摘要:
A rotary valve unit in a pulse tube refrigerator is quiet, and has high durability and improved refrigeration efficiency by restricting the generation of unidirectional flow. A center hole is formed on a sliding plane side as a recessed space in the sliding surfaces between the sliding plane and another sliding plane. Since the second center hole is in communication with a low pressure input port via a communication passage, the leakage between the sliding surfaces of the sliding planes can be introduced to the low pressure input port with low pressure.
摘要:
In a Stirling engine, a thermal isolating space is provided between an expansion space and a heating portion so as to establish a thermal isolation of the expansion space from the heating portion.
摘要:
A thermally operated refrigerator includes a hot space absorbing a heat from an outer heat source at a high temperature, an ambient space having a first portion and a second portion, a heat accumulator disposed between the hot space and the first portion of the ambient space for establishing a first fluid circuit in which an amount of operating fluid is filled, a hot displacer whose reciprocal movement establishes a periodical movement of the operating fluid in the first fluid circuit for rejecting the heat absorbed at the hot space to the first portion of the ambient space, a cold space absorbing a heat from a load at a low temperature, a cooler disposed between the cold space and the second portion of the ambient space for establishing a second fluid circuit in which an amount of operating fluid is filled, a cold displacer whose reciprocal movement establishes a periodical movement of the operating fluid in the second fluid circuit for rejecting the heat absorbed at the cold space to the second portion of the ambient space, a mechanism for driving the hot displacer and the cold displacer concurrently, an additional ambient space having a variable volume and disposed between the first portion and the second portion of the ambient space.
摘要:
A substrate cleaning apparatus for cleaning a rotating substrate has a scrub cleaning tool for cleaning the substrate by bringing the cleaning tool into contact with the substrate, a liquid jet spray nozzle for cleaning the substrate by yet-spraying a cleaning liquid from the nozzle to the substrate, and a swing mechanism for simultaneously swinging both of the scrub cleaning tool and the liquid jet spray nozzle on and above the substrate. The substrate cleaning apparatus also has a cleaning tool vertical driving mechanism for moving at least the cleaning tool from a position where the cleaning tool is in contact with a surface of the substrate to another position where the cleaning liquid jet-sprayed from the nozzle is applied to the cleaning tool, by vertically moving the cleaning tool.
摘要:
A CSP (Chip Size Package) of the present invention includes a semiconductor IC (Integrated Circuit) chip having I/O (Input/Output) terminals along its edges. A small size substrate has a smaller contour than the chip and has a plurality of metal terminals arranged along the edges of its bottom, and a plurality of metal bumps arranged on its top in a lattice configuration. The top of the chip and the bottom of the substrate are so configured as to be electrically connected to each other via a tape member including a plurality of leads. These leads each include a first terminal to be electrically connected to the associated I/O terminal of the chip, and a second terminal to be electrically connected to the associated metal terminal of the substrate.
摘要:
A swing training device includes a housing which contains a light source, a power source and a driving circuit for generating a beam, such as a laser beam. Suitable optics, such as a collimator lens and a beam splitter (such as a half-mirror or a prism) are placed in the housing in order to split a highly defined beam so that a first beam is radiated along the longitudinal axis of the golf club shaft and a second beam is radiated at roughly a 90.degree. angle with respect to the first beam. A gravity switch in the swing training device provides that the beams are only radiated during the backswing and follow through of a golf club, thus simplifying operation, saving power and reducing the likelihood of inadvertent radiation of the laser beam into the face of the golfer or bystanders. The invention may also include a mat which has indicia for properly aligning lighted dots generated on the mat by the laser beams in order that the golfer may develop a proper swing form. The housing has a nesting portion which is received within an upper open end of a golf club shaft. The housing is removably secured to the golf club shaft by a collar and set screw arrangement. The cap on the housing may be rotatable to provide for radial adjustment of the second beam, to suit the needs of the golfer.
摘要:
A sealing apparatus applied to a vertical type flexible package forming, filling and closing machine includes a heater block arranged near a filling tube and having a heating ridge, and a web guide attached to the outer surface of the filling tube and having a pair of guide rails, and the heating ridge cooperates with the pair of guide rails to hold the joint of a traveling package web therebetween in such a manner that the joint is elastically deformed in convex form in cross section, whereby the joint is concentratedly applied with heat and thus is heat-sealed.
摘要:
In an LSI package, terminal resistance elements are formed of resistive paste which, consisting of a mixture of fine powder of either oxidized metal or carbon and fine powder of glass, is buried and sintered in a ceramic wiring board in the direction to penetrate it. Front side wiring, connecting the parts of the terminal resistance elements exposed on the front face of the ceramic wiring board to input/output circuits of the LSI chip to be mounted on the front face of the ceramic wiring board, is formed on the front face of the ceramic wiring board and in the top layer of the ceramic wiring board. Back side wiring, connecting the parts of the terminal resistance elements exposed on the back face of the ceramic wiring board to a voltage clamp wiring network, is formed on the back face of the ceramic wiring board.
摘要:
A pulse tube refrigerator according to the present invention is capable of performing cryogenic operation sufficiently. The cryostat includes regenerators and pulse tubes. Each regenerator has a cold stage at an upper end thereof. Each pulse tube has a low-temperature end portion at a lower end thereof and a high-temperature end portion thereof, the low-temperature end portion being located lower than the cold stage. The cold stage and the low-temperature end portion are connected to each other through a line whose cubic volume is substantially negligible in comparison with that of the pulse tube. Since the pulse tube has working gas of relatively high density in an upper portion thereof and working gas of relatively low density in a lower portion thereof, there is no convection of working gas induced by the gravity. Thus, the cryostat performs cryogenic operation sufficiently without being adversely affected.
摘要:
A lens device which is applied to a projection type image display apparatus includes an outer tube and an inner tube forming a tube structure having an optical lens and a thermal react material such as bimetallic sheet disposed between the outer tube and the inner-tube. Lens focus is corrected by moving a relative position between the outer tube and the inner tube in an optical axis direction to thereby maintain an initially set focus position to obtain an image of high picture quality.