摘要:
A cartridge case of extruded polyolefin is degradable when discharged into the environment. This is achieved by including in the casing plastic an additive which initiates degradation only on firing.
摘要:
A reinforced ceramic tube for refractory use comprises a settable slurry cast inside a metal sleeve with longitudinal compliance. In use the sleeve moves with ceramic under thermal stress to avoid major cracking.
摘要:
An inner peripheral portion of a metallic diaphragm (11) having a mounting hole (lla) at a central portion is held between a metallic welding fitting (8, 8') and a metallic holding member (6, 17), each respectively having an annular flat portion (8a, 6a, 17a) to contact an inner peripheral portion. The inner peripheral portion of the metallic diaphragm and the portions of the metallic welding fitting and the metallic holding member contacting the inner peripheral portion of the foregoing metallic diaphragm are welded at W', W'' along entire peripheries thereof in order to secure these three components together as one body.
摘要:
A three way switching controller (1) for handling high purity gas, and the like, used for a semiconductor manufacturing plant, and the like, prevents lines on switching sides thereof from communicating with each other at time of switching. The three way switching controller includes a body (2), first and second valves (3 and 4), a cylinder (5), and a linking mechanism (6), with the linking mechanism including a disengagement device (7). The cylinder, operating through the linking mechanism, alternately opens and closes normally-closed valves. The disengagement means prevents a driving force of the cylinder from being applied at once to the valves upon initiation of operation of the cylinder, thereby allowing both of the valves to be in a free state (closed state).
摘要:
A shot-gun cartridge includes a main wad which is biodegradable. The wad is preferably formed from a composition including synthetic resin natural starch and chemically active prodegradents.
摘要:
A non-contacting shaft sealing device in which an even-number of dynamic pressure generating groove groups (7) are arranged in the peripheral direction thereof on a sealing end face (5a) of the seal case side or a sealing end face (5a) of the rotary shaft side (2). Each dynamic pressure generating groove group (7) is composed of one or plural shallow L-shaped grooves of a specific groove width comprising a fluid lead-in part extending in the radial direction from a peripheral edge of high pressure side (H) of said sealing end face and a dynamic pressure generating part extending in the peripheral direction from the end portion thereof. When the dynamic pressure generating groove group (7) is composed of plural L-shaped grooves, those L-shaped grooves are arranged close to each other at an equal pitch without crossing each other such that the end portion of each dynamic pressure generating part is positioned on a fourth sealing end face diametral line. Each dynamic pressure generating groove group (7) is symmetrical with respect to each of the adjacent dynamic pressure generating groove groups (7) on both sides thereof around a first sealing end face diametral line passing between those fluid lead-in parts (between the fluid lead-in parts of the outermost side when the dynamic pressure generating groove group is composed of a plurality of the L-shaped grooves) or a second sealing end face diametral line passing between those dynamic pressure generating groove groups. The groove land ratio ϑ₁/ϑ₂ in the peripheral direction is 0.5 to 0.9 wherein the angle of intersection ϑ₁ is formed between the third sealing end face diametral line running along the fluid lead-in part of the dynamic pressure generating groove group (7) (the fluid lead-in part of the outermost side when the dynamic pressure generating groove group is composed of a plurality of L-shaped grooves) and the fourth sealing end face diametral line on which the end portion of the dynamic pressure generating part is positioned, while the angle of intersection ϑ₂ is formed between the fourth sealing end face diametral line of the adjacent dynamic pressure generating groove group which is adjacent to the dynamic pressure generating parts of the aforementined dynamic pressure generating groove group (7) and the aforemention third sealing end face diametral line.
摘要:
The invention provides novel photographic compositions comprising a propene isomer of formulae (I), wherein A, B or E, each individually represent hydrogen, or an electron withdrawing group, selected for example from -CN, -NO2, -SO2R, -SO2NH-, -CO2R, -COR, -CONHR, -CONHAr, -CF3 halogen, amino, aryl, aralkyl, alkyl, cycloalkyl, alkyl (carbonyl)oxy, aryl (carbonyl)oxy, carboxy, alkoxycarbonyl, aryloxycarbonyl, carbamomyl, acyl, alkylaminocarbonyl, arylaminocarbonyl, alkoxycarbonylamino, acylamino, ureido, alkylsulphonylamino, arylsulphonylamino, sulphamoylamino, alkylsulphonyl, arylsulphonyl, sulphanoyl, imido, alkylthio, arylthio and heterocycles; the invention also provides a propene isomer of formulae (I), wherein D represents a group of the formula Ar-L-, wherein Ar is a phenyl group optionally substituted with one or more substituents, and -L- is a linking group incorporating a lone pair of electrons; and A, B, E and X are defined as R is above defined. The activated propenes of the above formulae are novel colour couples which react with oxidised developer under alkaline conditions to give magenta dyes. These dyes have no significant absorption in the blue region of the visible spectrum.