A. NEW OR IMPROVED BEVIL TENON CUTTING MACHINE
Year: 1876

page_text: LETTERS PATENT to Gerard Wenzeslaus von Nawrocki, of the Firm of
J. Brandt and G. W. v. Nawrocki, Civil Engineers and Patent Agents, of
Berlin, in the Empire of Germany, for the Invention of "A. NEW OR IMPROVED
BEVIL TENON CUTTING MACHINE." A communication from Friedrich Heine-
mann, residing at Baumeister, near Magdeburg, in Saxony.
PROVISIONAL SPECIFICATION left by the said Gerard Wenzeslaus von
Nawrocki at the Office of the Commissioners of Patents on the 23rd December
1876.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of "J. Brandt & G. W.
v. Nawrocki," Civil Engineers and Patent Agents, of Berlin, in the Empire of
Germany.
A NEW OR IMPROVED BEVIL TENON CUTTING MACHINE" A com-
munication from Friedrich Heinemann, residing at Baumeister, near Madgeburg, in
Saxony.
This Invention has for its object a new or improved bevil tenon cutting machine,
by the use of which the dovetailing machinery may be entirely dispensed with, and
I will now proceed to describe, with the aid of the accompanying Drawings, the
construction of such improved machine.
Figure 1 represents a plan view thercof. c, e, are two tables, having sloping
edges ff, to which are attached two sliding hooks g, g; X, X, are two adjustable
projecting pieces; i, i, are guide levers; h, h, are the cutting discs or circular saws;
and I., II, and III. are the driving drums. The cutting discs h, h, must be filed
bevel, so that the line of bevil agrees with the sloping edges f, f, and the points of
the teeth must be set in steps, as is shewn in the Drawing, by which means the
cutting discs cut easily.
When it is required to cut tenons in boards for making cases or for other purposes
the board is laid rectangularly on the left table in front of the sloping edge f, and
against the guide lever i, by which the board is carried rectangularly against or
towards the sloping edge f, and in this manner the oblique cut seen from above is
cut by the cutting discs. The board is thon drawn rectangularly back again from
the sloping edge f, and the second edge placed against the lever and the second cut
made, in this way obtaining the second tenon and the second notch, and so on,

page_text: according to the width of the side. When the board is cut at one end it is turned
over and its other end laid on the right-hand machine table, when it is cut as
before, and the same holds good with each single board it is intended to put in the
case or other article. When the two sides are ready, with a tenon cut to commence
with, the end pieces of the sides are cut with a shoulder of the width of the cutting
discs, and then the cut edge is again laid against the guide lever i and the tenons
cut as before. On putting the case, box, or other article together it is requisite that
the edge of the end piece which has been cut on the right-hand table be joined to
the end of the side piece which has been cut on the left-hand table, and the other
edge of the end piece be joined to the end of the side piece which has been cut on
the right-hand table, and so on.
Figure 2 is a front view of the machine, wherein the two sloping tables
marked k, k, are seen, by which the second bevil of the tenon or notch is made.
As the machine tables k, k, are at present adjusted tenons and notches 30 mille-
metres long may be cut; but should it be required to cut thicker or thinner boards
the table can be moved backwards or forwards by means of the set screw m
placed underneath the table, and according to the thickness of the wood it is
requisite to cut.
Should broader tonons be required the guide levers i, i, are by means of the nuts
placed so far back that a third or fourth cutting disc may be mounted on the
cutter spindle, but the space between the guide levers i, i, and the cutting disc
must be exactly the same as is the length of the notches cut by the cutting discs.
SPECIFICATION in pursuance of the conditions of the Lettera Patent filed by
the said Gerard Wenzeslaus von Nawrocki in the Great Seal Patent Offico
on the 23rd June 1877.
GERARD WENZESLAUS VON NAWROCKI, of the Firm of "J. Brandt and G. W.
v. Nawrocki," Civil Engineers and Patent Agents, of Berlin, in the Empire of
Germany. "A NEW OR IMPROVED BEVIL TENON CUTTING MACHINE." A com-
munication from Friedrich Heinemann, residing at Baumeister, near Magdeburg, in
Saxony.
This Invention has for its object a new or improved bevil tenon cutting machine,
by the use of which the dovetailing machinery may be entirely dispensed with, and
I will proceed to describe, with the aid of the accompanying Drawings, the con-
struction of such improved machine.
Figure 1 represents a plan view thereof. The working parts of the machine are
carried on a rectangular framing of the ordinary kind. e, e, are two tables, having
bevilled or angular edges f, f, to which are attached the two sliding guides g, g;
x, x, are two adjustable projecting pieces; i, i, are guide levers; h, h, are the
cutting discs or circular saws; and I., II., III. are the driving drums.
The cutting
discs h, h, are filed to the required bevil, so that the line of bevil agrees with the
angle of the edges f, f, and the points of the teeth are set in steps, as shewn in the
Drawing; by this means the cutting discs cut quickly and easily through
the wood.
When it is required to cut tenons in boards for making cases or for other purposes
the board is laid rectangularly on the left table in front of the sloping edge f, and
against the guide lever i, by which the board is carried rectangularly against or
towards the angular edge f, and in this manner the oblique cut is made by the
cutting discs. The board is then drawn rectangularly back again from the sloping
edge f, and the second edge placed against the lever and the second cut made, in
this way obtaining the second tenon and the second notch, and so on, according to
the width of the side. When the board is cut at one end it is turned over and its
other end laid on the right-hand machine table, when it is cut as before, and the

