A method for the gaseous reduction of particulate ores to metals in a moving bed, vertical shaft reactor using a reducing gas externally supplied from a solid or liquid fossil fuel gasification unit. The reducing gas is reformed in a reforming zone located within the reactor and treated prior to injection into the reduction zone of the reactor. A portion of the reducing gas produced in a coal gasi...

In a double clutch transmission, especially for a motor vehicle, it is necessary for the completely satisfactory shifting sequence to engage and disengage the clutches alternately; in order that such a sequence is assured, differential pressure switches are provided which include a signalling device that indicates end positions of the clutches to an electronic control installation for evaluation p...

PURPOSE:To provide a titled wire rod adapted to use in a superfluid He temp. region by consisting the same of a specific alloy composed of V, Ti, Ta. CONSTITUTION:An alloy composed of 58-20atom% V, 40-78atom% Ti, and 2- 20atom% Ta is subjected to >=1 times of heat treatment at about 200-600 deg.C and to about >=50% cold working after the final heat treatment in the midway of cold working the same ...

Security strips containing magnetizable components, which are used, for example, to safeguard articles in stores, are manufactured by first applying to a continuous carrier band (11) which is moved progressively in fixed cycles and which has a double-sided adhesive film (11 min ), strip sections or elements (13 min ) of a hard magnetic material which are spaced equally and which are fed from suppl...

PURPOSE:To perform single or composite action control of a boom and an arm and horizontally directed delivery control of a bucket by switching the arm cylinder and boom cylinder of an excavator in an intermittent manner. CONSTITUTION:A boom 22 rotatably attached to the front of a rotator 20 is supported by a boom cylinder 23 and moved in a rocking manner. A bucket 27 is rotatably attached to the t...

Embodiments include flying "catamaran" heads with "TSF" rail-faces, consisting of a flat-taper segment and an adjoining "spherical-flat" segment, adapted to eliminate "pinch-off" instability and the like when flown on opposing sides of a flexible medium.

In the production of silicon or silicon-alloy bodies in which a shaped pre-form, blank or like member containing a silicon carrier and carbon is subjected to an electric furnace, the fine-grain silicon carrier intimately mixed with preferably a stoichiometric amount of caking coal and the mixture is molded to form the body which is subjected to hot briquetting at a temperature of 350 DEG to 550 D...

A dialysis probe, primarily intended for insertion in biological tissues, for example brain tissue, comprises a dialysis membrane and ducts for flow of the perfusion fluid over the membrane. The dialysis membrane in such a probe can be surrounded by a mounting which supports and partially reveals the membrane, and which is more rigid than the membrane.

A dialysis probe, primarily intended for insertion in biological tissues, for example brain tissue, comprises a dialysis membrane and ducts for flow of the perfusion fluid over the membrane. The dialysis membrane in such a probe can be surrounded by a mounting which supports and partially reveals the membrane, and which is more rigid than the membrane.

PURPOSE:To prevent the deterioration of a ternary catalyst by closing and opening a solenoid valve for supplying secondary air to the upper stream of the ternary catalyst at the frequency of 1-2Hz, periodically varying an air-fuel ratio within the range of + or -0.2-+ or -1.0, and closing the solenoid valve when an engine load exceeds a prescribed value over a prescribed period of time. CONSTITUTI...

PURPOSE:To prevent the deterioration of a ternary catalyst due to overheating by opening and closing a solenoid valve for supplying secondary air to the upper stream of a ternary catalyst at the frequency of 1-2Hz, periodically varying an air-fuel ratio within the range of + or -0.2-+ or -1.0, and closing the solenoid valve when an engine load exceeds a prescribed value. CONSTITUTION:A secondary a...

PURPOSE:To improve an exhaust air purification characteristic during the stationary operation of an engine by opening and closing a solenoid valve for supplying secondary air to the upper stream of a ternary catalyst at the frequency of 1-2Hz, periodically varying an air-fuel ratio within the range of + or -0.2- + or -1.0, and fully opening the solenoid valve during the engine steady operation. CO...

PURPOSE:To improve the purification efficiency of a ternary catalyst by closing and opening a solenoid valve for supplying secondary air to the upper stream of the ternary catalyst at the frequency of 1-2Hz, periodically varying an air-fuel ratio within the range of + or -0.2-+ or -0.1, and extending the closing time when an engine load exceeds a prescribed value. CONSTITUTION:A secondary air supp...

PURPOSE:To prevent after-burning by opening and closing a solenoid valve for supplying secondary air to the upper stream of a ternary catalyst at the frequency of 1-2Hz, periodically varying an air-fuel ratio within the range of + or -0.2- + or -1.0, and fully opening the solenoid valve after temporarily fully closing said valve at engine deceleration. CONSTITUTION:A secondary air supplying hole 6...

PURPOSE:To prevent a catalyst from being overheated and deteriorated in an early stage by providing a means for detecting an engine operating state and its overheated state, and stopping secondary air supply to the exhaust system catalyst during overheating excepting engine deceleration. CONSTITUTION:A catalyst 1 is provided in an exhaust system 2, a secondary air supplying device comprising an ai...

PURPOSE:To improve an exhaust gas purification characteristic without yielding any fluctuation of combustion by opening and closing a solenoid valve for supplying secondary air to the upper stream of a ternary catalyst within the frequency range of 1-2Hz, and periodically varying an air-fuel ratio within the range of + or -0.2-+ or -1.0 taking a theoretical air-fuel ratio as a center. CONSTITUTION...

PURPOSE:To improve an exhaust gas purifying characteristic while fully opening a solenoid valve at an idling operation by opening and closing the solenoid valve for supplying secondary air to the upper stream of a ternary catalyst within the frequency range of 1-2Hz, and periodically varying an oil-fuel ratio within the range of + or -0.2-+ or -1.0. CONSTITUTION:A secondary air supplying hole 60 i...

A dialysis probe, primarily intended for insertion in biological tissues, for example brain tissue, comprises a dialysis membrane and ducts for flow of the perfusion fluid over the membrane. The dialysis membrane in such a probe can be surrounded by a mounting which supports and partially reveals the membrane, and which is more rigid than the membrane.