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Brown, Boveri & Cie Aktiengesellschaft Patents
Assignee:
Brown, Boveri & Cie Aktiengesellschaft
Address:
Mannheim, DE
No. of patents:
40
Patents:












Patent Number Title Of Patent Date Issued
4864224 Measuring method for determining the difference between an A-C voltage and another voltage, as w September 5, 1989
A method for measuring the difference between two voltages with a time-controlled measuring cycle includes feeding two voltages with opposite polarity to one integrator, initially integrating up one of the voltages and subsequently integrating down the other of the voltages with the
4767685 Electrochemical storage cell August 30, 1988
Electrochemical storage cell based on sodium and sulfur with an anode space and a cathode space which are separated from each other by a solid electrolyte and are bounded at least in some places by a metallic housing, and a sulfur electrode formed of a fiber-like material impregnated wit
4710795 Semiconductor power module December 1, 1987
A semiconductor power module includes at least two mutually parallel ceramic substrates each having two sides, metallizations disposed on at least one side of each of the substrates, at least one controlled semiconductor power component disposed between each two respective substrates
4672415 Power thyristor on a substrate June 9, 1987
A power thyristor assembly, includes an insulating and metallized substrate, and a power thyristor having a cathode and gate side facing toward and soldered to the substrate, and an anode side facing away from the substrate, the anode side having an anode and a passivation ditch surr
4670678 Rotating rectifying device for the excitation of a synchronous machine June 2, 1987
Rotating rectifying device for excitation of a synchronous machine. The device includes an armature mounted on the machine shaft in a magnetic field with rotating coils connected to rectifier assemblies mounted on the inside flange surface of a support wheel, also mounted on the machine
4598005 Thermal insulation July 1, 1986
Thermal insulation with a double-walled housing, between the two housing walls of which an evacuated space is provided which contains at least one fiber-like insulating material which retards the heat flow between the two housing walls and is arranged perpendicularly to the temperature g
4591401 Process for the direct bonding of metal to ceramics May 27, 1986
In directly bonding a metal to ceramics, in accordance with the invention, that surface of a metal component which is to be bonded by heating to a ceramic substrate is provided with parallel-running grooves before the preoxidation. The grooves make it possible to optimize the quantity of
4587819 Method and circuit for flatness control in rolling mills May 13, 1986
A method for controlling flatness in cold-rolling mills having a roll stand with at least six rolls including intermediate and working rolls capable of being deflected, includes measuring tensile stress distribution over the width of a strip to be rolled having central and edge regions,
4578962 Cooling system for indirectly cooled superconducting magnets April 1, 1986
A cooling system for indirectly cooled superconducting magnets of a superconducting winding, includes a winding form having canals formed therein through which liquid helium flows, the canals including a lower feed canal, an upper collecting canal and mutually parallel cooling canals
4564568 Electrochemical storage cell January 14, 1986
Electrochemical storage cell based on alkali metal and chalcogen with an anodic space and a cathodic space which are separated from each other by an alkali ion-conducting solid electrolyte and are limited at least areawise by a metallic housing, and ceramic structural elements connected
4559854 Cutting apparatus for stock in the form of bars December 24, 1985
A cutting apparatus for heated stock in the form of metallic bars of finite length, includes a transport device for moving the bars back and forth in longitudinal direction of the bars along a transport path, a heating device upstream of the transport device along the transport path, a
4497879 Electrochemical storage cell February 5, 1985
Electrochemical storage cell of the alkali metal and chalcogen type with at least two electric terminals as well as at least one anode chamber and one cathode chamber which are both provided with at least one current collector and are separated from each other by an alkali-ion-conducting
4444970 Process for preparing polyacetylenes and substituted polyacetylenes produced thereby April 24, 1984
Substituted polyacetylenes are prepared by contacting a mixture of acetylene and a substituted acetylene with a polymerization catalyst. The substituents on the polyacetylene chains increase the distance between neighboring parallel chains and shield the chains from attack by oxygen,
4430129 Method of cleaning hollow conductors of cooled electrical machines February 7, 1984