page_text: same holds good with each single board it is intended to put in the case or other
article. When the two sides are ready, with a tenon cut to commence with, the
end pieces of the sides are cut with a shoulder of the width of the cutting disc, and
then the cut edge is again laid against the guide lever and the tenons cut as
before. On putting the case, box, or other article together it is requisite that the
edge of the end piece which has been cut on the right-hand table be joined to the
edge of the side piece which has been cut on the left-hand table, and the other edge
of the end piece be joined to the end of the side piece which has been cut on the
right-hand table, and so on.
Figure 2 is a front view of the machine, wherein the two sloping tables
marked K, K, are seen, by which the second bevil of the tenon or notch is made.
As the machine tables K, K, are at present adjusted tenons and notches 30 milli-
metres long may be cut; but should it be required to cut thicker or thinner boards
the table can be moved backwards or forwards by means of the set screw m
placed underneath the table, according to the thickness of the wood it is requisito
to cut.
Should broader tenons be required the guide levers i, i, may by means of tho
nuts i, i, be placed so far back that a third or even fourth cutting disc may be
mounted on the cutter spindle, but the space between the guide lever i and the
cutting disch must be exactly equal to the length of the notches made by the
cutting discs.
In the section, Figure 3, Sheet 2, is shewn how the sloping tables by means of
the joint n on the front edge are adjusted accurately to the ledge O, and by means
of the set screws P under the inner edge of the table how they can be raised when
it is required to cut thinner boards, so that the thickness of the wood on being cut
lies exactly at the height of the centre of the cutting disc spindle, and in such
manner that the inner and outer edges of the cut are equally deep, so that the caso
when put together is true and perfectly square.
In the side view, Figure 4, Sheet 2, the table e and ledge ƒ are seen in the
sloping position, as from above, with their projecting pieces ac. The projecting
piece or guide may be lowered by means of two screws, and adjusted with the
upper surface or table, when the tables are moved backwards or forwards, according
to the cut required, so that the projecting piece x always guides straight and
directly in front of the cutting disc in order that the wood on its under or outer
side is cut off smoothly and cannot break away.
Having now particularly described and ascertained the nature of my said Inven-
tion and the manner of carrying the same into effect, I would have it understood
that what I claim and desire to secure by the herein-before in part recited Letters
Patent is, the general arrangement, construction, and combination of mechanical
parts forming the new and improved bevil tenon cutting machine, substantially as
herein-before described and illustrated.
In witness whereof, I, the said Gerard Wenzeslaus von Nawrocki, have here-
unto set my hand and seal, this Sixteenth day of June, in the year of our
Lord One thousand eight hundred and seventy-seven.