公开(公告)号：US3928845A

公开(公告)日：1975-12-23

申请号：US53161374

申请日：1974-12-11

Applicant: RCA CORP

Inventor： CLARK ROBERT JOHN

IPC: G09G5/26 ,  G06F3/14

CPC classification number: G09G5/26

Abstract: The versatility of a character generator system, suitable for use in a television broadcast controller, is enhanced by employing a read/write character generator memory of a given overall storage capacity, rather than a ROM, and organizing the memory to store symbols in any selected single one of a given number of different predetermined dot-matrix sizes. Logic means responsive to the selected dot-matrix size are provided for digitally generating symbols for display on a display device exhibiting a television raster scan employing the particular alphabet of symbols then stored in the memory in the selected dot-matrix size.

Abstract translation: 适用于电视广播控制器的字符发生器系统的多功能性通过采用给定总体存储容量而不是ROM的读/写字符发生器存储器来增强，并组织存储器以将符号存储在任何选定的 给定数量的不同预定点阵尺寸中的单个。 提供了响应于所选择的点阵尺寸的逻辑装置，用于数字地产生用于在显示装置上显示符号的符号，该显示装置呈现采用所选择的点阵尺寸存储在存储器中的符号的特定字母表的电视光栅扫描。

公开(公告)号：US3926637A

公开(公告)日：1975-12-16

申请号：US40340873

申请日：1973-10-04

Applicant: RCA CORP

Inventor： BARTOLINI ROBERT ALFRED ,  BLOOM ALLEN

IPC: G03F7/00 ,  G03C1/76 ,  G03C3/00 ,  G03C5/04

CPC classification number: G03F7/001 ,  Y10S430/109 ,  Y10S430/124

Abstract: Holographic recording media which form permanent holograms are prepared from Alpha -diketones which are capable of intermolecular hydrogen atom abstraction dissolved in a transparent, cured acrylic polyester host.

公开(公告)号：US3925238A

公开(公告)日：1975-12-09

申请号：US48408674

申请日：1974-06-28

Applicant: RCA CORP

Inventor： GAVRILOVIC DRAGAN MILAN

IPC: C07C45/46 ,  C07C49/813 ,  C07C51/15 ,  C07C255/53 ,  C09K19/00 ,  C09K19/20 ,  C09K3/34 ,  C07C79/46 ,  C07C121/74

CPC classification number: C07C255/00 ,  C07C45/46 ,  C07C49/813 ,  C07C51/15 ,  C09K19/2007 ,  C07C63/331

Abstract: or alkylcarbonato

WHEREIN X can be alkyl (R-), alkoxy (RO-), acyloxy


wherein R is an alkyl group of 1 to 10 carbon atoms and Y is a cyano or nitro group, have positive dielectric anisotropy and are useful in electrooptic cells which comprise a thin liquid crystal layer between two closely spaced parallel electrodes.

D R A W I N G
Nematic liquid crystal compounds of the formula:

公开(公告)号：US3923566A

公开(公告)日：1975-12-02

申请号：US26483372

申请日：1972-06-21

Applicant: RCA CORP

Inventor： LAW HAROLD BELL

IPC: C23F1/04 ,  H01J9/14 ,  H01J29/07 ,  C23F1/02

CPC classification number: C23F1/04 ,  H01J9/142 ,  H01J29/07 ,  Y10T29/49812

Abstract: A metal sheet is embossed by a special embossing tool to provide regions in the sheet of minimum thickness at the intended aperture locations thereon. Following embossing, the sheet is shaped into a desired mask contour and the embossed side of the sheet is coated with a stop-off substance to prevent subsequent removal of material from that side. The regions of minimum thickness are then removed, such as by etching the uncoated side of the sheet, to provide the apertures.

Abstract translation: 通过特殊压花工具对金属板进行压花，以在其上的预定孔径位置处提供最小厚度的片材区域。 在压花之后，将片材成形为期望的掩模轮廓，并且片材的压纹侧涂覆有停止物质以防止随后从该侧移除材料。 然后去除最小厚度的区域，例如通过蚀刻片材的未涂覆侧面以提供孔。

公开(公告)号：US3923189A

公开(公告)日：1975-12-02

申请号：US37851673

申请日：1973-07-12

Applicant: RCA CORP

Inventor： FAULKNER RICHARD DALE

IPC: H01J5/26 ,  H01J17/18 ,  H01J61/36

CPC classification number: H01J5/26 ,  H01J2893/0043 ,  Y10T403/21 ,  Y10T403/213

