A remotely operable safety valve mounted between the swivel and the kelly in drilling operation including a spherically-shaped valve element which is mounted in a generally tubular housing rotatable with the swivel sub, the kelly and the drill string. Hydraulic means move the valve element between open and closed positions in order to control flow through the drill-string and prevent in-line blow outs. As an additional safety feature, spring means move the valve element to a closed position in t...

A polycarboxylic acid alkyl or aryl ester corresponding to the formula ##STR1## is reacted with a dialkanolamine corresponding to the formula at a temperature from 50.degree. to 200.degree. C. The alcohol ROH formed during this reaction is removed from the reaction mixture and the product recovered corresponds to the formula ##STR2## in which the radicals n, X, A and R are as defined herein. The thus-produced poly-N,N-hydroxyalkylamides are particularly useful as cell-opening materials in the pr...

A mask is formed selectively on a crystalline silicon film containing a catalyst element, and an amorphous silicon film is formed so as to cover the mask. Phosphorus is implanted into the amorphous silicon film and the portion of the crystalline silicon film which is not covered with the mask. The silicon films are then heated by rapid thermal annealing (RTA). By virtue of the existence of the amorphous silicon film, the temperature of the crystalline silicon film is increased uniformly, whereby...

A machine for superfinishing the inner race surface of annular workpieces such as bearings with two honing stones of different grain sizes held by a common holder arm. Structure is provided for reciprocally arcuately moving the holder arm perpendicularly of the plane of rotation of the workpiece. Structure is also provided for moving the holder arm in a direction generally perpendicular to the axis of rotation of the workpiece toward and away from the inner race surface. A lever mounted on the h...

Diagnostic devices, systems and methods for detecting the presence of an analyte in a sample are provided. In one embodiment, the device comprises a substrate, a binder printed in a pattern onto a surface of the substrate, and a means for directing a sample towards the surface of the substrate that is printed with the binder. Systems of the present invention further include a light source that can be directed through the aforementioned means or another opening to the binder-printed surface to te...

A feedback enhanced triggering device for an electrostatic discharge protection circuit includes: a first inverter 30b having an output coupled to an input of a second inverter 30c, the second inverter 30c having an output coupled to a control node for a discharge device 31 such as a transistor; a high side feedback transistor 34 coupled to the output of the first inverter 30b, and having a control node coupled to the output of the second inverter 30c; and a low side feedback transistor 35 coupl...

A drying apparatus for use with many kinds of objects, but is particularly suited for use in drying most kinds of produce and vegetables including leaf vegetables. In one embodiment, the dryer includes a canted drum design which provides a number of benefits and advantages over prior art designs. The canted design allows the use of a spin drying method that breaks up clumps of material in the dryer and assists in the even distribution of material, thereby improving load balance. The canted desig...

An apparatus and method is given for evaluating a well fluid sub-sample at the well surface as the sample is transported to the well surface from a downhole wellbore location. The invention collects a formation fluid sample under pressure. The fluid sample is further pressurized with a traveling piston powered by the hydrostatic wellbore pressure. The pressurized formation fluid sample is contained under high pressure within a fixed volume chamber for retrieval to the well surface. Multiple coll...

A mask is formed selectively on a crystalline silicon film containing a catalyst element, and an amorphous silicon film is formed so as to cover the mask. Phosphorus is implanted into the amorphous silicon film and the portion of the crystalline silicon film which is not covered with the mask. The silicon films are then heated by rapid thermal annealing (RTA). By virtue of the existence of the amorphous silicon film, the temperature of the crystalline silicon film is increased uniformly, whereby...

A mask is formed selectively on a crystalline silicon film containing a catalyst element, and an amorphous silicon film is formed so as to cover the mask. Phosphorus is implanted into the amorphous silicon film and the portion of the crystalline silicon film which is not covered with the mask. The silicon films are then heated by rapid thermal annealing (RTA). By virtue of the existence of the amorphous silicon film, the temperature of the crystalline silicon film is increased uniformly, whereby...