Abstract: The invention concerns an electrolyzer power supply, especially for use in the industrial production of hydrogen. It is constituted by four sub-assemblies placed side-by-side in a filter-press type structure. These sub-assemblies each comprise electrodes coupled two by two, electrolytic compartments being defined between two groups of electrodes. One group of these electrodes, preferably half of them being made of a metal that has a rectifying effect on AC current, and preferably being aluminum, aluminum-zinc alloys, niobium or tantalum. The counter-electrodes are adapted to evolve oxygen. They are preferably iron, nickel or carbon. A generator providing an alternating current is connected between the end electrodes and between the second and third sub-assemblies. DC is taken from between the first and second and from between the third and fourth sub-assemblies.

Abstract: Compositions for the prevention of pyorrhea alveolaris containing a fructan-degrading enzyme at a ratio ranging from 1 to 300 activity units per g. or ml. of the composition.

Abstract: In a security communication system, the transmitting unit includes a sample - hold circuit for sampling and holding the original voice signal, an inverting circuit for inverting the polarity of the samples of the voice signal in accordance with a first code, an adder circuit for adding a D.C. signal to the output signal of the inverting circuit, and another inverting circuit for inverting the polarity of the samples of the output signal of the adder circuit in accordance with a second code. The receiving unit includes a sample - hold circuit for sampling and holding the received signal, a synchronizing circuit for extracting a synchronizing signal component from a received signal during, for example a period of non-voice transmission, and for synchronizing the transmitting unit with the receiving unit, an inverting circuit for inverting the polarity of the samples of the received signal in accordance with the second code, a circuit for removing a D.C.

Abstract: An electronic cash register comprises a read only memory, a central processor unit, entry and function keys, memory means including an entry memory storing input data from said entry keys and first and second data memories storing respectively first and second data, a double function key for transferring first data to the first data memory and second data to the second data memory, and printing means for printing input data, price total and further the first and second data. The memory means further comprises a first flag memory storing a "1" when the entry memory stores the first data and a second flag memory storing a "1" when first data is transferred from the entry memory to the first data memory. When the double function key is operated while first data is stored in the entry memory and a "1" is stored only in the first flag memory, the first data is transferred to the first data memory and the second flag memory now stores a "1". The entry and first flag memories are then cleared.

Abstract: The invention is to drive an article into an object or extract it therefrom by means of strain energy.The article is provided at its top with an elastic part having a reaction material for giving a tensile strain or a compressive strain to the elastic part via the reaction material in order to accumulate the strain energy in the elastic part.For carrying out the driving operation, the strain energy is abruptly released from the top of the elastic part, otherwise the compressive strain is abruptly released from the bottom of the elastic part. The strain energy is transformed into a kinetic energy and the article is struck on its head by this kinetic energy so that a compressive strain wave is generated in the article being driven.For carrying out the extracting operation, the compressive strain is abruptly released from the top of the elastic part, otherwise the tensile strain is abruptly released from the bottom of the elastic part.

Abstract: An electronic weight measuring device comprises a load cell to produce a voltage signal corresponding to the weight of load applied, an amplifier circuit for amplifying the output signal of the load cell, an A/D converter circuit for converting the output signal of the amplifier circuit into a digital signal, a counter for counting the number of clock pulses corresponding to the output signal of the A/D converter circuit, a microcomputer for deriving a weight indicating signal from the count output signal of the counter, and a display unit for displaying the weight indicating signal from the microcomputer.

Abstract: A rock bolting apparatus is shown in which a rock drill and a rock bolt setting device are interchangeable on the same elongated guide of a feed beam. When the rock drill is in operative position on the feed beam, the bolt setting device hangs on the side of the feed beam and vice versa.

Abstract: To provide rapid, external heating of a solid electrolyte body exposed to gases, the solid electrolyte is applied, for example by plasma spraying, to a disk-like metallic carrier plate which has an insulated coating thereover, in which the carrier plate is formed with openings throughout its circumference leaving connecting strips between the openings. Heating current conductors are connected at locations opposite the openings so that the connecting strips will form resistance paths heating the electrolyte body on the plate. A catalytically inactive electrode is applied to the electrolyte at one side of the plate, and a catalytically active coating is applied to the electrolyte at the other side of the plate.

Abstract: The motor is serially connected with a diode and a sensing resistor so that half waves of one polarity, for example negative, can flow through the motor and provide, across the resistor, a voltage drop corresponding to loading placed on the motor. A thyristor is connected in parallel to the diode and reversely poled to conduct the other half wave, then the positive, if triggered. Triggering of the thyristor is controlled by the voltage drop across the sensing resistor so that, under no-load conditions, only the negative half waves will be applied to the motor, thus limiting its no-load speed but, as loading is placed thereon, increasing portions of the positive half waves are likewise passed through the motor.

Abstract: Base stocks for lubricating oil with excellent thermal stability are produced by hydrofinishing a mixture consisting of 10 to 60 percent by volume of a neutralized extract and 90 to 40 percent by volume of an unextracted intermediate distillate product of low total acid value, in which the neutralized extract is prepared by alkaline treating and vacuum distillation of a extract obtained by solvent extraction of said intermediate distillate product by a solvent having affinity for aromatic compounds.