Abstract: A seal is provided for sealing a quartz envelope to a glass stem in an electron tube. The seal includes an intermediate annular metallic stress relieving ring disposed between the quartz envelope and the glass stem. The annular metallic stress relieving ring has: a radial flange portion, plated with a noble metal and sealed to a silver plated surface of the quartz envelope by a silver chloride cement; a supporting thin narrow relieving portion connected and extending substantially perpendicular to the radial flange portion; and a stem sealing portion which is sealed to the glass stem by conventional sealing techniques and which is interconnected with the annular stress relieving portion.

Abstract translation: 提供了用于将石英外壳密封到电子管中的玻璃杆的密封件。 密封件包括设置在石英罩和玻璃杆之间的中间环形金属应力消除环。 环形金属应力消除环具有：镀有贵金属的径向凸缘部分，并通过氯化银胶水密封到石英壳的镀银表面; 连接并且基本上垂直于所述径向凸缘部分延伸的支撑薄窄缓冲部分; 以及杆密封部分，其通过常规密封技术被密封到玻璃杆，并且与环形应力消除部分相互连接。

公开(公告)号：US3922395A

公开(公告)日：1975-11-25

申请号：US41432373

申请日：1973-11-09

Applicant: RCA CORP

Inventor： SMITH BRADFORD KNOX

IPC: H01J9/227 ,  B32B3/10 ,  B05D3/02

CPC classification number: H01J9/2278 ,  H01J9/227 ,  Y10T428/24322

Abstract: A method for reducing the sizes of apertures in a ferrous-metal mask including the steps of coating the mask with a water-basedcoating composition containing a polyvinyl alcohol polymeric material which is water-insolubilized when ferrous or ferric ions are present, and a water-soluble passivator for ferrous-metal surfaces, such as sodium nitrite, and then drying the coating. Inclusion of a passivator in the coating composition reduces or eliminates the formation of localized coating discontinuities, usually comet shaped, in the coating.

Abstract translation: 一种用于减小黑色金属掩模中孔径尺寸的方法，包括以下步骤：用含有存在亚铁或三价铁离子的水不溶的聚乙烯醇聚合物材料的水性涂料组合物涂覆掩模;以及 用于黑色金属表面的水溶性钝化剂，如亚硝酸钠，然后干燥涂层。 在涂料组合物中包含钝化剂减少或消除了涂层中通常是彗星形状的局部涂层不连续性的形成。

公开(公告)号：US3921090A

公开(公告)日：1975-11-18

申请号：US52375974

申请日：1974-11-14

Applicant: RCA CORP

Inventor： WHEATLEY JR CARL FRANKLIN ,  WITTLINGER HAROLD ALLEN

IPC: H03G3/10 ,  G06G7/163 ,  H03F3/45

CPC classification number: H03F3/45071

Abstract: An operational transconductance amplifier comprises first and second transistors connected in a gain-controlled emitter-coupled differential amplifier configuration and provided active collector loads by the input ports of a first and a second current mirror amplifiers, respectively. The balanced signals appearing at the output ports of the first and the second current mirror amplifiers in response to the balanced signal variations in the collector currents of the first and second transistors are converted to single-ended form by a third current mirror amplifier having its input and output ports connected to the output ports of the first and second current mirror amplifiers, respectively. Improved high-frequency operation of the gain controllable operational transconductance amplifier as an analog multiplier is obtained by applying common mode currents to the input ports of the first and second current mirror amplifiers. The responses to these common mode currents counteract and cancel each other in the output signal from the operation transconductance amplifier.

Abstract translation: 运算跨导放大器包括以增益控制的发射极耦合差分放大器配置连接的第一和第二晶体管，并分别由第一和第二电流镜放大器的输入端口提供有源集电极负载。 响应于第一和第二晶体管的集电极电流的平衡信号变化而出现在第一和第二电流镜放大器的输出端口处的平衡信号由具有其输入的第三电流镜放大器转换成单端形式 以及分别连接到第一和第二电流镜放大器的输出端口的输出端口。 通过将共模电流施加到第一和第二电流镜放大器的输入端口来获得增益可控运算跨导放大器作为模拟乘法器的改进的高频操作。 这些共模电流的响应在来自运算跨导放大器的输出信号中相互抵消并相互抵消。

