公开(公告)号：US3803592A

公开(公告)日：1974-04-09

申请号：US28799772

申请日：1972-09-11

Applicant: DONNELLY MIRRORS INC

Inventor： HATLEY D

IPC: H04L13/16 ,  H04L15/06

CPC classification number: H04L13/16

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US3777082A

公开(公告)日：1973-12-04

申请号：US3777082D

申请日：1972-09-08

Applicant: DONNELLY MIRRORS INC

Inventor： HATLEY D ,  WILSON H

IPC: H01H13/702 ,  H01H13/785 ,  H01H13/14

CPC classification number: H01H13/785 ,  B41J5/08 ,  H01H13/702 ,  H01H2201/026 ,  H01H2203/044 ,  H01H2229/016 ,  H01H2239/026

Abstract: A mechanically operated keyboard with key stations having a multiplicity of electrical switch contacts for providing an encoded electrical data output signal corresponding to and uniquely identifying individual key stations includes an array of movable contacts each corresponding to an individual key station and which are formed in a sheet of conducting material mounted above a corresponding array of fixed contacts to form multiple contact electrical switches for each key station of the keyboard. Each movable contact has a central member suspended to the sheet of conducting material in cantilevered fashion and includes a plurality of peripherally spaced contact fingers joined to the central member such that the contact fingers adjacent the junction of the central member to the conducting sheet will contact associated fixed contacts of a key station only after the remaining contact fingers have come into contact with their associated fixed contacts. An electrical circuit coupled to the contact fingers provides a strobe output signal only when all of the electrical switch contacts associated with a given key station have been actuated as indicated by the closure between the contact finger adjacent the junction of the central member to the conducting sheet and its associated fixed contact.

Abstract translation: 具有键台的机械操作的键盘具有多个电开关触点，用于提供对应于和唯一地识别各个关键站的编码的电数据输出信号，包括每个对应于单独的关键站并且形成在片材中的可移动触点的阵列 的导电材料安装在相应的固定触点阵列上方，以形成键盘每个键盘的多个触点电气开关。 每个可移动触点具有以悬臂方式悬挂在导电材料片上的中心构件，并且包括连接到中心构件的多个外围间隔开的接触指，使得邻近中心构件与导电片的接合的接触指接触相关联 仅在剩余的接触指与其相关联的固定触点接触之后才能进行关键站的固定触点。 耦合到接触指尖的电路仅当与给定的关键站相关联的所有电开关触点已被致动时才提供选通输出信号，如接触指状件在中心构件与导电片之间的接合处的闭合所指示的那样 及其相关的固定联系人。