IMPROVEMENTS IN MACHINERY OR APPARATUS FOR ENGRAVING METALLIC CYLINDERS OR ROLLERS BREAKER BAD DINING CAT AND ONED SUBSTANCre
Year: 1857

page_text: LETTERS PATENT to William Rigby, of Salford, near Manchester, in the
County of Lancaster, Engraver, for the Invention of "IMPROVEMENTS IN
MACHINERY OR APPARATUS FOR ENGRAVING METALLIC CYLINDERS OR ROLLERS
BREAKER
BAD DINING CAT AND ONED SUBSTANCre"
го
Sealed the 10th March 1857, and dated the 1st January 1857.
PROVISIONAL SPECIFICATION left by the said William Rigby at the
Office of the Commissioners of Patents, with his Petition, on the 1st.
January 1857.
I, WILLIAM RIGBY, of Salford, near Manchester, in the County of Lancaster,"
Engraver, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN MACHINERY OR APPARATUS FOR ENGRAVING METALLIC CYLINDERS OR
ROLLERS EMPLOYED FOR PRINTING CALICO AND OTHER SUBSTANCES," to be as
follows:-
The nature of this Invention, which consists of further improvements on a
Patent granted to me, and dated the Seventh day of April, in the year of our
Lord One thousand eight hundred and fifty-four, in the Specification of which
I shew only one carriage and tracer sliding laterally upon a rail or framework
having free play within the arc, &c. But I now find by experience that I
can use advantageously two of the said carriages at the same time, and thus
produce a double action of the machine, and perform double the amount of
work in a given time. The construction and arrangement of this machine is

page_text: fully described in the Specification of the Patent above alluded to; it is there-
fore unnecessary to give further details of it in this Provisional Specification,
as 1 only intend to claim in this Patent two, of the said carriages with the
necessary apparatus for working the same, instead of one, as above stated.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Rigby in the Great Seal Patent Office on the
30th June 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
RIGBY, of Salford, near Manchester, in the County of Lancaster, Engraver,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Royal
Letters Patent, bearing date the First day of January, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twentieth year of Her
reign, did, for Ierself, Her heirs and successors, give and grant unto me, the
said William Rigby, Her special licence that I, the said William Rigby,
my executors, administrators, and assigns, or such others as I, the said
William Rigby, my executors, administrators, and assigns, should at any
time agree with, and no others, from time to time and at all times there-
after 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 "IMPROVE-
MENTS IN MACHINERY OR APPARATUS FOR ENGRAVING METALLIC CYLINDERS OR
ROLLERS EMPLOYED FOR PRINTING CALICO AND OTHER SUBSTANCES," upon the
condition (amongst others) that I, the said William Rigby, by an instrument
in writing under my hand and seal, should particularly describe and ascer-
tain 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 William Rigby, do hereby declare
the nature of my said Invention, and in what manner the same is to bo
performed, to be particularly described and ascertained in and by the following
statement (that is to say) :-
This. Invention consists of improvements on a Patent granted. to me, dated
the 7th day of April 1854, in the Specification of which I shew only one line
of tools, by which it is impossible to machine all the repeats of a pattern- at

page_text: one operation unless such repeats occur in one straight line, but I now find
it practicable to use more than one line of tools on the same machine, and
my present Invention relates to an improved construction of the tool carriage
for effecting that object; and also the use of more tool bars than one, an
arrangement which both facilitates and extends the application of more than
one row of tools, and thus produce a greater amount of work in a given time
than can be accomplished by the machine as specified in my former Patent
above alluded to..
The manner of carrying my said improvements into practical effect will
be clearly understood by reference to the accompanying Sheet of Drawings,
and the letters of reference thereon; in which Fig. I is a transverse sectional
élevation of an engraving machine shewing my improvements; Fig. 2, a front
elevation, with the table or bed in section, thereby more plainly shewing the
tracer.
Fig. 3 represents a mode of giving a simultaneous reverse action to the two
series of tools and bars.
Fig. 4 an arrangement of tool holders adapted for employing two rows of
tools upon one bar; Fig. 5 is a modification of the same.
Fig. 6 represents a shifting carriage and swivel bar for the purpose of
obtaining greater command over the positions of the tools; and Fig. 7 is a
view of the same in another position.
In Figs. 1 and 2, a represents the cylinder to be operated upon; and 6, the
bed or table for the reception of the enlarged pattern or original device; c, the
tracer, which is made to traverse in the direction of the arc of the bed or table,
and by means of its connection with the carriage h; the rail d, and the connect-
ing arms e, e, communicates part of a revolution to the bar or axis f, and
thence to the cylinder through the dies g, g, on which the cylinder rests. The
cylinder being thus moved in a rotary direction, will receive from the tools in
contact with it diminished copies of the transverse lines which may have been
gone over by the tracer on the enlarged pattern or device. The tracer c being
connected with the carriage h which travels along the rail d, will, in passing
over a line running longitudinally with the machine, communicate a partial
revolution to the wheel by means of the bands of steel j, j, similar to watch
springs, which pass under and over the small wheels k, k, and are passed round
and secured to the large wheel 1, which is mounted on the vertical shaft m;
carrying at its upper end the small drum m, round which passes the steel
band n, secured at each end to the pieces o, o. These pieces are secured by
bolts or screws to the sliding frames p, to which the upper tool bar or bars
which support the graving, drilling, or etching tools r, r, r, are fixed. Thus

