利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

342 条记录 (耗时 0.015 秒)

    Noise canceling transmitter
    41.
    发明授权
    Noise canceling transmitter 失效
    噪声消除发射机

    公开(公告)号：US3830988A

    公开(公告)日：1974-08-20

    申请号：US31724172

    申请日：1972-12-21

    申请人： ROANWELL CORP

    发明人： MOL H ,  BISWAS R ,  KLOEK B

    IPC分类号： H04M1/19 ,  H04R1/32

    CPC分类号： H04M1/19 ,  H04R1/326

    摘要： A noise canceling transmitter including a directionally sensitive microphone asymmetrical with respect to a mounting flange adapted to engage a supporting surface and insertable in a telephone handset as a replacement for a directionally insensitive conventional transmitter symmetrical with respect to said supporting surface. The transmitter assembly of the invention includes an annular contact and a central contact which engages two spring contacts within the handset, regardless of the orientation of the transmitter assembly. Orientation control means are provided to limit relative rotation of the replacement assembly with respect to the handset casing so as to maintain it within a predetermined range of orientation, where its noise cancelling characteristic is effective. A retainer ring holds the mounting flange in place on the handset casing. The ring is threadedly engaged with the casing.

    摘要翻译： 一种噪声消除发射器，包括相对于适于接合支撑表面并可插入电话听筒中的安装凸缘不对称的定向敏感麦克风，作为相对于所述支撑表面对称的方向不敏感的常规发射器的替代物。 本发明的发射器组件包括环形接触件和中心接触件，其接合在手持机内的两个弹簧触点，而不管发射器组件的取向如何。 提供了定向控制装置，以限制更换组件相对于手持机壳体的相对旋转，以便将其保持在其噪声消除特性有效的预定取向范围内。 保持环将安装法兰固定在手机外壳上。 环与外壳螺纹接合。

    Cutoff device for telephone transmitter
    42.
    发明授权
    Cutoff device for telephone transmitter 失效
    电话发射机的切换装置

    公开(公告)号：US3588387A

    公开(公告)日：1971-06-28

    申请号：US3588387D

    申请日：1970-04-28

    申请人： FRANK B SMITH

    发明人： SMITH FRANK B

    IPC分类号： H04M1/03 ,  H04M1/19

    CPC分类号： H04M1/03

    摘要： A CUTOFF DEVICE FOR A TELEPHONE TRANSMITTER HAVING A LEVER ARM WITH A CAM FACE TO ENGAGE THE CONTACT SIDE OF THE TRANSMITTER, IN AN "OFF" POSITION TO THEREBY MOVE THE TRANSMITTER OUT OF ELECTRICAL CONTACT WITH AT LEAST ONE OF THE ELECTRICAL LOADS AND A SPRING BIASED TO MOVE THE TRANSMITTER BACK INTO CONTACT WITH THE ELECTRICAL LEADS IN AN "ON" POSITION.