AN IMPROVED CONSTRUCTION OF LOCK-CATCH PLATES FOR FIXING STEREO PLATES IN POSITION FOR PRINTING PURPOSES
Year: 1883

page_text: LETTERS PATENT to Thomas Thompson Hodgson of 1 Gough Square, Fleet
Street in the City of London, Printer for an Invention of AN IMPROVED
CONSTRUCTION OF LOCK-CATCH PLATES FOR FIXING STEREO PLATES IN
POSITION FOR PRINTING PURPOSES
PROVISIONAL SPECIFICATION left by the said Thomas Thompson Hodgson
at the Office of the Commissioners of Patents on the 7th June 1883.
THOMAS THOMPSON HODGSON of 1 Gough Square, Fleet Street in the City of
London, Printer "AN IMPROVED CONSTRUCTION OF LOCK CATCH PLATES FOR
FIXING STEREO PLATES IN POSITION FOR PRINTING PURPOSES
د"
This Invention is a method of securing stereotype plates upon metal or other
blocks by means of catches (or jaws) attached to or forming part of stems (or
plates) of some length which slide underneath the plate which they secure, and
between the blocks forming the bed of the plate, and which are held tight in
position by friction with the sides of the blocks between which they slide.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Thomas Thompson Hodgson in the Great Seal Patent Office on
the 7th December 1883.
THOMAS THOMPSON HODGSON of 1 Gough Square, Fleet Street in the city of
London Printer AN IMPROVED CONSTRUCTION
OF LOCK CATCH PLATES FOR
FIXING STEREO PLATES IN POSITION FOR PRINTING PURPOSES
The object of this invention is a new method of securing stereotyped plates
upon metal or other blocks by means of catches or jaws over lapping the edges of
the plates.
These catches or jaws are themselves attached to or form part of slips of metal
running underneath the plates and between the blocks upon which the plates rest
and are held in position by friction acting along their length.
In the diagram annexed hereto a b, a b are catch slips a being the head with its
overlapping catch or jaw and b the foot. These catch slips are narrow strips of
metal with rough sides to promote friction and are of uniform thickness
throughout.
T
xx, y y are the blocks on which the plate lies. The catch slips that secure the
plate at the sides and ends (top and bottom) running between them. The latter
are secured by friction from the side the former by friction from the bottom of the
page.
..
In the diagram the heads of the catch slips are flush with
sides of the bed of the plate and open on the right and foot.
may be reversed if desired but one side should remain open to
slip approaching or receding from the plate.
✓.
the left and upper
This arrangement
allow of the catch
The catch slips on the open sides are pushed up to the plate so as to grip it and
the forme is locked up in the usual manner.
Having now described the nature of my said invention and in what manner the
same is to be performed I declare that I claim
The lock catch plate composed of a clip jaw a and body b shown at Figure 1
for fixing stereo plates in position for printing purposes substantially as described
and as shown at Figure 2 of the annexed drawings
In witness whereof I the said Thomas Thompson Hodgson have hereunto set my
hand and seal this seventh day of December in the year of our Lord One thousand
eight hundred and eighty three
m T HODGSON