IMPROVEMENTS IN MACHINERY FOR ETCHING AND ENGRAVING CYLINDRICAL AND OTHER SURFACES
Year: 1873

page_text: LETTERS PATENT to Wilfrid Clegg, of Hulme, in the City of Man-
chester, Machinist, for the Invention of "IMPROVEMENTS IN MACHINERY
FOR ETCHING AND ENGRAVING CYLINDRICAL AND OTHER SURFACES.”
PROVISIONAL SPECIFICATION left by the said Wilfrid Clegg at the
Office of the Commissioners of Patents, with his Petition, on the
1st May 1873.
I, WILFRID CLEGG, of Hulme, in the City of Manchester, Machinist,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN MACHINERY FOR ETCHING AND ENGRAVING CYLINDRICAL AND OTHER SURFACES,'
to be as follows:-
My Invention is applicable to the pentagraph machines usually
employed for etching and engraving rollers or other surfaces.
In order to
The first part of my Invention consists of a lever for punching pins or
figures on the roller or other surface to be engraved.
accomplish this I fasten a carriage on to the tool bar. Inside the

page_text: carriage a pillar is made to rise or fall, according to the size of the
roller. On the top of the pillar the punching lever is made to work in
centres; the strength of the blow is regulated by means of a sliding
weight by a spring, or by the height of the drop. The punch lever is
raised by a rod connected to levers worked from the lifting bar, and is {
held
up by a catch fitting into it. When the lifting bar is made to fall
the rod that raises the lever drops, and at the same time draws the catch
out of the notch in the lever, and allows it to fall.
The second part of my Invention consists of an improved arrangement
of machinery for engraving one or more objects in the circumference of
the roller, and to work right and left-hand objects at one operation. By
this arrangement I am enabled to engrave all the ordinary sizes of hand-
kerchief rollers, and I avoid the necessity of lifting the levers off the
machine to take out the roller. On the top of each carriage there are
two small carriages made to slide in or out according to the size of the
roller to be engraved. On these two carriages are fixed two segments,
made to work on a joint, and secured by a screw. In each segment
there is a slot to allow the diamond levers to be fixed in the required
places. Attached to these are two other segments, which rise and fall.
with the lifting bars, and to which are fixed carriers to lift the diamond
lovers off the rollers. When the roller is to be taken out of the machine
the screws are taken out of the segments, and the segments with the
levers fall back clear of the roller.
The third part of my Invention consists of an improved apparatus to
be employed in combination with the ordinary revolving cutter used for
drilling or cutting the design on the surface to be engraved. The object
of my Invention is to produce a uniform depth of line or pin on the
roller. To obtain this I employ a stop motion working on a joint, one
end of which rests against the roller, and is allowed to rise and fall with
any inequality on the surface. On the other end of the stop there is a
disc fitted on a screw, against which the holder of the revolving cutter is
made to press, thus preventing the cutter going deeper in one place than
another; the depth of the line or pin is obtained by screwing the disc
nearer to or further from the roller.
The fourth part of my Invention is a method of enlarging or reducing
the pattern on the surface to be engraved without the use of inclined
planes, levers, or pulleys. To obtain this I use a disc of brass or other
suitable material, which is made to revolve as the tracer passes over the

page_text: pattern plate. On the top of the disc there is a smaller disc, with a
milled edge, which is made to revolve by the large disc. When the
pattern to be engraved is required to be less than the design over which
the tracer is passed, the small disc is made to work near the centre of
the large disc, and when the pattern is required larger it is made to work
nearer the edge. To get a reverse object the small disc is made to work
on the opposite side of the centre of the large disc.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Wilfrid Olegg in the Great Scal Patent Office on
the 25th October 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILFRID
CLEGG, of Hulme, in the City of Manchester, Machinist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of May, in the year of our
Lord One thousand eight hundred and seventy-three, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Wilfrid Clegg, Her special licence that I,
the said Wilfrid Clegg, my executors, administrators, and assigns, or
such others as I, the said Wilfrid Olegg, 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 for " IMPROVEMENTS IN MACHINERY FOR
ETCHING AND ENGRAVING CYLINDRICAL AND OTHER SURFACES," upon the
condition (amongst others) that I, the said Wilfrid Clegg, my executors
or administrators, by an instrument in writing under my, 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 immediately after the
date of the said Letters Patent.
NOW KNOW YE, that I, the said Wilfrid Clegg, do hereby declare
the nature of my said Invention, and in what manner the same is to be