Abstract: Sluice gate members mounted for swinging movement about a shaft offset from the center of a furnace and arranged to be moved both gradually and discontinuously are interposed between an upper pyrolysis and precombustion chamber and a lower afterburning chamber. The movement of these sluice gate members causes particles of the fire bed supported on them to drop down into the afterburning chamber, largely in the form of embers, at about the same rate as additional waste material is added to the fire bed, so as to maintain a fire bed of approximately constant size. The sluice gate members are hollow and secondary air is blown into them near the shafts on which they are mounted and flows out through holes on their bottom surfaces and in their facing tip edges and then proceeds downward to contribute to the afterburning process.

Abstract: A flip-flop circuit includes first, second, third and fourth NAND gates each with first and second output terminals. The first output terminal of the first NAND gate C and the first output terminal of the third NAND gate are connected to the input terminals of the second and fourth NAND gates, respectively. The first output terminals of the second and fourth NAND gates are connected to the input terminals of the first and third NAND gates, respectively. The second output terminals of the first and second NAND gates are connected to the input terminals of the third and fourth NAND gates, respectively. The second output terminal of the fourth NAND gate is coupled with the input terminal of the first NAND gate. A first diode is inserted between the input terminals of the first and second NAND gates and second diode is inserted between the third and fourth NAND gates.

Abstract: An electro-chemical sensor to determine the oxygen content of exhaust gases, particularly from internal combustion engines. The sensor contains a tubular solid electrolyte closed at one end having a catalytically active layer on the outside to be exposed to the exhaust gas. The inside of said solid electrolyte tube is exposed to the ambient air and is provided with a contact portion arranged at the bottom of said solid electrolyte tube. The sensor contains an elongated axial center electrode which is pressured against the bottom (closed end) of the inside of the tubular solid electrolyte, preferably by means of a compression spring which may be mounted internal of said center electrode or external thereof. The central electrode comprises an insulating body having a heating element in the area which will be adjacent the portion of the solid electrolyte in contact with the exhaust gases. Additionally the central electrode also carries an electric lead to said contact portion.

Abstract: The invention provides jets, nozzles, and perforated base plates produced from alloys that consist essentially of 40-70% platinum, 20-50% palladium, 5-15% rhodium, and 0.5-4% gold. They are resistant to attack by molten glass, particularly glass containing silicates.

Abstract: A hot fluid-conducting pipe assembly, comprising an inner metal pipe through which flows a hot fluid,Support pins regularly arranged on and outwardly projecting from the outer surface of the inner metal pipe,Refractory of said coupling members fixed to the inner metal pipe by the support pins, each coupling members having upper and lower faces concentric with the surface of the inner metal pipe, trapezoidal side faces in the longitudinal direction of the inner metal pipe, and sectorial side faces in the circumferential direction of the inner metal pipe,Heat-insulating refractory blocks mounted between the coupling members and each having an underside portion provided with a cushioning layer formed of an elastic refractory material,A heat-insulating layer formed of an elastic refractory material and uniformly covering the upper faces of the coupling members and of the heat-insulating blocks, andAn outer metal pipe covering the heat-insulating layer.

Abstract: A method for sewing together fabric pieces which comprises the steps of sewing elastic cord-like core material such as polyethylene cord along the edge portions of two or more fabric pieces, automatically engaging the edge portions of the fabric pieces with each other by guiding the sewn core material, and sewing together the engaged edge portions to render an assembly of fabric pieces adapted for use as a cover; and a machine for sewing together fabric pieces which is provided with a core material-guiding mechanism for clamping core materials previously sewn to the edge portions of two or more fabric pieces being sewn together, thereby engaging the edge portions with each other.

Abstract: To improve smoothness of tape transport in a spiral path over a guide cylinder, the guide rollers located immediately adjacent the guide cylinder, and journalled to rotate about an axis inclined with respect to the axis of the guide cylinder, can rotate about respective axes of rotation which are variable with respect to the axis of inclination defined by the bearing means journalling the guide rollers to permit self-balancing and self-adjustment of the spiral path of the tape about the cylinder during operation of the apparatus in dependence on the forces applied by the tape on the immediately adjacent rollers. Variation of the axis of rotation can be obtained by providing a central bearing for the roller about its axis of rotation, the bearing having a slight amount of play, and being offset with respect to the center of the tape passing around the roller to direct the edge of the tape against a guide surface and provide a fixed bias force on the bearing.

Abstract: To provide an inexpensive assembly of a brush-holder and brush to engage the slip rings of an automotive-type alternator, particularly for low-cost, high-quantity mass production, a brush carrier arm, for example of leaf spring or circular spring material, is directly connected to hold a brush at one end thereof, for example by clamping the brush, securing it in a socket, or carrying an insulated brush-holder plate to which the brushes themselves are attached, the brush-holder arm being secured to a base which may be integral with, or form the cover of a housing for an electronic voltage regulator, so that the brush-holder itself will provide the spring engagement force for reliable electrical contact while permitting functioning also as an electrical connection and permitting inexpensive manufacture.

Abstract: A method for preparing oxide piezoelectric material wafers from a rhombohedral single crystal of an oxide piezoelectric material as-grown cylindrically in the X-axis direction includes linearly rubbing-off at least one side portion of such as-grown cylindrical single crystal facing to a specified direction along the longitudinal direction of such single crystal before cutting X-cut wafers from such single crystal thereby to provide a corresponding flat portion.

Abstract: To permit visible inspection of the package contents and also insertion of an information or advertising leaflet, a block or plate-like carrier body with a flat surface is formed with a recess in which the tape cassette or cartridge is placed, leaving a substantial surface area around the cassette, the information or advertising leaflet being shaped to fit the remaining surface area, leaving the cassette itself uncovered. A transparent cover is placed over the assembly, with the edge of the cassette or cartridge exposed for visual inspection.