Methods of preparing Group IVA and Group VIA organometallic compounds, particularly Group IVA organometallic compounds, are provided. Such manufacturing methods employ an amine and/or phosphine catalyst in a transalkylation step and may be performed in a batch, semi-continuous or continuous manner.

The invention concerns a two-stroke internal combustion engine supplied with gasoline, diesel, fuel, or other conventional fuel comprising a piston (2)-cylinder (1) assembly, said cylinder (1) providing exhaust ports (11), said piston (2)-cylinder (1) assembly providing a head (5) slidable within said cylinder (1) between the Top Dead Centre of the piston (2) stroke and a closure position of the exhaust ports (11), said slidable head (5) providing a transfer valve (9) for fresh air or fresh air-…

A method of depositing a Group IV metal-containing film on a substrate by conveying one or more of certain Group IV organometallic compounds in a gaseous phase to a deposition reactor containing a substrate and decomposing the one or more Group IV organometallic compounds to form a film of a Group IV metal on the substrate is provided. Such Group IV metal-containing films are particularly useful in the manufacture of electronic devices.

An in-rush current controller for a mains power rectification circuit including a fill wave rectifier and a capacitor. A serial resistor suppresses in-rush currents. The controller includes a sensing circuit that controls a pair of silicon controlled rectifiers to cyclically shunt or isolate the resistor during normal operation. Thus, power is not dissipated by the resistor and undesirable heat is not generated during normal operation. The sensing circuit responds to abrupt rises in voltage (typ…

A padded corner bumper comprises an elongated core formed of a cushioning material, an outer decorative cover formed of vinyl-coated fabric, and a backing material formed of polypropylene mesh. The core has a front, a back coextensive with the front, and a continuous side edge extending between the top and bottom. The outer decorative cover and backing material are stitched together to form a casing that completely surrounds the core, the backing being positioned only over the back of the core. …

An acoustic switch device that independently operates two or more electrical appliances. The acoustic switch operates a first electrical appliance upon receipt of a first series of acoustic signals and operates a second electrical appliance upon receipt of a second series of acoustic signals that is different from the first series of acoustic signals.

An abrasive tool includes a superabrasive grain component, a filler component that comprises hollow bodies and a vitreous bond. Natural and synthetic diamond, cubic boron nitride and combinations thereof can be employed as the superabrasive grain component. The vitreous bond component includes zinc oxide and at least two alkali metal oxides. The vitreous bond component can further include barium oxide. A method for producing an abrasive tool includes combining a superabrasive grain component, a …

A wave guide fitted at the output of a loudspeaker, in front of the membrane or in front of the orifice of a compression chamber, along the axis of the transducer being considered, and comprising a conduit which expands from its input to its output. The area of the output orifice of the wave guide is planar and oblong, that its conduit comprises a passage between the input orifice and the output area, adapted to guide the waves along a general direction from which the shortest paths allowed in t…

For one or more disclosed methods, a supply voltage is supplied to an integrated circuit, the integrated circuit is placed in a test mode to select one of a plurality of reference voltage generators on the integrated circuit to supply to another voltage generator on the integrated circuit a reference voltage that is at least partially dependent on the supply voltage, and the integrated circuit is tested with the reference voltage supplied to the other voltage generator. One or more disclosed int…

A keyword is provided for each file, and a list of a plurality of files is displayed using a tree structure based on the keywords. From the file list, a source file to be moved or copied is selected, and is moved or copied to a different location. Then, a keyword corresponding to the location to which the file has been moved or copied is added to the source file. In addition, the form of the source file is converted to a file form that corresponds to that at the location to which the file is mov…