Year: 1889

page_text: I, WALTER EDWARD KOCH, of the Borough of Sharpsburgh in the county of
Allegheny, and State of Pennsylvania, United States of America, Manager of Steel
Works, 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 relates to an improved apparatus for making solid tubes of cast steel,
and it consists in the arrangement and construction of parts as hereinafter pointed out
and described.
Referring to the drawings,
Figure is a view partly in elevation and partly in section, of my improved
apparatus for casting steel tubes.
Figure 2 is a cross section taken on the line a-x, of Figure 1, the same being
shown as at a time when the mold is charged.
Figure 3 is a detail view of the portion of the spindle bearing spring fins for
engagement with the bevel wheels.
I represent at a an iron mold, which may be either split or solid, but which is
preferably a split mold; this is set firmly on a base b, over a pit suitably arranged
and fitted to contain a hydraulic ram and cylinder. The base b, has an opening for
the passage through it of a spindle c, which is fitted loosely, in the ran h, of the
hydraulic cylinder g, in such a manner that the spindle c, may be readily drawn clear
out and upwards, through the mold, by any suitable means. On the top of the
spindle c, is fixed a knob d, of fire clay for the purpose of preventing fusion of the
end of the spindle when in contact with the molten steel. The spindle c, also has a
bearing at the top of the mold at 61, which receives and steadies it, when elevated and
in process of rotation. At e, on the lower portion of the body of the spindle, are
adjusted the spring fins, which are shown more in detail in Figure 3. At f, is shown
bevel wheels, connected with driving mechanism, arranged to give rotation to the
spindle c, when elevated sufficiently to engage by means of the spring fins e, with slots
on the inner surface of the bevel wheel f.

page_text: The mode of operation of my improvement is as follows:
The mold a, and spindle c, being in position as shown in Figure 1, with no portion
of the spindle, except the fire clay knob d, extending into the mold, I pour into the
mold a sufficient quantity of molten metal to form the size of tube desired; then
when the metal has set sufficiently, which point will appear from the observation of
the skilled workman, the spindle c, is by means of the hydraulic ram pushed up
through the yet molten core of metal, into the bearing 61, and as soon as the spindle c,
by means of the fins e, is in gear with the wheel f, a slow rotation of the spindle is
commenced.
This action results in giving to the inner face of the hollow tube thus formed
within the mold a smooth and planished finish. When in the judgment of the
operator this result has been attained, and the metal is sufficiently cooled, the spindle
may be withdrawn, the tube taken out of the mold, and the operation repeated as
often as desired.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that
what I claim is :
1. In an apparatus for casting steel tubes, the combination of a vertical mold, a
vertical rotary spindle adapted to be forced into said mold from below, and mechanism
for raising and rotating said spindle within the mold, substantially as specified.
2. The combination with the vertical mold, of a solid spindle which closes the
bottom of said mold and is capable of being raised and rotated in said mold, a bearing
at the upper end of the mould to receive the upper end of the spindle, and mechanism
for raising and rotating the spindle, substantially as specified.
3. The combination with the vertically movable and rotating spindle c, of the
spring fins e, at the lower end of said spindle, and the horizontal gear wheel f
having seats in its hub into which the fins enter, whereby a slow rotation is given to
the spindle when the same is raised into the mold, substantially as described.
Dated this 29th day of January 1880
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.