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    Keypad de-bouncing apparatus and method
    32.
    发明授权
    Keypad de-bouncing apparatus and method 有权
    键盘脱扣装置及方法

    公开(公告)号：US07809867B2

    公开(公告)日：2010-10-05

    申请号：US11940160

    申请日：2007-11-14

    Applicant: Allen Erik Sjogren ,  Eric Nerdrum

    Inventor： Allen Erik Sjogren ,  Eric Nerdrum

    IPC: G06F13/12 ,  H03K17/94

    CPC classification number: H03M11/20 ,  H01H2201/002

    Abstract: An apparatus and method for de-bouncing keypad inputs is disclosed including interrupting a processor upon detecting a key press, reading input signals from the key pad to determine an initial port value and starting a timer. A keypad interrupt is disabled and processing resumes until expiration of the timer. The timer interrupts the processor and the input signals are read a second time and combined with the initial port value to determine a key identifier. The timer is started again and processing resumes. Upon expiration of the timer the processor checks for key release. If release is not detected, the timer is again started. If release occurs, the timer is disabled and the keypad interrupt is enabled.

    Abstract translation: 公开了一种用于消除键盘输入的装置和方法，包括在检测到按键时中断处理器，从键盘读取输入信号以确定初始端口值并启动定时器。 键盘中断被禁用，处理恢复到定时器到期。 定时器中断处理器，并且第二次读取输入信号并与初始端口值组合以确定密钥标识符。 定时器再次启动，处理恢复。 定时器到期后，处理器检查密钥释放。 如果没有检测到释放，则定时器再次启动。 如果发生释放，定时器被禁止，并且键盘中断被使能。

    Membrane switch having spacer posts
    34.
    发明授权
    Membrane switch having spacer posts 失效
    具有间隔柱的膜开关

    公开(公告)号：US4463232A

    公开(公告)日：1984-07-31

    申请号：US387020

    申请日：1982-06-10

    Applicant: Masao Takakuwa

    Inventor： Masao Takakuwa

    IPC: H01H13/702 ,  H01H13/785 ,  H01H13/80 ,  H01H13/70

    CPC classification number: H01H13/785 ,  H01H13/702 ,  H01H13/80 ,  H01H2201/002 ,  H01H2201/032 ,  H01H2209/074 ,  H01H2221/058

    Abstract: Disclosed is a pushbutton-type switch such as used on the keyboard of a small-size electronic computer. The switch includes a main member carrying a movable contact and one or more projections or posts of lesser height than the movable contact. Upon application of finger pressure to the main member, the movable contact is brought into uniform contact with a fixed contact therebelow without chattering, by virtue of the supporting action of the posts.

    Abstract translation: 公开了一种按钮式开关，例如在小型电子计算机的键盘上使用。 开关包括承载可移动触点的主构件和比可动触点更小的高度的一个或多个突起或柱。 在对主体施加手指压力的情况下，由于柱的支撑作用，使活动触点与其上的固定触点均匀地接触而不会颤动。

    Electrical switch assembly
    37.
    发明授权
    Electrical switch assembly 失效
    电气开关总成

    公开(公告)号：US4156802A

    公开(公告)日：1979-05-29

    申请号：US844598

    申请日：1977-10-25

    Applicant: Michael N. Gilano ,  James C. Hayes

    Inventor： Michael N. Gilano ,  James C. Hayes

    IPC: H01H13/14 ,  H01H13/52 ,  H01H13/705 ,  H01H13/80 ,  H01H13/70

    CPC classification number: H01H13/80 ,  H01H13/14 ,  H01H13/52 ,  H01H13/705 ,  H01H2201/002 ,  H01H2203/00 ,  H01H2203/02 ,  H01H2203/054 ,  H01H2215/006 ,  H01H2217/008 ,  H01H2217/01 ,  H01H2221/026 ,  H01H2221/028 ,  H01H2221/03 ,  H01H2221/05 ,  H01H2221/064 ,  H01H2227/028 ,  H01H2227/032 ,  H01H2231/022 ,  H01H2233/022 ,  H01H2233/098 ,  H01H2233/102 ,  H01H2235/002 ,  H01H2235/004 ,  H01H2235/018

    Abstract: An inexpensive, yet highly reliable, electrical switch contact assembly with excellent human factors considerations includes an electrical contact assembly having a plurality of switch positions, a cover plate disposed adjacent the switch contact assembly with an aperture for each switch position, and at each switch position an apertured key, a follower disposed within the key aperture, a cap containing the follower within the key aperture and key and follower springs biasing the key and follower respectively to provide separate and independent control over key actuation and switch contact closure forces. A contact engagement post of the follower may be accurately positioned above a switch contact notwithstanding variations in spring characteristics an a curvilinear engagement surface assures optimum distributed switch closure pressure for high reliability switch actuation. Switch contact patterns with oppositely disposed and interdigitated circularly and radially extending portions assure the security of multiple switch closure engagements.

    Abstract translation: 具有优异的人为因素考虑的廉价但高度可靠的电开关触点组件包括具有多个开关位置的电触点组件，与开关触点组件相邻设置的盖板，每个开关位置具有孔，并且在每个开关位置 多孔密钥，设置在密钥孔内的随动件，包含键孔内的随动件的盖和分别偏置键和从动件的键和从动弹簧，以提供对键致动和开关接触闭合力的独立且独立的控制。 随动件的触点接合柱可以精确地定位在开关触点上方，尽管弹簧特性的变化，曲线接合表面确保了用于高可靠性开关致动的最佳分布式开关闭合压力。 切换具有相对布置和交错的圆形和径向延伸部分的接触图案确保了多个开关闭合接合的安全性。

    Keypad de-bouncing apparatus and method
    39.
    发明授权
    Keypad de-bouncing apparatus and method 失效
    键盘脱扣装置及方法

    公开(公告)号：US08407381B2

    公开(公告)日：2013-03-26

    申请号：US12881032

    申请日：2010-09-13

    Applicant: Allen Erik Sjogren ,  Eric Nerdrum

    Inventor： Allen Erik Sjogren ,  Eric Nerdrum

    IPC: G06F13/12 ,  H04M3/00

    CPC classification number: H03M11/20 ,  H01H2201/002

    Abstract: An apparatus and method for de-bouncing keypad inputs is disclosed including interrupting a processor upon detecting a key press, reading input signals from the key pad to determine an initial port value and starting a timer. A keypad interrupt is disabled and processing resumes until expiration of the timer. The timer interrupts the processor and the input signals are read a second time and combined with the initial port value to determine a key identifier. The timer is started again and processing resumes. Upon expiration of the timer the processor checks for key release. If release is not detected, the timer is again started. If release occurs, the timer is disabled and the keypad interrupt is enabled.

    Abstract translation: 公开了一种用于消除键盘输入的装置和方法，包括在检测到按键时中断处理器，从键盘读取输入信号以确定初始端口值并启动定时器。 键盘中断被禁用，处理恢复到定时器到期。 定时器中断处理器，并且第二次读取输入信号并与初始端口值组合以确定密钥标识符。 定时器再次启动，处理恢复。 定时器到期后，处理器检查密钥释放。 如果没有检测到释放，则定时器再次启动。 如果发生释放，定时器被禁止，并且键盘中断被使能。

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