IMPROVEMENTS IN MACHINERY, OR APPARATUS FOR MARKING, ETCHING, OR ENGRAVING ON CYLINDRICAL AND OTHER SURFACES
Year: 1866

page_text: PROVISIONAL SPECIFICATION left by Henry Garside at the Office of
the Commissioners of Patents, with his Petition, on the 6th October
1866.
I, HENRY GARSIDE, of Coupland Street, in the City of Manchester, and
County of Lancaster, Engineer and Machinist, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN MACHINERY, OR APPARATUS FOR
MARKING, ETCHING, OR ENGRAVING ON CYLINDRICAL AND OTHER SURFACES," to be
as follows:-
Firstly, my improvements relate to machines of that class described under
the second head of the Specification of the Patent granted to me and dated
the Sixteenth August, in the year of our Lord One thousand eight hundred
and sixty-two, and numbered 2307, where the roller or surface to be operated
upon receives motion alone, the instruments performing the etching or engraving
operation being stationary, except that they are capable of being moved to and
from the surface to be acted upon.
The object of my improvements is to dispense in certain cases with the
operation for enlarging the design to be etched or engraved upon the roller or
other surface, which operation is necessary in the machines hitherto used where
a pentographic arrangement is employed in tracing from a design plate, and my

page_text: Invention consists in detaching or dispensing with the pentographic mechanism
and joining an arm directly with the table or frame carrying and giving move-
ment to the roller or other surface to be etched or engraved, the said arm
being adjustable, and holding the tracer in its end.
Secondly, my Invention relates to machines herein-before referred to as
described under the second head of the Specification of my aforesaid Patent,
the object of which is to modify the mechanism of the said machine so that
while the movements given to the table acting at a right angle to the axis of
the roller or other surface are direct, those movements which are given in the
direction of the axis of the roller may be reversed when required by the
design to be engraved or etched, and it consists in employing two tables or
frames for the movement in the direction of the axis of the roller or surface
to be etched or engraved, arranged side by side or one over the other, and
when the movements are to be reversed the pentographic mechanism or the
arm used according to the first part of my present Invention is connected
with the lower or supplementary table or frame, and the movements of this
table or frame are reversed and transmitted to the other table or frame by
means of pulleys and bands, or by levers, the axis of the pulleys or the
fulcrum of the levers being fixed upon the lowest table or frame moving at a
right angle to the axis of the roller, or when the two tables or frames are one
over the other, so that the supplementary table or frame is between the lowest
and the highest table or frame, then the movements are reversed by placing
"centres" in the rollers supporting the upper table, and thus by connecting
the parts having the centres with the lowest frame the axes of the supporting
rollers will be kept stationary, while they are allowed to rotate freely by the
movements of the tables.
Thirdly, my improvements relate to a machine for etching or engraving
which is intended more particularly to operate upon rollers of large diameter,
and the peculiarities of which this part of my Invention consists will be most
readily understood by supposing a machine to be made to actuate a roller of
very large diameter, but instead of the roller a skeleton cylinder or frame
with rings at the ends only is used, and instead of the etching or engraving
instruments being placed upon a fixed bar they are arranged upon the frame
with ring ends, so as to receive the rotary and end movements imparted to it
by the tables or frames. The roller to be operated upon is arranged so that
its axis will coincide or nearly so with that of the frame with the ring ends,
and it is stationary under the operation of the etching or engraving instruments,
but is capable of adjustments in a circular direction and in the direction of its

page_text: axis. Arrangements are made for applying the etching or engraving instruments
to the work or withdrawing them therefrom by communications through or in
connection with the axis of the frame with ring ends. By this arrangement
rollers of great weight may be operated upon, as there weight and the inertia
and friction arising therefrom does not interfere with the operation as it would
do in machines hitherto in use.