Improvements in or relating to Machines for Shaping Articles of Wood and the like.
Year: 1897

page_text: Date of Application, 29th Jan., 1897-Accepted, 6th Mar., 1897
COMPLETE SPECIFICATION.
Improvements in or relating to Machines for Shaping Articles of
Wood and the like.
I, ELIS GUSTAV ADOLF SCHENSON, Engineer, of Arbra, in the Kingdom of
Sweden, 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 machine for shaping articles of wood and the like, is characterised by a
guiding device for the cutter frames, so that these are carried perfectly parallel to
each other and all straining is avoided by means of an adjustable device for feeding
and guiding the work piece etc., as is hereinafter described.
Fig. 1 is a vertical section of the machine and
Fig. 2 is a top view of the same.
Figs. 3, 4, 5 and 6 are sections of the same on the lines A-B, C—D, E—F,
and G-H respectively, in Fig. 1.
Figs. 7 and 8 are a side view and an edge view respectively, of a friction wheel
or roller.
The different parts of the machine are placed on a common bed frame 1 and
supported by the journal supports 2 and 4 and the frame 3. In the journal
supports 2 and 4 the horizontal axis 5 and 6 are journalled on either side of the
vertical centre plane of the machine. These axles are turned with a uniform speed
by the transverse axle 7 by means of screw and worm gearing. The axle 7 passes
loosely through the tubular axle or sleeve 8, which has its bearings in the journal 9
and 10. On the axle 8 are fixed two chain wheels 11 and 12, and at some distance
in front of them two other chain-wheels 14 are fixed on another axle 13, parallel
to the axle and journalled in a movable part. Around these two pairs of chain
wheels run the two parallel chains 15, which are furnished at one or more places
with transverse bolts 16. The axle 13 is driven by means of a chain, belt, or the
like, on the wheel 18 from the axle 7, which by means of cog gearing or å belt is
driven by the main shaft of the machine. If it is desirable to change the gearing
of the chains, which is possible since the wheels 11 and 12 are not fixed on the
axle 7, the wheel 18 is substituted by a larger or smaller one.
Under the upper
parts of the chains 15 there is placed a table 17 which can be raised and lowered
and on which the work is placed for being caught and fed into the machine by the
chain, one of the aforesaid transverse bolts 16 engaging with the outer end of the
work.
The upper cutter 19 is journalled in the frame 20, and the under cutter 21 in the
frame 22. The frames 20 and 22 are movable vertically on the guide 23, and
their position and thus that of the cutters is determined by the pattern discs 24, 24*
and 25, 25* fixed to the axles. 5 and 6 and against which the frames press with
their friction discs 26 and 27. The frames 20 and 22 are drawn towards each
other by the spiral springs 28. If two frames are to be actuated by the same
pattern disc, the pattern may rot take up more than half the diameter of the
disc. Since, however it is more advantageous to have the pattern disposed around
the whole circumference, two pattern discs (24, 24 and 25, 25*) are placed beside
each other in this machine, the one opposite the roller 26 of one of the frames,
and the other opposite the roller 27 of the other frame (Fig. 4). These two
discs have the desired pattern disposed around the whole circumference. The said
pattern discs are for the sake of simplicity in the drawing, represented by circles
only.
•

