IMPROVEMENTS IN LETTER-PRESS AND LITHOGRAPHIC PRINTING MACHINERY
Year: 1867

page_text: LETTERS PATENT to Adam Paton, of Leeds, in the County of York,
Engineer, for the Invention of "IMPROVEMENTS IN LETTER-PRESS AND
LITHOGRAPHIC PRINTING MACHINERY."
Sealed the 17th January 1868, and dated the 18th July 1867.
PROVISIONAL SPECIFICATION left by the said Adam Paton at the Office
of the Commissioners of Patents, with his Petition, on the 18th July
1867.
I, ADAM PATON, of Leeds, in the County of York, Engineer, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN LETTER-PRESS
AND LITHOGRAPHIC PRINTING MACHINERY," to be as follows:-
The driving of the cylinder of the ordinary printing machine is defective
in so far as respects obtaining, a good "register," for the cylinder will some-
times stop short of a full revolution and sometimes go beyond it, according to
the speed with which it is driven, and either way a defective register in the
printing occurs. To obviate this defect I propose by the action of a brake to
arrest the motion of the cylinder (while it is driven by the ordinary gearing)
before it has completed its full revolution, and to force it through the remaining
part of the revolution by means of a lever, or spring, or both, which will give
it a regular and determinate amount of motion. A three-stepped cam is used
for working the drag or brake lever; this cam by its rotation puts a drag on
the cylinder at the time the cylinder is coming to a stop, it then relieves the
cylinder to allow it to be forced up to the required position, and it lastly puts

page_text: a light drag on the cylinder at or a little before the time the sheet meets the
types or lithographic stone in order to keep all the backlash of the teeth the
same way; or three separate cams doing the aforesaid work or motions respec-
tively may be employed. A wedge-shaped stop piece is affixed to one end of
the cylinder, or a drag wheel keyed on the shaft thereof, and as the cylinder is
rotated the stop piece meets a stop lever which prevents the cylinder from
passing the stopping point. To ensure the cylinder moving to this point a
lever is mounted on a fixed fulcrum and held up by means of tension springs,
or their equivalent is employed. The end of this lever lies within the orbit of
the rotating wedge-shaped stop piece, and when the stop piece passes the end
of the lever and presents its inclined side thereto the tension of the springs
will cause the lever to bear against the stop piece and force it forward into
contact with the stop lever before mentioned; the cylinder will thus be caused
to complete every revolution by means independent of the ordinary driving
gear, and not likely to introduce the irregularities of motion which produce
bad registering.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Adam Paton in the Great Seal Patent Office on the 18th
January 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME I, ADAM
PATON, of Leeds, in the County of York, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of July, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Adam Paton, Her special licence that I, the said Adam Paton, my
executors, administrators, and assigns, or such others as I, the said Adam
Paton, 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 LETTER-PRESS AND
LITHOGRAPHIC PRINTING MACHINERY," upon the condition (amongst others)
that I, the said Adam Paton, my executors or administrators, by an instru-
ment 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

page_text: 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 Adam Paton, 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
statement:-
The arrangements for driving the cylinder of the ordinary printing machine
is defective in so far as respects obtaining a good register, since the cylinder
will sometimes stop short of a complete rotation and sometimes go beyond it,
according to the speed with which it is driven, and either way a defective
register in the printing occurs. To obviate this defect I arrest by the action of
a brake the motion of the cylinder (while it is driven by the ordinary gearing)
before it has completed its full rotation, and force it through the remaining
part of the rotation by means of a lever or spring, or both, which will give it
a regular and determinate amount of motion. A three-stepped cam is used
for working the drag or brake lever; this cam by its rotation puts a drag on
the cylinder at the time the cylinder is coming to a stop, it then relieves the
cylinder to allow it to be forced up to the required position, and it lastly puts
a light drag on the cylinder at or a little before the time the sheet meets the
types or lithographic stone in order to keep all the back lash of the teeth the
same way; or three separate cams doing the aforesaid work or motions respec-
tively may be employed. A wedge-shaped stop piece is affixed to one end
of the cylinder, or to a drag wheel keyed on the shaft thereof, and as the
cylinder is rotated the stop piece meets a stop lever which prevents the
cylinder from passing the stopping point. To ensure the cylinder moving to
this point a lever is mounted on a fixed fulcrum and held up by means of
tension springs or their equivalent in operation or effect. The end of this
lever lies within the orbit of the rotating wedge-shaped stop piece, and when
the stop piece passes the end of the lever and presents its inclined side thereto
the tension of the springs will cause the lever to bear against the stop piece
and force it forward into contact with the stop lever before mentioned. The
cylinder will thus be caused to complete every rotation by meaus independent
of the ordinary driving gear, and not likely to introduce the irregularities of
motion which produce bad registering.

page_text: In Fig. 1 A is a cylinder or drag wheel acted on by the drag B, which drag
is worked by the cam D by the agency of the lever E and rod K, or by a
lever without a fulcrum. The cam D has three steps Nos. 1, 2, 3. No. 1 step
forces the drag so as to arrest the motion of the cylinder as it comes to a stop;
the No. 2 step relieves the cylinder or drag wheel of pressure, so that the
forcing lever C (Fig. 2) may force the stop piece F into its place against the
stop lever G; No. 3 step puts a pressure on the drag B at or near the time
the sheet is meeting the type or lithographic stone so as to keep the back lash
of the teeth the same way for every sheet; Fig. 3 shews a cam H used as
an equivalent for spring L (Fig. 2), as in the instance of lever E; the lever C
may be used without a fulcrum. It is evident that driving the cylinder by
the ordinary gear more than a rotation, and forcing it back by a lever or cam,
as before mentioned, is equivalent to driving the cylinder less than a rotation,
and forcing it through the remainder of the complete rotation.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, I hereby declare
that I claim the Invention of "Improvements in Letter-press and Lithographic
Printing Machinery," consisting in the adoption of the brake machinery, as
herein-before set forth, it being understood that I do not claim the constituent
parts, except when used as herein-before described.
In witness whereof, I, the said Alam Paton, have hereunto set my
band and seal, this Eighteenth day of January, in the year of our
Lord One thousand eight hundred and sixty-eight.
Witness,
ALEX. P. WRIGHT,
21, Cockspur St.,
Charing Cross.
ADAM PATON.
L.S.)