Pipes and other similar Articles.
Year: 1885

page_text: Pipes and other similar Articles.
We RICHARD SMITH 38 Sloane Street, Mechanical Engineer and GEORGE WOOD
3 Butcher Street Pattern Maker, both of Bradford in the County of York,
lo hereby declare the nature of our said invention for IMPROVEMENTS IN THE
METHOD OF AND APPARATUS FOR MOULDING PIPES, AND OTHER SIMILAR ARTICLES,
to be as follows:-
This invention relates to Improvements in the method of, and apparatus for
frming the moulds of pipes, and other objects of a transverse circular section, by
which means the process is greatly facilitated, and the surface of the mould is left
smoother, and,in a better condition to impart a "clean" surface to the castings.
To carry out our invention we employ an iron table perfectly true and smooth
on its upper surface, and the pattern to be moulded is made to accurately fit, and
pass through a corresponding hole in such table. The pattern is supported by
means of prolongations formed on each end of it, which rest in V bearings fitted
to the table. The prolongations on the end of the pattern have portions cut away
so as to form flat faces which correspond with and fit in the V bearings and when
the pattern is resting with the flat faces in the V bearings considerably less than
half the pattern appears above the surface of the table, but by twisting the pattern
round by means of a lever or other suitable appliance, until one of the flat faces at
each end of the pattern rest across. the herein before mentioned V bearings, the
pattern is thereby raised and exactly half of it appears above the surface of the
table.
By means of the above apparatus moulds for pipes, and other objects of a
transverse circular section, are formed in the following manner.
The pattern is placed with the flat faces, formed on, the prolongations at each
end of it, resting in the herein before mentioned V bearings, then an empty flash.
is placed on the table and over the pattern, filled with sand and rammed tight, the
pattern is then twisted round by means of the lever or other suitable appliance
until one of the flat faces, on the prolongations at each end of the pattern, rest
across the V bearings, thus raising the pattern until exactly half of it appears
above the surface of the table, thereby still further compressing the sand in the
flask. The pattern is now twisted back to its original position and by its rotary

page_text: motion imparting a perfectly smooth surface to the mould, and simultaniously
withdrawing it from the mould. The flask is then lifted from the table and the
apparatus is in position to have the operation repeated.
The same process is employed for both top and bottom flasks, and the ordinary
means are used for admitting the molten metal. The pins employed to retain the
flasks in position while being moulded fit into holes in the table, and they may be
removed when it is necessary to use Basks fitted with such pins.
Lugs or other projections are cast on the pipes and other similar articles by
using a loose pattern of the lug, or other projection and moulding it in a small
flask, placed upon the flask containing the pattern of the pipe, or other similar
article.
COMPLETE SPECIFICATION.
Improvements in the Method of and Apparatus for Moulding
Pipes and other similar Articles.
We RICHARD SMITH of 38 Sloan Street Mechanical Engineer, and GEORGE
WOOD 4 Butcher Street, Pattern Maker, both of Bradford in the County of York,
do hereby declare the nature of our invention for IMPROVEMENTS IN THE METHOD
OF AND APPARATUS FOR MOULDING PIPES AND OTHER SIMILAR ARTICLES and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :—
This invention relates to improvements in the method of, and apparatus for
forming the moulds of pipes and other objects of a similar section, and consist in
imparting a combined rotary and vertical motion to the pattern to be moulded,
by which means impressions of half such pattern are more readily made and the
surface of the mould is left smoother and in a better condition for giving a "clean"
surface to the metal cast therein, than heretofore.
To carry out our improvements we employ an iron table, the upper surface of
which is true and smooth, and the pattern to be moulded is made to accurately fit
and pass through a corresponding hole in such table. The pattern is supported by
flanges, or collars, formed on prolongations on each end of it, which rest in
V bearings fitted to the table, the Banges have portions cut away, so as to formn
flat faces which correspond with, and fit in the V bearings; and when the pattern
is resting with the flat faces of the flanges in the V bearings considerably less than
half the pattern projects above the surface of the table, but by turning the pattern
round by means of a lever or other suitable appliance until one of the flat faces