page_text: Fig. 6 shows the frames 28 for the side cutters 28* which frames are movable on
the horizontal guides 29. The frames 28 are guided by the pattern disc 30 also
placed on the axles 5 and 6 and against which the frames press by means of the
friction wheels 31. The discs 30 may also, be duplicated, as is mentioned above.
In order to avoid springs, weights and the like, for removing the frames from each
other, there are complemental dises 32 disposed behind the disc 30, which discs 32
act against the wheels 33 fixed to the frame. The discs 30 and 32 are so disposed
that the sum of their radii passing through the points of tangence (with 31 and 32
respectively) is constant, and the horizontal movement of the frame 28 will
consequently be entirely dependent upon the movement of the axles 5 and 6 and
the pattern discs.
The work is divided by a clamp device shown in Fig. 5. In a vertical opening
in the frame 3 there are placed side by side two plates 36 and 37 capable of
moving up and down and supplied with friction wheels 34 and 35. The wheels 34
and 35 are in contact with the pattern discs 38 and 39, which are also fixed on the
axles 5 and 6. The plates 36 and 37 are supplied with guides 41 and 42 which
are in contact with the work and between which the work passes.
The pattern
discs 38 and 39 are so shaped and adjusted that the guides 41 and 42 accurately
follow the contour of the work no matter how much it may vary, thus holding
the work accurately in place. In order to render springs, weights and the like
unnecessary, the guide 42 fixed to the plate 36, is below the work, but the
wheels 34 are placed above the pattern discs 38, so that the pressure of the
work against the guide 42 and the pressure of the discs 38 against the wheel 34 act
in opposite directions. In the same way the guide 42 and the wheels 35 are
arranged.
Such a device for securely supporting the work is also arranged behind the side
cutters 28*, these guides being indicated by 50 and 51 (Fig. 1). Also in front of
the horizontal cutters 19 and 21 there is a guiding device consisting of an under
plate 52 and an upper plate 53 which is capable of being raised and lowered and is
held down by springs 54 (Fig. 3). In order to accomplish the adjustment of the
respective cutters (for instance when inserting new cutters), the pivots of the
friction wheels by means of which the cutter frames are held against the pattern
discs are themselves supplied with eccentric pivots by means of which the first
mentioned pivots are fastened to the frame (Figs. 7 and 8). The said eccentric
pivots 44 are furnished partly with a square head 45, in order that they may
be turned by a wrench, and partly with a threaded nut to hold them in place after
adjustment.
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. A shaping machine having a cutter frame (20 or 22) movable on a vertical
guide and pressing by means of friction wheels against two separate pattern
discs (24, 25), which are placed on either side of the centre plane intersecting the
cutter at right angles, in order that no straining may arise between the frame and
its guide substantially as described.
2. A shaping machine having the respective frames (20, 22) of the cutters, which
work on opposite sides of the work disposed as stated in Claim 1, and with pattern
discs (24, 25) in common for both the frames said discs being placed between the
frames and in contact with the friction wheels of both the frames substantially as
described.
3. A modification of the arrangement stated in Claim 2 consisting in fixing ou
each side of the centre plane intersecting the cutters at right angles and on the
same axle two pattern discs (24, 24* respectively, 25, 25*) the one part (24, 25)
constituting pattern discs for one of the frames (20) and the other pair (24*, 25*)
for, the other frame (22) in order that the pattern may be disposed around the
whole circumference of the disc substantially as described.

page_text: 4. In a shaping machine as described the arrangement of side cutter
frames (28, 28), which in the usual manner are guided by a horizontal guide (29)
and which by means of friction wheels press against the respective pattern
disc (30, 30), whose axle extending lengthwise of the machine, lie in the centre
plane intersecting the cutters at right angles substantially as described.
5. In the device described in Claim 4, the arrangement of double pattern
discs (30, 32) each pair fixed on the same axle (5 or 6) and corresponding to one
of the frames, and friction wheels (31, 33) pressing against these discs from different
directions and fixed to the frames in order that the cutter may alternately be
carried against the work by the one pattern disc and from the work by the other
substantially as described.
6. A shaping machine having upper and under cutters arranged as stated in
Claims 1-3, with side cutters disposed as stated in Claims 4 and 5 and with the
pattern discs of the respective side cutters fixed on the axle (5, 6) on which the
pattern discs of the other cutters are fixed substantially as described.
7. In a shaping machine as claimed in Claim 6 a supporting device for the work,
consisting of plates (36, 37) disposed beside each other and movable at right angles
to the work which plates by means of friction wheels (34, 35) press against pattern
discs arranged in the same manner as those mentioned in Claims 1, 2, and 3, said
plates by means of guides (41, 42) pressing against opposite sides of the work
substantially as described.
8. In the device described in Claim 7 the arrangement of the plate having its
guide (41 or 42) disposed on the opposite side of the work in relation to that side
of the pattern disc against which the friction wheel presses, so that if the guide is
under the work piece the friction wheels are above the pattern discs in order that
no springs or the like may be needed for holding the plate against the pattern
dises substantially as described.
9. In a machine as described in Claim 1 the arrangement of the pivot of the
friction wheel, by means of which the cutter fratne is held against the pattern disc
provided with an eccentric pivot (44) by means of which it is fixed to the frame
and which pivot (44) has partly a square or several sided head, in order that it
may be turned by a wrench and partly a screwed lock nut to be tightened after
the adjustment of the frame by turning the pivot substantially as described.
10. In a machine as described in Claim 1 the arrangement whereby the pattern
discs are driven by the same axle that drives the feeding mechanism of the work
their respective axles (5 and 6) being geared to the axle (7) in order that the
different forms may occur at the same distance from the ends of the work if two
equally long finished pieces are compared with each other substantially as
described.
11. In a machine constructed according to Claim 1 and provided with the
arrangement stated in Claim 10 a feeding device consisting of a table (17) along
which travel two parallel chains (15, 15) connected by an intervening piece or
pieces (16) which push the work laid between the chains on the table and which
chains obtain their motion from the axle (7) being in connection with the pattern
dises substantially as described.
12. In the device described in Claim 10, the arrangement of a tubular axle (8)
loosely passed over the driving shaft (7) and on which one pair of the chain wheels
is fixed, while the axle (7) by means of a chain, a belt, or the like is geared with
the axle of the other chain wheels, in order that the speed of the chains may be
altered without altering the speed of the shaft (7) substantially as described.
D
ليمه
1
1002
•
BOULT & WADE,
Agents for the Applicant.