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公开(公告)号：US3836234A
公开(公告)日：1974-09-17
申请号：US34011773
申请日：1973-03-12
发明人： FARNSWORTH J
CPC分类号： G03B9/08
摘要： A fully-closing iris diaphragm is disclosed which consists of a substantially conventional iris diaphragm with the addition of a capping section to one leaf, which is positioned to obscure the minimum aperture obtainable without ''''scissoring'''' distortion of the leaves.
摘要翻译： 公开了一种完全闭合的虹膜光阑，其由基本上常规的虹膜光阑组成，在一个叶片上添加了封盖部分，其被定位成遮蔽可获得的最小孔径，而不会“叶片”的叶片变形。
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公开(公告)号：US3833301A
公开(公告)日：1974-09-03
申请号：US35896973
申请日：1973-05-10
发明人： MOORE W
CPC分类号： G01B9/021 , G02B5/32 , Y10S359/90 , Y10S359/902
摘要： In place of earlier known sphericity testing techniques using accurate reference surfaces which are compared with a surface under test, this invention provides an absolute test of sphericity by making use, in effect, of the spherical wavefronts emanting from or converging to a point. A hologram plate is illuminated with coherent light from a laser to establish a first beam which forms a virtual image at the same point as that at which a beam illuminating the surface under test is focused, the illuminating beam being reflected at the surface and forming with the first beam observable interference fringes indicative of departures of the surface under test from true sphericity.
摘要翻译： 本发明通过使用与待测表面进行比较的精确参考表面代替早先已知的球形度测试技术，通过实际使用从一个点出发或会聚到一个点的球面波前来提供球形度的绝对测试。 用来自激光器的相干光照射全息板，以建立第一光束，该第一光束在与照射受测试表面的光束聚焦的位置相同的点处形成虚像，照明光束在表面处被反射并形成 第一束可观察到的干涉条纹指示被测表面的离开真实球形。
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公开(公告)号：US3829623A
公开(公告)日：1974-08-13
申请号：US25138872
申请日：1972-05-08
发明人： WILLIS J , URQUHART PULLEN D
摘要： An audio-transducer incorporates a diaphragm carrying a current conductor and a plurality of permanent magnets constituting a magnet unit disposed in spaced relationship to the conductor. The magnets are formed of a material consisting of magnetizable particles embedded in a matrix of non-magnetic material. The diaphragm may be curved and/or corrugated.
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公开(公告)号：US3795853A
公开(公告)日：1974-03-05
申请号：US3795853D
申请日：1971-12-27
发明人： WHITEHOUSE J
CPC分类号： G05D3/1427 , G03B17/14
摘要： In a velocity-controlled servomechanism having also a position sensor such as a potentiometer, the invention provides an input circuit responsive to the reaching of a predetermined position for applying a fixed voltage source as the input to the velocity servo to cause the servo actuator to decelerate, suitably as it approaches the limits of its travel.
摘要翻译： 在具有诸如电位计的位置传感器的速度控制的伺服机构中，本发明提供一种响应于到达预定位置的输入电路，用于施加固定电压源作为速度伺服的输入，以使伺服致动器减速 ，因为它接近其旅行的极限。
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公开(公告)号：US3795446A
公开(公告)日：1974-03-05
申请号：US3795446D
申请日：1971-08-12
发明人： HOUSTON J
CPC分类号： G03F7/70075 , G03F7/70583
摘要： This invention is concerned with shadow or contact printing as employed, for example in the photo-etching of substrates. An extended source of printing radiation, either in the form of an effectively annular fixed source or an orbiting source, is used to illuminate the mask under conditions of transitional FresnelFraunhofer diffraction, the effective illumination condition of the mask during an exposure causing diffraction patterns which tend to cancel each other, producing a sharply defined shadow of the mask.
摘要翻译： 本发明涉及例如在基片的光蚀刻中使用的阴影或接触印刷。 使用有效环形固定源或轨道源形式的扩展的打印辐射源，用于在过渡的菲涅尔 - 弗劳恩霍夫衍射条件下对掩模进行照明，曝光期间掩模的有效照射条件造成衍射图案 这倾向于彼此抵消，产生明显的掩模阴影。
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6.发明授权
公开(公告)号：US3784832A
公开(公告)日：1974-01-08
申请号：US3784832D
申请日：1973-01-19
发明人： SEWELL B
摘要： Apparatus for avoiding ambiguity in a quantised signal representing a pattern which is scanned by an optical detector. The apparatus operates to scan the pattern to be represented and to produce a quantised signal each quantum of which represents the major colour in each scanning element of the pattern scanned. Sampling means are provided which sample the binary signal produced by the scanning means at a rate higher than the rate at which the signal is ultimately to be quantised and the output from the sampling means controls a gating circuit which operates to prevent the signal representing the pattern from changing from a representation of one colour to a representation of another unless a predetermined number of the samples all represent one colour. This avoids any indeterminacy in the quantised signal at colour junctions where there are two or more colours present in an element being scanned, and no colour is sufficiently predominant for the detectors to unambiguously provide an output representing only that colour.