page_text: any motion of the large wheel 7 will be imparted to the drum m³, and by it
through the steel band n to the sliding frames p and the tool bars q, and
consequently to the tools r, thereby transferring to the cylinder diminished
copies of any lines in a lateral direction that may be gone over by the tracer.
It will be evident that the result of the simultaneous action or compounding
of the two motions, by passing the tracer over any diagonal or curved line,
will be the production of a diminished copy of such diagonal or curved line by
each of the tools. s is a treadle with a vertical link and appropriate leverage,
by which the tools may be brought in contact with the cylinder when required;
t, t, are counterbalance weights for the connecting arms e, e, lower rail d, &c.;
2 and represent a worm and wheel for the purpose of giving the roller an
extra partial revolution when it is required to engrave upon a different portion
of the circumference of the cylinder; and to effect a similar purpose in
the longitudinal direction the tool bar may be made to shift in its sliding
frame with an adjusting screw attached to it, by means of which any degree
of exactitude in the setting of the tools may be obtained.
In the machine, as shewn in the accompanying Drawings, the design executed
on the cylinder would bear the same proportion in size to the enlarged pattern
on the bed or table that the small drum m¹ bears to the large wheel I, and the
radius of the discs g, g, to the radius of the circular bed; but by the adaptation
of wheels and discs of different diameters, any desired proportion between the
pattern engraved and the enlarged pattern may be adopted.
It will be observed that one of the motions is communicated to the roller
and the other to the tools, which arrangement I prefer to giving both motions
to the roller or both to the tools, but it is evident that either of the said ways
may be applied if desired.
In Fig. 3, representing a mode of giving an alternate reverse action to the
tools and bars, a¹ are the bars, to one of which a longitudinal to-and-fro motion
is given, and a reverse motion given at the same time to the other bar by
means of the links or rods b', connected to the beam or lever c', working on the
pin or fulcrum d' attached to the framing e'. This arrangement of the machine
is suitable for turnover patterns.
In Figs. 4 and 5 the tool holders are adapted for employing two or more
rows of tools, the members of the two rows being placed in alternate holders,
or otherwise, according to the pattern. It is evident that by slight modi-
fications in the form of the tool holders the tools may be made to occupy any
position on the surface of the cylinder, thus affording great facility for placing
the tools and making them applicable for step patterns or other suitable
sketches.

page_text: Figs. 4 and 5 shew two such modifications, in which f' is the copper roller;
g', the line of fulcrums or centres upon which the tool holders ' and ' vibrate,
the said tool holders with their tools being lifted off by the cam l' and advanced
to their work by the weights m', which can be adjusted with any required
nicety.
In Figs. 6 and 7 is shewn another arrangement of tools with swivel bars,
the swivel bars being shewn at p', and placed and held in the desired position
by the screws q. To the bar is attached the carriage, to one end of which
is connected the tool holder s', in which is a projection t', acted upon by a beam
or lever u¹ working on a fulcrum in the carriage ¹. The tool is lifted off the
roller v by means of the cam w¹, and returned to its work by means of a spring
or india-rubber band a attached to the slide r. It will be perceived that,
independently of the slot or slide in the tool holder, I obtain great change of
position by simply shifting the carriages longitudinally.
Having thus fully described the nature of my said Invention, and the manner
in which the same is to be performed, I desire it to be distinctly understood
that I now claim as my Invention the improved arrangement and construction
of the machine and of the tool carriage, so as to use more than one line of
tools in the engraving machine, as patented by me the 7th day of April 1854,
and also so as that the two sets of tools may be made to work in opposite or
reverse directions if required.
In witness whereof, I, the said William Rigby, have hereunto set my
hand and scal, this Twenty-seventh day of June, in the year of our
Lord One thousand eight hundred and fifty-seven.
Signed, sealed, and delivered by the within-
named William Rigby, in the presence of
WILLIAM RIGBY. (L.S.)
E. J. HUGHES, Patent Agent,
Manchester.