公开(公告)号：US3921010A

公开(公告)日：1975-11-18

申请号：US38972673

申请日：1973-08-20

Applicant: RCA CORP

Inventor： GRIFFIN ROGER THOMAS

IPC: H03D1/06 ,  G01R19/04 ,  G01R19/165 ,  G04C3/10 ,  G04C3/14 ,  G04C13/11 ,  G04G99/00 ,  H03K5/1532 ,  H03K5/153 ,  H03K19/38 ,  H03K19/40

CPC classification number: G04G99/00 ,  G01R19/04 ,  G01R19/16519 ,  G04C3/143 ,  G04C13/11 ,  H03K5/1532

Abstract: A feedback circuit between the output and input terminals of a complementary-symmetry, metal-oxide-semiconductor (CMOS) circuit, such as an inverter circuit, quiescently biases the circuit at a point on its transfer characteristic such that a slight additional change in voltage level will cause the circuit to change state. Input signal is applied to the input terminal through a coupling element such as a capacitor. When this input signal starts to decrease after reaching its peak voltage value in a given sense, it causes the feedback circuit to open and the CMOS circuit to change to its second state. In response to each following peak of the same sense, the feedback loop momentarily closes then opens and concurrently the circuit momentarily reverts to its initial state then switches to its second state.

Abstract translation: 在互补对称的金属氧化物半导体（CMOS）电路（例如逆变器电路）的输出端和输入端之间的反馈电路在其传输特性的某一点静态地偏置电路，使得电压稍微的附加变化 电平将导致电路改变状态。 输入信号通过诸如电容器的耦合元件施加到输入端。 当该输入信号在给定意义上达到其峰值电压值之后开始降低时，使得反馈电路打开，并且CMOS电路变为其第二状态。 响应于相同感测的每个后续峰值，反馈环路瞬间闭合然后打开，同时电路暂时恢复到其初始状态，然后切换到其第二状态。

公开(公告)号：US3919649A

公开(公告)日：1975-11-11

申请号：US41135673

申请日：1973-10-31

Applicant: RCA CORP

Inventor： LOGEMANN JR HUGO

IPC: G06G7/20 ,  H03K4/02

CPC classification number: G06G7/20 ,  H03K4/026

Abstract: Apparatus for generating a staircase test signal includes means for generating a staircase waveform wherein each step differs in value by the factor x. This generated waveform is then applied selectively to a square root x attenuator circuit to change the value of a portion of each step by the factor square root x, thereby producing a waveform wherein each of the resultant steps differ in value by the factor square root x.

Abstract translation: 用于产生楼梯测试信号的装置包括用于产生阶梯波形的装置，其中每个步长的值与系数x不同。 然后将该生成的波形选择性地施加到2ROOT x衰减器电路，以将每个步骤的一部分的值改变因子2ROOT x，从而产生波形，其中每个所得步骤的值均因子2ROOT x而不同。

公开(公告)号：US3919484A

公开(公告)日：1975-11-11

申请号：US44726674

申请日：1974-03-01

Applicant: RCA CORP

Inventor： MAXEMCHUK NICHOLAS FRANK

IPC: H04L12/42 ,  H04L25/24 ,  H04J3/08

CPC classification number: H04L25/242 ,  H04L12/422

Abstract: A loop controller for a time division multiplexed loop communications system. The loop controller is connected in series with a plurality of data processors in a loop configuration. The loop controller provides a certain number of time slots in a frame. The data processors communicate with each other in channels comprising two time slots. Each data processor must acquire the same channel in each frame. The loop controller provides an adaptive delay function such that the total delay around the loop is a multiple of the time slots forming a frame to insure that the data processors acquire the same channel in each frame. In addition, the loop controller re-times the signals circulating on the loop and detects and counts violations of the modulation rule utilized by the signals circulating on the loop.

Abstract translation: 一种用于时分复用回路通信系统的回路控制器。 环路控制器以环路配置与多个数据处理器串联连接。 环路控制器在帧中提供一定数量的时隙。 数据处理器在包括两个时隙的信道中彼此通信。 每个数据处理器必须在每个帧中获得相同的通道。 环路控制器提供自适应延迟功能，使得环路周围的总延迟是形成帧的时隙的倍数，以确保数据处理器在每帧中获取相同的信道。 此外，环路控制器重新循环在循环上循环的信号，并检测和计数违反循环中循环的信号所使用的调制规则。