Improvements in Forming Cast Metal Types.
Year: 1893

page_text: Date of Application, 16th Nov., 1893-Accepted, 16th Dec., 1893
COMPLETE SPECIFICATION.
Improvements in Forming Cast Metal Types.
I, HENRY BARTH, President of the Cincinnati Type Foundry, residing at
Cincinnati, Ohio, United States of America, 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 has relation to type-founding machines; its object being to
facilitate the production of type of the character employed in type-setting machines,
which type are to be provided with cross-grooves at one side of their bodies
usually at the side opposite the customary "nick"-of definite number and
relative position, to registor with corresponding projections in the slits of the supply
cylinder of the setting machine. The number and relative positions of the cross-
grooves vary with the character to be imprinted by the type as a guide to prevent
placing the type in the wrong slit.
In producing type of this character great difficulty has been found heretofore
in forming the grooves with sufficient accuracy of alignment and position; and
processes of casting, milling and planing have been resorted to without success.
have succeeded however by the use of special moulds in producing type of
the desired character and accuracy of grooving, by casting in the type-casting
machine.
My invention then consists in a mould adapted to use with any suitable founding
machine, by which type of the said character suitably grooved, may be produced,
in and by the ordinary operations of casting and finishing-a series of such moulds
or parts of moulds being required to produce a font or fonts of type, each mould or
part being adapted to produce type containing a given character, properly grooved
for such character.
My invention is illustrated in the accompanying drawings exhibiting a mould and
immediately adjacent parts of an approved form of type-casting or founding
machine in use.
In these drawings
Figure is an isometric perspective view of a mould complete ;
Figs. 2 and 3 are a front and a side elevation of the plunger of the mould-
(which in this case operates vertically but within the purview of my invention
might operate horizontally or at any angle);
Fig. 4 is a plan or top view of the plunger;
Figs. 5 and 6 are a top and a side view of the finished type;
Fig. 7 is an end view,
Fig. 8 a side view, and
Fig. 9 a top view of the improved cheek-piece of the mould.
Referring now to the drawings the mould of a type founding machine embodying
my improvements is in all essential respects the same, whatever may be the
characteristics of the machine otherwise. As here exhibited, it consists of a heavy
base-plate 63 (Fig. 1), side-members or "cheeks" 64 65; jet-pieces 66 and 67;
and body-piece 74; (omitting a sliding cover constituting the top of the moull as
not concerned with my present invention).
All these parts or their equivalents are found in all type-founding machines,
performing substantially the same function. In my improved construction however
I omit the usual projection or projections from the cheek-piece 64-since, in the
particular class of type herein specified, no "nicks" are required, and the
corresponding groove at the upper end of the body-piece 74 constituting
the plunger 68.
For the types of each separate character a separate cheek piece 65 is

page_text: provided from the end face of which constituting the side of the type-mould a
number of parallel projections a a etc. are formed, standing flush with the top of the
mould and projecting uniformly into the cavity of the same. In the preferred
construction herein shown I form the projections described by milling in the face
of the cheek-piece the desired number of parallel slits and insert therein flat
rectangular plates a of greater width than the depth of the slits, so that the
excess of width constitutes the projections described. These plates are held in
place by a pin or pins c inserted from side to side of the cheek-piece passing
through the series of plates. As already intimated the plates project in parallel
relations and are spaced apart in the order required by the particular type-character
to be produced.
While I prefer the construction thus described, for reasons to be stated a
cheaper construction might be employed, such as a separable face for the cheek-
piece with permanent projections milled upon its face. The preference above
expressed is based upon the facility afforded for removing the plates a in order to
allow the face of the cheek-piece 65 to be "lapped as occasion may require, and
thus preserve an absolutely true surface for the type itself, and also to enable the
pieces a to be separately fitted, accurately gauged, and adjusted to the grooves b
of the plunger 68. By these means any warping or molecular changes due to
repeated heating and cooling in the preliminary use of the apparatus, may be
corrected from time to time until the parts attain their final unchangeable molecular
conditions.
The plunger 68 is provided with grooves b accurately formed and spaced apart
to pass over and upon the projecting ends of the plates a in its upward move-
ment each separate check-piece 65 requiring a separate plunger 68 to correspond.
Across and below the inner ends of the grooves 6 the plunger is made somewhat
thinner, in order to facilitate forming the grooves b and permit the planing or
milling tool to run through free and to facilitate also the smoothing and "trueing-
up" of the grooves.
It will be obvious that the principle of my invention is applicable to all forms of
type-founding machines; and that the projections a may be at either side of the
mould, the plunger being formed to correspond therewith."
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is;-
1. A type mould having one of its side faces or check-pieces provided with
parallel projections extending across the width of the same and into the cavity of
the mould said projections being arranged and spaced apart in such relations as
may be required for the type character produced in order to form corresponding
recesses as a selective guide for the type in a type-setting machine.
2. A type-mould having a cheek-piece provided with flat plates removably inserted
therein and projecting from the face thereof into the cavity of the mould.
3. In a type mould the combination of a cheek-piece provided with flat plates
inserted therein and projecting in parallel relations beyond the face thereof into the
cavity of the mould in combination with a plunger provided with corresponding
side grooves adapted to pass over and upon the edges of the plates.
4. In a type-mould the combination of a cheek-piece having parallel recesses cut
into the face-end of the same plates adapted to fit in said recesses and project
beyond said face and pins inserted from side to side through the recesses and plates
in series to retain the same removably in position.
Dated this 15th day of November 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.