels of the said shafts; each of said bevel-wheels being
combined with a frictional disk, for the purpose as described.
נית
T
1005
JACOB PHILIPPSOHN,
By Geo. Thos. Hyde,
1 Broad Street Buildings, London, E.C., Agent for the Applicant.