摘要:
A disconnecting distribution frame for a small telephone extension system with a plurality of electrical terminals arranged in pairs, each pair of terminals being equipped with corresponding plug contacts and being electrically interconnectable by means of a coupling plug, is formed from one half of a conventional disconnecting distribution frame which is attached to the carrier of a subassembly rack having a guide strip for a printed circuit board. The other half of the disconnecting distribution frame is formed by plug contacts. These plug contacts are attached to the printed circuit board, which is inserted into the guide and correspond in height to the plug contacts on the carrier and are aligned with these. A coupler plug for making the electrical connection is attached to every two plug pins located opposite one another.
摘要:
What are disclosed are a method for making a pearl-like crosslinked hydrophilic carrier polymer, capable of binding proteins, by the inverse pearl polymerization of a monomer phase comprising a monomer mixture of a certain composition and a diluent therefor, also of a certain composition, said diluent comprising at least two components which can be chosen in nature and amount to optimize the protein binding capacity of the polymer, and pearl-like hydrophilic carrier polymers made by this method.
摘要:
Stabilized carrier-bound protein is prepared by reacting a protein in aqueous solution with a mercapto group free, water insoluble carrier which contains binding groups which are reactive with the said protein and reacting the resultant protein-containing mercapto group-free carrier with hydrogen sulfide or with a compound having a molecular weight of less than 5000, and which contains at least two mercapto groups, or at least one mercapto group and at least one hydroxy- group or primary or secondary amino group.
摘要:
A hose and pipe coupling is provided having a coupling head and a nozzle which can be inserted into the coupling head, and which is lockable therewith by a locking element. The locking element includes a spring-elastic ring having a slit and onto which are formed two oppositely-directed, arcuate spring arms which surround and embrace the coupling head. The coupling head has a slot-like circumferential opening and an internal annular groove for the partial reception of the spring-elastic ring and the nozzle at its coupling side is also provided with an annular groove for at least at partially receiving the spring-elastic ring in the inserted position of the nozzle. The coupling further includes a protective cap displaceably arranged on the coupling head and over the elastic ring after the nozzle and the coupling head are coupled together. The elastic ring includes a gripping knob formed at the outermost end of each of the spring arms thereof, and the protective cap is provided with radially-outwardly-protruding internal chambers for receiving the knobs. The protective cap also has formed therein an internal annular groove on an end portion thereof distal to the nozzle which is engageable with an annular shoulder provided in the coupling head.
摘要:
Industrial truck, in particular a lift truck, with a drive axle with drive wheels and a drive motor, a steering axle with two steerable wheels, a target value sensor that is connected to a steering wheel, a steering motor, a steering device which is in effective connection with a steering tie rod, a position transducer magnet whose position is recorded by two magnetic resonance sensors that are arranged in parallel, where the position transducer magnet and the resonance sensors are moved relative to each other during a steering movement of the steering device, and where the magnetic resonance sensors generate counter directional analog signals for the actual value of the steering angle of the steerable wheels, a steering control, connected to the target value sensor, the steering motor, and the magnetic resonance sensors, which evaluates the signals received from the target value sensor and the magnetic resonance sensors, and controls the vehicle steering angle to the target steering angle, where the signals of the magnetic resonance sensors are evaluated by the steering control for the recognition of malfunction of one of the magnetic resonance sensors.
摘要:
An automation system includes at least one device that detects measured values and is connected to a automated process, at least one field device connected to the at least one device detecting measured values, and a master computer connected to the at least one field device. In order to simplify the design of such an automation system as much as possible, the device detecting measured values, the field device, and the master computer are connected to a common data transmission network which is equipped for transmitting digital measured data from the device detecting measured values to the field device according to a first communication protocol and for transmitting digital control data between the field device and the master computer according to a second communication protocol.
摘要:
A tensioning device has an inner end plate mounted on a frame, a sleeve fixed to the end plate and extending along an axis toward an idler wheel over which is spanned a flexible endless element (e.g. a drive chain or conveyor belt), and an axially compressible stack of inner and outer spring rings. The stack is closely surrounded by the sleeve, forms an annular friction spring, and has one end bearing axially on the plate and an opposite end. An outer end plate bears axially toward the frame end plate on the opposite end of the annular friction spring, and a hydraulic unit is braced axially between the outer end plate and the idler wheel. The inner spring rings have substantially frustoconical outer surfaces and the outer spring rings have substantially frustoconical inner surfaces engaging the outer surfaces of the inner rings.
摘要:
A vertical reactor for catalytic exothermic and endothermic reactions, especially for the production of methanol, ammonia, synthesis gas and higher alcohols, with a jacket containing the catalyst bed and exchanger pipes which form a tube bundle running through the jacket parallel to its longitudinal axis, with a gas-permeable floor supporting the catalyst bed, as well as feed and discharge pipes for the cooling or heating medium running through the jacket lid and the jacket floor, said feed and discharge pipes, as well as feed and discharge pipes for the reaction gas, leading into horizontal distributing and collecting pipes wherein the upper and lower ends of the upright or essentially upright exchanger pipes of the tube bundle lead into horizontal supporting headers which are parallel to each other and arranged below and above the collecting and distributing pipes. The supporting headers are connected through intermediate ducts with the collecting or distributing pipes, which are arranged symmetrical to, or in the transverse center of, the support headers.
摘要:
Hydroxydiphenyls can be prepared by reacting diphenylsulphonic acids or their alkali metal salts with an alkali metal hydroxide at elevated temperature and elevated pressure, in the presence of water. For this purpose, the diphenylsulphonic acids or their alkali metal salts are reacted, at a temperature between 280.degree. and 330.degree. C. and a pressure of up to 120 bar, with an amount of aqueous alkali metal hydroxide having a concentration of at least 50% by weight, such that, after all acidic groups have been neutralized, 3 to 25 mols of alkali metal hydroxide per equivalent of sulphonate group are present in the reaction mixture. Mineral acids are added to the alkaline reaction mixture, after it has been cooled and diluted with water, until the pH value is less than 8, and the precipitated hydroxydiphenyl is isolated at a temperature from -5.degree. C. to +100.degree. C.
摘要:
A process for the preparation of an alkali metal salt of 3-hydroxybenzoic acid and the preparation of 3-hydroxybenzoic acid therefrom is disclosed wherein sulphophthalic acid or a salt thereof is reacted with an alkali metal hydroxide at a temperature in the range of 200.degree. to 300.degree. C. at a pressure of 10 to 30 bars.