page_text: on each of the flanges rest across the herein before mentioned V bearings; the
pattern is thereby raised and exactly half of it projects above the surface of the
table.
By means of the above apparatus moulds for pipes and other objects of a similar
section are formed in the following manner.
The pattern is placed, with the flat faces, of the flanges, formed on the
prolongations at each end of it, resting in the hereinbefore mentioned V bearings ;
an empty flask is placed on the table over the pattern and filled with loam, or
sand, which is secured in the flask by a cover, hinged to standards on the table,
and fastened by a suitable divice over the flask. The pattern is then turned round
by means of a lever or other suitable appliance until one of the flat faces of the
flanges on the prolongations at each end of such pattern rest across the V bearings,
thus raising the pattern until exactly one half of it projects above the surface of
the table; thereby compressing or ramming the sand in the flask, and simultaniously
making an impression of half the pattern in such sand. By further rotating the
pattern, the flat faces of the flanges on the ends of the pattern again rest in the
V bearings; thus the pattern is lowered to its original position, and the motion
of the pattern imparts a firm and smooth surface to the impression in the sand.
Reference is to be had to the accompanying drawings, in which similar letters of
reference indicate corresponding parts in all the figures.
Figure 1. represents an end view of our improved apparatus, the pattern being
raised so that half of it projects above the table. Figure 2 is a similar view, with
the pattern at its lowest point, a flask is shown in position on the table, and the
hinged cover placed thereon. Figure 3 is a side elevation of the same. Figure 4
is a plan with the cover removed and Figure 5 is a longitudinal section, of the
apparatus.
The iron table A is true and smooth on its upper surface and the pattern B
(whis is for the purpose of illustrating the invention is formed after the manner of
a socket pipe at one end, and a flange pipe at the other) is made to fit and pass
through a corresponding hole in such table. On prolongations of the core C of
the pattern, flanges S are formed with portions or segments cut away, leaving flat
faces E corresponding with the angle of the V bearings D at each end of the table,
and the pattern being placed with two of such faces at each end of the pattern in
the V bearings (as shown by Figure 2); the flask G is placed in position over it,
and filled with sand, the cover N hinged to standards O on the table is closed over
it, and secured to the other side of the table by passing the link P over the curved
tongue R on the table A. The pattern B is then turned partly round, by means
of the lever F, until one of the flat faces E on each of the flanges S at the ends of
such pattern B rest across the V bearings D, thereby raising the pattern until half
of it projects above the surface of the. table, (as shown in Figure 1) thereby
compressing the sand and simultaneously making an impression of half the pattern
in such sand. The pattern B is then turned further round until it resumes its
original position, the flask G is then removed, and the operation may be repeated.
The lugs H alternately bear upon the curved bearings M, thus only allowing the
pattern B to drop twice during each revolution; thereby a hard and smooth surface
is imparted to the mould. The inclined ribs K and K' are for the purpose of
wedging, or compressing the sand against the faces of the pattern flange J, when
the pattern is being raised; or the sliding wedge L resting on the core C of the
pattern B may be employed in place of the inclined rib K¹, thus when the wedge L
is raised with the pattern B the sand is pressed towards the face of the flange J.
A portion of the flange J is cut away for convenience when removing the flask G
after the impression of the pattern is formed. The sides of the flask G are made
taper or closer together at the top than at the bottom, thus when the pattern B is
raised, the sand in such flask is more perfectly compressed.
The pins T for guiding and retaining the flask in position, fit in holes in the
table, and they may be removed when employing flasks provided with pins for
that purpose. The flasks intended to form the lower half of the casting are

page_text: fitted with such pins, and the flasks intended for the upper half are made with
corresponding holes for receiving the same.
The usual provisions are made for admitting the molten metal into the mould.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare what we
claim is
Rotating and simultaneously imparting a vertical motion to the pattern of pipes
and other objects of a similar section substantially as herein shown and described,
and for the purpose specified.
Dated this 24th day of December 1885.
DRACUP & NOWELL,
Bradford,
Agents for the Applicants.