A method of electrophotography in which an electrostatic latent image is formed on the surface of a material layer and a non-magnetic cylinder is provided to confront the surface of said material layer. A permanent magnet roll made up of a plurality of symmetrically arranged magnetic poles extends axially in said cylinder. A magnetic brush is formed by attracting a semiconducting or insulating magnetic toner onto the cylinder with the aid of a magnetic attraction force of the permanent magnet ro...

A liquid, particularly but not exclusively a liquid of human origin such as blood serum or urine, is immunoassayed for antibodies, antigens or antibody: antigen complexes, using as a reagent in the analysis an active fraction from mouse ascitic fluid. This active fraction is a euglobulin and has the ability, like human C1q, to combine with antibody:antigen complexes but not with free antibody or antigen. Unlike human C1q, however, it remains active at high pH's and its activity is not destroyed ...

In the homogenization of molten metal with a gas, the gas is delivered to agitate the molten metal in a vessel, through an injector tube having a fine bore effective to prevent penetration of molten metal into and along the bore; when injection of gas is discontinued, molten metal is allowed to solidify on the tip of the tube to seal it; when gas is to be delivered to a second load of molten metal in the vessel, it is delivered, at least initially, at a pressure effective to unseal the tube at t...

A method and apparatus are disclosed utilizing a laser for heat treating a transformation hardenable workpiece. Sufficiently high laser power densities are provided at the workpiece surface to cause an incandescent reaction with the workpiece, but incandescent reaction is limited to a sufficiently short period of time to prevent any substantial melting of the workpiece. Pre-conditioning the workpiece prior to heat treatment, squelching the workpiece with a gaseous jet, and techniques for work-ha...

In a programmable controller of the type including a microprocessor having output address terminals, output address lines extending to external addressable devices, input/output bi-directional data terminals and means for applying a binary status code made up of binary signals on the data terminals at a preselected time during a cycle of the microprocessor and indicative of the type of machine cycle to be processed by the microprocessor there is provided a system for energizing a hardwired logic...

Zr-Fe alloys (15%-30% by wt Fe, balance Zr) start to sorb hydrogen at temperatures between 200.degree. and 250.degree. C. They are particularly useful for the sorption of hydrogen within the outer jacket of high intensity discharge lamps.

A procedure is disclosed in the application, for carrying out arc welding under water or in otherwise difficult external conditions. In the procedure, there is introduced in the arc area or in its immediate vicinity, an auxiliary substance having the purpose to boost the ignition of the arc and its burning and to retard the cooling of the weld bead produced, so that the emergence of gases from the welded seam is promoted and the quality of the weld seam improves. The auxiliary substance used con...

A banking apparatus using passbooks, such as for example a passbook printing apparatus built-in an automatic depositing machine, in which a passbook inserted in the apparatus is transferred to a printing position by means of a driving belt. A printing mechanism located in the printing position has a single platen on which a journal paper is normally wound. The passbook is positioned in an opened state on the platen keeping the journal paper thereon, and transaction information is printed on the ...

A plurality of two-piece fasteners are connected together by frangible plastic and are automatically fed past moveable wall portions to an area where they are in operative position to be acted upon by impacting pistons. A first inner and a second, outer, concentric pistons are provided, the second piston driving the outer component of the two-piece fastener through metal sheets to be connected together, and the first piston driving the inner fastener component. A common actuating piston may be p...

A method for the determination of one or more components of an immunological conjugate, e.g., antigens, of a fluid sample in a competitive or sandwich technique in which the conjugate is labelled and separated from its reactive mixture by reversible attachment to a solid surface. In a preferred embodiment, the solid surface comprises insolubilized sugar which reversibly bonds to a lectin covalently bonded to one member of the conjugate. After separation of such solid surface from the remainder o...