In a method for enriching ores or like materials the components of which have simultaneously different contents and mechanical strength values, the ore is submitted to a controlled crushing causing the softer fraction of the ore to be ground to a predetermined particle size controlled by discharging the softer component as it is reduced to the predetermined particle size. The predetermined particle size is determined experimentally and is dependent on the differential friability of the material …

Permanent magnet material having a high coercive force and a high residual flux density is constituted by an alloy of cerium (15 to 20 mol percent), cobalt (52 to 77 mol percent) and copper (8 to 30 mol percent). The cerium can be replaced by Ce-mischmetal in an amount providing the equivalent quantity of cerium. The material has a novel microstructure. The material can be prepared by melting together the ingredient materials and furnace-cooling to room temperature. Superior results are obtained…

A sleeve is composed of a relatively thin inner layer made of such highly infusible material as molybdenum, tungsten or their alloys, and an outer layer made of an iron-base alloy. For manufacture, a mixture of powders compounded to form an iron-base alloy when heated is compacted to cylindrical shape around a hollow cylinder suitably molded of one of the listed metals and alloys. The compact is then sintered to provide an outer layer of the iron-base alloy solidly united with the hollow cylinde…

The subject of this invention is an element having bimetal properties and made of a composite fiber material comprising a matrix material and at least one group of fibers embedded therein. The bimetal properties may be achieved by using a matrix material having a coefficient of thermal expansion differing from that of at least one group of embedded fibers. Alternatively, the coefficients of thermal expansion of at least two groups of embedded fibers may differ from each other to achieve such pro…

A container for a liquid melt has a nozzle with a flow passage. A refractory ceramic material supports the nozzle and an insert of highly wear resistant refractory material limits the flow passage of the nozzle. The insert comprises a shield body or bodies of oxide ceramic or cermet having a thickness of 5% to 20% of the diameter of the flow passage. The flow passage of the shield body is the same or less than the flow passage of the nozzle.

Synthetic fibers for artificial hair are provided which have a bending rigidity EI of 2 – 9.5 dyne. cm.sup.2, a drape index Y of 0.04 .times. 10.sup..sup.-5 – 0.24 .times. 10.sup..sup.-5 cm.sup..sup.-3 and a product value of EI times Y of 0.28 .times. 10.sup..sup.-5 – 1.8 .times. 10.sup..sup.-5. Such fibers have good esthetic appearance and handle as well as excellent hair – like feel and visual pliability.

Azachromone-2-carboxylic acids, processes for their preparation, pharmaceutically acceptable derivatives thereof and compositions containing them. The compounds of the invention are indicated for use in inhibiting the effects of antibody-antigen reactions. 8 Claims, No Drawings

A tube bending device for bending tubes of a circular cross-section includes a frame element and a pulley provided with a groove which is firmly attached to the frame element. A steering element for steering the tube during bending has a lever arm which is connected to the steering element and the pulley via a first joint and a second joint. A number of lamellas are arranged in a flexible chain configuration and are linkably but not firmly connected to each other and also provided with grooves. …

A method of igniting a burner in a short period of time. An igniting device is used which has a heating element made of carborundum provided in an outer pipe which is provided movably in the burner. An electric source initially impresses upon the heating element a voltage approximately 1.5 times its rated voltage and the electric current at the secondary side of the transformer at the time when the heating element has reached the desired temperature is detected by a current relay. At this time, …

An insecticidal incense device. The device has a semi-non-flammable sheet member having a body of fumous burnable material coated and adhered thereon in a continuous line. The fumous burnable material has a fumous insecticidal material therein. When the fumous burnable material is burned, the portion of the sheet member beneath the fumous burnable material supports the combustion of the fumous material while the remainder of the sheet does not burn.