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107 条记录 (耗时 0.015 秒)

    Teletypewriter line keyer with switching current regulator
    1.
    发明授权
    Teletypewriter line keyer with switching current regulator 失效
    带切换电流调节器的电报打线机

    公开(公告)号：US4355403A

    公开(公告)日：1982-10-19

    申请号：US44652

    申请日：1979-06-01

    申请人： John W. Spaniol ,  Ronald E. Tollum ,  Julius A. Barthelme

    发明人： John W. Spaniol ,  Ronald E. Tollum ,  Julius A. Barthelme

    IPC分类号： H04L13/16 ,  G05F1/40 ,  H03K1/14

    CPC分类号： H04L13/16

    摘要： A teletypewriter line keyer with a switching current regulator responsive to a floating, loop current powered voltage comparator used as a loop current monitor. The line keyer, which may have positive and negative line current keying, uses a single current monitor to control positive and negative current regulators responsive to the positive and negative keying respectively. The switching regulators operate within a relatively narrow band centered around the nominal signaling current, with filtering being provided for ripple control. The circuit may also include a keying detector and open loop detector for system monitoring.

    摘要翻译： 具有响应于用作环路电流监视器的浮动环路电流电压比较器的开关电流调节器的电传打字机线路键控器。 可以具有正和负线电流键控的线路键控器使用单个电流监视器来分别响应于正和负键控来控制正和负电流调节器。 开关稳压器在以标称信号电流为中心的相对较窄的频带内工作，并提供滤波用于纹波控制。 电路还可以包括用于系统监视的键控检测器和开环检测器。

    Coding keyboard
    2.
    发明授权
    Coding keyboard 失效
    编码键盘

    公开(公告)号：US3828910A

    公开(公告)日：1974-08-13

    申请号：US30628672

    申请日：1972-11-14

    申请人： SAGEM

    发明人： GLAY G

    IPC分类号： H04L13/16 ,  H04M1/23 ,  B41J5/08

    CPC分类号： H04M1/23 ,  H04L13/16

    摘要： Coding keyboard for a teleprinter. It comprises a central plate, a lower plate which is a printed circuit panel and an upper plate forming a cover, these three plates being parallel to one another. The central plate has holes in which are inserted pushbutton guides. Push-buttons may slide in said guides such that, when a key connected to a push-button is lowered, a magnet fixed to the push-button controls the closing of a switch with flexible blades fixed on the upper face of the printed circuit panel.

    Keyboard and digital circuit therefor
    3.
    发明授权
    Keyboard and digital circuit therefor 失效
    键盘和数字电路

    公开(公告)号：US3803592A

    公开(公告)日：1974-04-09

    申请号：US28799772

    申请日：1972-09-11

    申请人： DONNELLY MIRRORS INC

    发明人： HATLEY D

    IPC分类号： H04L13/16 ,  H04L15/06

    CPC分类号： H04L13/16

    摘要： In a mechanically operated keyboard employing keys having a multiplicity of electrical switch contacts for providing an encoded electrical output signal corresponding to and uniquely identifying individual key stations; a digital circuit provides a strobe output signal only when all of the electrical switch contacts associated with a given key station have been actuated. In one digital circuit for providing a strobe output signal, each switch contact is assigned a digital weight, and a strobe output is generated only when a predetermined digital count indicative of complete switch closures has occurred. In another digital circuit, the number of closures of switch contacts of a key station are compared in a digital comparator with stored closure signals from a preceding key station actuation to develop a strobe output signal only when the signals are different thereby indicating that a different key station has been actuated or the same key station re-actuated. In still another embodiment of the digital circuit employed with the keyboard, a read-only-memory is employed to detect the number of closures and provides an encoded output for each key station which uniquely identifies the key station and simultaneously produces an enable signal for the generation of a strobe pulse, only when complete contact closures have been effected.

    摘要翻译： 在机械操作的键盘中，使用具有多个电开关触点的键，用于提供对应于并唯一地识别各个关键站的编码电输出信号; 只有当与给定的关键站相关联的所有电开关触点已被致动时，数字电路才提供选通输出信号。 在用于提供选通输出信号的一个数字电路中，每个开关触点被分配数字权重，并且仅当指示完成开关闭合的预定数字计数发生时才产生选通输出。 在另一个数字电路中，将数字比较器中的开关触点的闭合次数与来自前一关键站致动的存储的闭合信号进行比较，以仅在信号不同时才产生选通输出信号，从而指示不同的键 站已启动或相同的关键站重新启动。 在与键盘一起使用的数字电路的又一个实施例中，采用只读存储器来检测关闭的数量，并且为每个关键站提供编码的输出，唯一地标识关键站并同时产生用于 只有当完成了触点闭合时才产生选通脉冲。

    Keyboard machine with sequentially responsive printing means
    5.
    发明授权
    Keyboard machine with sequentially responsive printing means 失效
    带有顺序打印机的键盘机

    公开(公告)号：US3610389A

    公开(公告)日：1971-10-05

    申请号：US3610389D

    申请日：1968-09-09

    申请人： OLIVETTI & CO SPA

    发明人： CORTONA ALESSANDRO ,  GINDRI ERIDIANO

    IPC分类号： B41J7/90 ,  B41J25/02 ,  H04L13/16 ,  B41J3/00

    CPC分类号： B41J25/02 ,  B41J7/90 ,  H04L13/16

    摘要： An apparatus for automatically setting a sequence of code combinations in a teleprinter or other keyboard machine comprising a series of setting members, each arranged, when preset by a movement in a first direction to initiate a cycle of operation of a motor-driven universal member which drives the preset member in a second direction to set a group of code bars in accordance with the code combination pertaining to the said member and then permits the said member to be restored resiliently to its inoperative position, and a plurality of keys for presetting corresponding setting members, one of these said corresponding setting members being connected to a further one of the setting members by a linkage which presets the further setting member when the said one member is driven in the said second direction.

    Keyboard using switches having light obstructing elements
    7.
    发明授权
    Keyboard using switches having light obstructing elements 失效
    键盘使用具有光遮挡元件的开关

    公开(公告)号：US3579047A

    公开(公告)日：1971-05-18

    申请号：US3579047D

    申请日：1969-02-13

    申请人： DIEHL FA

    发明人： STURM KONRAD ,  BECKER WILLY ,  TIMM HEINZ ,  RUMMEL KARLHEINZ

    IPC分类号： G06C7/02 ,  H03K17/969 ,  H04L13/16 ,  G06M7/00

    CPC分类号： H04L13/16 ,  G06C7/02 ,  H03K17/969

    摘要： Keyboard apparatus for producing switch signal combinations in a code used in office machines includes a number of individual light beam producing means corresponding in number to the number of channels used in the code, and a number of individual keys, each of which carries one or more light-obstructing barriers, the number and position of the barriers on a particular key corresponding to the number and position of the channels used in the machine code system to indicate the signal combination associated with the key so that when a key is depressed the light beams will be selectively interrupted to thereby form a coded signal representing the depressed key.