page_text: which is made to rise or fall in the stand g according to the size of the
cylinder to be operated upon, and it is secured by means of the screw g¹.
The stand 9 is fastened on to the ordinary tool bar h in the same manner
as an ordinary diamond lever. In Fig. 1 the levers i and the con-
necting links, and the screw *, are raised by the ordinary treadle or
lifting bar k; the weight is to bring the levers down when the treadlo
is depressed.
The mode of operation is as follows:- -When the tracer point has been
placed in the required position the treadle is depressed, the weight *.
brings down to the levers i and the screw **; at the same time the head
of the screw brings down the bracket e¹ until the point of the screw e
clears the catch 6, when the lever 6¹ falls. The head of the screw i³ is
so far from the lever b¹ that it allows the punch 6 to fall on the cylinder a.
When the operator removes his foot from the treadle the bar k rises to
its original position, at the same time raising the levers i and the screw i³,
the head of which screw raises the lever 6¹ until the catch 62 is clear of
the point of the screw e, when the spring e³ forces the screw e into its
original position.
Fig. 2 represents another arrangement of machinery for raising the
levers 6. The stand m is fastened on the stay rail n of the machine by
the bolt o inside the stand m; the pillar p is made to rise or fall, as
required, and it is secured by the screw m¹; on the top of the pillar p
the lever q is made to work on a joint q¹; one end of the lever q is
connected to the ordinary treadle by means of the connecting rod r,
which is jointed at 7. On the other end of the lever q there is a rod or
lifting bar s, which extends the full length of the cylinder, and it is
supported at its other end in the same manner; when the treadle is
depressed the rod r is raised, and as it is connected to the lever q one
end of it will rise, while the other end will descend; the rod or lifting.
bar & being fastened to the lever q will descend also, and in its descent
it draws down the end of the bracket e¹ until the screw e is clear of the
catch &, as in Fig. 1. When the operator's foot is removed from the
treadle the rod 7 descends and the bar & rises and lifts the lever b' at
the same time, as in Fig. 1. The dotted lines in Fig. 2 shew tho
position of the various parts when the punch 6 has completed its work.
8
Figs. 3 and 4 represent the second part of my Invention, being an
improved arrangement of machinery for engraving one or more objects.
•

