Improvements in Electrically Operated Engraving Tools.
Year: 1897

page_text: Date of Application, 17th June, 1897
Complete Specification Left, 14th Mar., 1898-Accepted, 28th May,
1898
PROVISIONAL SPECIFICATION.
Improvements in Electrically Operated Engraving Tools.
We, MAX BYNG, Electrical Engineer, and HENRY BURGE, Electrician, both of
Nos. 69-71-88, Queen Victoria Street, in the City and County of London, do
hereby declare the nature of this invention to be as follows:-
Our invention relates to certain improvements in electrically operated en-
graving tools, of the type or class in which a cutting tool or graver is enclosed
within a hollow stylus, and to which a reciprocating motion is imparted. The
object of our said invention is to construct a light and simple tool which may be
manipulated with the freedom of an ordinary stylus or graver.
In carrying our invention into effect we construct a hollow stylus, which con-
tains and forms a guide for a graving tool, the cutting edge of which projects
below the tapered point. The tube forming said stylus is fitted with a box at
its upper end, in which a spindle is mounted in suitable bearings arranged at
right angles to the stylus aforesaid. The inner end of said spindle carries a
crank with a comparatively small stroke, the pin of which engages with a slotted
cross head formed upon, or attached to the top of the graving tool hereinbefore
referred to. Thus the rotation of the spindle causes the graver to have a recipro-
cating movement, making a number of small indents in the metal surface to
which the stylus is applied, these being so numerous and close as to practically
present a perfect line according to the movement imparted to said stylus by the
hand of the operator. A flexible shaft, of any known type is attached to the free
end of the spindle outside the box aforesaid, and serves to connect it to the
driving spindle or shaft of an electric motor, the rotation of which maintains
the reciprocating movement of the graving tool. The flexible shaft admits of
the free manipulation of the stylus, and in order to compensate any drag"
incidental to the diversion of said shaft, we may attach a bracket or arm to the
box upon the opposite side to the spindle, and arrange an adjustable counter-
weight upon said arm.
$6
We do not confine ourselves to the employnient of a crank and slotted cross-
head, but may use an eccentric disc and strap, or a cam with a spring return
movement, or any equivalent device for the purpose, the essential feature of our
said invention being the production of the necessary reciprocating movement
within the tool itself, and the provision for free manipulation thereof by the use
of a flexible shaft in combination with a suitable electric motor, which may be
permanently fixed at any distance from the point of operation.
1007

page_text: Improvements in Electrically Operated Engraving Tools.
We, MAX BYNG, Electrical Engineer, and HENRY BURGE, Electrician, both of
Nos. 69-71-88, Queen Victoria Street, in the City and County of London, 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:-
Our invention relates to certain improvements in electrically operated en-
graving tools, of the type or class in which a cutting tool or graver is enclosed
within a hollow stylus and to which a reciprocating motion is imparted. The
object of our invention is to construct a light and simple tool which may be
manipulated with the freedom of an ordinary stylus or graver.
In order that our invention may be the better understood, we have appended
the accompanying sheet of drawings in which Figure 1 is a front sectional eleva-
tion of a tool or stylus, and Figure 2 a side elevation thereof. Figures 3 and 4 are
front sectional elevations of part of a tool or stylus, showing modifications.
Similar letters of reference indicate corresponding parts throughout the several
views.
In carrying our invention into effect we construct a hollow stylus A which
In
contains and forms a guide for a tool holder B carrying a graving tool a.
some cases a may form an integral part of B. The cutting edge of the tool a
projects below the tapered point C, which may form a removeable cap as shown.
The hollow stylus A is furnished with a box D at its upper end, in which a
spindle c is mounted in suitable bearings arranged at right angles to the stylus A
and tool a as shown by Figure 2. The inner end of the spindle c carries a crank d
with a comparatively short stroke, the pin e of which engages with a slotted cross-
head f, formed upon or attached to the tool holder B. Thus, when the crank d
is rotated by the spindle c, the graver or tool a has a slight reciprocating move-
ment imparted to it, which in practice is very rapid, and when the point is applied
to a metal or other surface to be engraved, a series of fine indents are formed
therean. These are so numerous and close together as to present a perfect line
according to the movement of the stylus A by the hand of the operator. A
flexible shaft E of any known type is attached to the free end of the spindle c,
outside the box D, and serves to connect it with the driving spindle or shaft of
an electric motor, the rotation of which maintains the reciprocating movement
of B and a. The flexible shaft E allows of the free manipulation of the stylus A,
which is provided with a heavy counterpoise F, which may be above the box D
as shown or be placed on the side thereof, opposite the shaft E.
We may, as an alternative device employ an eccentric cam and strap 9 instead
of the crank and slotted crosshead hereinbefore mentioned, or a crank d Figure 3,
and connecting link h, coupling said crank with the tool holder B, the recipro-
cating action being the same.
The advantage, according to our invention lies in the motor being placed at
a distance from the stylus or graver, thus not impeding its action, and the flexible
shaft allowing of free movement in any direction.
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:
First. In an electrically operated engraving tool the combination of a stylus
carrying a crank and reciprocating graving tool with a flexible shaft attached
to the spindle of an electric motor substantially as herein described.

page_text: Second. In an electrically operated engraving tool, the combination of a crank,
cross head and tool or toolholder, contained within a hollow stylus, with a flexible
shaft, substantially as herein described with reference to Figures 1 and 2 of the
accompanying drawings.
Third. In an electrically operated engraving tool, the combination of a cam
and strap and tool or toolholder contained within a hollow stylus, with a flexible
shaft substantially as herein described with reference to Figure 3 of the accom-
panying drawings.
Fourth. In an electrically operated engraving tool, the construction and arrange-
ment of parts, substantially as and for the purposes herein described, with refer-
ence to the drawings hereto appended.
Datu
UL
FREDK. WALKER,
73, St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.
FREDK. WALKER,
73, St. Stephen's Road, Upton Park, London, E.,
Agent for the Applicants.