An Improved Mechanical Engraver and Means of Actuating same.
Year: 1890

page_text: Date of Application, 7th Aug., 1890-Accepted, 27th Sept., 1890
COMPLETE SPECIFICATION.
An Improved Mechanical Engraver and Means of Actuating same.
We GABRIEL LEVY Draughtsman and Engraver; and THOMAS CLEARY Mechanic,
both of 454 Collins Street, Melbourne, in the Colony of Victoria, Australia, 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,
reference being had to the accompanying sheet of drawings and to the letters and
figures marked thereon, that is to say :-
The object of this invention is to produce an apparatus or instrument for engraving
by mechanical means and by a motor in such a manner that an uniformity and
correctness of workmanship is attained without the aid of bodily exertion or expert
labor which is not indispensable to its working as by the special construction of its
reciprocatory mechanism a copy can be set and a reproduction on any scale is
formed in the material being operated upon.
By the use of this invention devices letters or other required shapes can be made
in wood metal or other material by mechanically forming recesses in the material by
a drill or other cutting instrument to which motion is imparted preferably by means
of rotary flexible shafting.
The essential features of this invention consist: 1st in the use of a drill or other
cutting instrument attached to a pantograph ediograph or like contrivances which
are designed for the purpose of copying enlarging or reducing in due proportion
from any copy or model agreed upon. The drill takes the place of the pencil or
reproducer so that as the tracer moves along the contour of the original copy the
drill will move in a reciprocatory manner, the size of the duplicate being determined
by the arranging of the pivots of the pantograph. The 2nd essential feature of the
invention consists in the drill being driven by a flexible shaft rotating at the necessary
speed, the object of this being to give ease in the manipulation of the drill which is
rendered imperative and even a necessity by reason of the intricate nature of the
work performed.
This invention is applicable to many industries and is specially adapted for cutting
out wood type for printing also brass plates and engraving on glass and for forming
devices in wood and stone as for capitals cornices and other architectural uses and
can be used with great success in connection with any work in which recesses are
required so as to produce "relief" effect.
In order that our invention may be the more clearly understood reference may now
be had to the accompanying drawings in which:
Fig. 1. is an isometrical view showing the general arrangement of the engraver.
Figs. 2, 3, and 4 being a section, end elevation and plan view respectively of the
drill attachment and its method of connection to the flexible shafting.
, In these drawings A is the spindle working in the sliding sleeve A' which is kept
in proper position on the arm of the pantograph by the set screw A³, the upper
part of the spindle is formed as a hook As which clasps another similar hook B
attached to the flexible shaft B'. To the lower end of this spindle A' is screwed or
otherwise attached the socket A having a recess A for the drill or cutting
instrument A to be held firmly therein, a small screw A' is further provided so as to
keep the socket A* from altering vertically in position-Suitable projections As are
formed on the sleeve A' or the shoulder A and socket A to work against. On the
sleeve handles A are attached for guiding the drill when heavy work is being
performed.

page_text: C is the pantograph and the arm thereof to which the sleeve A' is attached, the
former is made with a slot C which can be of any length for allowing the spindle A
to work in and is provided with a thumbscrew C3 or other equivalent for adjusting the
height of the apparatus so as to regulate the depth of cut of the instrument A. is
the tracer which moves along the contour of the original design C, which is desired to
be reproduced.
Ce are the castors placed under each joint for rendering the working of the
mechanism easy. D is the pivot or axis (also made adjustable) upon which the whole
apparatus turns and its base is made of lead or other heavy material so as to keep it
firm. In machines of heavier description and where the resistance to the drill is
great, this centre would require to be fixed. more firmly to the table or frame as
necessity would demand.
Spaces D' are marked off on the arms for guidance in regulating the apparatus to
any scale. E is the table or base on which the whole apparatus works, F being the
material under treatment for a reproduction of the original model C³.
We do not confine ourselves to the size or materials of construction of the apparatus
nor to the nature of the motive power employed, nor limit ourselves to the application
of the invention as it can be used in all cases where a recess in any materials is
required to be formed.
If desirable we can use the drill without the pantograph where the latter would be
inconvenient as for instance around the capitals of columns of buildings. In this case
A may be removed by unscrewing A3 and A', first having removed the thumbscrew
attachments C3 and C, the spindle A can be then withdrawn and A' easily removed
from bar ("; the working parts pertaining to A' can be again fitted thereto and the
machine may be worked independently of the frame C.
Rotary motion of the requisite speed being imparted to the spindle A by the hook
attachment A from the flexible shafting B', the drill or other instrument A used is
set in motion ready for operation.
The original model C³ to be copied is placed under the tracer C of the pantograph C
and the sleeve A¹ is placed on the arni at the suitable distance from the central
pivot D so as to give the drill the same travel as the tracer, the sleeve A. being firmly
held in position by the set screw A2; the part of the material F to be operated on is
placed under the drill A, the operator now guides the tracer C along the contour of
the original (which action is rendered easy by the castors C³) and the drill is found
to make a reciprocatory motion with the result that a similar copy to the original is
produced; the depth of the recess in F is adjusted by the thumbscrew C³ or other
equivalent.
When a reproduction on a larger or a smaller scale to that of the original is required
it is effected by altering the distance of the sleeve A¹ from the axis or pivot D, which
is also made to move along on its arm; both these arms are spaced D¹ so as to render
proportioning" easy.
"1
When it is desired to work the drill or cutter A and sleeve A' independently of
the frame C the operator firmly holds and guides the instrument by the handles A
along the prescribed lines previously marked down, the motion the while being imparted
by the flexible shaft.
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 :-
1. In mechanical engravers the use of a rotating drill attached to a pantograph or
similar contrivance for the purpose of forming recesses in materials so as to produce
letters devices or ornaments in relief in a facsimile enlarged or reduced size to that
of the original substantially for the purposes herein described and explained and as
illustrated on the accompanying drawings.
2. In mechanical engravers the use of flexible rotating shafting to drive a drill or

page_text: similar cutting instrument attached to a pantograph or similar contrivance substan-
tially for the purposes herein described and explained and as illustrated on the
accompanying drawings.
Dated at Malkonano this o6th day of Inno 1890
GABRIEL LEVY
THOS. CLEARY.