A Wood Carving Machine.
Year: 1889

page_text: Date of Application. 18th Apr., 1889-Accepted, 15th June, 1889
A Wood Carving Machine.
I, ERNST JÜRGEN CHRISTIAN KÖSTER, of Heide, in Holstein, Kingdom of Prussia,
Empire of Germany, Saw Mill Owner, 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 :-
My invention relates to a machine for carving wood and is especially applicable for
producing carved ornamental mouldings such as are used for making picture frames,
decorating furniture, panels and the like.
The manner in which I carry my invention into effect is shewn in the accompanying
drawings, Fig. 1 is a general view of the machine, Figs. 2-4 shew various details,
and Fig. 5 is a section of Fig. 3 on the line c-d, while Fig. 6 is a section of Fig. 4
on the line a-b.
The machine according to my invention consists in a sliding carriage in which the
wood to he carved is placed, such sliding carriage being moved along in short stages,
and while at rest suitably shaped chisels or cutters, fixed in holders which work with
an oscillating motion, make cuttings in the wood, the various chisels or cutters being
fixed at different angles and working in conjunction with each other in such a manner
that the second, third etc., sets of chisels make further cuttings, thus producing a
regular carved ornamentation.
The machine consists of the following parts, the letters mentioned referring to like
letters in the drawings.
The machine is mounted on a table A. The driving pulley I with crank lever K
sets the intermediate gearing L in a reciprocating motion.
The various levers (serving when set in motion to oscillate the chisel heads R R₁
& R2) all issue as does the feed lever G from the said intermediate gearing L which
consequently communicates the oscillating motion it receives to all the said levers.
The feed lever G is most conveniently constructed as an angle lever, turning in the
point M and supported by another short lever turning in the point N. It is provided
at its lower end with a pin, which catches in the teeth of the rack F, and with a slide
block, which moves forward and backward in the guide H.
The said rack F is joined to a sliding carriage D Fig. 4 to which sliding carriage
the wood E to he carved, is attached in a suitable manner. The said sliding carriage
slides on a metal board which is adjustable by means of screws B Figs. 3 & 4.
The sliding carriage D is guided and steadied by means of counter weights P
pressing brushes O against the wood E or the sliding carriage itself.
The cuttings forming the ornamentation are produced by means of the chisels
ttached to the chisel heads R R & R² which are fixed at different angles to each
ther and to the wood, as for instance such as shewn in Figs. 3 & 4. There may be
nore or less than three chisel heads, their number and the angles at which fixed
epending on the particular ornamental design which it is desired to produce.
Each one of the said chisel heads R R & R hangs in pointed screws or pins which
re fixed on bucks resting on the table A Figs. 2 3 & 4. They receive their oscillating
notion from the levers S S¹ & S², these levers being hinged to axle trees of the chisel
eads in a suitable manner according to the angle at which the chisel holder is placed.
When it is vertical as in Fig. 4 the connection is in the simplest manner while when
orizontal as Fig. 2 or at an angle as in Fig. 3 the connection is by means of ball
ivot or similar contrivance.
The chisel heads R & R¹ are meant to do the principal part of the work, the chisels U
eing fastened to the blocks T & T Figs. 5 & 6 and as the chisel heads R & R'
cillate, so the chisels cut into the wood.
The chisel fixed to chisel hood R2 mokar onu mauined haziennial nutting

page_text: The action of the machine is consequently as follows:-
Each revolution of the driving pulley pushes the sliding carriage D forward the
length of a tooth of the rack F. While the upper part of the intermediate gear L
moves towards the left, the chisels fixed in block T Figs. 5 & 6 cut into the wood,
whereas, while the upper part of the lever L moves towards the right the chisels fixed
to block T¹ come into action.
The board C may be lowered and raised by means of the screws B Figs. 3 & 4 and
in this way the depth of the carving can be regulated.
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. The method of producing carved ornamental designs on wood by means of a
machine provided with chisels or cutters fixed at different angles to each other and to
the wood to be carved, working with an oscillating motion.
2. The method of regulating the depth of the carving produced by the chisels in
such machines by means of an adjustable board C supporting directly or indirectly the
wood under operation.
3. The arrangement for feeding a machine as described consisting essentially of a
rack (attached directly or indirectly to the wood to be carved) pushed onward by means
of an angle feed lever.
All substantially in the manner as and for the purposes described and as shewn in
the drawings.
London, 27th of March 1889.
ERNST JÜRGEN CHRISTIAN KÖSTER.
Per C. R. Bonne & Co.,
41, Eastcheap, E.C., his Agents.