A MECHANICAL PROCESS OF ELECTRO ENGRAVING BY MEANS OF AN ELECTRO- MAGNETIC ENGRAVING MACHINE
Year: 1867

page_text: LETTERS PATENT to Pierre Elie Gaiffe and Amédée Arthur Lalance, of
29, Boulevart St. Martin, Paris, Engineers, for the Invention of "A
MECHANICAL PROCESS OF ELECTRO ENGRAVING BY MEANS OF AN ELECTRO-
MAGNETIC ENGRAVING MACHINE."
Sealed the 12th July 1867, and dated the 8th February 1867.
PROVISIONAL SPECIFICATION left by the said Pierre Elie Gaiffe and
Amédée Arthur Lalance at the Office of the Commissioners of Patents,
with their Petition, on the 8th February 1867.
We, PIERRE ELIE GAIFFE and AMÉDÉE ARTHUR LALANCE, of 29, Boulevart
St. Martin, Paris, Engineers, do hereby declare the nature of the said
Invention for "A MECHANICAL PROCESS OF ELECTRO ENGRAVING BY MEANS OF AN
ELECTRO-MAGNETIC ENGRAVING MACHINE," to be as follows:-
Our Invention relates to apparatus for producing engraved designs on any
scale on plane surfaces, either sunk or in relief. It consists of two plates, a
large and a small one, the large one carrying the pattern or design to be..
reproduced. This design is formed of insulating substances on a metallic
base, the small plate carries the plate or stone on which the engraving is to be:
produced, and the two plates are each furnished with a movable carrier
regulated by suitable mechanism so as to limit their motion more or less,.
the carrier mounted above the pattern supports a platina tracer, while the
other (above the plate) carries the graving, tool.

page_text: This apparatus is represented in the accompanying Drawings, Figure 1 of
which shows an elevation,, Figure 2 a plan, and Figure 3 end view, while
Figure 4 shows the graving tool separate, and Figure 5 a separate view of the
tracer. Motion is imparted to the shaft z. of the machine in any suitable
manner and through a bevil pinion from. it to a second shaft y, which imparts
motion by means of endless screws to the upright shafts x, x, on which are
mounted the plates C, D, another endless screw v keyed on the end of the
shaft 9 gives motion to a small vertical shaft u actuating a series of change
wheels a, according to the scale of the design shaft u, also gives motion to a
shaft at top of the machine which transmits motion to the carrier n above
the pattern plate by means of screw r, the carrier o above the plate to be
engraved is actuated by screw q. The pattern carrier is provided with a small
pointer B termed a style or tracer which travels over the design or original,
describing very close spiral or volute lines starting from the centre. The other
carrier is furnished with a graver A, operated by an electro-magnet, and placed
in connection with the tracer of the pattern design by an electric wire, the
graver being raised or lowered accordingly as the current is interrupted by the
passing of the tracer over the metal or insulating material of which the
pattern design is composed.
In Figure 4 which shows the electro-magnet, A is the binding stud
communicating by an electric wire with the tracer; B, stud communicating
with one pole of the battery; C, electro-magnets; D, armature; E, adjustable
balance weight; F, diamond or graver. In Figure 5, A' is the stud communi-
cating with the stud A of the graver; B, adjustable balance weight; C,
platina wire tracer. The discs or plates C, D, Figures 1 and 2, being rotated
simultaneously every time the tracer passes over a metallic part of the pattern
design the current will pass to the electro-magnet C, Figure 4, and the graver
F will be raised; on the contrary when the tracer passes over an insulated part
the current will not pass to the electro-magnet, and the engraving will be
traced at any depth desired. By forming two distinct circuits of electric wire,
one passing to the tracer and the other to a metallic point, relief 'engraving
may be produced similar to wood engraving; in this case the point would remove
the varnish every time the tracer, passed over the metallic portion. The
transverse movements of the carriers supporting the lever arms and graving
tool is, as before mentioned, produced by a series of toothed wheels which are
changeable and arranged according to the scale of the design. The machines
may be arranged with one or more horizontal plates so as to execute one or
more engraved parts at a time. Motion may be imparted to the carriers either
by variable wheel gearing and endless screws or by screws of varying pitch.

