摘要:
In this mounting structure and method for a surface mounted type electronic component, the component has at least one terminal which protrudes from its bottom surface and which terminates in a foot portion for being soldered to a printed circuit board. Also, a projection extends from this bottom surface of the electronic component for a distance somewhat less than the amounty by which the terminal projects from it. This projection is provisionally secured by adhesive to the printed circuit board with the foot portion of the terminal overlaying that circuit portion to which it is to be soldered, and then subsequently this terminal foot portion is soldered to this circuit portion. Thereby, during the soldering process, there is no risk of the terminal foot portion becoming displaced from the circuit portion and thus badly soldered thereto, because of the locating action of the adhered projection. The projection may extend from a central portion of the bottom surface of the component, or may be provided in plurality as extending from central portions of edges of said bottom surface. And the end of the projection may be roughened.
摘要:
This low profile electromagnetic relay includes a base and a support post protruding at one end of the base. An electromagnet assembly is mounted in a generally central position on the base, and has a pair of magnetic pole surfaces on opposite sides of its one end. An armature assembly includes an insulating armature member, shaped generally as a hollow rectangular member with an open space being defined within it and formed with a hole by which it is rotatably fitted over the support post with the electromagnet assembly fitting inside the open space defined within it. A drive portion is connected to the insulating armature member. A pair of mutually opposed armature pieces are mounted on the insulating armature member, and, when the insulating armature member is rotatably fitted over the support post, lie on opposite sides of the one end of the electromagnet assembly and each oppose one of the magnetic pole surfaces of the electromagnet assembly. A permanent magnet member is mounted so as to bridge between the pair of mutually opposed armature pieces. And a contact mechanism is fitted to the base and is driven by the drive portion of the insulating armature member. Thereby the height of the relay is minimized, and the stability of its action is assured.
摘要:
An electromagnetic relay of the present invention has a large dielectric strength between a coil and each contact because of an insulative member interposed therebetween. Even if the straight distance between the coil and each contact is small, it is possible to obtain a sufficient dielectric strength without an extra process. Moreover, since a leg part of the coil terminal is coated with an insulative resin, the dielectric strength between the coil terminal and a movable iron element or a movable contact piece is enhanced. An insertion window formed in an insulating plate of the coil helps to insert a thickness gauge with high positioning accuracy.
摘要:
An apparatus for measuring a shape of a surface, comprises a measurement head which measures a distance between a reference point and the surface by detecting interference between test light obtained when light that passes through the reference point is emitted, is reflected by the surface, and returns to the reference point, and reference light, a scanning mechanism which scans the measurement head, and a processor which calculates the shape of the surface based on the distance measured using the measurement head and coordinates of the reference point.
摘要:
An apparatus for measuring a shape of a surface, comprises a measurement head which measures at least one of a distance between a reference point and the surface and a direction of a normal from the surface to the reference point, a scanning mechanism which scans the measurement head, and a processor which calculates the shape of the surface based on a measurement result measured using the measurement head and coordinates of the reference point, wherein the coordinates of the reference point are calibrated using a measurement result measured by scanning the measurement head along a scanning path in association with a first surface to be measured, and a shape of a second surface to be measured is calculated based on a measurement result measured by scanning the measurement head along the same scanning path in association with the second surface, and the calibrated coordinates of the reference point.
摘要:
When a new paper sheet is supplied onto a compiling tray, a sub-paddle holds down paper sheets having already been stacked on the compiling tray until a leading edge of the new paper sheet S touches the stacked paper sheets. Thereafter, the sub-paddle gets apart from the sheets stacked on the compiling tray with timing, with which the rear edge of the new paper sheet falls on the compiling tray.
摘要:
An exposure apparatus for and a method of producing devices, in which an original pattern such as a reticle is projected onto an object such as a wafer to be exposed, through a projection optical system. The projection optical system includes at least one optical element, optical characteristics thereof having been tested using a measuring beam having a first wavelength region. An exposure light source emits a light beam having a second wavelength region, selected independently from the first wavelength region, to irradiate the original pattern with the beam from the exposure light source, so that an image of the pattern is projected onto the object through the projection optical system, thereby exposing the object to produce the device.
摘要:
The invention provides a novel anti-tumor agent highly effective for inhibiting growth of several tumor or cancer cells with low toxicity. The active ingredient contained in the anti-tumor agent is an .omega.-triorganosilyl-substituted linear alkanoic acid anilide which is a hitherto unknown novel compound prepared by the reaction of corresponding acid chloride and aniline.
摘要:
The invention provides a novel class of organosilicon compounds and a method for the preparation thereof as well as an anti-tumor agent containing the compound having very remarkable anti-tumor activity but with very low toxicity. The inventive compound is a (trihydrocarbylsilylmethyloxyimino)alkane, which is a silicon-containing oxime compound hitherto not described in any prior art literatures, represented by the general formula R.sup.1.sub.3 Si--CH.sub.2 --O--N.dbd.Y, R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group having from 1 to 10 carbon atoms and Y is a divalent hydrocarbon group denoted by .dbd.CR.sup.2 R.sup.3 or .dbd.CR.sup.4, R.sup.2 and R.sup.3, which may be identical or different, having the same meaning as R.sup.1 defined above and R.sup.4 being an alkylene group to form a ring structure jointly with the carbon atom directly bonded to the nitrogen atom. Typical examples of the compounds are: 2-(trimethylsilylmethyloxyimino) butane, 2-(trimethylsilylmethyloxyimino)propane, 2-(dimethylphenylsilylmethyloxyimino) butane and trimethylsilylmethyloxyiminocyclohexane.
摘要:
The present invention presents a novel class of compounds bis(triorganosilylalkyl) phosphites, e.g. bis(trimethylsilylmethyl) phosphite. The compound is readily prepared by the reaction of a corresponding triorganosilyl alkanol with phosphorus trichloride or by the partial hydrolysis of a corresponding tris(triorganosilylalkyl) phosphite with an equimolar amount of water followed by distillation of the reaction mixture.The compound has a remarkable anti-transplanted tumor effectiveness as established by the test with mice as the test animals for preventing the growth of Ehrlich's cancer cells and Sarcoma 180 cells. The compound has very low toxicity when orally administrated.