Improvements in Machines for Cutting Out Cloth and other Materials.
Year: 1893

page_text: Date of Application, 14th Nov., 1893-Accepted, 6th Jan., 1894
COMPLETE SPECIFICATION.
Improvements in Machines for Cutting Out Cloth and other
Materials.
I, HERMANN NACK of 31/32 Mariannenstrasse, Berlin, S.W., in the Empire of
Germany, Engineer, 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 relates to a machine for cutting-out cloth and other materials for
making clothing, and it has for object to enable the cutter to cut-out any number
of layers of material simultaneously up to a certain limit whilst permitting of the
cutter being lifted off the work and brought down at another point or swung aside
out of the way of the work without in any way disturbing the layers. The
machine is portable and compact and may be arranged to operate in any convenient
position.
Reference is to be had to the accompanying drawings, forming part of this
Specification, wherein
Figure 1 shews the machine in elevation and partly in section.
Figure 2 is a face view of the cutting device and
Figure 3 a vertical section, on a larger scale, through the shaft and bearing.
The cutter is driven from a fly-wheel a, operated by hand or power through a
pulley fast therewith, a belt running thereon and on a pulley e fast on a vertical
shaft c mounted in a bearing d and in a protecting casing f, thence from a pulley g
fast on shaft c by a belt running thereon and on a pulley or spindle 7, thence by
another pulley and belt running thereon and on a pulley on spindle i, thence by
spindle and bevel gear k, l, to the spindle m of cutter o which should be speeded
to run at about 1000 revolutions per minute. The shaft m is journalled in the
casing n enclosing the bevel gear. The circular cutter o is secured in the projecting
end of the shaft m so that it can be readily dismounted and replaced by another
cutter ground to suit the work. The cutter o is shielded at the top by a guard
plate p cast with or fixed to the casing n to protect the hand of the operator, which
grasps the handle q for directing the cutter. An adjustable bracket r is fixed to
the casing n and carries the slotted foot s and shoe t which is grooved to clear the
cutter edge and is bevelled at the front so that the layers of cloth lying upon the
table u are raised up to meet the cutter in a direction radial to the cutter at
the moment of cutting, with the result that the material is not drawn into the slots
but is easily cut through, thus permitting the continuous operation of the cutter.
When the radius of the cutter has become diminished by repeated grinding, the
shoe can be set accordingly, by means of the bolts and slots v. The three
shafts c, h, i, are held at the proper distances apart by radius or swing arms w, w¹,
permitting of the swinging of the cutter in any required direction in a horizontal
plane, by means of the handle q, the joint a by which the radius arms are connected
together being in the form of a ball and socket to admit of the motion of the arm w¹
in a vertical plane. The short shaft i is tubular and receives the spindle with
which it has a sliding connection, formed by a feather on i engaging in a
longitudinal groove in so that the two turn together with freedom for vertical
motion when the cutter is raised or lowered. The short shaft i has an exterior
spiral groove whereby the oil supplied at and collecting in a cup at is
carried upwards by the rotation of the shaft thus keeping the bearing lubricated.
.
.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what
I claim is :-
1. In a machine for cutting out cloth, the hand or power operated transmission
mechanism for operating the cutter shaft, consisting essentially of several shafts
geared together, their bearings being coupled by radial swing arms whereof the
intermediate joint or joints is or are in the form of a ball and socket joint so as to
render the radius arms movable in all directions, the last shaft being in two parts
fitting the one in the other with a groove and feather connection so that they
revolve together whilst permitting of vertical motion of the one part to facilitate
raising the cutter off or bringing it down on to the work.
2. In the cutting out machine herein described, the device for oiling the bearings
of the two-part shaft of the transmission mechanism, consisting of a spiral groove
whereby the oil entering by a central channel and collecting in a cup is carried
upwards for the purpose of maintaining a circulation of oil through the sliding and
rotating bearings of the two part shaft i i, as described.
3. In the herein described cutting-out machine, the combination, with the
circular cutter, of the cloth guide s, t, slotted or grooved to receive the circular
cutter and bevelled so that when the cutter is moved over the cloth the latter is
presented radially to the cutter so as to obviate dragging the material into the slots
and clogging the action of the cutter.
4. The herein described improved machine for cutting-out cloth constructed and
operating substantially as specified.
Dated this 14th day of November 1893.
By A. M. & Wm. Clark,
H. NACK,
53, Chancery Lane, London, Chartered Patent Agents.