page_text: Our Invention consists in an improved mechanical process of electro
engraving and apparatus for the same, consisting of two or more plates having
simultaneous rotary motion and imparting motion to two carriers, one furnished
with one or more tracers, and the other with one or more diamonds or gravers;.
these two parts, as also the carriers, have each a transverse motion, the action
of the graver being regulated by that of the tracer by means of an electric.
current and electro-magnet. This apparatus may be applied for the repro-
duction of engraved designs, whether sunk or in relief, on any scale desired...
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Pierre Elie Gaiffe and Amédée Arthur Lalance in the Great
Seal Patent Office on the 2nd August 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, PIERRE
ELIE GAIFFE and AMEDEE ARTHUR LALANCE, of 29, Boulevart St. Martin,
Paris, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighth day of February, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said Pierre Elie Gaiffe and Amédée Arthur Lalance, Her special licence that
we, the said Pierre Elie Gaiffe and Amédée Arthur. Lalance, our executors,
administrators, and assigns, or such others as we, the said Pierre Elie Gaiffe
and Amédée Arthur Lalance, our executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might make,
use, exercise, and vend, within the United Kingdom of Great Britain and Ire-
land, the Channel Islands, and Isle of Man, an Invention for "A MECHANICAL
PROCESS OF ELECTRO ENGRAVING BY MEANS OF AN ELECTRO-MAGNETIC ENGRAVING
MACHINE," upon the condition (amongst others) that we, the said Pierre Elie
Gaiffe & Amédée Arthur Lalance, our executors or administrators, by an in-
strument in writing under our, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be filed
in the Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that we, the said Pierre Elie Gaiffe and Amédée
Arthur Lalance, do hereby declare the nature of our said Invention, and in

page_text: what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, that is to say :-
Our Invention refers to a new machine for reproducing from any drawings,
either relievo or intaglio, engravings, and with any desired reductions.
We have represented in the accompanying Drawings our engraving.
machine.
:
Figure 1 shows in vertical elevation a front view thereof, Figure 2 is a
plan of the same, Figure 8 shows likewise in vertical elevation an end view
of the same, Figure 4 shows in detail the graver, Figure 5 shows the style.
graver.
The said machine consists of two plates or boards, the larger one D
carrying the original drawing to be reproduced, which drawing is formed with
insulating substances on a metallic ground, and the smaller one C carries the
block, plate, or stone intended to receive the engraving; these two plates or
boards are provided with a slide operated by a mechanism which permits of
their motion being increased or diminished; they carry the pattern, one the
platina style, and the other the engraving tool or the
Motion may be
imparted to the machine by any power, which motion starting from a shaft z
is transmitted by a bevelled wheel to another shaft y, by which are operated
the shafts x, a¹, upon which the plates or boards C, D, are placed by means
of two endless screws; a third endless screw v keyed to the shaft end actuates
another arbor u, whereby is worked the gear a, which is made variable to
conform with the variable reductions, and actuates besides the shaft t on the
top, which shaft transmits the movement of the pattern slide n by the aid of
the screw r, while the block or plate slide o is operated by the screw q. The
pattern slide is provided with a pin B which we denominate the style, and
which is made to travel on the drawing, describing a very close spiral from
the centre; the other slide carries a graver A, which being actuated by an
electro-magnet is through an electric wire set in connection with the pattern
style, thus either raising or lowering the frame according as the current is
broken by the style passing over the metal or on the insulating substance
which the pattern is formed with.
In Figure 4, representing the electro-magnet, A is the terminal com-
municating through an electric wire with the style; B is the terminal com-
municating with one of the battery poles; C, electro-magnets; D, armature;"
E, moveable counterweight; F, graver. In Figure 5, A¹ is the terminal
communicating with the terminal A of the graver; B, moveable counter-
weight; C, platina wire or style. The boards baving a circular synchronous
movement every time the style passes on to a metallic part of the pattern
drawing the current will run through the electro-magnet C, and the

page_text: graver F will be raised; whenever on the contrary the style passes on to an
insulated portion the current will not pass through the electro-maguet, but
the graver will trace an intaglio of any desired depth. By causing the
electric wire to form two separate circuits, the one passing through the style,
the other through a metallic pin relievo engravings may be obtained or pro-
duced similar to wood engravings; the said pin will then remove the varnish
every time the graver passes on the metallic parts or off the drawing. The
transverse movement of the slides n, o, supporting the style and the graver, is
imparted, as herein-before described, by a set of variable gearing according to
the reductions which are to be obtained. These machines are horizontal
with one or more plates or boards so as to admit of one or more plates being
engraved at one time. As to the slides they may be operated either by
variable screw operating wheels, or by variable screws differently threaded.
Having thus described the nature of our Invention, and the manner in
which the same may be carried into effect, we wish it to be understood that
what we claim is,-.
The electro-magnetic engraving machine, together with the electro process,
as described, the most conspicuous feature of which is contriving two or more
plates or boards with a same circular synchronous movement carrying along
with them two slides, the one provided with one or more styles, the other with
one or more gravers, which two organs are animated with two transverse
movements in connection with each other, and the graver being made to follow
the style through the medium of an electric.current and an electro-magnet.
And we most especially reserve the sole exclusive right to use and apply
our machine for reproducing relievo and intaglio engraving from drawings of
any sort, and with all required reductions.
In witness whereof, we, the said Pierre Elie Gaiffe and Amédée Arthur
Lalance, have hereunto set our hands and seals, this Twenty-ninth day
of July, in the year of our Lord One thousand eight hundred and
sixty-seven.
P. E. GAIFFE.
(L.B.)
A. A. LALANCE. (LS.)
P. E. GAIFFE.
(L.B.)
A. A. LALANCE. (L.B.)