Improvements in Lithographic and. Letterpress Printing Machines.
Year: 1892

page_text: Date of Application, 2nd Mar., 1892
Complete Specification Left. 30th Nov. 1892-Accepted, 28th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Lithographic and. Letterpress Printing Machines.
I, SHEARD CHARLESWORTH, of Richmond Hill Iron Works, Oldham, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to lithographic and letterpress printing machines and the
object of my invention is to prevent the possibility of accidents to the impression
cylinder arising from moving carelessly or otherwise the front catch, when the
latter is made in the ordinary manner.
To effect this object I pivot the front catch to the cylinder bearing or frame of
the machine above its point of contact with the catch snug, and connect the front
catch by a rod to the usual cam by which the said catch is operated; for the
purpose that should the said front catch be by any means out of position at the
usual time of contact it will be pushed out of the way by the snug or bowl on
the revolving disc on the cylinder shaft.
Dated this First day of March 1892.
H. B. BARLOW,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Lithographic and Letterpress Printing Machines.
I, SHEARD CHARLESWORTH, of Richmond Hill Iron Works Oldham, in the
County of Lancaster, Engineer, do hereby declare the nature of this invention and
in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
My invention relates to lithographic and letterpress printing machines and the
object of my invention is to prevent the possibility of accidents to the impression
cylinder arising from moving carelessly or otherwise the front catch, when the
latter is made in the ordinary manner.
To effect this object I pivot the front catch to the cylinder bearing or frame of
the machine above its point of contact with the catch snug, and connect the front
catch by a rod to the usual cam by which the said catch is operated; for the
purpose that should the said front catch be by any means out of position at the
usual time of contact it will be pushed out of the way by the snug or bowl on
the revolving disc on the cylinder shaft.
The accompanying drawing represents a side view of part of a lithographic or
letterpress printing machine to which my invention is applied.
a is the frame of the printing press, the shaft or axis of the impression
cylinder on which is secured the usual brake disc c with the catch snug c¹ cast on
its side, the shaft of the cylinder having one of its bearings in the standard d,
secured to the frame a. The front catch e is pivoted to the standard dat d', above
the point where it comes in contact with the catch smug e; the lower portion of
the catch at eis pivoted to one end of a rod f which is connected to a lever
fulcrumed to the frame at and carrying a bowl which is pushed against the usual
cam by a spring f¹ on the rod.
The drawing represents the parts in the position they occupy when the brake
disc c is stationary the snug being held between the front catch e, and a back
catch, not shown; as soon as the shaft with the impression cylinder and brake
disc c are set in motion, the back catch having been withdrawn, the cam j allows

page_text: the spring to withdraw the rod and the front catch is withdrawn from the
disc e until the impression cylinder has nearly completed a revolution when the
front catch e is moved into position and locks the brake block c and shaft b. In
case the rod and catch e were moved by carelessness or otherwise the snug c¹
would press on the upper curved surface of the catch e and gradually and quietly
push it out of the way.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In a lithographic and letterpress printing machine, a front catch pivoted to the
cylinder bearing or frame of the machine at a point above its point of contact with
the catch snug which revolves with said cylinder, said front catch being operated
by a connecting rod and cam substantially in the manner and for the purpose herein
set forth.
Dated this 29th day of November 1892.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicant.