Apparatus is disclosed for producing controlled nuclear-fusion reactions. A generally circular cathode has concentrically positioned therein a generally circular anode having multiple openings for the free flow of electrons therethrough. The anode encloses a volume free of tangible structure. An electron-emissive electrode in the interelectrode space between the anode and cathode emits electrons which penetrate the anode and enter the central volume, establishing a negative space charge therein....

This invention relates in general to a method and apparatus for welding tubes from a metal sheet which is formed into a tubular configuration with a longitudinally extending slot or welding gap, and which includes sensor means adjacent the slot for accurately positioning a welding device. The welding device comprises an electron beam welder having means associated therewith for shifting the beam or the holder for the beam welder in accordance with the position of the longitudinal slot of the for...

The invention herein described was made in the course of or under a contract or subcontract thereunder with the Department of the Army. An illustrative embodiment of the invention is directed to method and apparatus for manufacturing microchannel devices. Typically, individual glass tubes are suspended vertically in a furnace. A vacuum is drawn within the furnace so that the inner surfaces of the tubes, exposed to atmospheric pressure, will not collapse during heating and drawing. At temperature...

First and second members (e.g. pipes, fittings) of cross-linked polyolefinic material such as polyethylene having a melt flow index (MFI) of zero are joined using a third member of polyolefinic material such as polyethylene having a higher MFI e.g. 0.3. The first member 10 and the third member gripped by clamps 18, 20 of a butt fusion machine are pressed against opposite faces of a heater plate which is then withdrawn and the members are pressed together by the clamps. Only the third member is u...

Disclosed is a process and device for fusing cells in which the cells are doped with magnetic particles and exposed to a nonhomogeneous magnetic field which permeates the fusion space in such a way that the doped cells collect close together, and then, in order to create the disruptions in the membrane structures of the adjacent cells, the cells are exposed either to the pulse of an electric field of at least the level of the breakdown voltage or to chemicals which cause the disruptions in the m...

Apparatus for controlling intermittent contact at different points of a consumable element (such as an electrode) with a member (such as a workpiece to be locally hardened) by vibrating the element at high frequency and in such manner as automatically to compensate for consumption of the element and also accommodate and follow irregular contours on the member. Such apparatus is especially suitable for use in a metallic fusion system wherein a consumable electrode imparts its characteristics to t...

Members especially hollow members 10, 12 such as pipes and pipe fittings one member 12 of cross-linked polyethylene say and the other member 10 of medium density polyethylene say are joined by fusion using a butt fusion machine. End surfaces of the members are pressed at higher pressure against a hot plate 18 to upset only the medium density material to form beads 20, 22. No cross-linked material is upset to form beads. The pressure is reduced during a soak stage then the plate is removed and th...

Cell electrofusion apparatus, for example for the production of hybridomas, comprises a flow-through capillary (14) surrounded by a water-cooled jacket (16) and through which a physiologically normal medium (such as a tissue culture fluid) containing cells is pulsed by a pump driven syringe (28), high voltage pulses being applied to electrodes (18) at opposite ends of the channel, which voltage pulses are of a magnitude and duration such that, taking into account the rate of fluid flow through t...

This invention relates to an electrofusion joint, in which the electric power is supplied to a heating wire, which is buried in a resin, to melt the resin and thereby connect pipes together, and more particularly to an electrofusion joint, in which a member to be connected to a sensor-carrying connector is molded unitarily with the joint with a code member, which is to be detected by the sensor, molded unitarily with the member to be connected. A code displayed on the code member is read by the ...

A new gene--MN--and proteins/polypeptides encoded therefrom are disclosed. Recombinant nucleic acid molecules for expressing MN proteins/polypeptides and recombinant proteins are provided. Expression of the MN gene is disclosed as being associated with tumorigenicity, and the invention concerns methods and compositions for detecting and/or quantitating MN antigen and/or MN-specific antibodies in vertebrate samples that are diagnostic/prognostic for neoplastic and pre-neoplastic disease. Test kit...