A NEW AND USEFUL MECHANISM OR APPARATUS FOR SUPPORTING AND ADJUSTING A GRAVER OF A MACHINE FOR ENGRAVING THE SURFACE OF A CALICO PRINTER'S ROLLER PREPARATORY TO THE SAME BEING ETCHED
Year: 1858

page_text: LETTERS PATENT to John Hope, of the State of Rhode Island, of the
United States of America, for the Invention of "A NEW AND USEFUL
MECHANISM OR APPARATUS FOR SUPPORTING AND ADJUSTING A GRAVER OF A
MACHINE FOR ENGRAVING THE SURFACE OF A CALICO PRINTER'S ROLLER
PREPARATORY TO THE SAME BEING ETCHED."
Sealed the 18th January 1859, and dated the 26th July 1858.
PROVISIONAL SPECIFICATION left by the said John Hope at the
Office of the Commissioners of Patents, with his Petition, on the
26th July 1858.
I, JOHN HOPE, of the State of Rhode Island, of the United States of
America, do hereby declare the nature of the said Invention of "A NEW AND
USEFUL MECHANISM OR APPARATUS FOR SUPPORTING AND ADJUSTING A GRAVER OF A
MACHINE FOR ENGRAVING THE SURFACE OF A CALICO PRINTER'S ROLLER PREPARATORY
TO THE SAME BEING ETCHED," and the manner in which the same is to be per-
formed, are fully described and represented in the following Specification and
the accompanying Drawings, of which Figure 1 is a top view of it; Figures 2
and 3 opposite side elevations of it; Figure 4, a vertical, central, and
longitudinal section of it; Figure 5, a vertical and transverse section of it.
The mechanism constituting my said Invention is intended to be applied to
a machine of the kind described in the Specification of the United States
Patent, numbered 13,462, granted to me and Thomas Hope on the 21st day
of August 1855. In its application to such machine my Invention is to take

page_text: the place of the usual graver lever, and is to be fastened to the carriage
employed to support such graver lever. It is also to extend from the said
carriage over and partly around the roller to be engraved, the position of the
said roller with respect to the apparatus being exhibited by dotted lines at A,
Figure 2.
In carrying out my Invention I employ a curved slotted arm, stand, or
bar B, which, by means of a clamp C (applied to it, as shown in the Drawings),
is to be affixed to the movable carriage, by which the graver levers are usually
sustained in the engraving machines, such carriage being marked C in the
Drawings of said Patent, numbered 13,462. This bar B is constructed with
a slot a formed longitudinally in it, as shown in Figures 1 and 4, and it
supports a tracer or graver carriage D, which is constructed in two parts, b, c.
The first part b rests and slides on the top of the bar B, and has a clamp d, by
which it may be fastened in any position on the bar; the part c is bifurcated,
and extends upward through the slot a and the part b, and is secured to the
latter by means of a clamp screw, the whole being formed and arranged as
shown in the Drawings. By reason of the peculiar construction of the part c,
and its application to the part b, the said part c may be adjusted, or in other
words, moved further from or nearer to the surface of the cylinder to be
engraved. In the opening of the forked part is a graver lever E, which turns
vertically on pivots or points, arranged as shown at f, f, in Figure 5. This
graver lever or carrier is balanced by a weight g applied to it, as shown in
Figures 1, 2, and 4, the graver being fastened in the said lever in the position
as indicated by dotted lines at h, in Figures 3 and 4. An arm F turns vertically
on the shaft i of the graver lever, and has a small set screw K, by which it may
be clamped to the shaft. This arm supports a weight G, which is con-
structed in two parts, l, m, one of which, viz., the part m, is separate from the
other, or the part 1, and rests upon it, and is supported in place by a projection
or tenon n, from the part 7 being made to enter a corresponding mortise o
formed in the said part m, the same as shown in Figure 6, which is a vertical
section of the two parts. Another arm H is placed on and made to project
from the shaft i, it being applied to the shaft so as to be capable of being
turned vertically therein by a set screw. A rod I extends and slides freely
through the arm H, and is jointed at its rear end to a bent lever S, which
turns on a fulcrum p, and towards and away from a stop projecting from the
bar B, as. shown in Figures 1 and 2. Furthermore, the rod I carries an
adjustable stop or slider L, which slides longitudinally on the rod, and has a
clamp screws, by which it may be fastened thereto. By depressing the longer
arm of the lever S the stop L will be moved against the arm H, so as to cause

