Improvements in Mortising Machines.
Year: 1895

page_text: Date of Application, 24th Jan., 1895
Complete Specification Left, 24th Oct., 1895-Accepted, 7th Dec., 1895
PROVISIONAL SPECIFICATION.
Improvements in Mortising Machines.
We, JOHAN NORRMAN, Joiner, of Skorped, Lännäs, and DAVID NIKOLAUS
SVENSAN-PEMER, Engineer, of Sundsvall, both in Sweden, do hereby declare the
nature of this invention to be as follows:-
:―
This invention relates to mortising machines having two chisels rendered
vertically reciprocating and adjustable towards each other, the object being to
provide means whereby a mortise can be cut and finished in a single operation.
The annexed drawing illustrates a morticing machine constructed after this
invention, Fig. I being an elevation and Fig. 2 a side view of the same.
1 and 2 are the two chisels, the guides of which carry nuts engaging respectively
a right and left threaded screw 3 fitted with a crank handle. When turning the
said screw in one direction the chisels are moved towards each other and when
turning it in the other direction from each other according to the size of the
mortise that is to be cut. Each of the said chisels is connected by means of
levers 5 and 6 to a cross-head 7 situated between the same. On the said head
a knife 4 (or knives) is fixed extending down nearly to the cutting edges of the
said chisels, each side of the knife 4 opposite the chisels 1 and 2 being formed
with a cutting edge. The cross-head 7 is fixed on a shaft 8 adapted to be
oscillated, for instance, by such as a lever 9 fixed to the shaft 8 which lever is
moved up and down by means of a crank and a connecting rod so as to oscillate
the said cross-head. This motion is transmitted through the levers 5 and 6 to
the said chisels which thereby are vertically reciprocated alternately and caused
to cut the mortise crosswise, whilst at the same time the knife 4 oscillating with
the cross-head 7 at every oscillation, cuts away the wood between the sides.
Dated this 23rd day of January 1895.
F. BOSSHARDT & Co.,
Agents to Applicants.
Improvements in Mortising Machines.
We, JOHAN NORRMAN, Joiner, of Skorped, Lännäs, and DAVID NIKOLAUS
SVENSAN-PEMER, Engineer, of Sundsvall, both in 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 invention relates to mortising machines having two chisels rendered
vertically reciprocating and adjustable towards each other, the object being to
provide means whereby a mortise can be cut and finished in a single operation.
And in order that our invention may be more fully understood we have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1, of the drawings filed with the Provisional Specification, is an elevation
and Fig. 2 a side view of a mortising machine constructed in accordance with
our invention.

page_text: In carrying out our invention, 1 and 2 are the two chisels, the guides of which
carry nuts engaging respectively a right and left threaded screw 3 fitted with a
crank handle. When turning the said screw in one direction the chisels are moved
towards each other and when turning it in the other direction from each other
according to the size of the mortise that is to be cut. Each of the said chisels is
connected by means of levers 5 and 6 to a cross-head 7 situated between the same.
On the said head a knife 4 (or knives) is fixed extending down nearly to the
cutting edges of the said chisels, each side of the knife 4 opposite the chisels 1 and 2
being formed with a cutting edge. The cross-bead 7 is fixed on a shaft 8 adapted
to be oscillated, for instance, by such as a lever 9 fixed to the shaft 8 which lever
is moved up and down by means of a crank and a connecting rod so as to oscillate
the said cross-head. This motion is transmitted through the levers 5 and 6 to the
said chisels which thereby are vertically reciprocated alternately and caused to cut
the mortise crosswise, whilst at the same time the knife 4 oscillating with the
cross-head 7 at every oscillation, cnts away the wood between the sides.
+
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim, is―
In mortising machines having two chisels rendered vertically reciprocating and
adjustable towards each other, connecting the said chisels 1 and 2 by means of
levers 5 and 6 movably to an oscillating cross-head 7 situated between the
chisels 1, and 2 which cross-head is also connected with a knife 4 (or knives)
extending downwards and having double edges facing the said chisels, for the
purpose of cutting away the wood left between the grooves, cut by the said chisels,
all substantially as set forth.
Dated this 23rd day of October 1895.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants.