摘要:
Disclosed is a spindle device (5) for a machine tool such that draw bar (22) is inserted into spindle (20) which is rotatably supported in housing (12), and draw bar (22) is biased to a rear of spindle (20) by an elastic force of disc springs (23), resulting in tool holder (51) being clamped to spindle (20). Spindle device (5) is equipped with unclamping device (60) that comprises piston (63) which is provided in annular space (55) between spindle (20) and draw bar (22), and which, by means of fluid pressure, causes draw bar (22) to move toward the front of spindle (20) in resistance to the elastic force.
摘要:
Disclosed is a shoe press belt (10) which comprises a reinforcing fibrous base material (6) embedded in a polyurethane layer, and has an outer circumference layer (2a) and an inner circumference layer (2b) each formed with a polyurethane. The polyurethane layer constituting the outer circumference layer (2a) comprises a polyurethane which is cured by the reaction of an urethane prepolymer (A) with a curing agent mixture (B). The urethane prepolymer (A) is produced by reacting an isocyanate compound selected from p-phenylene-diisocyanate and 4,4′-methylenebis(phenylisocyanate) with a polytetramethylene glycol and has an isocyanate group at its terminal. The curing agent mixture (B) comprises 1,4-butanediol and an aromatic polyamine having an active hydrogen group (H). The shoe press belt has excellent wear resistance, cracking resistance and bending fatigue resistance.
摘要:
The present invention provides a damping member constituted of a viscoelastic member and a constraint member, each of which is formed on a brush made of thin metal plate, in a dc minimotor, the viscoelastic member comprising adhesive mass containing a copolymer of alkyl acrylate and acrylic acid. The present invention further provides a brush constituted of the above damping member and a dc minimotor equipped with the brush.
摘要:
A method and apparatus for measurement of the eccentricity dimension which measures the eccentricity dimension .alpha. between optical fibers and a coating member of a fiber ribbon made up of optical fibers and a coating member having a rigidity relatively lower than the fibers and covering the outer surface of fibers. When taking up the fiber ribbon at a constant speed, the rotational speed .omega..sub.a of a first rotary drum made to contact one surface of the fiber ribbon and the rotational speed .omega..sub.b of a second rotary drum made to contact the other surface of the fiber ribbon are measured and the radii R of the rotary drums, the overall thickness t of the fiber ribbon, and the rotational speeds .omega..sub.a and .omega..sub.b of the rotary drums are substituted in the following equation to compute the eccentricity dimension .alpha.:.alpha.=(.omega..sub.b -.omega..sub.a) (R+t/2) / (.omega..sub.b +.omega..sub.a)
摘要翻译:用于测量偏心尺寸的方法和装置,其测量光纤与由光纤构成的纤维带的涂层构件之间的偏心尺寸α和具有比纤维相对低的刚度并且覆盖光纤的外表面的涂层构件 纤维。 当以恒定的速度吸收纤维带时,与纤维带的一个表面接触的第一旋转鼓的旋转速度ωa和与纤维的另一个表面接触的第二旋转鼓的旋转速度ωb 测量丝带,旋转鼓的半径R,纤维带的总厚度t和旋转鼓的旋转速度ωa和ωb在下面的等式中被代入以计算偏心尺寸α:α=( ω-ω-a)(R + t / 2)/(ωb +ωa)
摘要:
Disclosed is a shoe press belt (10) which comprises a reinforcing fibrous base material (6) embedded in a polyurethane layer, and has an outer circumference layer (2a, 21) and an inner circumference layer (2b, 22) each formed with a polyurethane. The polyurethane layer comprises a polyurethane which is produced by curing a composition comprising a mixture of an urethane prepolymer (A) and a curing agent (B). The urethane prepolymer (A) is produced by reacting an isocyanate compound (a) containing 55 to 100 mol % of a p-phenylene-diisocyanate compound with polytetramethylene glycol (b) and has an isocyanate group at its terminal. The curing agent (B) is selected from the group consisting of 1,4-butanediol, hydroquinone bis-βhydroxylethyl ether, 3,5-diethyltoluenediamine and 3,5-dimethylthiotoluenediamine. The belt (10) has excellent cracking resistance, bending fatigue resistance and wear resistance.
摘要:
Disclosed is a shoe press belt (10) which comprises a reinforcing fibrous base material (6) embedded in a polyurethane layer, and has an outer circumference layer (2a, 21) and an inner circumference layer (2b, 22) each formed with a polyurethane. The polyurethane layer comprises a polyurethane which is produced by curing a composition comprising a mixture of an urethane prepolymer (A) and a curing agent (B). The urethane prepolymer (A) is produced by reacting an isocyanate compound (a) containing 55 to 100 mol % of a p-phenylene-diisocyanate compound with polytetramethylene glycol (b) and has an isocyanate group at its terminal. The curing agent (B) is selected from the group consisting of 1,4-butanediol, hydroquinone bis-βhydroxylethyl ether, 3,5-diethyltoluenediamine and 3,5-dimethylthiotoluenediamine. The belt (10) has excellent cracking resistance, bending fatigue resistance and wear resistance.
摘要:
A damper continuous feeding body having a plurality of punched out dampers, each of which is constituted by a viscoelastic body and a restraint body which are laminated on each other, wherein surfaces of the viscoelastic bodies are pasted on a release surface of a continuous liner so that the plurality of dampers are arranged at a predetermined pitch. The damper continuous feeding body allows dampers to be pasted by an automatic machine so as to improve the accuracy of the pasted positions of the dampers and to enhance the efficiency in pasting, and further whereby the dampers can be prevented from being exposed to contamination.
摘要:
This invention relates to an improvement of a reflection mode alkali photocathode which relies on controlling a deposition weight of antimony. The reflection mode alkali photocathode according to this invention includes a thin layer of antimony directly deposited on a base substrate and activated by alkali metals. The thin film of antimony is deposited in a thickness of below 100 .mu.g/cm.sup.2. This reflection mode photocathode is suitably usable in photomultipliers. As the base substrate, nickel, aluminium and stainless, etc. are used. As the alkali metals, cesium, potassium, sodium and rubidium are usable.
摘要:
This invention relates to an improvement of a reflection mode alkali photocathode which relies on controlling a deposition weight of antimony. The reflection mode alkali photocathode according to this invention includes a thin layer of antimony directly deposited on a base substrate and activated by alkali metals. The thin film of antimony is deposited in a thickness of below 100 .mu.g/cm.sup.2. This reflection mode photocathode is suitably usable in photomultipliers. As the base substrate, nickel, aluminium and stainless, etc. are used. As the alkali metals, cesium, potassium, sodium and rubidium are usable.
摘要:
An electronic still camera having a photographing system, a photographing element located at a surface of the photographing optical system on which an image is formed and a finder optical unit disposed separately from the photographing optical system. An optical path of the finder optical unit includes a forward optical path disposed parallel to and close to the photographing optical system, a rearward optical path disposed at a position away form an optical axis of the photographing optical system farther than the forward optical path and a deflected optical path for connecting the forward optical path to the rearward optical path and disposed at a position forward of the photographing element.