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    • 7. 发明授权
    • Surface mounting crystal oscillator
    • 表面贴装晶体振荡器
    • US06720837B2
    • 2004-04-13
    • US10254620
    • 2002-09-25
    • Kouichi MoriyaKuichi KuboKatsuyuki SatoYoshinori Narita
    • Kouichi MoriyaKuichi KuboKatsuyuki SatoYoshinori Narita
    • H03B532
    • H03B5/368H01L2924/16195
    • A surface mounting quartz crystal oscillator has an IC chip containing an oscillator circuit, and a quartz crystal unit which are sealed in a container body by a metal cover, wherein stray capacitances C1, C2 are equivalently in parallel with oscillation capacitors Ca, Cb connected to one and the other ends of the crystal unit, respectively. A gap between the IC chip and a crystal blank of the crystal unit, and a gap between the crystal blank and metal cover are set in accordance with a changing amount of the oscillation frequency due to a change in the stray capacitances C1, C2 in a direction in which a change in equivalent series capacitance is reduced, as viewed from the crystal unit, while maintaining a spacing between the IC chip and metal cover.
    • 表面安装石英晶体振荡器具有含有振荡电路的IC芯片和通过金属盖密封在容器主体中的石英晶体单元,其中杂散电容C1,C2等效地与连接到 分别是晶体单元的一端和另一端。 根据由于杂散电容C1,C2的变化引起的振荡频率的变化量,设定晶体单元的IC芯片和晶体坯料之间的间隙以及晶体坯料与金属盖板之间的间隙 在从晶体单元观察时,等效串联电容的变化减小的方向,同时保持IC芯片和金属盖之间的间隔。
    • 9. 发明授权
    • Engine cylinder head with precombustion chambers using porous ceramics
insert
    • 使用多孔陶瓷刀片的预燃室的发动机气缸盖
    • US4873952A
    • 1989-10-17
    • US161013
    • 1988-02-26
    • Yoshinori NaritaMitsuyoshi Kawamura
    • Yoshinori NaritaMitsuyoshi Kawamura
    • F02B19/16
    • F02B19/165Y02T10/125Y10T29/49272
    • The invention relates to a cylinder head for an internal combustion engine in which each combustion chamber has a prechamber. A cast metal body of the cylinder head has recesses each of which provides a prechamber, and a hollow and, for example, bell-shaped member of a porous ceramics is cast-inserted in the inner surface defining each recess. Use is made of a ceramics low in thermal expansion coefficient and heat conductivity, such as aluminum titanate or cordierite, and the porosity of the ceramics is 5 to 50%. Because of its porousness the cast-inserted ceramics member is easily machine-finished. After that, for enhancement of strength and durability, the cast-inserted member of the porous ceramics is impregnated with an inorganic refractory material by using either a solution of, for example, sodium silicate or aluminum phosphate or an aqueous suspension of a ceramics powder, or a mixture of the solution and the suspension.
    • 本发明涉及一种用于内燃机的气缸盖,其中每个燃烧室都具有预燃室。 气缸盖的铸造金属体具有各自提供预制室的凹部,并且多孔陶瓷的中空的,例如钟形的构件被铸造插入到限定每个凹部的内表面中。 使用的陶瓷的热膨胀系数和导热系数低,如钛酸铝或堇青石,陶瓷的孔隙率为5〜50%。 由于其多孔性,铸造陶瓷构件容易机加工。 之后,为了提高强度和耐久性,通过使用例如硅酸钠或磷酸铝的溶液或陶瓷粉末的水性悬浮液,多孔陶瓷的铸造插入构件用无机耐火材料浸渍, 或溶液和悬浮液的混合物。