For the chemical cleaning of cooled waveguides, in particular water-cooled waveguides of electric machines and apparatus, whose cooling cycle is maintained by a feed pump and comprises an ion exchanger in a closable bypass, alternately a complexing agent is added into the cooling cycle
4398128 Method and circuit arrangement for heating and igniting as well as controlling or regulating the August 9, 1983
Method for heating and igniting as well as controlling or regulating the light flux of low-pressure gas-discharge lamps, including a ballast having an inverter for generating an ac voltage at inverter output terminals from a dc voltage generated from an ac supply network by rectifiers, t
4368431 Electrochemical measuring device for determining the oxygen content in gases January 11, 1983
Electrochemical measuring device for determining the oxygen content in gases with approximately constant pressure, especially in combustion exhaust gases, with an oxygen ion-conducting solid electrolyte having two electrodes connected to a voltage source, and measuring changes in cur
4351620 Device for fastening built-in wiring devices September 28, 1982
Device for fastening built-in wiring equipment, the bottom of the wiring equipment having a fixed projection for engaging behind one L-shaped extension of an inverted hat-profile-shaped support channel, and a movable projection for snapping behind another L-shaped extension thereof,
4349773 Circuit for protecting storage cells September 14, 1982
Circuit for the uniform charging and discharging of electrochemical storage cells of the alkali metal and chalcogen type having a protective element in the circuit. The protective element is a container filled with a chemical compound which easily dissociates and easily recombines. The
4335392 Semiconductor device with at least two semiconductor elements June 15, 1982
Semiconductor device, including a housing having a surface, at least two semiconductor elements in the form of wafers at least one of which being controllable, electrodes for the semiconductor elements being insulated and passivated at the rims thereof and being electrically connected to
4303877 Circuit for protecting storage cells December 1, 1981
Battery formed of electrochemical storage cells of the alkali metal and chalcogen type in series or groups of several parallel-connected storage cells connected in series. To assure uniform charging and discharging of the storage cells, each series-connected cell or each group of par
4302767 Controlled power-semiconductor component having an annular cage November 24, 1981
Controlled power semiconductor component, having a disc-shaped silicon body with a surface on each side thereof, two insulated ductile electrodes each having surfaces on each side thereof, one of the surfaces of each of the ductile electrodes being in pressure contact with one of the sur
4273810 Method for preventing sintering in forging blocks June 16, 1981
Preventing work pieces of iron or iron alloys in the form of a line of blocks which are pushed through an induction coil and heated to a forging temperature from sticking together. The surfaces of blocks which touch are subjected to an elevated temperature of heating and pressure due to
4263573 Thermal switch with a vitreous metal alloy switching element April 21, 1981
Thermal switch, including a switching element formed of a coherently structured vitreous metal alloy. The switching element being in a vitreous-amorphous state and having a higher strength at a lower first temperature range, and in a crystalline state and having a lower strength at a
4263542 Method and circuit arrangement for controlling an asynchronous motor supplied from a static freq April 21, 1981
Method for controlling the speed and torque of an asynchronous machine fed through a static frequency changer with impressed intermediate current link, a control variable for the frequency of the current delivered by the frequency changer being formed from an electrical variable correspo
4263339 Process for the production of electroluminescent powders for display panels April 21, 1981
A process is provided for producing electroluminescent powders for use in information display panels of the type in which a monoparticle layer of electroluminescent powder is embedded in a high dielectric constant resin between two electrodes. The powders are zinc sulfide powders coactiv
4239837 Electrochemical storage cell December 16, 1980
An electrochemical storage cell or battery with an anode space for an alkali metal as the anolyte and with a cathode space for a sulfur-containing catholyte substance, which are separated from each other by an alkali-ion-conducting solid electrolyte and are confined by a cell wall of
4238553 Electrochemical storage cell December 9, 1980
Electrochemical storage cell or battery of the alkali metal and sulfur type operable in the range from about 100.degree. C. to 200.degree. C. A solvent component is added to the cathode chamber, which solvent will at least partially dissolve sulfur and is stable under the conditions of
