摘要:
The present invention provides a siliver halide photographic photosensitive material which comprises a base, at least a silver halide emulsion layer provided on the base and at least a back coat layer comprising a gelatin containing a polymer mainly composed of styrenesulfonic acid provided on another side of the base wherein said back coat layer additionally contains a surface active agent represented by the following formula [I] and is hardened with a triazine. ##STR1## whererin n is a natural number of 1-20, M represents a hydrogen atom or an alkali metal, and R represents an alkyl group of 5-15 carbon atoms, or ##STR2## in which R.sub.1 represents an alkyl group of 5-15 carbon atoms and R.sub.2 represents an alkyl group of 1-3 carbon atoms, a hydrogen atom or a halogen atom. Said back coat layer is excellent in antistatic properties, adhesion to a base and drying properties.
摘要:
The present invention provides a silver halide photographic photosensitive material excellent in dimensional stability which comprises a polyethylene terephthalate film support and, provided thereon, at least one gelatin layer containing an active halogen type hardener, wherein water content in the gelatin layer is 20% by weight or less based on total amount of gelatin. Further provided is a method for producing such silver halide photographic photosensitive material which comprises coating a gelatin coating solution containing an active halogen type hardener on a polyethylene terephthalate film support and then drying the coat, wherein the coat is dried so that water content based on total amount of gelatin is 20% by weight or less and then, is subjected to a heat treatment.
摘要:
The present invention provides a silver halide light-sensitive film material having a backcoat layer which is sufficiently subjected to antistatic treatment. This material has an electrically conductive polymer layer comprising a copolymer of N-methylol(meth)acrylamide and styrenesulfonic acid as an antistatic layer between a film base and the backcoat layer.
摘要:
A wire electrode for wire cut electric discharge machining having a core wire of high thermal conductivity (made of copper, silver, aluminum or their alloys), an intermediate layer formed by a low-boiling point material (zinc), and an outermost layer of brass having high mechanical strength.
摘要:
A detecting electrode is mounted on the path of a thread in a sewing machine. When a cloth is sewn in the sewing machine, a bobbin thread or a needle thread moves spatially against the detecting electrode. An electric signal is obtained on the detecting electrode in response to such movement of the thread. On the other hand, a timing signal generator generates a timing signal synchronous with the vertical movement of the needle in the sewing machine. A discriminator receives the electrical signal from the detecting electrode and the timing signal from the timing signal generator. The discriminator compares the electric signal with a reference signal when it receives the timing signal and outputs a discrimination signal in accordance with the result of the comparison.
摘要:
A magneto-strictive torque sensor for electrically contactlessly detecting a torque applied to a rotary shaft on the basis of a resulting change in the magnetic permeability of the surface of the shaft. Fine dents and retainer areas for retaining residual compressive stress due to the fine dents are formed on the surface of the rotary shaft. According to this arrangement, the process of magnetization resulting from the application of an exciting magnetic field and of the torque to the rotary shaft involves less magnetization due to magnetic domain wall displacement and consists principally of reversible magnetic rotation, with the result of reduced hysteresis in the magnetization process. The reduced hysteresis causes less hysteresis involved in torque detection and higher detection sensitivity, thus resulting in high accuracy of torque detection. Further, by working the surface of the rotary shaft for the purpose of forming the fine dents thereon, microdefects present on the surface layer of the rotary shaft are reduced or eliminated and thus reduced hysteresis and improved sensitivity can be attained in the process of torque detection.
摘要:
A wire electrode for wire-cut electrical discharge machining includes a wire composed of a core made of one of an amorphous pure metal and an amorphous alloy and a thin crystalline layer serving as a surface of the core. The wire may be coated on its surface with a layer of a material of high electrical conductivity. The amorphous alloy may be Cu-based, Fe-based, or Co-based. The use of an amorphous pure metal or alloy yields a wire electrode of much greater tensile strength than previous wire electrodes, enabling a higher machining speed.
摘要:
The gap width g between a workpiece 12 and the outlet of a nozzle 7, 8 is automatically and continuously controlled in accordance with a predetermined configuration of a groove 15 being machined to facilitate the exhaust of injected machining liquid 10 and entrained dust particles 14 from the groove.
摘要:
The invention relates to a method of producing magnetostriction type torque sensor shafts adapted to detect a change in permeability when a torque is applied. A plurality of shot peening operations are applied to the surface of a torque sensor shaft in such a manner that the diameter of shot particles to be used is decreased each time. This arrangement ensures that the region in which the residual stress is at a maximum and approximately constant lies over a wide range as seen in the direction of the depth from the outermost surface of the shaft and extends from a deep area to an area close to the surface of the shaft. As a result, the hysteresis and nonlinearity of the shaft are improved and it becomes possible to use a wide range of excitation frequencies.
摘要:
A wire electrical discharge machining apparatus comprising a nozzle for a machining liquid for jetting the machining liquid from a jet hole, a surrounding member for intercepting the flow of the machining liquid jetted from the nozzle so as to prevent the machining liquid from flowing out to a portion other than the spark gap, and a holding device for holding the surrounding member so as to removably mount the surrounding member on the nozzle and so that the surrounding member does not slip off while mounted. The holding device facilitates both the operation of mounting and dismounting the surrounding member on and from the nozzle and replacement of the surrounding member. Since the surrounding member does not slip off while it is mounted, smooth preparation and working is enabled.