IMPROVEMENTS IN THE MANUFACTURE OF CHILLED CASTINGS AND IN APPARATUS THEREFOR
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by Henry Harris Lake at the Office
of the Commissioners of Patents on the 28th May 1883 communicated to
him from abroad by John A. Parks of the City and State of New York,
United States of America
HENRY HARRIS LAKE, of the firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN THE MANUFACTURE OF
CHILLED CASTINGS AND IN APPARATUS THEREFOR." [A communication to him from
abroad by John A. Parks of the City and State of New York, United States of
America]
This invention relates to an improved method of and mould or matrix for
manufacturing chilled iron castings and it consists essentially in constructing the
said mould or matrix with a water chamber surrounding the part to be chilled and
forcing a stream of cold water through the said chamber or cavity, thereby keeping
the said mould cool and at the same time causing it to retain its shape, so that in
casting a number of articles of the same form they will all be reasonably perfect.
This is of great advantage in casting such articles as wheels for railway vehicles,
for by the improved device and method of casting they will preserve their proper
diameters and curvatures though great numbers of them are cast from the same
mould or matrix, whereas by the method heretofore used they varied greatly from
a true circle, and thereby caused slipping of the wheels upon the rails, thus
increasing the wear upon the roadway and rolling stock of a railway
According to the said invention the chill plate or matrix against which the
casting is formed, is made with a water chamber or cavity through which a stream
of cold water is forced during the casting operation. An inlet pipe supplies water
to this chamber, preferably from some water forcing apparatus, and an outlet pipe
provides a discharge aperture for the escape of the water at the other extremity
of the said chamber. A bridge wall closes the water chamber completely, at a
point midway, or thereabouts, between the inlet and the outlet so as to compel the
water to flow completely through the whole length of the said chamber, the said
inlet and outlet being placed close up to the opposite side of the partition or wall,
for this purpose.

page_text: In the casting of pieces of considerable size, as for instance, wheels for railway
vehicles, the water chamber may be sub-divided into two or more compartments
by the introduction of as many partitions or stops as may be required and wherever
these stop walls are placed, there must be an inlet pipe, and an outlet pipe, placed
respectively on the opposite sides of, and close to the said stop partition, for the
reason above explained.
"
In this manner the whole surface of the matrix or mould may be kept
uniformly cool and nearly perfect in form, so that the wheels or rollers of any
description will be comparatively uniform in curvature and with all their radii
nearly equal
This form of water chambered chill plate may be used with great economy in
casting many articles that do not need chilling, but which may be cast with a chill
without injury or deterioration, such as window or sash weights