A system and method are disclosed for automatically refreshing a dynamic random access memory (DRAM) under a plurality of different operational conditions of an associated processor. When the processor is normally executing instructions it generates active signals which enable a generator circuit to generate timing signals. A hidden refresh circuit uses status signals and a first part of these tim...

Calculi, stones, calcified tissue and other material are broken down for removal from within a body using laser pulses that are delivered via an optical fiber and have a wavelength, intensity, energy per pulse and pulse duration selected to break down the object into smaller particles without delivering energy sufficient to cause damage to other tissue.

Calculi, stones, calcified tissue and other material are broken down for removal from within a body using laser pulses that are delivered via an optical fiber and have a wavelength, intensity, energy per pulse and pulse duration selected to break down the object into smaller particles without delivering energy sufficient to cause damage to other tissue.

Calculi, stones, calcified tissue and other material are broken down for removal from within a body using laser pulses that are delivered via an optical fiber and have a wavelength, intensity, energy per pulse and pulse duration selected to break down the object into smaller particles without delivering energy sufficient to cause damage to other tissue.

PURPOSE:To achieve a higher reliability in the measurement of urine sugar, by assaying a factor affecting the urine sugar measurement in the measurement of urine sugar depending on the quantity of light received from a urine sugar test paper which has reacted with urine after immersed thereinto to inform of a deviation thereof from the normal range. CONSTITUTION:A urine sugar test paper 12, ascorb...

PNEUMATIC TIRE AND INNER LINER THEREFORE HAVING PUNCTURE SEALING CHARACTERISTICS There is provided a tubeless pneumatic tire having puncture sealing characteristics comprising as the inner liner a puncture sealing laminate having two outer halobutyl polymer containing layers and an inner butyl polymer containing layer, the laminate having been irradiated such that the inner layer has a Mooney (ML ...

A vehicle drive system includes a torque converter interconnecting an engine and a speed change gear and a flow brake is drivingly positioned between the torque converter and the speed change gear. A rotor of the flow brake is driven from a drive train which includes a torque converter turbine and the primary side of the speed change gear. During a braking cycle, the speed change gear is downshift...

An apparatus for atomization of high temperature melts to from very finely divided powder. The apparatus has a ceramic central melt delivery tube. Melt is introduced at the top and exits at the bottom. At the exit surface a high velocity gas impinges on the melt to atomize the melt into fine particles. The bottom portion of the melt delivery tube has an internal shape to expand the external config...

A method for aging an expansion-molded body of polyolefin prepared by heating pre-expanded polyolefin particles within a mold involves cooling the molded body within the mold so that the molded body is not substantially smaller than the volume of the mold cavity and is temporarily expandable after being removed from the mold to not more than 110% relative to the volume in the mold cavity, removing...

This invention describes a method of producing a silicone elastomer from an emulsion. When the ingredients are mixed together, the resulting latex can be used immediately. Removing the water from the latex results in a silicone elastomer. The method combines (A) an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, present as an emulsion of dispersed particles in water, the emulsion...

The device according to the invention realize the following steps: (a) recording of binary test words on an optical disc associated to distinct engraving optical powers and comprising monotonous series of "1" and "0" logic bits of equal duration; (b) reading of these words; (c) measurement of the durations of these bits in the "1" state and bits in the "0" state, (d) determination of the optical p...

A device and method are provided for determining, from a well, the orientation of fractures in a geological formation having a fracture zone. The device includes a tubular element connected to a hydraulic fluid source and having at least one flow orifice through which the fluid may escape. This device further includes: (a) at least one chamber through which the fluid may flow from the tubular elem...

A device and method are provided for determining, from a well, the orientation of fractures in a geological formation having a fracture zone. The device includes a tubular element connected to a hydraulic fluid source and having at least one flow orifice through which the fluid may escape. This device further includes: (a) at least one chamber through which the fluid may flow from the tubular elem...

DIFFERENTIAL LOCK CONTROL SYSTEM RESPONSIVE TO A PLURALITY OF VEHICLE PARAMETERS A differential lock control system includes an hydraulicallyoperated differential lock operated by a solenoid valve. Energization of the solenoid valve is controlled by a circuit which includes a normally open latching relay and seriesconnected switches which open and unlock the differential in response to sensed vehi...

DIFFERENTIAL LOCK CONTROL SYSTEM A differential lock control system controls a hydraulicallyoperated differential lock via a solenoid valve. Energization of the solenoid valve is controlled by a circuit which includes a normally closed latching relay, a normally open relay and a pair of operator-controlled momentary contact switches. The control circuit further includes a pair of steering valveope...

A multifilament yarn of an aromatic polyamide, in particular poly-p phenylene terephthalamide, is provided with an adhesive coating of a cured epoxy compound, the yarn having a free epoxide content not higher than 10 mmoles/kg. The yarn is made by spinning a solution of an aromatic polyamide into a coagulation bath and subjecting the resulting filaments to the subsequent steps of washing, applying...

L'invention concerne un procédé pour l'obtention de polymères acryliques hydrosolubles ou hydrophiles sous forme de flocons de faible dimensions à partir d'une plaque, feuille ou bloc de gel caoutchouteux. Ce procédé se caractérise en ce que l'on hache le gel dans un appareil à déchiqueter en présence d'un agent de conditionnement minéral ou organique, solide, particulaire, dans un rapport pondéra...

Apparatus for coating substrates by means of a reaction for depositing atoms or molecules which is initiated by a plasma. A reaction chamber (1) is equipped with at least one window (22, 23), penetrable by microwaves, with at least one wave-guide structure (16, 17), arranged outside the chamber (1) and in front of the window (22, 23), and with a distributing means (25) discharging into the chamber...

A thin film capacitor is formed of a thin crystalline electrically insulative or semiconductive substrate. With the insulative substrate a thin conductive metal layer is deposited on the substrate and a thin film of a crystalline strontium barium niobate deposited on the thin conductive metal layer so that its 2.77 ANGSTROM spaced atomic planes are oriented in a non-perpendicular manner to the su...

An X-ray apparatus having a hydraulically controlled counterweight. A flexible roll diaphragm seals each piston to each cylinder in the system.