摘要翻译： 用于避免表示由光学检测器扫描的图案的量化信号中的歧义的装置。 该装置用于扫描要表示的图案，并产生量化信号，每个量子表示所扫描图案的每个扫描元件中的主要颜色。 提供了采样装置，其以比信号最终被量化的速率高的扫描装置产生的二进制信号进行采样，并且来自采样装置的输出控制门控电路，其操作以防止表示图案的信号 从一种颜色的表示改变为另一种颜色的表示，除非预定数量的样本都表示一种颜色。 这避免了在被扫描的元件中存在两种或更多种颜色的彩色结点处的量化信号中的任何不确定性，并且没有颜色足够主导以使检测器明确地提供仅表示该颜色的输出。
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公开(公告)号：US3750414A
公开(公告)日：1973-08-07
申请号：US3750414D
申请日：1971-09-16
发明人： HEFTMAN G
CPC分类号： F25D3/10
摘要： A cryogenic device incorporates a liquid storage vessel from near the bottom of which a transfer passage leads to a closed cryogenic chamber having an exhaust passage closable by a liquid level sensitive device in the closed chamber. A heat sink is in heat-exchanging relation with the transfer passage. A by-pass pipe in which a shut-off valve is intercalated connects the upper part of the liquid storage vessel to the transfer passage.
摘要翻译： 低温装置包括从其底部附近的液体存储容器，输送通道通向封闭的低温室，其具有可通过封闭室中的液位敏感装置关闭的排气通道。 散热片与传输通道处于热交换关系。 插入截止阀的旁通管将液体储存容器的上部连接到输送通道。
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8.发明授权
公开(公告)号：US3706485A
公开(公告)日：1972-12-19
申请号：US3706485D
申请日：1971-02-04
CPC分类号： C03C17/3417 , C03C17/3452 , G02B1/115
摘要： An anti-reflection multiple layer coating is formed on a transparent substrate by successive deposition of an inner layer, at least three intermediate layers and an outer layer, the optical thicknesses of the inner and outer layers being approximately lambda /4 and the overall optical thickness of the coating being approximately lambda , where lambda is a reference wavelength within the band of wavelengths over which reflection is to be reduced. The intermediate layers are formed with progressively decreasing refractive indices from the innermost to the outermost intermediate layers, either as a number of separate layers or as a single layer of graded refractive index.
摘要翻译： 通过连续沉积内层，至少三个中间层和外层，在透明基板上形成防反射多层涂层，内层和外层的光学厚度约为λ/ 4，整个光学厚度 的涂层是大约λ，其中λ是在其上要反射的波长的波段内的参考波长。 中间层形成为从最内侧到最外侧中间层逐渐减小的折射率，作为多个分开的层，或者作为单层的渐变折射率。
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公开(公告)号：US3660744A
公开(公告)日：1972-05-02
申请号：US3660744D
申请日：1971-01-11
CPC分类号： G05D3/1445
摘要： A servo control system comprises an actuator such as an electric motor which is operated in response to a demand signal and to a feedback signal representative of the actual actuator response. The feedback signal is derived by way of respective filters from two component signals representative of the actual response of the actuator and derived respectively from a transducer such as a tachometer generator coupled directly to the actuator and from the actuator itself. The filters are arranged so that the feedback signal contains a greater proportion of the component signal from the actuator within any frequency ranges in which mechanical resonance occurs in the system and a greater proportion of the component signal from the transducer within frequency ranges devoid of such mechanical resonance, so that the component signals substantially compensate each other at resonance and the resulting feedback signal is substantially free of resonance components.
摘要翻译： 伺服控制系统包括诸如电动机的致动器，该电动机响应于需求信号而被操作，以及代表实际致动器响应的反馈信号。 反馈信号通过来自表示致动器的实际响应的两个分量信号的相应滤波器导出，并且分别来自诸如直接耦合到致动器和致动器本身的转速计发生器之类的换能器。 滤波器被布置成使得反馈信号在系统内发生机械共振的任何频率范围内包含来自致动器的较大比例的分量信号，并且来自换能器的分量信号的较大比例在没有这种机械 谐振，使得分量信号在谐振时基本上彼此补偿，并且所得到的反馈信号基本上没有谐振分量。
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公开(公告)号：US3634008A
公开(公告)日：1972-01-11
申请号：US3634008D
申请日：1968-05-17
CPC分类号： H04N5/23248 , G03B17/561 , H04N5/23258 , H04N5/23261
摘要： A pickup device such as a camera or a microphone is adjustably mounted on a movable support. Signal-generating means on the support provide signals representing the movement of the support with respect to a subject of the pickup device and these signals are combined to provide a vector displacement signal. A control system mounted on the support receives the vector displacement signal and uses it to adjust the pickup device so that a predetermined relationship between the pickup device and the subject is maintained irrespective of movement of the support or the subject.
摘要翻译： 诸如相机或麦克风的拾取装置可调节地安装在可动支架上。 支撑体上的信号产生装置提供表示支撑件相对于拾取装置的被摄体移动的信号，并且这些信号被组合以提供向量位移信号。 安装在支撑件上的控制系统接收矢量位移信号，并使用它来调整拾取装置，使得拾取装置和被摄体之间的预定关系被保持而不管支架或被摄体的移动。
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