Year: 1895

page_text: Date of Application, 1st Oct., 1895-Accepted, 2nd Nov., 1895
A communication by HANS CHRISTIAN TOUGLAND, of 18 Osterhausgaden,
Christiania, Norway, Mechanician.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E. of The Agency for
Foreign Patent Solicitors 6 Lord Street, Liverpool and 6, Bank Street, Manchester,
both in the County of Lancaster, 118 New Street, Birmingham in the County of
Warwick, and 31 High Holborn in the County of Middlesex, Civil 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 machines for manufacturing wood-wool and especially
to that type of such machines, which cuts shavings from planers into narrow strips.
Heretofore such machines have been provided with two rollers having a rifled
surface, the rifles of the rollers forming circular cutting edges, which work together
so as to cut the shavings that are passed between the rollers into narrow strips.
These machines are very expensive and must be treated with great care, because
when one of the cutting edges has been damaged, the whole roller must be
redressed.
The present improvement consists in employing instead of two cutting rollers two
rows of cutting discs loosely fitted on two parallel shafts and the invention and the
advantages gained by the said construction will be explained in detail, reference
being had to the accompanying drawings, in which
Figure 1 is a plan, partly in section and Figure 2 a cross-section of a machine
embodying the invention, and Figure 3 is a detail showing part of a longitudinal
section.
A and B are square shafts journaled in suitable boxes on the rectangular
frame M. C are a number of circular discs having square centre holes, fitting
loosely on the shafts between the discs, rings A' are placed and the whole series
of discs are held together by means of nuts D, between which and the discs is
placed a washer E, preferably of rubber.
The discs of one of the shafts reach with their peripheries between the discs
of the other shaft and on this line the discs are held tightly together by means of
rollers F, one at each end of the machine, said rollers being carried by spring
arms G, which latter may be tightened up by means of a set screw H (see Figure 3).
It will be seen from Figure 2 that one of the shafts B is not journaled directly on
the frame but on an adjustable frame P, so that the shafts may be adjusted to or
from each other. I represents rows of thin blades, mounted on rods J and held in
position by means of screw bolts K, so that these blades, which serve to keep the
discs clean, lie between the discs. T are similar blades held by brackets S mounted
on top of the casings R. These latter blades form a kind of feed way for the
shavings, which are introduced from above into the machine, and also serve to
keep the wood strips away from the centre of the discs.
The shaft A is driven by means of a chain wheel O and the other shaft receives
movement through the friction between the discs. There may however also be
arranged a set of gearwheels on the two shafts, whereby a more positive action is
obtained.
The working of the machine will be understood from the above without special
description. It will be understood that the machine will do its work whether the

page_text: discs are all accurately of the same thickness and diameter or not, because they
adjust themselves automatically. For the same reason it will be understood, that
it will do no harm if the discs, are not quite plane or even. The cutting edges of
the discs will not be liable to get worn and when worn they may be easily redressed
by putting all discs on one shaft tightly together and turning them off in a lathe,
as if they were a solid cylinder. If it should happen that one or more of the discs
be damaged, for instance through a nail or other metallic body, being taken along
with the shavings, these discs may very easily be taken out of the machine and
other ones inserted in their place.
The invention is not limited to the construction of the machine and arrangement
of parts as shown in the drawing-which only serves as an example, .as.it will be
readily understood that the same may be modified without departing from the
spirit of the invention.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim. is:-
1. In a wood-wool manufacturing, machine, two parallel shafts having each a
series of thin circular discs mounted thereon so as to turn with said shafts and
extending with their peripheries between each other, substantially as described.
2. In a wood-wool manufacturing machine the combination with two parallel
shafts having each a series of thin circular discs mounted thereon so as to turn with
said shafts, and extending with their peripheries between each other, of means for
holding the discs tightly against each other on the meshing line and means for
rotating one or both of the shafts.
3. In a wood-wool manufacturing machine the combination with two shafts
having circular discs mounted thereon and means for keeping the same loosely on
the shafts at a distance from each other equal to the thickness of the discs, of two
series of blades (T) mounted above the discs and entering between the same so as
to form a feed way and to prevent the wood-strips from being taken along with the
discs in their rotation.
4. A machine for manufacturing wood-wool from shavings substantially as
described.
Dated this 30th day of September 1895.
WM. P. THOMPSON & Co.,
Agents.