A semiconductive rubber foam having a volume resistivity that can be controlled to a practical level and retaining an initial softness even after the lapse of time, is obtained by foaming and curing a rubber composition comprising 100 parts by weight of a chlorinated ethylene/ alpha -olefin copolymer rubber and 10 to 50 parts by weight of carbon black. The volume resistivity of this semiconductive...

A multi-layer diamond film (14) is grown by d.c. arc assisted plasma deposition. A series of layers (18) are deposited on each other by periodically back-etching the surface and renucleating during deposition. There may also be deposited a thin layer (20) of non-diamond carbon material between the diamond layers, but no other non-carbon material. Renucleation is controlled by varying the proportio...

PCT No. PCT/GB90/00704 Sec. 371 Date Jan. 8, 1992 Sec. 102(e) Date Jan. 8, 1992 PCT Filed May 4, 1990 PCT Pub. No. WO90/13396 PCT Pub. Date Nov. 15, 1990.A tool holding jig for a grinding machine has a tool holder 29 mounted on a parallelogram linkage having lower swivel rods 19 inclined slightly so that, as the tool holder 29 is rocked to and fro across the face 31 of a grinding wheel by a recipr...

PCT No. PCT/US90/02509 Sec. 371 Date Nov. 7, 1991 Sec. 102(e) Date Nov. 7, 1991 PCT Filed May 9, 1990.A process of treating water to remove metal ion contaminants contained therein, said metal ion contaminants selected from the group consisting of metals in Groups 8, 1b, 2b, 4a, 5a, or 6a of the periodic table, lanthanide metals, and actinide metals including transuranic element metals, by adjusti...

Improved shaped polyethylene articles are produced having a weight average molecular weight between 200,000 and 4,000,000 kilograms/kg mole, tenacity of at least 1147mN/tex (13 grams/denier) and a modulus of at least 3.09x10<4> mN/tex (350 grams/denier) and having a crystalline orientation function of at least 0.95, a main melting temperature of at least about 140 DEG C (measured at 10 DEG C/minut...

Ein biologischer Abbau von Schwefelwasserstoff erfolgt in einem Reaktor der polymerfixierte Mikroorganismen enthält, die als Biokatalysatoren in Gelkugeln eingeschlossen sind. Die Biokatalysatoren befinden sich in Wasser, und H2S-Gas sowie Sauerstoff werden in einem stöchiometrischen Verhältnis zugeleitet. Durch die Mikroorganismen wird H2S in Sulfat (SO4<->²) umgewandelt. Die Gelkugeln werden aus...

Fibrous thermal insulation comprises an intimate blend of A) non-graphitic carbonized fibers having an LOI value greater than 40, a percentage char value greater than 65, and a thermal conductivity less than 1.7 W/(m.K) (1.7 W/m.C)), and B) hollow thermoplastic fibers.

A vibrating surface gyroscope includes a piezoelectric resonator 10 of material arranged to have a plurality of poles 12, 14 of opposite sense or polarity disposed around the sensing axis. The resultant bi-directional (forward and reverse) poling establishes the mode and modal position of a vibration in the resonator 10. One surface of the structure includes a surface electrode having a surface re...

A highly transparent film having high strength, suitable extensibility, high weather resistance, low moisture absorption and so on is disclosed, which consists mainly of EVAT. And also various laminates making the most of the above properties of the film are disclosed, which comprise the EVAT interposed between two inorganic material sheets, two organic material sheets, or an inorganic material sh...

A method of producing a mixture that contains rubber or rubber-like material, and carbon black. The method includes the steps of adding to the rubber or rubber-like material a portion only of the intended total quantity of carbon black, thereupon preheating the above in a high-frequency alternating field, and subsequently adding in the remainder of the intended total quantity of carbon black. Expe...

Device for injecting a hydrocarbon feedstock into a catalytic cracking reactor, comprising, from upstream towards downstream in the direction of travel of the feedstock, a system (5) for allowing to enter and mixing the liquid hydrocarbon feedstock and steam, a venturi (6) whose converging cone (10) is connected to the said system (5) for allowing to enter and mixing, and a protective hood (7) int...

In an arrangement of a differential for driving two vehicle wheels, with an outer casing and a gearbox casing supported by a bearing. Provided on the gearbox casing is an annular face which is concentric in relation to the bearing axis and with which a solid of revolution made of an elastomer material and held on the outer casing is in continuous, concomitantly rotating contact with a small contac...

The electrical trigger control of a high pressure water jet pumping system (e.g. fig 1) comprises a high pressure pump (2) transmitting water through hose (3) to hand held lance (8) and nozzle (9). The process of pumping of water from high pressure pump (2) into hose (3) may be activated / deactivated by depression of lever (7) which actions switch (6) within trigger assembly (5) sending the appro...

A data processing system comprises a systolic array of data processing nodes Nij effectively arranged in rows i and columns j. Data communication paths are provided from each node to the next in the corresponding row, from each node to the next in the corresponding column, and from each node to that which lies in both the preceding row and the preceding column. Because each path gives rise to at l...

A system for detecting in an interrogation zone 13 the presence of magnetic tag 15 on an article 14 includes: an AC drive 11 which generates a voltage at a fundamental frequency; an antenna 12 which generates from the AC voltage an alternating magnetic field in said zone 13; a receiver antenna 16 for detecting the magnetic field and generating electric signals which contain harmonics of the fundam...

A receiving antenna of the array has nested upper loops 91, 92 with offset centres C1, C2, and nested lower loops 93, 94 with offset centres C3, C4, loops 91, 93 and loops 92, 94 forming respective figure eight configurations. The loops 91 to 94 are all electrically in series and all wound in a clockwise sense, with loops 91, 92 of one phase opposite to the phase of loops 93, 94 The receiving ante...

A transmitting antenna of the array has nested coplanar loops 202, 203 with respective major axes in the common plane and inclined at 45 degrees to one another. The transmitter antenna is housed with a receiving antenna in a cavity of a pedestal (301) (Fig 14), defined by plastics shells (302), (303), urethane foam (307) being used to free cavity void space and to surround the antennas (304), (305...

A method of processing digital data in a digitised image matrix in order to detect the positions of any sharp intensity variations present in adjacent ones of the pixels representing said image, the method comprising the steps of comparing the intensity of each primary pixel with those of the secondary pixels which surround it, calculating whether said primary pixel can be classified as having a c...

Electronic article surveillance (EAS) tags (20) are attached to articles of merchandise, not at the store (16) using EAS equipment (18), but in conjunction with the manufacture (10) of these articles. At that stage, the tags (20) are not detectable by the EAS equipment (18). They are made detectable upon receipt by an EAS-using store (16). For swept frequency RF EAS equipment (18), the tags (20) a...

An electric shaver wherein the motor housing carries a separable frame for confinement of the cutter and the frame carries a separable casing for an apertured foil which overlies the cutter in assembled condition of the shaver. The frame has a window which is adjacent one side of the cutter and serves for insertion of the casing so that the latter can be attached to or detached form the frame only...