Improvements in Carving Machines.
Year: 1891

page_text: Date of Application, 27th Feb., 1891
Complete Specification Left, 9th Nov., 1891--Accepted, 19th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in Carving Machines.
I ALEXANDER WENZEL of 111 Prinzenstrasse Berlin in the Empire of Germany,
Civil Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to machines for carving designs or pictures upon or in
wood or other material by means of a carving or cutting tool moved in conformity
with the movement of a stylus or guiding point over the pattern to be copied.
The principal objects of the improvements are to render the movements of the
cutting tool more exact with regard to the stylus and also to so mount the stylus
and cutting tool that undercut designs may be carved without changing the position
of the pattern or of the block or matter operated upon.
On a suitable frame, carrying the work table on which the pattern and the
block to be carved are fixed, are two parallel rails, one each side, supporting
respectively two trestles running on rollers on the rails and having also rollers
moving under the rails aforesaid so that the trestles cannot rise from the rails.
The two trestles are connected by cross bars to move together and form
substantially one frame. This trestle frame carries and guides a vertically
movable frame balanced by springs the tension of which may be adjusted by ratchet
wheels and pawls. This vertically movable frame having a part sliding in each
trestle carries in such parts roller bearings for a shaft which therefore lies
transversely over the work table and is movable longitudinally and rotarily. This
shaft carries two similar heads or holders one for the stylus moving in the pattern
and the other for the cutting tool moving on the block to be cut.
The head or holder is constructed as follows. An arm movable along the shaft
and having a set screw for clamping it on the shaft terminates at the outer end in
a disc on which revolves a second disc with means for clamping it, the second disc
carries a rod lying in bearings diagonally across the disc, the rod carries at its end
a clamp for holding the tool or stylus respectively.
The work table is made vertically adjustable by means of a vertical screw and
nut operated by bevelled gear from a horizontal shaft having a square head to be
moved by a suitable crank handle.
Dated this 27th day of February 1891.
HERBERT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Carving Machines.
I ALEXANDER WENZEL of 111 Prinzenstrasse, Berlin in the Empire of Germany
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 carving designs or pictures upon or in
wood or other material by means of a carving or cutting tool moved in conformity
with the movement of a stylus or guiding point over the pattern to be copied.
The principal objects of the improvements are to render the movement of the
cutting tool more exact with regard to the stylus and also to so mount the stylus
and cutting tool that undercut designs inay be carved without changing the position
of the pattern or of the block or matter operated upon.
On a suitable frame carrying the work table on which the pattern and the
[ Price 81

page_text: block to be carved are fixed, are two parallel rails, one each side supporting
respectively two trestles running on rollers on the rails and having also rollers
moving under the rails aforesaid so that the trestles cannot rise from the rails.
The two trestles are connected by cross bars to move together and form substantially
one frame.
This trestle frame carries and guides a vertically movable frame
balanced by springs, the tension of which may be adjusted by ratchet wheels and
pawls. This vertically movable frame having a part sliding in each trestle
carries in such parts roller bearings for a shaft which therefore lies transversely
over the work table and is movable longitudinally and rotarilarly. This shaft
carries two similar heads or holders one for the stylus moving in the pattern and
the other for the cutting tool moving on the block to be cut.
The head or holder is constructed as follows:-An arm movable along the shaft
and having a set screw for clamping it on the shaft terminates at the outer end in
a disc on which revolves a second disc with means for clamping it, the second disc
carries a rod lying in bearings diagonally across the disc, the rod carries at its end
a clamp for holding the tool or stylus respectively.
The work table is made vertically adjustable by means of a vertical screw and
nut operated by bevelled gear from a horizontal shaft having a square head to be-
moved by a suitable crank handle.
In the annexed drawings which illustrate a machine constructed with the
improvements above referred to.
Fig. 1 is a longitudinal section and
Fig. 2 is a cross section of the machine.
Figs. 3. 4. 5 and 6 are detail views of one of the heads on an enlarged scale.
The novelty and the peculiarity of the machine consists principally in the
arrangement of the head and the parts operating and guiding the same.
On the frame A is located the table B which can be adjusted in its position of
height by the screw threaded spindle C and the conical wheels D E. On the
table are the supports H carrying the model F and the block G to be carved.
The models F and the blocks & may be of various sizes and there may be any
optional number of blocks. On the frame A are fastened the guide rails J on
which are the two trestles L which can be moved on the rollers K.
The trestles L are connected together by bar L' and carry above and below
bushes M in which the vertical bars N connected above by the beam M¹ move up
and down. The bars N each carry a roller journal O in which the shaft Q is
journalled to rotate and move longitudinally. To prevent the trestles from lifting
off the rollers K are provided. On the shaft Q are the heads S S¹ the latter in
optional number they are prevented from revolving on the shaft by a feather and
groove but may be adjusted lengthwise on the shaft. In order to render it possible
to work in a vertical and oblique fashion with the tools in the heads S S', the
latter are constructed as follows reference being made to Figs. 3 to 6.
The arms on the shaft Q has a flange s¹ with the slots s² on which is secured the
revolving flange t for the bearing t¹ of the spindle u' carrying the tool u in the
centre clamp u³.
It is understood that this rotary journalling of the tool holder may also be
obtained in any other suitable manner.
In the present construction the heads S S¹ can be rotated in one plane by the
rotation the shaft Q and also in a transverse plane by their movement alone around
the supports by means of the rotary connection provided in the flange s¹; the tool u
may thus be guided in any direction downward or sideways towards the block G
and thus without necessitating a re-adjustment of the latter it can be carved on all
sides except that lying, below. In order to maintain the parts moving up and
down always in proper balance the springs 1 are provided on the beam L', these
springs carrying at their outer ends the sliding rollers 4 and at their inner ends the
ratchet wheels 2 with the pawls 3 for adjustment of their tension. For balancing
the shaft the counterweights W are provided. The propelling of the spindles u¹
is done by means of flexible shafting not shown in the drawing.

page_text: Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is
In a wood carving machine.
1. The heads S S₁ arranged to move on the shaft Q each head consisting of an
arms with the flange s on which is arranged to rotate the flange t of the bearing t¹
of the tool spindle u' for the purpose of enabling the tool to turn laterally, that
is parallel to the axis of the shaft Q.
2. The arrangement of the operating shaft Q in the roller journal O for the
purpose of guiding the tool in different angles to the working surface and also to
give a laterally adjustable motion to the heads.
3. The sliding bars N connected by the beam M' and provided with the roller
journals O receiving the shaft Q for up and down adjustment of the heads.
4. The above devices in combination with the trestles L connected by the bars L'
and movable on the rollers K for the purpose of displacing the heads.
5. The above devices in combination with the vertically adjustable table B.
Dated this 9th day of November 1891
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.