摘要:
An aluminum alloy having a composition represented by the general formula: AlbalCuaMb or AlbalCuaMbTMc wherein M represents one or two elements selected between Mn and Cr; TM represents at least one element selected from the group consisting of Ti, Zr, V, Fe, Co, and Ni; and a, b and c each represent an atomic percentage of 0
摘要:
A light source having a lamp for generating light generates a lamp on signal at an output terminal thereof when the lamp is lit. A lamp life meter is connected to the light source for detecting the time that the lamp has been lit. The lamp life meter includes a housing having at least one contact terminal adapted to be coupled to the output terminal of the light source, a clock generator located in the housing and generating clock signals, a counter located in the housing and counting the clock signals whenever the clock on signal indicates that the lamp is on and a display mounted in the housing for displaying an indication of the time the lamp has been turned on.
摘要:
A click plate (9) constituting a switch used for an operation key etc. of a portable telephone is attached on a substrate (1 by soldering it on a contact pattern (6) formed on the substrate. The click plate (9) includes a convex portion (11) which center portion is expanded and made hollow. The convex portion is pushed and deformed to contact with a contact pattern (7) on the substrate thereby to generate a contact signal. The peripheral portion (10) of the click plate (9) is provided with attachment portions (17) protruded outward. The attachment portions (17) are soldered on the contact pattern (6). In this manner, the click plate can be attached on an arbitrary position in a manner that the click plate (9) is attached on the substrate (1) by the soldering.
摘要:
An electronic component feeding apparatus for separating a foremost electronic component conveyed to a predetermined takeout position from a succeeding electronic component, wherein, the separating device includes a first component stopper, a second component stopper projecting from the first component stopper and having a magnetic attractive force at a tip end thereof for separating a foremost electronic component. The second component stopper is movable within the first component stopper between a retracted and a protruding position so that the foremost electronic component engages both the first and second component stoppers during separation from a succeeding electronic component.
摘要:
A data processor has a first cache memory with a large capacity and one port and a second cache memory with a small capacity and two ports disposed between a main memory and an instruction processing section. Data which is frequently used is stored in the first cache memory and data which is less frequently used is stored in the second cache memory under control of a controller responsive to prefetch instructions. One of the cache memories may be a set associative cache memory composed of a plurality of memory chips each having at least two memory banks and an output part to gain access to data sets consecutively and one at a time within the memory banks. On the basis of an address sent from the instruction processing section, a memory bank is selected, and a data set from the selected memory bank is supplied to the processing section.
摘要:
An electronic component supplying apparatus conveys electronic components in an aligned state to supply the same to a predetermined taking-out position. When a leading chip component abuts on a component stopper and a component conveyance is stopped, a plurality of the chip components including the leading chip component are covered in a non-contacting state by a slider, the leading chip component which has abutted on the component stopper is attracted to the component stopper. In a state where the component conveyance by the conveying path is stopped, the component stopper is displaced in a component conveying direction, the leading chip component is separated from a second leading chip component, and also the slider is displaced in a direction opposite to the component conveying direction, so that the slider covering is uncovered, and the leading chip component is allowed to be taken out.
摘要:
In an electronic component placing apparatus, four magazines are mounted on a head, and yet electronic components are housed in each magazine. In this apparatus, by an operation of selectively inserting a suction nozzle into four insertion openings in the magazines, it is possible to load a desired electronic component on a substrate, and this component loading can be repeatedly performed until the housed components are exhausted.
摘要:
Electronic chips accumulated at random directions are arranged in an orderly line by a chip part supplier. A chip part feeder transfers the first aligned chip onto a printed circuit board. Chip parts having random directions in a hopper are fed to a discharge channel, organized in a prescribed direction and transferred through the discharge channel before being discharged through the channel bottom end onto a conveying belt before being carried by the belt in a prescribed direction. A clearance forcefully caused between the first chip and next chip separates the two chips completely just before the first chip is picked up. The thus separated first chip part is picked up by a suction head before being transferred to the printed circuit board.
摘要:
A polishing apparatus for polishing a surface of an object such as a semiconductor wafer includes a turntable having a polishing cloth mounted on an upper surface thereof, a top ring for holding and pressing the object against the polishing cloth, and a plurality of radially arranged nozzles for supplying a polishing solution, containing abrasive material, of different concentrations that differ along a radial direction of the polishing cloth.
摘要:
A beer filtering device of a filter press type for filtering a beer stock. The beer filter device includes a plurality of filter plates (4) and a plurality of filter frames (6) arranged side by side in alternate relationship to each other. A filter element (28) is supported to each filter plate (4). A stock line (66) for supplying a beer stock and a filtrate line (68) for discharging a filtrate of the beer stock are so formed as to penetrate through the filter plates and the filter frames in the thickness direction thereof. The stock line and the filtrate line are sealed by a plurality of stock line seals (48) and a plurality of filtrate line seals (74), respectively, each interposed between the filter plate and the filter frame adjacent to each other in a filtering step. A plurality of washer liquid seals (76) are provided outside the stock line seals and the filtrate line seals in such a manner that each washer liquid seal is interposed between the filter plate and the filter frame adjacent to each other. In a washing step, a space defined by the filter plates and the filter frames is sealed by the washer liquid seals under the condition where the sealed condition of the stock line and the filtrate line by the stock line seals and the filtrate line seals is released. In this condition, a washer liquid is circulated in the sealed space defined by the washer liquid seals to thereby extensively wash and sterilize the interior of the beer filtering device.