IMPROVEMENTS IN STEREOTYPING APPARATUS
Year: 1876

page_text: LETTERS PATENT to Abraham Harrison and Joseph Evans, both of Derby, in
the County of Derby, for the Invention of "IMPROVEMENTS IN STEREOTYPING
APPARATUS."
PROVISIONAL SPECIFICATION left by the said Abraham Harrison and Josepi
Evans at the Office of the Commissioners of Patents on the 19th June 1876.
ABRAHAM HARRISON and JOSEPH EVANS, both of Derby, in the County of Derby.
"IMPROVEMENTS IN STEREOTYPING APPARATUS."
Our Invention relates to casting stereotypes type high, and the object of our
improvements is to construct the apparatus in such manner that it can be easily
adjusted or regulated to any required width of casting, and that type high storeo-
types may be produced with a comparatively small quantity of metal.
Our apparatus is composed of a rectangular frame, the depth of whose sides is
equal to type height. In this frame we employ longitudinal bars which may either.
slide in guides in the ends of the frame or fit into recesses in the ends. When they
slide in guides the ends of the bars should have projections or heels to keep them at
the desired distance apart; when they fit into recesses the recesses are so placed as
to leave the bars the required distance apart. Within the frame at one side thereof
is a longitudinal locking bar which is screwed up so as to hold all the others in
place. This locking bar is in depth equal to type height, but the other longitudinal
bars are, say, a "pica" (more or less) under type height.
The working of the apparatus will be readily understood. According to the
width of the stereotype to be cast a greater or less number of the longitudinal bars
are placed in the frame, and the locking bar is then screwed up tight. The usual
matrix is then placed under the frame in the casting box, the lid of the box is
brought down and secured, and the fluid metal poured in in the ordinary manner.
The metal fills all parts of the box not occupied by the frame or mould, and a stereo-
type is thus cast type high, which has a surface or top plate equal in thickness to
the difference between the depth of the longitudinal bars and the type high frame,
and which has longitudinal ribs corresponding with the spaces or intervals between
the longitudinal bars, the whole forming a stereotype of type height sufficiently
[Price 6d.]

page_text: strong for all purposes while containing a comparatively small quantity of metal.
The sides of the longitudinal bars may be bevilled or otherwise formed to suit any
form which may be required in the casting. Greater strength may be obtained if
thought necessary by having transverse grooves in the longitudinal bars so as to
form transverse ribs in the stereotype; the transverse ribs between the several
longitudinal ribs are preferred to "break joint" with each other, or, instead of
transverse grooves, grooves may be formed at an inclination to a transverse line.
Wo mark the ends of the frame with figures shewing the number of ems, so that a
cast of any given number of ems in width can be readily made.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Abraham Harrison and Joseph Evans in the Great Seal Patent Office
on the 19th December 1876.
ABRAHAM HARRISON and JOSEPH EVANS, both of Derby, in the County of Derby.
"IMPROVEMENTS IN STEREOTYPING APPARATUS."
Our Invention relates to casting stereotypes type high, and the object of our
improvements is to construct the apparatus in such manner that it can be easily
adjusted or regulated to any required width of casting, and that type high stereo-
types may be produced with a comparatively small quantity of metal.
Our apparatus is composed of a rectangular frame, the depth of whose sides is
equal to type height. In this frame we employ longitudinal bars or cores which
may either slide in guides in the ends of the frame or fit into recesses in the ends.
When they slide in guides the ends of the bars should have projections or heels to
keep them at the desired distance apart; when they fit into recesses the recesses
are so placed as to leave the bars the required distance apart. Within the frame at
one side thereof is a longitudinal locking bar which is screwed up so as to hold all
the others in place. This locking bar is in depth equal to type height, but the
other longitudinal bars are, say, a pica" (more or less) under type height.
"
The manner in which we prefer to carry our Invention into effect is represented
in the accompanying Drawings. Figure 1 is a plan view of the "plate" side of the
apparatus, shewing the frame and the longitudinal bars or cores in place. Figure 2
is a side view of the frame; Figure 3 a section of the same; Figure 4 a side view;
and Figure 5 a section of one of the longitudinal bars or cores. Figure 6 is a side
view, and Figure 7 a section of the longitudinal locking bar. Figure 8 a section of
the loose bar which carries the locking screws. Figure 9 a transverse section of the
frame and bars or cores, and Figure 10 a transverse section of a stereotype plate
which has been cast in the apparatus.
A, A, A, is the frame, the depth of whose sides is equal to type height. B, B, are
the longitudinal bars or cores, they are formed with projections C, C, at their ends
to enable them to slide in corresponding recesses D in the sides of the frame, and
they have also heels or projections E, E, at their ends to keep them at the desired
distance apart. The depth of these bars is about a pica less than type height. Fis
the locking bar, the depth of which is equal to type height; it is formed at its ends
with upper and lower projections G, H, to allow it to slide freely and evenly in the
sides of the frame. I is a loose bar, which after the bars B and the locking bar F
have been put into position is adjusted in the frame by means of side screws K, K.
The working of the apparatus will be readily understood. According to the
width of the stereotype to be cast a greater or less number of the longitudinal bars
or cores B are placed in the frame A, and the locking bar F and loose bar I are put
in place, the bar I being secured by the screws K. The locking bar F is then
screwed up tight by means of the screws L, L. The usual matrix is then placed
under the frame in the casting box, the lid of the box is brought down and secured,
and the fluid metal poured in in the ordinary manner. The metal fills all parts of

page_text: the box not occupied by the frame or mould, and a stereotype is thus cast type
high, which has a surface or top plate equal in thickness to the difference between
the depth of the longitudinal bars B and the type height frame A, and which has
longitudinal ribs M (Figure 10) corresponding with the spaces or intervals N
(Figures 1 and 9) between the longitudinal bars, the whole forming a stereotype
of type height sufficiently strong for all purposes while containing a comparatively
small quantity of metal. The sides of the longitudinal bars may be bevilled, as
shewn in the Drawings, or otherwise formed to suit any form which may be required
in the casting. Greater strength may be obtained, if thought necessary, by having
transverse or diagonal grooves O, O, of V, U, or other suitable shape in the longi-
tudinal bars B so as to form corresponding ribs in the stereotype (P, P, Figure 10),
these ribs between the several longitudinal ribs are preferred to "break joint" with
each other. We mark the ends of the frame with figures shewing the number of
ems, and have bars or cores (B) of various widths, so that a cast of any given
number of ems in width can be readily made.
And having now described the nature of our said Invention, and in what manner
the same is to be performed, we declare that we claim, constructing stereotyping
apparatus with movable bars or cores for adjusting the apparatus to any desired
width of casting, substantially as herein-before described and represented in the
accompanying Drawings.
In witness whereof, we, the said Abraham Harrison and Joseph Evans, have
hereunto set our hands and seals, this Sixteenth day of December, One
thousand eight hundred and seventy-six.
ABRAHAM HARRISON. (L.S.)
JOSEPH EVANS.
(I.S.)