公开(公告)号：US4010382A

公开(公告)日：1977-03-01

申请号：US536374

申请日：1974-12-26

Applicant: Matsuo Nishioka ,  Shunzo Oka

Inventor： Matsuo Nishioka ,  Shunzo Oka

IPC: H01H41/08 ,  H04M1/23 ,  H03K3/00

CPC classification number: H01H41/08 ,  H04M1/23

Abstract: The present invention discloses a mechanical pushbutton type pulse generating switch for use in a telephone set comprising, in general, pulse generating switch units, a push-break return-make switch unit, and an end pulse generating switch unit. The pulse generating switch unit has a common normally closed contact attached to one side surface of an operating or push-button shaft having a polygonal cross sectional configuration and a plurality of make-break contact groups attached to the remaining side surfaces of the operating shaft and brushes or wipers disposed in opposed relation with and for contact with the common and make-break contacts respectively. The push-break return-make switch unit circuit is connected in series to a parallel circuit consisting of the pulse generating switch unit circuit and the end pulse generating switch unit circuit. The push-break return-make switch unit is so arranged that the number pulses may be generated only in the return stroke of the operating shaft after the latter has been completely depressed, and the end pulse is generated immediately before the operating shaft is returned to its initial or inoperative position and immediately before the push-break return-make switch unit is opened.

公开(公告)号：US3920943A

公开(公告)日：1975-11-18

申请号：US45372374

申请日：1974-03-22

Applicant: MAGSAT CORP

Inventor： LAPOINTE LLOYD J

IPC: H01H1/24 ,  H01H13/12 ,  H01H41/08 ,  H01H13/52 ,  H01H1/26

CPC classification number: H01H41/08 ,  H01H1/242 ,  H01H13/12

Abstract: A keyboard switch comprises a push button operator supported by a base for movement between projected and depressed positions. A contact spring carried by the push button operator electrically connects three terminals mounted in fixed position on the base when the operator is depressed. The spring cooperates with the terminals to provide a second ''''make'''' contact which occurs always after a first ''''make'''' contact. The contact spring also serves to retain the push button operator in assembly with the base. In a further embodiment, two contact springs carried by a base have free end portions which extend into the path of a push button operator supported on the base. Portions of the two contact springs define two of three terminals associated with the switch base. A third terminal mounted on the base has spaced contact surfaces thereon sequentially engaged by free ends of the two contact springs when the push button operator is depressed.

Abstract translation: 键盘开关包括由基座支撑的按钮操作器，用于在突出位置和凹陷位置之间移动。 当操作者按下时，由按钮操作器承载的接触弹簧将安装在基座上的固定位置的三个端子电连接。 弹簧与端子配合，提供第二个“制造”接触，这是在第一次“接触”之后始终发生的。 接触弹簧还用于将按钮操作器保持与基座组装。 在另一实施例中，由基座承载的两个接触弹簧具有延伸到支撑在基座上的按钮操作者的路径中的自由端部。 两个接触弹簧的部分限定与开关基座相关联的三个端子中的两个。 安装在基座上的第三端子具有间隔开的接触表面，当按钮操作器被按压时，它们由两个接触弹簧的自由端顺序接合。

公开(公告)号：US3903389A

公开(公告)日：1975-09-02

申请号：US44149674

申请日：1974-02-11

Applicant: FAUSTINI CARLO

Inventor： FAUSTINI CARLO

IPC: H01H29/18 ,  H01H41/08 ,  H03M11/22 ,  G08C9/00

CPC classification number: H03M11/22 ,  H01H29/18 ,  H01H41/08

Abstract: A self-encoding key switch is formed of a body having a well at the bottom thereof for storing a pool of mercury, a contact chamber for receiving the mercury from the well and a relief chamber for receiving the mercury from the contact chamber, and a plunger movable into the well to displace the mercury into the contact chamber to electrically connect a supply contact and a plurality of encoding contacts disposed in the contact chamber. The configurations of the body and the plunger cooperate to provide a path for the mercury to flow from the contact chamber to the relief chamber after momentary electrical connection of the supply and encoding contacts thereby providing N-key rollover. A keyboard system utilizes a plurality of the abovedescribed self-encoding key switches along with a register, and a strobe contact is disposed in the contact chamber of each key switch such that, after electrical connection is established between the supply and encoding contacts, the strobe contact is connected to trigger the register and enter the encoded data from the encoding contacts.

Abstract translation: 自编码键开关由其底部具有阱的主体形成，用于存储汞池，用于从井接收汞的接触室和用于从接触室接收汞的释放室，以及 活塞可移动到井中以将汞置换到接触室中，以电连接供应接点和设置在接触室中的多个编码触点。 主体和柱塞的构型配合以提供一种用于在电源和编码触点瞬间电连接之后汞从接触室流向释放室的路径，从而提供N键翻转。 键盘系统利用多个上述自编码键开关以及寄存器，并且在每个键开关的接触室中设置频闪触点，使得在电源和编码触点之间建立电连接之后， 连接闪光灯触点以触发寄存器，并从编码触点输入编码数据。