Improvements in Chisels for Carpenters.
Year: 1899

page_text: Improvements in Chisels for Carpenters.
I, PAUL WOLF, of 16, Lanferplatz, Nurnberg, in the Empire of Germany, 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 improvements in chisels specially designed for the
use of carpenters when mortizing or for cutting or trueing two sides of a hole
or recess in a beam or piece of wood at one and the same time. The invention
consists of a double bladed chisel the distance apart of the cutting
edges of which can be adjusted and set, and the handle can also
be adjusted and fixed in relation to the blades. By use of the improved
chisel the edges or sides of holes or mortices can be cut or trued with ease and
rapidity.
Such being the nature and object of my said invention, the following is a com-
plete description of same, reference being had to the annexed drawings, in
which;-
Fig. 1 is a front elevation of the improved chisel.
Fig. 2 is a transverse section on line A B of Fig. 1.
Fig. 3 is a longitudinal sectional view of the hinge of the chisel shewing a
tapered hinge pin.
Fig. 4 is a similar view to Fig. 3 shewing a tapered corrugated head and
sleeve on the hinge pin.
Fig. 5 is an end sectional view of Fig. 4.
According to this invention a bare the blades or cutters of the chisel and f
the handle of same. The cutters ab are hinged to the handle f and can be
set either straight or at an angle thereto, after adjustment, by means of the
hinge pin d which is provided with a head h, at one end and a collar or sleeve c
at the other. The head h and the collar or sleeve c are serrated or corrugated
as at i (see Fig. 2) that slipping or turning of the hinge is prevented. The hinge
is tightened and fixed by means of the winged nut o. The blades a b can be
adjusted as to their distance apart by means of the screw k which passes through
both cutters or blades a band is provided with nuts 1 2 inside the blades or
cutters a. and with nuts 3 outside the said blades or cutters. The chisel is
used when morticing, or cutting holes into or through beams or blocks of wood.
Instead of the hinge pin d (see Fig. 1) being used, a tapered pin m, (see Fig. 3)
may be employed and drawn tightly into the hinge and fixed by means of the
nut n. In Fig. 4 the hinge pin d is shewn with two corrugated and tapered ends,
one a fixed head h, the other a loose collar or sleeve p. By screwing up the
winged nut c the parts h and p, are drawn towards one another and the hinge
fixed. The corrugations prevent liability of the hinge slipping when adjusted
and set.
i

page_text: Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim 18:
(1) The general construction, arrangement, and combination of parts constitut
ing the improved chisel as and for the purpose herein described and substantially
as illustrated by the annexed drawings.
(2) A chisel having two cutters adjustable as to distance apart and to the
handle as herein described and substantially as illustrated by the annexed
drawings.
PAUL WOLF,
By his Agents,
Brierley & Howard,
Penny Bank Chambers, Halifax.