Abstract: A laminated or single layer glass cylinder and its method of making are disclosed. The laminated cylinder glass is a precursor component to enable making subsequent drawn tubing having high optical quality. The laminated cylinder glass may comprise a first layer of glass as a clad glass and a second layer of glass as a core glass. The second layer of glass may be bound to the first layer of glass. The second layer may have a higher CTE from about 5×10?7/° C. to about 100×10?7/° C. than the first layer of glass. The first layer and second layer of glass may have different softening points within about 200° C. of each other. In some embodiments, the first layer and second layer of glass may have different softening points from about 50° C. to about 200° C. of each other.

Abstract: A device and method for producing, by molding, a circular-shaped mechanical part made of a metal alloy. The device has a rotatable hollow mold for receiving a predetermined quantity of the metal alloy. The predetermined quantity of the metal alloy is defined by at least one segment of a metal alloy rod. An inductive heating device melts the metal alloy to a melting point. A blank of the mechanical part being formed by centrifuging the melted metal alloy. Cooling the blank in the hollow mold to a second temperature which corresponds to a desired malleability. Processing the blank with a shaping tool to obtain a desired internal profile. To harden and form the circular-shaped mechanical part, the blank is further cooled to a tempering temperature.

Abstract: A mold used in centrifuge casting is cooled by taking advantage of inherent characteristics of the centrifugal casting process, and in particular the shape of the remaining sprue. The sprue has a conical profile and a conical depression formed by a vortex which results from the spinning mold. The cooling apparatus comprises a housing and plunger which engage the surface of the sprue and draw heat from the mold. Thermal conduction from the hot metal through the runners and sprue to the cooling head allows a mold to cool faster than traditional methods.

Abstract: The device of the invention introduces cooling fluid to a rotary mould (41) surrounded by an annular cooling chamber (42). A non-rotatable annular box surrounds the outer wall of the annular chamber, and two annular nozzles (50, 51) rigid with the box (47) discharge in each case into an annular passage (57, 58) disposed between the outer wall and at least one non-rotatable wall rigid with the box. The fluid from the nozzles, after passing through the annular passage (57, 58), passes through an annular inlet zone (46), and through orifices (44, 45) into the annular cooling chamber (42).

Abstract: A centrifugal casting apparatus comprises a mold mounted for rotation about the vertical axis thereof and having a bottom provided with a through axial opening. A member having a helicoidally shaped surface is axially mounted within the opening in the bottom. The member has a lower portion to be immersed into a melt and extending out of the opening and downwardly of said bottom of the mold. The mold and the member are connected with a rotation drive and a vertical motion drive.

Abstract: Disclosed is an apparatus for centrifugal casting in which the support for the rotating permanent or semi-permanent molds is so constructed and arranged as to insure long life for the bearings which support the rotating parts of the mechanism. Also, the construction permits the rotating molds to be substantially enclosed by a housing so that water may be sprayed down onto the units during the casting operation without at the same time spraying the bearings or otherwise wetting the portions of the machinery required to be kept dry. Still further, the improved casting device comprises essentially three supporting shafts, one of which may be driven, so relatively located as to simultaneously support for rotating two molds, whereby two castings may be made from a supporting and driving shaft system powered by a single motor or the like.

Abstract: A Joule effect electric furnace for goldsmith, dental and the like melting processes comprises a graphite crucible which constitutes by itself an electric resistance element suitable for the Joule effect heating and is connected to an electric power supply.

Abstract: The installation comprises two centrifugal casting moulds which are roughly parallel to each other and are movable by rotation of a common support between a mould preparing station, a pouring station and a pipe extracting station, which stations are disposed in such maner that one of the moulds is in the axial extension of the pouring station when the other mould is in the axial extension of the extracting station and vice-versa. The two moulds are carried by rollers mounted on the common support and the latter comprises a horizontal platform which is rotatable about a central vertical axis relative to which the two moulds are symmetrically arranged.

Abstract: The device comprises cooling water spraying systems extending throughout the length of the mould for cooling the latter. At least one additional local cooling water spraying element is slidably mounted on a guide bar through a slide. The bar is parallel to the mould and the local spraying element is adjustable in position on the bar for each casting for further cooling a selected part of the mould.

Abstract: A plant for producing bimetallic sleeves by pouring molten so called babbitt metal into the space of a sleeve being rotated. The plant comprises a head stock and a tail stock mounted on a bed, the tail stock being slidable along the axis of the sleeve being babbitted, each mounting means for centering and clamping the sleeve that is poured in between them with the help of cones set up on the head and the tail stocks.The tail stock mounts a pouring device wherein the babbitt metal to be poured into the sleeve is delivered by a batcher. The pouring device includes a feed funnel adapted to receive the molten babbitt from the batcher, a pipe enclosed in the axis of the sleeve, a connecting pipe supplying the molten babbitt from the feed funnel into the pipe, and a chute onto which the molten babbitt is delivered from the pipe through an opening provided therein.

Abstract: A method and apparatus for casting steel slugs which utilizes a measured charge of molten steel discharged centrally of a rotating table having radial channels to distribute the metal rapidly to circumferentially-spaced, individual, trunnion-mounted receptacles at the end of each channel. The receptacles are designed to have a center of gravity outside the trunnion axis when empty, and inside the trunnion axis when charged. After a predetermined cooling period, a mechanical latch release allows the rotating, loaded receptacles to dump radially to a suitable conveyor and the cycle may be repeated.

Abstract: The machine comprises a casing, a rotary casting mould and means for spraying cooling water onto the mould. A tubular duct is secured to the inside of the casing and opens into the interior of the casing and is for connection to a forced suction means.

Abstract: The sealing structure comprises an annular sealing member disposed in an annular recess in a ring fixed to the non-rotating casing of a centrifugal casting machine. The sealing member bears sealingly against an annular radial flange connected to rotate with the rotary mould of the machine. An elastically yieldable annular chamber is interposed between the inner end of the recess and the sealing member. A source of fluid under pressure is connected to the inside of the chamber to expand the latter and urge the sealing member against the flange.