IMPROVEMENTS IN PRINTING MACHINERY.
Year: 1874

page_text: LETTERS PATENT to Thomas Galloway Dawson and Jeremiah Dawson,
both of Otley, in the County of York, Printers' Engineers, for the
Invention of "IMPROVEMENTS IN PRINTING MACHINERY.".
Sealed the 24th July 1874, and dated the 26th May 1874.
COMPLETE SPECIFICATION filed by the said Thomas Galloway Dawson
and Jeremiah Dawson at the Office of the Commissioners of
Patents, with their Petition and Declaration, on the 26th May
1874, pursuant to the 9th Section of the Patent Law Amendment
Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
GALLOWAY DAWSON and JEREMIAH DAWSON, both of Otley, in the
County of York, Printers' Engineers, send greeting.
WHEREAS we are in possession of an Invention for "IMPROVEMENTS
IN PRINTING MACHINERY," and have petitioned Her Majesty to grant
unto us, our executors, administrators, and assigns, Her Royal Letters
Patent for the same, and have made solemn Declaration that we are
the first and true Inventors thereof.

page_text: NOW KNOW YE, that we, the said Thomas Galloway Dawson
and Jeremiah Dawson, do hereby declare that the following Complete
Specification, under our hands and seals, fully describes and ascertains
the nature of the said Invention, and in what manner the same is to be
performed, in and by the following statement:-
This Invention relates to that class of printing machinery known
as Wharfedale single cylinder two-feeder machines. In these machines
the type bed and printing cylinder are coupled together and have a
reciprocating movement. The sheets of paper to be printed are fed
alternately at each side of the cylinder, and for each motion of the
type bed and cylinder a sheet is printed. Hitlierto the cylinders in
such machines have been made of one continuous and uniform
printing surface, or the surfaces have been constructed of moveable
pieces or segments; in the former the grippers are fixed in a recess
outside the cylinder, and only one size paper can be printed on the
machine as a two-feeder; in the latter the grippers are moveable in
the recess of cylinder, and various size sheets can be printed according
to the number and sizes of the segments or loose pieces of which the
surface of the cylinder is constructed.
The object of our Invention is to construct a cylinder furnished with
grippers to enable a machine of the class named to print any and
every size of paper, from the smallest to the largest size, for which
it is made as a two-feeder without the use of moveable pieces or segments
for the printing surface.
We accomplish this in the following manner :-The surface of
cylinder is made rather larger than the largest shect to be printed.
The gripper shafts are placed inside the cylinder (instead of outside
as heretofore), and are supported at the ends by suitable brackets fixed
in radial slots on the ends of the cylinders, or on the outside of cylinder
wheels, or inside of rim of cylinder.
Instead of the cylinder being furnished with a number of small
grippers as heretofore it is fitted with four thin continuous grippers'
of suitable shape and breadth, each extending from the centre margin
tape on the cylinder to the outside of the largest sheet to be printed;
on each of these grippers are fixed or cast projecting bosses, one at
each end, which are bored and furnished with set screws to secure
them to the gripper shafts. Slot holes are made round the circle;

page_text: Fig. 5 is a plan of a cylinder upon a larger scale for shewing
the slot holes M, M, more fully, in which the gripper bosses E, E,
move when the grippers are moved from one place to another on the
surface of the cylinder.
Having now fully described the nature of our Invention, and shewn
how the same can be carried into effect, we wish it to be understood
that we claim as our Invention,―
Firstly. The construction of a cylinder without loose pieces or segments
for the printing surface, as herein fully described.
Secondly. The fixing of the grippers' shafts inside the cylinder
beneath the printing surface instead of outside as heretofore, as herein
fully described.
Thirdly. The use of slot holes in the surface of cylinder for the
purpose of allowing the plate grippers to move over the printing surface
outside while the shaft is moved inside the cylinder.
In witness whereof, we, the said Thomas Galloway Dawson and
Jeremiah Dawson, have hereunto set our hands and seals, this
Twenty-third day of May, in the year of our Lord One thousand
eight hundred and seventy-four.
THOS. GALLOWAY DAWSON. (L.S.)
JEREMIAH DAWSON.
Signed, sealed, and delivered
by the above-named Thomas
Galloway
Dawson and
Jeremiah Dawson, in the
presence of
(L.S.)
WILLIAM DAWSON.