IMPROVE- MENTS IN MACHINERY FOR ENGRAVING AND ETCHING ROLLERS AND OTHER SURFACES
Year: 1866

page_text: LETTERS PATENT to Robert. Leake, of the Strangeways Engraving Works,
Manchester, in the County of Lancaster, and Joseph Beckett, of the
same Place, Machine Superintendent, for the Invention of "IMPROVE-
MENTS IN MACHINERY FOR ENGRAVING AND ETCHING ROLLERS AND OTHER
SURFACES."
Sealed the 7th August 1866, and dated the 24th February 1866.
PROVISIONAL SPECIFICATION left by the said Robert Leake and
Joseph Beckett at the Office of the Commissioners of Patents, with
their Petition, on the 24th February 1866.
We, ROBERT LEAKE, of the Strangeways Engraving Works, Manchester,
in the County of Lancaster, and JOSEPH BECKETT, of the same Place, Machine
Superintendent, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MACHINERY FOR ENGRAVING AND ETCHING ROLLERS AND OTHER
SURFACES," to be as follows:-
Our Invention consists in an improved application of one or more additional
bars, supporting the diamond or tracing points to the pentagraph machines
hitherto employed for engraving rollers and other surfaces; these additional
bars and tracing points being supported either by standards or cross rails
attached or connected to the ordinary, diamond bars, and actuated by the

page_text: same mechanism as the ordinary diamond or tracing points, with the addition
of one or more bars connected to the treadle.
By this Invention a considerable saving in time is effected, as the design
is traced on a greater number of parts of the surface to be engraved at the
same time.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Robert Leake and Joseph Beckett in the Great Seal Patent
Office on the 23rd August 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ROBERT
LEAKE, of the Strangeways Engraving Works, Manchester, in the County of
Lancaster, and JOSEPH BECKETT, of the same Place, Machine Superintendent,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fourth day of February, in the year of our Lord
One thousand eight hundred and sixty-six, in the twenty ninth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said Robert Leake and Joseph Beckett, Her special license that we, the
said Robert Leake and Joseph Beckett, our executors, administrators, and
assigns, or such others as we, the said Robert Leake and Joseph Beckett, 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 Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN MACHINERY FOR EN-
GRAVING AND ETCHING ROLLERS AND OTHER SURFACES," upon the condition
(amongst others) that we, the said Robert Leake' and Joseph Beckett, our
executors or administrators, by an instrument in writing under our, or their,
or one of our or 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 we, the said Robert Leake and Joseph Beckett,
do hereby declare the nature of our said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement (that is to say) :-
-

page_text: Our Invention consists in an improved application of one or more additional
bars supporting the diamond or tracing points to the pentagraph machines
hitherto employed for engraving rollers and other surfaces, these additional
bars and tracing points being supported either by standards or cross rails
attached or connected to the ordinary diamond bars, and actuated by the
same mechanism as the ordinary diamond or tracing points, with the addition
of one or more bars connected to the treadle.
And in order that our Invention may be fully understood and readily
carried into operation we will proceed to describe the accompanying Sheet of
Drawings, reference being had to the figures and letters marked thereon.
Figure 1 represents the principal parts of a pentagraph machine of the
present construction, to which our improvements are applied; Figure 2 is
part of the same drawn on an enlarged scale.
'
a is the roller to be engraved; b, b, are the ordinary diamond or tracing
points connected to the usual slotted elbow levers c, c, hinged to the
brackets d, d, which are supported by the sliding or diamond bars e, e,
resting upon antifriction rollers e¹; f is the usual treadle, which is connected
to the slotted elbow levers c, c, by the link g, the levers h, i, and i, the two
latter being united by the horizontal bar j, which acts on the cross rails k, k,
and the screws 1, 1, which pass through slots in the horizontal arms of the
elbow levers c. All these parts and the others requisite to complete the
machine are made in the manner heretofore in use.
Our Invention consists in the application of one or more additional rows of
diamond or tracing points, supported and actuated in the manner herein-after
described and shewn in the Drawing, and acting on the surface of the roller a
at the same time as the usual tracing points b, b. In the Drawing annexed
we have shewn two additional rows of tracing points marked m and n; the
former are fixed in the slotted levers o, jointed to the brackets p, which are
supported on the cross rail q, and this cross rail is supported by the brackets r
fixed to one of the diamond bars e; the tracing points n are fixed in the
slotted levers s, which are jointed to the brackets t fixed to the other diamond
bar e. The tracing points m are lifted out of contact with the surface of the
roller a when required by the cross rail u connected to one of the cross rails k
by the brackets v, and the tracing points n are influenced in like manner by
screws corresponding to 7 passing through the levers w and the screws x, the
levers w being jointed to the brackets t. By this arrangement the action of
the treadle is communicated simultaneously to all the rows of the diamond
or tracing points.
Figure 3 represents a modification of our Invention; in this arrangement

page_text: we have shewn two cross rails q, one on each side of the roller a; these cross
rails are similar to the diamond bars é, e, and they are supported on anti-
friction rollers q¹ to reduce the friction.: The requisite lateral motion is
communicated to the cross rail g to traverse the additional row of diamond or
tracing points m over the surface of the roller a by means of the bracket z
fixed to the diamond bar e, and this bracket is connected to the cross rail.q
by the joint piece 2¹. The brackets p'and the slotted levers'o supporting the
tracing points m are made as usual, and the tracing points are raised and
lowered by the treadle f in the manner shewn and described in reference to
Figure 1. The object of placing a cross rail q at each side of the roller a is
to allow the levers of the additional row of tracing points to be adapted to
Feither side of the machine.
By this Invention we secure the considerable saving in time which is
effected by the design being traced on a greater number of parts of, the
surface to be engraved at the same time.
Having thus stated the nature of our Invention, and described two convenient
modes of carrying the same into operation, we wish it to be understood that
we do not intend to limit ourselves to the details given, as they will vary
according to the peculiar construction of the machines to which our improve-
ments are applied, and we claim the improved mode of supporting and
actuating one or more additional rows of diamond or tracing points when
applied to the pentagraph machines hitherto employed for engraving and
etching rollers and other surfaces.
In witness whereof, we, the said Robert Leake and Joseph Beckett, have
hereto set our hands and seals, this Twenty-second day of August, One
thousand eight hundred and sixty-six.
ROBERT LEAKE.
(L.S.)
JOSEPH BECKETT. (L.S.)