CERTAIN IMPROVEMENTS IN MACHINERY OR APPARATUS FOR PUNCHING PATTERNS OR DEVICES UPON METALLIC PRINTING ROLLERS OR CYLINDERS
Year: 1859

page_text: PROVISIONAL SPECIFICATION left by Ramsey Lawson at the Office
of the Commissioners of Patents, with his Petition, on the 14th
December 1859.
I, RAMSEY LAWSON, of Manchester, in the County of Lancaster, Engineer,
do hereby declare the nature of the said Invention for "CERTAIN IMPROVEMENTS
IN MACHINERY OR APPARATUS FOR PUNCHING PATTERNS OR DEVICES UPON METALLIC
PRINTING ROLLERS OR CYLINDERS," to be as follows:-
These improvements relate to machines wherein patterns or devices are
punched upon metallic rollers or cylinders, such cylinders being employed for
printing woven fabrics.
Firstly, my Invention consists in a pechliar arrangement of apparatus which
will obviate the inconvenience now experienced in self-acting machines, with
regard to the cylindrical roller being caused to revolve or move before the
punch has had time to be removed or lifted from its surface, causing thereby a
slight scar or scrath to the roller, which materally invalidates such cylindrical
roller; the means I use to accomplish a clear impression is by the employment
and use of two or more levers in connection with the pitcher lever, such levers,
the peculiar arrangement of which in passing over and under their centres,
will give a sufficient dwell to the cylindrical roller for allowing the punch to
be clearly lifted from the surface of the said roller before it partially revolves
or becomes moved for a fresh impression.

page_text: Secondly, the novel application of a brake in connection with the punch,
whereby the punch is firmly retained upon the surface of the roller during the
action of the hammer upon it.
Thirdly, a peculiar arrangement of finger or catch fixed to the framing of
the machine, or otherwise acting upon the ratchet motion for the purpose of
adjusting the cylindrical roller before receiving a fresh impression from the
punch.
Fourthly, the novel employment of a rod or bar supplied with sliding stops
for the purpose of acting upon a stud attached to the carriage, such bar or rod
being in connection with a lever which will stop or reverse the carriage
according to the pattern required.
Fifthly, my improvement consists in the employment of a lever (attached to
the front or hammer shaft) sliding or being worked against a quadrant fixed
to the framing, the said quadrant being supplied with moveable studs, such
studs and lever, when worked by hand, always allowing the coupling catches
for lifting the hammer to enter the adjustable crosshead attached to the
uprights sufficiently to allow of the uncoupling or release of such hammer,
making it necessary as the crosshead is raised or lowered between the uprights
when greater or less blow is required to the punch, that the stud upon the
quadrant must be adjusted according to the crosshead, thereby allowing the
operator to release the said hammer without any over straining the apparatus
in connection.
Sixthly, the employment of a ring containing a step or split boss encircling
the shaft or stud upon which the pitcher lever moves, such step or split boss
being tightened up or brought into closer contact by a set screw, thereby
taking all back lash or unevenness from the pitcher lever.
And, lastly, my improvements relate to a peculiar and novel arrangement
of machinery for driving and working the machine, whether by hand or self-
acting, such arrangement consists in placing the working gear for driving
metallic roller at one end of the mandrill, thereby allowing the other end free
for dorfing or replacing a fresh roller for impressions.