Improvements in Machinery or Apparatus for Cutting Veneer and the like.
Year: 1895

page_text: Date of Application, 26th Sept., 1895-Accepted, 16th Nov., 1895
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Cutting Veneer and
the like.
I, JOHANN ANTHON, of Flensburg, in the German Empire, 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:-
The object of my invention is to cut blocks of wood or other material, spirally,
by means of band, frame, or other suitable saws, into continuous sheets of any
required thickness, suitable for veneer and the like; for which purpose the saw is
required to operate upon the block from the periphery to the centre with a
continually decreasing radius, the block being caused to rotate upon its centre and
also carried bodily forward towards the saw while being operated upon; the speed
of rotation and the carrying forward being simultaneously increased as the cut
approaches the centre of the block.
And in order that my said invention may be particularly described and
ascertained, reference is hereby made to the accompanying drawings in which
similar letters of reference indicate corresponding parts.
Fig. 1 is a side elevation; Fig. 2 a plan and Fig. 3 an elevation of the left hand
end of Figs. 1 and 2, illustrating one method of carrying out my invention.
The apparatus consists of two frames, a being the upper movable frame, sliding
in dovetail guides e, formed on the stationary frame b. The frame a carries the
clamping apparatus in which the block of wood or other material B is held, by
means of a screwed centre bolt d at the upper end of the block and a chuck f
under the block. The chuck f is fast on the spindle of the pinion t¹, which is in
gear with the pinion t2, the latter being fast on the spindle of the worm-wheel t,
which is driven by the worm s.
c is the belt pulley for driving the cone k, and is a movable belt for driving
the cone at variable speeds. The position of the belt is governed by the
fork i, pivoted at u to the movable frame a, and at u¹ to the stationary frame b.
The shaft c is formed with a feather sliding in a groove in the pinion c³, whereby
the pinion is driven, and, by means of change wheels o, m, the wheel m and screw m¹
are driven.
The screw m¹ works in a nut m² fixed to the frame a, whereby the position of
the frame a, and consequently also of the block B, relatively to the saw, is
controlled. w is a steadying and supporting wheel mounted in bearings attached
to the frame a.
From the foregoing description it will be understood that the revolutions of the
block B and the operation of the saw, are equalized by the slower speed of the
shaft cat the commencement of the cut, and the increase of such speed as
the diameter of the block decreases. This is effected by the position of the fork i
and belt r. The cone k being driven at uniform speed, the cone k¹ is at first
driven at a slow speed by the belt and consequently the worms causes the
revolution of the block B to correspond in speed. But, by means of the gear o
and screw m³, the frame a is steadily carried forward. This movement carries the
pivot lever and fork i forward from the left to the right hand, whereby the
belt r is also shifted forward, and the speed of the cone and gear in connection
therewith, is correspondingly increased, in a manner well understood in relation to
lifferential gearing.

page_text: The relative diameters of the conical pulleys k and k¹ are arranged so that
the feed motion may be uniform throughout the entire cut, the revolutions and
forward travel being slowest at the commencement and greatest in speed at the
finish.
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 machinery or apparatus for cutting veneer and the like, the improved
method of mounting the block so as to rotate upon a centre parallel to the path of
the saw, while the linear advance of the block is correspondingly governed by the
countershaft m, substantially as hereinbefore described and illustrated by the
drawings.
2. In machinery or apparatus as aforesaid, the combination of means and
appliances, whereby the cutting speed is rendered constant by increasing the speed
of revolution of the block as the saw advances towards the centre of the block,
substantially as herein before described and illustrated by the drawings.
3. In machinery or apparatus as aforesaid, the combination of a frame which
can be moved in guides by means of a screw towards a band or frame saw, such
frame carrying the feed mechanism and appliances for holding and rotating the
block, the means and appliances for increasing the rotation of the block, and a
stationary frame carrying the change wheel gear and shaft m, substantially as
herein before described and illustrated by the drawings.
4. In machinery or apparatus as aforesaid, the combination of differential
driving gear, governed by the relative positions of the movable frame a and
stationary frame b, the linear motion of the former causing the lever q and fork i
to move the band r so as to increase the speed of rotation of the shaft k' as
required, substantially as hereinbefore described and illustrated by the drawings.
5. The improvements in machinery or apparatus for cutting veneer and the like
substantially as described.
Dated 25th September 1805