4235956 Electrochemical storage battery November 25, 1980
Electrochemical storage battery normally operating at an elevated temperature, surrounded by heat insulation to retard heat loss. The surrounding heat insulation is an enclosed gastight cavity under subatmospheric pressure to impede heat flow by convection, and a radiation shield in
4233142 Electrochemical measuring cell November 11, 1980
An electrochemical measuring cell for determining the oxygen content in exhaust gases from internal-combustion engines and combustions having an ion-conducting solid electrolyte with a measuring electrode as a first layer on the solid electrolyte and a reference electrode as a second lay
4228491 Control method for a three-phase self-excited inverter October 14, 1980
A control method for a three-phase self-excited inverter which is fed from a dc voltage source and in which the fundamental oscillation of the output voltage is adjustable in frequency and amplitude, in particular by the subharmonic method, and wherein the pulsing or timing is always don
4200907 Method of taking a pole of a high-voltage d-c transmission station out of service April 29, 1980
Method of taking a pole of high-voltage d-c transmission system (HVDCTS) out of service, having a rectifier station connected to a first three-phase network and an inverter station connected to a second three-phase network, two d-c lines connected from one station to the other, each
4181753 Process for the production of electroluminescent powders for display panels and coating the powd January 1, 1980
A process is provided for producing electroluminescent powders for use in information display panels of the type in which a monoparticle layer of electroluminescent powder is embedded in a high dielectric constant resin between two electrodes. The powders are zinc sulfide powders coactiv
4174497 Circuit and method for controlling reactive load currents of a three-phase system November 13, 1979
Circuit for controlling reactive currents of a three-phase network, having three converters with forced commutation connected in parallel with the loads of the three-phase network, at least one energy accumulator connected to the d-c side of the converter, and a closed control loop h
4166193 Insulators with increased surface conductivity and method for increasing the conductivity on sur August 28, 1979
A solid insulator having high electrical resistance of inorganic and organic materials such as ceramic, glass, plastics, resins which is treated by application of an ion beam to the insulator surface to effect incorporation by controlled implantation of ions in the insulator adjacent
4143297 Information display panel with zinc sulfide powder electroluminescent layers March 6, 1979
Electroluminescent information display panels are disclosed suitable for uses extending from simple numeric displays to color TV panels. The new panel consists of an unpatterned layer of electroluminescent powder particles of thickness equal to that of one particle embedded in a high
4135134 Electric wiring switch, especially a line protection switch with a fault-current circuit breaker January 16, 1979
An electric wiring switch having an electromagnetic open-circuit shunt tripping device with a magnet armature that, when the tripping device is tripped, acts upon a latching shaft to release a latch upon the ocurrence of a fault current in an electrical circuit wherein the switch is
4090058 Conductive heating device May 16, 1978
In apparatus for resistance-heating elongated workpieces by direct passage of current therethrough, a device for displacing the elongated workpieces longitudinally into and out of the apparatus includes rail means providing a transporting surface into and out of the apparatus, electrode
4079620 Method and apparatus for locating defective fuel rods of a reactor fuel element March 21, 1978
A method and apparatus for locating defective fuel rods of a liquid cooled reactor core wherein the rods have end caps and defective rods collect leakage liquid from the core in the end caps, includes heating the end caps of a plurality of rods to evaporate the leakage liquid, measuring
4062349 Method for the controlled heating of a liquid reservoir, and reservoir system for carrying out t December 13, 1977
Method for the controlled heating of a liquid reservoir by a heat source of varying temperature wherein the heat from the heat source is fed through a heat carrier circuit to the reservoir into a region of a heating zone thereof which extends over part of the height of the reservoir and
3944715 Induction crucible furnace March 16, 1976
An induction crucible furnace having a crucible surrounded by an induction coil member that is prestressed in axial direction by ring members disposed at opposite ends of the coil member and connected together by a plurality of tie rods extending parallel to the axis of the coil member

 
 
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