page_text: on the circumference of the cylinder at one operation; a is the cylinder
to be engraved; b are the tools mounted in the levers b¹, and jointed at
6³, and adjusted by the weights 63; the levers b' are made to slide through
the swivel c, which works on centres c¹, and is carried by the carriago d;.
the carriage is supported by the bracket e, which is made to slide up or
down the segment f, and is secured in the required position by the bolt f¹
passing through the slot f; the bracket g is for lifting the tool off the
cylinder, and it is secured by the screw g¹ to the segment ; the
segment is jointed at fs by the bolt f'; the segment h is made to rise
and fall on the segment f, and it is worked from the lifting bars i by 1
means of the cross bar k and the swivel l; the carriage m is screwed on
to the tool bar n; the opposite end is supported on the other tool bar o
by the pulley p; on the carriage mare fixed two other carriages q, which
slide in or out according to the size of the cylinder to be operated upon,
and they are secured in the required positions by the screws q'; the
segments fare jointed on the carriages q. Number 1 shwes the position of
the segments with the levers when the cylinder is being taken out of the
machine, and No. 2 shews the position where the cylinder is being
operated upon.
The mode of operation is as follows:-The carriage m, being secured
to the tool bar n, and supported by the pulley p on the tool bar o, will
allow the tool bar n to move in one direction, while the bar o moves in
an opposite direction; I therefore secure one carriage to the bar n, and
the other to the bar o, and by this means get a right and left-hand
movement at one operation; when the treadle is depressed the bars i and
k and the swivels 2 descend; the segments h with the brackets g will
also descend and allow the tools 6 to fall on to the cylinder; when the
foot of the operator is removed from the treadle the bars i and k will
rise, at the same time pressing the swivels against the segments h,
which will be forced upwards, carrying along with them the brackets g,
one end of which lifts the tools off the cylinder.
On Sheet 2, Fig. 5 represents the machinery forming the third part of
my Invention. a is the cylinder to be operated upon; b is the revolving
cutter, mounted in the spindle c, and revolving in the pillar & by means
of a band or strap working on the pulley c²; the pillar & is made to rise
or fall in the carriage e, and is secured by the screw e¹; the carriage e is
fastened on the tool barfin the ordinary way; the levers 9 and h are

page_text: jointed at g and h¹, and connected by a rod i; the lever h is weighted
at one end by the weight k, and supported on the treadle or lifting bar 7.
by the screw h²; the stop m is jointed at m'; the screw n is fitted into
the stop m, and carries the disc o, which is prevented from turning by
the catch p fitting into a notch in the disc o. The necessary motions are
given to the cylinder a and tool barfin the usual manner; when the
baris depressed the end of the lever his brought down by means of the
weight ; the other end of the lever / forces the rod i upwards, which
rod being connected to the cranked lever g forces the screw g³ against the
end of the spindle c, and consequently forces the cutter 6 into the
cylinder a until the collar c' is forced against the disc o, and the upper
part of the stop m against the cylinder a. By this means a uniform
depth of line or pin is secured. When the bar / rises the pressure will
be removed from the spindle c, and the spring & acting against the
collar o³ will bring the cutter 6 to its original position. The depth of
the pin or line is regulated by screwing the disc o towards or from the
stop m.
The fourth part of my Invention is illustrated by Fig. 6 on Sheet 2,
and Figs. 7 and 8 on Sheet 3. a is the cylinder to be operated upon,
supported by the two headstocks b and c; the spindle b¹ in the head-
stock 6 is screwed and carries a disc 68, which is secured in the required
position by the two nuts 63 and 6*; the disc d, which is made of brass or
other suitable material, is made to revolve in the headstock on the
spindle d', and is made to press against the disc 6ª by the spring d³, or
by a weighted lever; on the bottom of the spindle d' the pulley d³ is
fixed, which is worked by the bands e being fastened to the rim of the
pulley, and secured at each end by the brackets e¹ and e²; the head-
stocks b and c are supported by the bed f, fixed on the rails f¹, working
on the flanged rollers f*, which rollers ride on the rails fs; the brackets g
support the rail h, and on this rail a carriage h¹, with the tracer h³, is
made to slide transversely by means of the V shaped pulleys 1, 2, and 3.
On the other end of the bed ƒ another headstock i is fixed' at right
angles with the headstock 6, and it is furnished with a spindle,
disc ³, with two nuts and i, a disc j, a spindle, a spring ³, and
pulley, as in the headstock b. To the end of the spindle i¹³ a pulley k
is attached, over which the band k¹ works, and which band' is carried
over the pulleys k³, and fastened at each end by the brackets ³ on the
tool bar 7. The tool bar is made to work on the flanged rollers A, and

page_text: shewn and described in reference to Figs. 6, 7, and 8, for enlarging or
reducing the pattern to be engraved.
In witness whereof, I, the said Wilfrid Clegg, have hereto set my
hand and seal, this Twenty-fourth day of October, One thousand
.
cight hundred and seventy-three.