Improvements in Mortising Machines.
Year: 1894

page_text: Date of Application, 15th Jan., 1894
Complete Specification Left, 13th Oct., 1894-Accepted, 17th Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in Mortising Machines.
I, DAVID NICHOLAS of Laurel Villa Stroud Road, Gloucester in the County.
of Gloucestershire do hereby declare the nature of this invention to be as:
follows:-
The said invention relates to improvements in mortising machines by means of
which the canting of the table can be regulated to a given angle instantaneously
and easily, thus obviating the necessity for careful adjustment and measurement of
angles.
This object is effected by means of an apparatus, the essential feature of which is
a spring stop, which is attached to the table of the mortising machine, the end of
which stop passes through a hole in the table casting into one or other of a series of,
holes in the main casting of the machine, thus determining the angle at which the
table is to be fixed for the time being.
The extremity of the stop which passes through the holes of the castings can be
tapered to facilitate entrance, and the spring, above referred to, forces it into position
when the hole in the table comes opposite one or other of the holes in the main
casting. The stop is readily withdrawn by means of a handle at its other extremity
and the table thus released.
The holes in the main casting are arranged in the form of a quadrant, or portion
of a circle, whose radius corresponds with the distance between the centre of the
pivot on which the table cants, and the centre of the hole in the table casting
through which the stop passes. One or more holes may be used in conjunction with
my invention according to the variety of angles to which it is required to tilt the
table. My invention is specially applicable to the cutting of what are known
28 "wedge mortises," but is also suitable for cutting mortises at any required
angle.
My invention can either be embodied in the construction of machines or cau be
added as an attachment to existing mortising machines of suitable design.
Dated this Twelfth day of January 1894.
COMPLETE SPECIFICATION.
Improvements in Mortising Machines.
DAVID NICHOLAS, Laurel Villa, Stroud Road, Gloucester, Joiner, 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:
The invention consists in providing an attachment to a mortising machine whereby
the table can be canted and fixed at any desired angle so that mortises may be cut
obliquely through the wood. This object is effected by means of a spring stop
which is attached to the bracket which carries the table of the machine, and which
passes through it, and into a series of holes in the slide which is usually provided
for carrying the table and bracket. In the drawing A. is the table of the machine
on which the wood to be mortised is held, and B. the bracket on which it slides,
and C. is the vertical slide which carries the table and which can be raised or
lowered by the foot of the operator. The bracket B. is pivoted to the slide C. on a

page_text: pin D. on which the bracket and table can he canted. And in order to retain it in
its proper position the stop E. is provided, carried on the bracket F. & kept up by
the spiral spring G. The stop E. is provided with a handle H. and passes through
a hole in the face of the bracket B. into a series of holes I, II in slide C. the
centres of which are equidistant from the pin D. The action of the apparatus is as
follows:--The table is in a horizontal position where the stop is in the hole 1' in
order to cant it to any angle to the right or left, the stop E. is withdrawn by the
handle H, and the table tilted by the operator. The handle is then released and
the spring can push it into any of the holes in the series I' 13 & 1. There may be
any number of holes in the series 11 12 1ª although 3 are shown in the drawings, in
which:-
Fig. 1 is the front elevation,
Fig. 2. the side elevation, &
Fig. 3. 4. 6. front elevation, side elevation, and plan respectively of the stop E.
with its spring and attachments, drawn to an enlarged scale.
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 :-
"
The apparatus for holding the table of a mortising machine at such an angle that
oblique mortises or such mortises as are known as "wedge mortises are enabled to
be cut in one process.
Dated this 13th day of October 1894.
DAVID NICHOLAS.