page_text: such arm to move and turn the shaft of the graver lever in a manner so as to
raise the graver off the surface of the roller on which it may be in action.
In calico printing rolling engraving machines as usually constructed, the
gravers when at work commonly rest on the extreme upper surface of the
cylinder on which they may be operating, it being customary to engrave but,
one row of devices at one and the same time on the cylinder, such row;
extending longitudinally of it. By means of my improved apparatus, gravers
or tracers may be made to operate on any part of the upper half of the surface,
of the cylinder, as the bar B and carriage D of each graver lever enables its
graver to be adjusted to any position on the upper surface of the cylinder,
and whatever may be the diameter of the cylinder. Thus, in engraving
a copper cylinder with my apparatus, it will not be necessary to arrange
all the graver points on the extreme top part of the upper surface of
the cylinder, as they may be placed in different positions or elevations on the
upper half of the cylindric surface; and in consequence thereof, several rows
or figures may be engraved at one and the same time, and thus the work of
engraving a cylinder may be greatly facilitated in comparison to what can be
done in the ordinary manner. I would observe that in whatever position the
graver may be arranged on the upper surface or half of the cylinder or roller,
the arm should be adjusted horizontally, for when all the arms of the
different gravers are so arranged, each graver in consequence of the lever
being balanced will be pressed on the cylinder with an equal force, provided
each weight G is alike, and has its center of gravity the same distance from
the axis of the shaft of its graver lever. The object of making the weight G
of the graver in two parts, l, m, is to furnish a convenient means of adjusting
a graver to engraving either outlines or ground lines of the figure. In the
process of engraving the ground lines, the movable part m of the weight is
placed upon
the stationary part 1; but while engraving the outlines which
requires the graver to cut or simply mark in the varnish composition on the
printing roller, the movable part should be off the part 7. At nearly every
movement of the carriage D on the bar B the adjustable stop L will require
some new adjustment, in order to enable the mechanism by which the gravers
are raised off the cylinder to correctly perform its office.
I claim the curved arm or bar B and the graver carriage D, as combined
together, and with the graver lever E, and made to operate therewith sub-
stantially as specified.
I also claim the adjustable weighted arm F, in combination with the
balanced tracer arm or graver E.
I also claim constructing the tracer carriage D in two parts, b, c, sub-

page_text: stantially as described, in order that the tracer or graver may be adjusted in a
vertical direction to cylinders or rollers of different sizes.
I also claim making the arm H and the stop L adjustable on their shaft
and rod, as described, in order to bring them into proper positions to cause the
elevation of the graver under any situation of it on the surface of the cylinder,
and when-the-lever-s-is-moved backward.
"
I also claim making the weight G in two parts, l, m, for the purpose-
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Hope in the Great Seal Patent Office on the
20th January 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HOPE, of the State of Rhode Island, of the United States of America, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the 26th day of July, A.D. 1858, in the twenty-second
year of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said John Hope, Her special license that I, the said John
Hope, my executors, administrators, and assigns, or such others as I, the said
John Hope, my 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 Ireland,
the Channel Islands, and Isle of Man, an Invention of "A NEW AND USEFUL
MECHANISM OR APPARATUS FOR SUPPORTING AND ADJUSTING A GRAVER OF A MACHINE
POR ENGRAVING THE SURFACE OF A CALICO PRINTER'S ROLLER PREPARATORY TO THE
SAME BEING ETCHED," upon the condition (amongst others) that I, the said
John Hope, by an instrument in writing under my hand and seal, 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 I, the said John Hope, do hereby declare the
nature of my said Invention, 'and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
Specification and the accompanying Drawings, of which Figure 1 is a top

