Improvements in Machinery for Engraving and Carving.
Year: 1891

page_text: Date of Application, 2nd July, 1891
Complete Specification Left, 2nd May, 1892-Accepted, 4th June, 1892
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Engraving and Carving.
I, JOSEPH BEVERLEY FENBY, of Sutton Coldfield, in the County of Warwick,
Civil Engineer, do hereby declare the nature of this invention to be as follows :-
The object of this invention is to provide improved machinery for engraving and
carving.
My improved machine consists of a parallelogram having joints at its angles
allowing it to move in a horizontal direction. To one side of this parallelogram is
rigidly fixed a horizontal rectilinear slide which together with the joints at the
angles allows the opposite side of the said parallelogram a universal motion in a
horizontal plane. To any part of the side having the universal motion I fix a
tracer and any number of spindles capable of being driven by belt or other means.
These spindles are so placed that their centres all lie in a line drawn through the
centre of the tracer and parallel to the opposite side of the parallelogram, that is
the side fixed to the horizontal rectilinear slide.
At convenient parts of the machine wheels are provided to support the weight of
the parallelogram and afford freedom of movement. Those parts of the machine
which have a universal motion are carried on wheels which run on carriages. These
carriages are moved by, and in the same direction as, the slide.
To obtain a relief or depression in the work corresponding to the copy or dummy
the tracer and spindle box are allowed to slide in a vertical direction and are con-
nected together by means of universal and other joints and levers so as to reproduce
the up and down motion of the tracer in the spindle box.
The action of the machine is as follows:-The copy which is to be reproduced is
fixed under the tracer and the material to be operated on is secured beneath suitable
drills or cutters fixed to the spindles. The machine is then moved by hand so that
the tracer passes over the copy and the drills, which are driven at a high speed,
pass over the material to be operated on and cut out the design as governed by
the tracer. As many reproductions will be produced as drills are used.
•
The scale of the work in plan will necessarily be the same as that of the copy or
dummy but the vertical movement of the cutting tools and tracer may be so
relatively adjusted as to make the relief of the work greater or less than that of
the copy or dummy.
Dated this 1et dov of July 1801
J. BEVERLEY FENBY.
COMPLETE SPECIFICATION.
Improvements in Machinery for Engraving and Carving.
I, JOSEPH BEVERLEY FENBY, of Sutton Coldfield, in the County of Warwick,
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:-
The object of this invention is to provide improved machinery for engraving and
carving.
My improved machine consists of a parallelogram having joints at its angles
allowing it to move in a horizontal direction. To one side of this parallelogram is
rigidly fixed a horizontal rectilinear slide which together with the joints at the
angles allows the opposite side of the said parallelogram a universal motion in a
horizontal plane. To any part of the side having the universal motion I fix a

page_text: tracer and a spindle capable of being driven by belt or other means and carrying
a cutting tool. This spindle is preferably placed so that its axis lies in a line
drawn through the centre of the tracer and parallel to the opposite side of the
parallelogram, that is the side fixed to the horizontal rectilinear slide.
At convenient parts of the machine wheels are provided to support the weight of
the parallelogram and afford freedom of movement. Those parts of the machine
which have a universal motion are carried on wheels which run on carriages. These
carriages are moved by, and in the same direction as, the slide.
To obtain a relief or depression in the work corresponding to the copy or dummy
the tracer and cutting tool are allowed to slide in a vertical direction and are con-
nected together by means of universal and other joints and levers so as to reproduce
the up and down motion of the tracer with the cutting tool.
The action of the machine is as follows:-The copy which is to be reproduced is
fixed under the tracer and the material to be operated on is secured beneath the
cutting tool fixed to the spindle. The machine is then moved by hand so that the
tracer passes over the copy, and the tool, which is driven at a speed suitable to
the material to be operated on, passes over the said material and cuts out the design
as governed by the tracer.
The scale of the work in plan will necessarily be the same as that of 'the copy or
dummy but the vertical movement of the cutting tool and tracer may be so
relatively adjusted as to make the relief of the work greater or less than that of
the copy or dummy.
The accompanying drawings illustrate my invention.
Fig. I shews a plan of the machine,. Fig. II a side elevation and Fig. III a
front elevation. a, b, c and d are sides of a parallelogram having joints at its
angles cl, e², and allowing it to move in a horizontal direction. To the
side of this parallelogram is rigidly fixed a horizontal rectilinear slide. This
slide consists of two slide blocks e and connected together by the 'bar g. This
slide travels along the slide bars hand and together with the horizontal motion
of the parallelogram allows the side da universal motion in a horizontal plane.
To the bars a and b respectively are fixed brackets carrying wheels a¹ and a²,
and running on the carriage . The carriage & is supported on wheels ¹, k², k³
and running in the direction of the rectilinear slide on rails and m.
The
carriage is connected to the bar g and therefore moves with the slide. The
tension rods and steady the carriage in relation to the bar g, and the rods c³
and c steady the side e of the parallelogram also in relation to the bar g.
To the bard a plunger n and tool spindle o are fixed preferably at the ends.
The motion of the tool spindle is governed by the motion of the plunger in the
following manner :-The plunger n and tool spindle o are arranged to move in a
vertical direction. To the top of the plunger n the rod n' is hinged so as to
operate the lever n3 which is supported on the pillar 3. The lever operates the
plunger p by means of the connecting rod p'. The motion of the plunger p by
means of the connecting rod p², operates the lever o3 which is supported on the
pillar o. The lever o governs the up and down motion of the tool spindle o,
which is connected to the said.lever o by means of the micrometer screw o' having
ball joint o in the lever o². The plunger n may be raised or lowered by means
of the thumb lever t³ and may be locked at any portion of its traverse by means
of the key t¹.
:-
The action of the machine is as follows -The design which is to be copied is
fixed on the table and the material to be operated on is fixed on the tables.
A suitable tracer is fixed to the lower end of the plunger n, and a cutting tool to
the lower end of the spindle o. The operator takes hold of the handles t' andut?
and lowers the tracer into the copy by unlocking the key t and lowering the
plunger n by means of the thumb lever t³. The plunger may now be locked by the
key. The lowering of the tracer into the copy lowers the cutting tool so as to
cut the material. The operator now follows the copy with the tracer, and the tool
cuts a facsimile in the material. When the machine. is used to produce a constantly

page_text: varying relief as in carving, the plunger n is not locked, but is left free so that the
vertical contour of the copy may govern the up and down motion of the tracer and
so by means of the lever gear already described govern the up and down motion of
the cutting tool.
The cutting tool is set to the exact height required by means of the micrometer
screw of. The tables r and s may be raised or lowered by any suitable means such
as the screws and sand revolving nuts and s².
The spindle o is driven at a speed to suit the material to be operated on by a
cord v passing from an overhead pulley under the idle pulleys u' and u² and round
the pulley of on the tool spindle o.
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 :-
1. The machine for engraving and carving as described and illustrated.
2. In a machine for engraving and carving the combination of (1) a parallelogram
having joints at its four angles, (2) one side rigidly fixed to a slide at right angles
to the said side, (3) a side parallel to the said fixed side having a universal motion
in a horizontal plane and carrying a tracer and cutting tool whose vertical motions
are dependent on each other.
3. In a machine for engraving and carving a cross carriage k for supporting the
forward end of the parallelogram, the said carriage being attached to the slide
bar g and travelling by means of wheels or slides on the rails / and m.
Dated this 30th day of April 1892.
J. BEVERLEY FENBY.