IMPROVEMENTS IN APPARATUS FOR CASTING PRINTING TYPES
Year: 1876

page_text: LETTERS PATENT to Thomas Mason, Type Mould Maker, No. 14, Cross Street,
Islington, in the County of Middlesex, for the Invention of "IMPROVEMENTS IN
APPARATUS FOR CASTING PRINTING TYPES."
Sealed the 2nd February 1877, and dated the 4th November 1876.
PROVISIONAL SPECIFICATION left by the said Thomas Mason at the Office
of the Commissioners of Patents on the 4th November 1876.
THOMAS MASON, Type Mould Maker, No. 14, Cross Street, Islington, in the
County of Middlesex. "IMPROVEMENTS IN APPARATUS FOR CASTING PRINTING
TYPES."
The jet or break of the mould is made with one or more undercut recesses or
inclined planes or bevels, which form corresponding inclined planes or shoulders on
the casting, so that the action of the mould opening with the casting in forces the
jet or break of the casting up the corresponding inclined planes or bevels of the
mould, thereby separating the break from the type, the type only falling out of
the mould as usual, the detached break falling into a receptacle apart from the
types.
The advantage of this Invention is "breaking off" without manual labour, as at
present.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Thomas Mason in the Great Seal Patent Office on the 2nd March 1877.
THOMAS MASON, Type Mould Maker, No. 14, Cross Street, Islington, in the
County of Middlesex. "IMPROVEMENTS IN APPARATUS FOR CASTING PRINTING
TYPES."
My Invention relates to improvements in the formation of the parts of a type
mould variously called jets, breaks, or slips, whereby a great saving of time and
labour is effected, inasmuch as by my Invention I am enabled to dispense with that
branch of the type forming trade technically known as the " breaking off."
[Price 4d.]

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 is a plan of the under side of the top half.
Figure 2 is a plan of the upper side of the lower half of a type mould, with my
improvements in the breaks.
Figures 3 and 4 are end views of the upper and lower halves of the mould respec-
tively, showing the insides of the same.
Figures 5 and 6 are side views on an enlarged scale of a type and break cast in
the mould, with my improvements herein-after described.
The improvements consist of an inclined recess A of
form in each of the
breaks B of the two halves of the mould, shewn in Figures 1, 2, 3, and 4, which
when the metal is injected into the same form corresponding
shaped shoulders
C, C, on each side of the break D of the type E, see Figures 5 and 6. As the
mould is opened with the type or casting in it the contrary actions of the inclines
A, A, and C, C, Figures 3, 4, 5, and 6, produce a strain sufficient to sever the break D
from the type E, Figures 5 and 6.
I also make the recesses in the breaks of the mould in a circular or other form,
either of which will effect the herein-described purpose, namely, to sever the break D
from the type E.
Having thus described the nature and object of my said Invention I wish it to
be understood that what I claim as my Invention is, the formation of angular or
circular recesses A in the breaks B of the mould, whereby opening the same (with
the casting in it) severs the break D from the type E, all substantially as and for
the purpose herein set forth and illustrated in the Drawings.
In witness whereof, I, the said Thomas Mason, have hereunto set my hand
and seal, this Twenty-fourth day of February, in the year of our Lord.
One thousand eight hundred and seventy-seven.