page_text: view of it; Figures 2 and 3, opposite side elevations of it; Figure 4, a
vertical, central, and longitudinal section; and Figure 5, a vertical and
transverse section of it.
The mechanism constituting my said Invention is intended to be applied to
a machine of the kind described in the Specification of the United States
Patent, numbered 13,462, granted to me and Thomas Hope, on the 21st day
of August, A.D. 1855.
In its application to such machine my Invention is to take the place of the
usual graver lever, and is to be fastened to the carriage employed to support
such graver lever. It is also to extend from the said carriage over and partly
around the roller to be engraved, the position of the said roller with respect to
the apparatus being exhibited by dotted lines at A in Figure 2.
In carrying out my Invention I employ a curved slotted arm, stand, or
bar B, which, by means of a clamp C (applied to it as shown in the Drawings),
is to be affixed to the movable carriage by which the graver levers are
generally sustained in the engraving machines, such carriage being marked C
in the Drawings of said Patent numbered 13,462. This bar B is constructed
with a slot a formed longitudinally in it, as shown in Figures 1 and 4, and it
supports a tracer or graver carriage D, which is constructed in two parts b, c ;
the first part 6 rests and slides on the top of the bar B, and has a clamp & by
which it may be fastened in any position on the bar. The part c is bifurcated,
and extends upward through the slot a and the part b, and is secured to the
latter by means of a clamp screw e, the whole being formed and arranged as
shown in the Drawings. By reason of the peculiar construction of the part c
and its application to the part b, the said part c may be adjusted, or, in other
words, moved further from or nearer to the surface of the cylinder to be
engraved. In the opening of the forked part c is a graver lever E, which
'turns vertically on pivots or points, as shown at f, f, in Figure 5. This graver
lever or carrier is balanced by a weight g applied to it, as shown in Figures
1, 2, and 4, the graver being fastened in the said lever in the position as
indicated by dotted lines at h, in Figures 3 and 4. An arm F turns vertically
on the shaft i of the graver lever, and has a small set screw k, by which it
'may be clamped to the shaft; this arm supports a weight G, which is con-
structed in two parts l, m, one of which, viz., the part m, is separate from the
other or part 1, and rests upon it, and is supported in place by a projection or
'tenon n, from the part 1 being made to enter a corresponding mortice o formed
in the said part m, the same being as shown in Figure 6, which is a vertical
section of the two parts. Another arm H is placed on and made to project
from the shaft i, it being applied to the shaft so as to be capable of being

page_text: adjustable stop or slider L, which slides longitudinally on the rod and bas a
clamp screws, by which it may be fastened thereto. By depressing the
longer arm of the lever S the stop L will be moved against the arm H, so as
to cause such arm to move and turn the shaft of the graver lever in a manner
so as to raise the graver off the surface of the roller on which it may be in
action.
In calico printing roller engraving machines as usually constructed, the
gravers when at work commonly rest on the extreme upper surface of the
cylinder on which they may be operating, it being customary to engrave
but one row of devices at one and the same time on the cylinder, such row
extending longitudinally of it. By means of my improved apparatus gravers
or tracers may be made to operate on any part of the upper half of the surface
of the cylinder, as the bar B and carriage D of each graver lever enables its
lever to be adjusted to any position on the upper surface of the cylinder, and
whatever may be the diameter of the cylinder; thus, in engraving a copper
cylinder with my apparatus it will not be necessary to arrange all the graver
points on the extreme top part of the upper surface of the cylinder, as they
may be placed in different positions or elevations on the upper half of the
cylindric surface, and in consequence thereof several rows of figures may be
engraved at one and the same time, and thus the work of engraving a cylinder
may be greatly facilitated in comparison to what can be done in the ordinary
manner.
I would observe that in whatever position the graver may be arranged on
the upper surface or half of the cylinder or roller the arm F should be
adjusted horizontally, for when all the arms of the different gravers are so
arranged, each graver, in consequence of the lever being balanced, will
be pressed on the cylinder with an equal force, provided each weight G is
alike and has its center of gravity the same distance from the axis of the shaft
of its graver lever. The object of making the weight G of the graver in two
parts l, m, is to furnish a convenient means of adjusting a graver to engraving
either outlines or ground lines of a figure. In the process of engraving the
ground lines the movable part m of the weight is placed upon the stationary
part 1, but while engraving the outlines, which requires the graver to simply
cut or mark in varnish composition on the printing roller, the movable part
should be off the part 7.

page_text: At nearly every movement of the carriage D on the bar B the adjustable
stop L will require some new adjustment in order to enable the mechanism
by which the gravers are raised off the cylinder to correctly perform its
office.
I claim the curved arm or bar B and the graver carriage D as combined
together and with the graver lever E, and made to operate therewith, sub-
stantially as specified.
I also claim the adjustable weighted arm F in combination with the
balanced tracer arm or graver E.
I also claim constructing the tracer carriage D in two parts b, c, substan-
tially as described, in order that the tracer or graver may be adjusted in a
vertical direction to cylinders or rollers of different sizes.
I also claim making the arm H and the stop L adjustable on their shaft
and rod, as described, in order to bring them into proper positions to cause
the elevation of the graver under any situation of it on the surface of the
cylinder and when the lever S is moved backward.
I also claim making the weight G in two parts l, m, for the purpose
specified.
In testimony whereof, I have hereunto set my signature and seal, this
15th December 1858
JOHN HOPE. (L.S.)