IMPROVE- MENTS IN PRESSES FOR LITHOGRAPHIC AND OTHER PRINTING
Year: 1863

page_text: LETTERS PATENT to Richard Archibald Brooman, of 166, Fleet Street,
in the City of London, Patent Agent, for the Invention of "IMPROVE-
MENTS IN PRESSES FOR LITHOGRAPHIC AND OTHER PRINTING."-A communi
Land he Loan Theodors Dunur of Donic Fron
Sealed the 10th May 1864, and dated the 14th November 1863.
PROVISIONAL SPECIFICATION left by the said Richard Archibald
Brooman at the Office of the Commissioners of Patents, with his
Petition, on the 14th November 1863.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN PRESSES FOR LITHOGRAPHIC AND OTHER PRINTING," to be as
follows:-
This Invention relates, first, to a new arrangement of the frame of presses,
and consists in substituting for the ordinary side frames or cheeks an inverted
arch-shaped or central frame, the upper extremities of which support the
ends or axis of the cylinder of the press. To this central frame is fixed by
bolts or otherwise the outer or general frame carrying the guides on which the
rollers which support the printing table run. The outer and central frames
also support a rail or gallery extending all round the press to which the holder
or bearings of the distributing rollers are fixed.
The Invention refers, secondly, to a particular form of the cylinder, and in
lithographic presses to the arrangement of the damping rollers. In ordinary

page_text: lithographic presses it is necessary to raise the damping rollers by special
appliances at the moment of the return of the stone for its passage under the
cylinder after inking, in order to avoid the damping rollers taking up the ink;
to obviate this inconvenience I arrange the cylinder and the damping rollers
as hereafter described, in such manner that the cylinder in its rotary movement
takes the rollers with it. As only about half the circumference of the cylinder
acts, I dispense with the other half, and fit the damping rollers and other
appliances in its place. Thus, when the stone returns from being inked for
the printing, the cylinder is turned at the same time, taking the damping
rollers with it, which are thus raised, and the stone in passing comes in
contact only with the cylinder. When the stone, on the contrary, goes back
to be inked, the cylinder having up to this time continued its rotation, its half
circumference being equal to the length of the stone, the stone comes imme-
diately in contact with the damping rollers, the cylinder stopping at the same
moment, and thereby allowing the whole surface of the stone to be damped
during its movement. The cylinder has therefore an intermittent rotary
movement, while the stone moves alternately and continuously. The arrange-
ment just described dispenses with the separate movement for raising the
damping rollers, and has the additional advantage of allowing the inking
rollers to be placed much nearer the cylinder, thereby diminishing the space
over which the printing table and the stone travel.
The to-and-fro movement of the stone or other matter to be printed from is
obtained, as hereafter described, by means of a pinion and an endless rack in
the form of a parallelogram with rounded corners, and connected to the table
carrying the stone; the pinion is fixed to a support pivoted on the fly wheel
shaft, on which a driving pinion in gear with the first-mentioned pinion is also
fixed; the first-mentioned pinion carries two small rollers acting as guides, and
running in slides fixed to the rack, the pinion being made to rotate; the rack
receives an alternate to-and-fro motion, carrying with it the stone or other
matter to be printed from.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fourteenth day of November, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-seventh year
of Her reign, did, for Herself, Her heirs and successors, give and grant
unto me, the said Richard Archibald Brooman, Her special licence that I, the
said Richard Archibald Brooman, my executors, administrators, and assigns,
or such others as I, the said Richard Archibald Brooman, 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 PRESSES FOR LITHOGRAPHIC
AND OTHER PRINTING," (communicated to me from abroad by Jean Theodore
Dupuy, of Paris, France,) upon the condition (amongst others) that I, the
said Richard Archibald Brooman, 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 Richard Archibald Brooman, do hereby
declare the nature of the said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by
the following statement thereof, reference being had to the Drawings hereunto
annexed, that is to say :-
This Invention relates, first, to a new arrangement of the fratne of presses,
and consists in substituting for the ordinary side frames or cheeks an inverted
arch-shaped or central frame, the upper extremities of which support the ends
or axis of the cylinder of the press. To this central frame is fixed by bolts or
otherwise the outer or general frame carrying the guides on which the rollers
which support the printing table run. The outer and central frames also.
support a rail or gallery extending all round the press to which the holders or
bearings of the distributing rollers are fixed.
The Invention refers, secondly, to a particular form of the cylinder, and in
lithographic presses to the arrangement of the damping rollers. In ordinary
lithographic presses it is necessary to raise the damping rollers by special
appliances at the moment of the return of the stone for its passage under the
cylinder after inking, in order to avoid the damping rollers taking up the ink.
To obviate this inconvenience I arrange the cylinder and the damping rollers

