Abstract: A ferrite composite circulator according to the present invention performs various circulator actions with ferrite composites in which resonant TM modes and relevant circulating modes are utilized in multiple. Circulator performances are categorized into broadband operation, frequency dividing operation, and others, from the viewpoint of multiple circulation frequency operation. These operations have a common basis on the finding of multiple circulation frequency operation which has been achieved with a ferrite-dielectric composite circulator. Three types of ferrite composites used are a ferrite-conductor composite, a ferrite-dielectric-conductor composite, and a ferrite-ferrite composite.

Abstract: An internal combustion engine fuel ignition system has feedback from an exhaust gas composition transducer which operates effectively only at normal exhaust temperatures, the transducer having a very high impedance at low temperatures. The feedback circuit includes a comparator stage and an integrator stage integrating the output of the comparator stage which compares the transducer output with a reference voltage. A feedback resistor is connected from the integrator stage output to the comparator stage input, so that, at low temperature the integrator stage output stabilises at a predetermined level. Only when the transducer warms up so that its impedance becomes significantly less than that of the feedback resistor does the exhaust feedback control loop become effective.

Abstract: The invention relates to a fluid flow control valve of the type in which flow through the valve is controlled by movement of a chamber wall caused by fluid flowing into the chamber through a restricted inlet and a cleaning element is provided to clean the inlet. In this invention, the cleaning element is longer than the restricted inlet and is movable between a first position in which it does not extend through the restricted inlet and a second position in which it extends completely through the restricted inlet. The cleaning element is a rod-like element of self-supporting flexible synthetic plastics material and has a limited inherent rigidity enabling it to force dirt and scale from the restricted inlet.

Abstract: A method for the production of heat comprises composting solid organic waste, preferably in admixture with sewage sludge, and burning the composted waste, for example in a kiln for calcining an inorganic calcinable material. The composted waste preferably has a water content of less than 20% by weight, more preferably from 10 to 20% by weight. The organic waste is preferably composted in a rotating drum preferably for an average residence time of from 12 to 48 hours. The invention also provides a method for producing a fuel by composting a solid organic waste as described above and the fuel produced thereby. The composting is suitably carried out in a rotating drum having festoon chains arranged therein to serve as mixing lifters or flights.

Abstract: A safety valve for gas pipes preventing backflow in the closed position is described. Simultaneously any possible leakage from the line is vented. The line to be closed terminates with two adjacent ends in a fixed plate having corresponding openings. Opposite the plate a rotatably mounted plate is arranged. This rotatable plate carries a 180.degree. pipe bend the openings of which correspond with the respective openings in the fixed plate. Sealing means are arranged between the two plates, sealing around the line end openings in the closed as well as the open position of the 180.degree. pipe bend.

Abstract: A brake pad wear detection system comprises a brake having a brake pad and a conductive braking face, the brake pad and the conductive braking face engaging during braking. A sensor loop is embedded in the brake pad and positioned to be broken when the wear to the brake pad exceeds the working limit. An indicator means and a detecting means for operating the indicator means are provided, the detecting means detecting contact between the sensor loop and the braking face as well as breakage of the sensor loop.

Abstract: A new method of preparing a fire-resistant sheet formed product is disclosed involving the following steps: (1) grinding together a particulate inorganic material selected from the group consisting of crystallized blistered glass, crushed cement clinkers and crushed blast furnace slags, a hydraulic binder and from 10 to 2% by weight of an organic thermosetting binder in a ball mill until the particulate inorganic material has sufficiently disintegrated and the particulate inorganic material, the hydraulic binder, and the organic thermosetting binder are homogeneously distributed to form a dry mixture of particles; (2) subjecting the dry mixture of particles to heat treatment, under pressure, to consolidate and bond the dry particles into a unitary structure to form a sheet; and (3) after release of pressure, treating the sheet with water to set and cure the hydraulic binder.

Abstract: This invention relates to a single-lens mirror reflex camera for studio purposes, with which the exposure-determining film exposure, within a prescribed opening time of the shutter, is effected during the duration of a flashlight initiated by the camera. A shutter cap is provided which is formed as a swivellable, light-tight return swinging mirror. Such cap is fixed on a driveable shaft, and is held by means of a return spring in the rest position completing the optical system of the viewfinder. The cap also carries at least one contact element of a control switch for the flashlight, of which the coacting contact is arranged on a stop limiting the open position.