page_text: as hereafter described in such manner that the cylinder in its rotary movement
takes the rollers with it. As only about half the circumference of the cylinder
acts, I dispense with the other half, and fit the damping rollers and other
appliances in its place. Thus, when the stone returns from being inked for the
printing the cylinder is turned, at the same time taking the damping rollers
with it, which are thus raised, and the stone in passing comes in contact ouly
with the cylinder. When the stone, on the contrary, goes back to be inked,
the cylinder having up to this time continued its rotation, its half circum-
ference being equal to the length of the stone, the stone comes immediately in
contact with the damping rollers, the cylinder stopping at the same moment,
and thereby allowing the whole surface of the stone to be damped during its
movement. The cylinder has therefore an intermittent rotary movement,
while the stone moves alternately and continuously.
The arrangement just described dispenses with the separate movement for
raising the damping rollers, and has the additional advantage of allowing the
inking rollers to be placed much nearer the cylinder, thereby diminishing the
space over which the printing table and the stone travel.
The to-and-fro movement of the stone or other matter to be printed from is
obtained, as hereafter described, by means of a pinion and an endless rack in
the form of a parallelogram with rounded corners, and connected to the table
carrying the stone; the pinion is fixed to a support pivoted on the fly wheel
shaft on which a driving pinion in gear with the first-mentioned pinion is also
fixed; the first-mentioned pinion carries two small rollers acting as guides and
running in slides fixed to the rack; the pinion being made to rotate the rack
receives an alternate to-and-fro motion, carrying with it the stone or other
matter to be printed from,
Figure 1 of the accompanying Drawings is a longitudinal elevation, Figure 2
a plan, Figure 3 a longitudinal section, and Figure 4 a transverse section
through the axis of the cylinder of a lithographic press constructed according
to this Invention.
The first part of the Invention consists, as before stated, in substituting for
the ordinary side frames or cheeks an inverted arch-shaped or central frame a.
The upper extremities of this frame a support the ends or axis c of the
cylinder 6 of the press. d, d, is the outer or general frame, fixed by bolts or
otherwise to the frame a, The frame d, d, carries guides on which the
rollers which support the printing table run. The frames d and a also
support a rail or gallery f, extending all round the press, and to which the
holders or bearings g of the distributing rollers are fixed.
The next part of this Invention refers to a particular form of the cylinder

page_text: and to the arrangement of the damping rollers.. I arrange the cylinder 6 and
the damping rollers i, i, in such manner that the cylinder in its rotary move-
ment, takes the rollers i with it. The rollers i instead of being placed at the
side, front, or back of the cylinder, as in ordinary presses, are fixed to the
cylinder 6 itself. I dispense with about one half the circumference of the
cylinder b, and fit the damping rollers i and other appliances in its place.
The rollers being arranged in this manner and bolted to the cylinder,
participate in its rotary intermittent movement. Thus, when the stone k
returns from being inked for the printing, in which case it does not require
damping, the cylinder 6 is turned at the same time, and takes the damping
rollers with it, which are thus raised, and the stone k in passing comes in
contact only with the cylinder. When the stone k goes back to be inked the
cylinder 6 having up to this time continued its rotation, its half circumference
being equal to the length of the stone, the stone comes immediately in contact
with the damping rollers i, the cylinder 6 stopping at the same moment, and
thereby allowing the whole surface of the stone to be damped during its move-
ment; the same operation is repeated continuously. The cylinder has, there-
fore, as before mentioned, an intermittent rotary movement, while the stone
moves alternately and continuously. The to-and-fro movement of the stone is
obtained by means of a pinion p and endless rack o connected to the table
carrying the stone. The pinion p is fixed to a support 9 pivoted on the fly
wheel shaft t. is the driving pinion, which is also on the shaft t, and is in
gear with the pinion p. The pinion p carries two small rollers 8, acting as
guides and running in slides fixed to the rack. The pinion p being made to
rotate, the rack o receives an alternate to-and-fro motion, carrying the stone
with it. When the pinion p descends in consequence of the passage of the
small rollers in their slides the rack advances, progressively diminishing in
speed up to the time when the line of the centres is straight for all the parts;
the speed being then at its slowest the pinion p continues to descend, and the
speed gradually increases up to the moment when the bent part of the rack
ceases and the straight part commences; the rack then advances regularly to
the other end, and so on continuously. This movement is indicated by the
red lines in Figure 3.
Although I have described this Invention with reference to lithographic
5 presses, yet the method herein-before described of transforming continuous
rotary motion into alternate rectilinear motion is applicable to typographic and
other printing presses.
And having now described the nature of the said Invention, and in what
manner the same is to be performeal, I declare that I claim,-

page_text: First, constructing lithographic and other printing presses with an inverted
arch-shaped or central frame, as herein-before described and illustrated in the
accompanying Drawings.
Second, fixing the damping rollers in the interior of the cylinder of
lithographic presses, substantially as herein-before described and illustrated in
the accompanying Drawings.
Third, imparting to-and-fro movement to the stone or other matter to be
printed from in lithographic and other presses, substantially by the means
and in manner herein-before described and illustrated in the accompanying
Drawings.
In witness whereof, J, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this Fourteenth day of May, One thousand
eight hundred and sixty-four.