Abstract: Soil testing apparatus comprising two dialytic tubes, one of the tubes containing a dialyzable solution containing H-ions and the other tube containing a dialyzable solution containing carbonate (CO.sub.3)ions. The invention also concerns a method of testing a soil sample using such an apparatus.

Abstract: A timber processing machine comprising a hollow rotor provided with barking and lopping knives. A tree trunk to be processed is fed longitudinally through the rotor. A non-rotable guide ring is coaxially fastened to the rotor at the inlet side of the knives. The front edge of the knives is sharpened along that portion of the knives which extends radially inside the guide ring. Said guide ring forces the branches of the tree trunk fed into the rotor to be bent into positions in parallel with the tree trunk and the knives cut the bent branches into pieces as the trunk is fed through the rotor.

Abstract: An applicator for attachment of ear tags to animals. The device incorporates a slotted base to which is affixed, at 90.degree., an elongate guide. A first handle extends from that end of the base opposite the slotted portion thereof and a second handle is pivoted to move from an open to a closed position in a plane through the first handle normal to the plane of the base. A tag carrying spear is movable from a rest position adjacent the guide member and normal to the plane of the base through a path of travel including a first downstroke in a direction normal to the base. At the end of the downstroke the tag anchor portion is wholly through the ear of an animal, which ear is retained adjacent the base during a tagging operation. The spear may then pivot through an arc through the slotted base while being withdrawn from the tagged ear.

Abstract: New compounds of the nitrofuran series are provided, having the following general base formula: ##STR1## where R=CH.sub.2 CH.sub.2 CH.sub.2 OH; --CH(CH.sub.3)(CH.sub.2).sub.3 N(C.sub.2 H.sub.5).sub.2n=1,2and which may be in the form of salts.These compounds, both in the form of base and salt, exhibit a contact-action antiblastic effect. The advantage of these compounds resides in high selectivity of their action on tumoral cells combined with a germicidal activity.These compounds may be used in the medicine as an active source of antiblastic preparations.

Abstract: Process for extraction and separation of metals utilizing the advantages of liquid-liquid extraction with cation exchangers without requiring the equivalent addition of alkali. The process is based on a combination of leaching the metal-containing raw materials with an organic acid (cation exchanger) and a subsequent use of the formed metal cationic complex in a liquid-liquid extraction process. In the said extraction process, the organic solution of metal complexes is used to recover and separate metal ions from an aqueous solution of metal salts.

Abstract: A circuit for providing saw-tooth current, with a trace and a retrace interval, in a coil, in particular a deflection coil of a television kinescope, in which the coil is connected to a retrace condenser and a trace condenser so as to form a deflection circuit which oscillates freely during the retrace interval, is described. In this circuit, a first diode is connected parallel to the deflection circuit with such polarity as to be made conductive by the saw-tooth current during the first part of the trace interval, and the said deflection circuit is also connected parallel, by means of a second diode having such polarity as to be made conductive by the saw-tooth current during a second part of the trace interval, to a controllable switch, which is made conductive during part of the trace interval.

Abstract: A lead-acid battery capable of activation by the addition of electrolyte thereto includes at least one pack of formed positive and negative battery plates with insulating separators being interposed between adjacent plates. Part of the sulphuric acid used to form the plates is retained by the battery and has a specific gravity between 1.25 and 1.35, the amount of the retained acid being insufficient to electrically connect the plates during storage. In addition means is provided to seal the battery against ingress of air but allow gases generated in the battery to escape.

Abstract: The subject of the invention is a continuous filtering-settling centrifuge designed for separating continuously mixtures containing solid and liquid bodies.In the centrifuge several filtering or settling baskets are applied, situated beyond the main axis of spinning, and rotating around their own axes at an angular velocity different from the angular velocity of the centrifuge. In the particular filtering or settling baskets there is applied a system of feeding the mixture to be centrifuged, constituting a separated feeding zone, and a discharge system constituting a separate discharge zone with a chute receiver or a worm receiver. Besides, in the particular baskets there are separated zones of centrifuging, washing the solid part with a liquid, steaming of the solid part, separating of the washing agent or steaming agent, drying of the solid part, and washing of filtering screens with appropriate technical means in the particular zones. In the baskets finned partitions are applied.

Abstract: Fire and explosion detection apparatus comprises an ultra violet detector providing a first output signal in response to receipt of ultra violet radiation and an infra red detector providing a second output signal in response to receipt of infra red radiation. A logical AND circuit, in response to simultaneously occurring first and second output signals, provides a third output signal indicative of simultaneous receipt of ultra violet and infra red radiation.