Power supply apparatus for electric discharge machine
    55.
    发明授权
    Power supply apparatus for electric discharge machine 失效
    放电机电源装置

    公开(公告)号:US5903067A

    公开(公告)日:1999-05-11

    申请号:US993628

    申请日:1997-12-18

    IPC分类号: B23H1/02 B23H7/04

    摘要: A power supply apparatus for an electric discharge machine comprises a first power supply device comprising a high impedance circuit connected in series to a DC power supply unit and a second power supply device comprising a low impedance circuit, intermittently applies a pulse voltage to a space between a tool electrode and a workpiece opposite to the tool electrode with a specified gap therebetween from the first power supply device, and also supplies a machining current to the space from the second power supply device after generation of electric discharge, in which the second power supply device provides therein a plurality units of switching devices connected in parallel to each other, the number of ON-units switching circuit for controlling the number of switching devices to be simultaneously turned ON, and an ON-time control unit for variably controlling ON-time of the switching devices.

    摘要翻译: 一种用于放电机的电源装置包括:第一电源装置,包括与DC电源单元串联连接的高阻抗电路和包括低阻抗电路的第二电源装置,间歇地将脉冲电压施加到 工具电极和与工具电极相对的工件,其间具有从第一电源装置之间的特定间隙,并且在产生放电之后还从第二电源装置向空间提供加工电流,其中第二电源 装置在其中提供并联连接的多个开关装置单元,用于控制同时导通的开关装置的数量的导通单元切换电路的数量,以及用于可变地控制接通时间的接通时间控制单元 的开关装置。

    Bonding device and bonding process for fabricating an interior component
    57.
    发明授权
    Bonding device and bonding process for fabricating an interior component 失效
    用于制造内部部件的接合装置和接合工艺

    公开(公告)号:US5431768A

    公开(公告)日:1995-07-11

    申请号:US97929

    申请日:1993-07-28

    摘要: A bonding device and bonding process for a surface skin member of a vehicle interior component which can reliably fold back and secure a peripheral part of a surface skin member onto the reverse surface of a core member without involving any positional deviation between the core member and the surface skin member even when the width of the peripheral part is small. A block of elastic material is used for a lower die for mounting a surface skin member in a bonding station, and slide bars are arranged around the lower die in a peripheral part folding back station disposed adjacent to the bonding station for provisionally shaping the peripheral part of the surface skin member. Further, vertically moveable bars are arranged around an upper die for mounting the core member thereon for pressing the peripheral part of the surface skin member which has been provisionally shaped against the reverse surface of the core member.

    摘要翻译: 一种用于车辆内部部件的表皮部件的接合装置和接合工艺,其可以可靠地折回并将表面表皮部件的周边部分固定在芯部件的反面上,而不会引起芯部件和芯部件之间的任何位置偏差 即使当周边部分的宽度小时,表面皮肤部件也是如此。 一块弹性材料用于下模,用于在接合台上安装表面皮肤部件,并且在邻近粘接台设置的周边部分折回站中的下模上设置有滑动条,用于临时成形周边部分 的表皮成分。 此外,垂直移动杆围绕上模布设置,用于将芯构件安装在其上,用于将已经临时成形的表面皮肤构件的周边部分压靠在芯构件的相反表面上。

    Electrical discharge machine with secondary electrode for corrosion
prevention
    58.
    发明授权
    Electrical discharge machine with secondary electrode for corrosion prevention 失效
    具有二次电极的放电机用于防腐蚀

    公开(公告)号:US5422455A

    公开(公告)日:1995-06-06

    申请号:US13049

    申请日:1993-02-04

    IPC分类号: B23H1/00 B23H1/02 B23H7/04

    CPC分类号: B23H7/04 B23H1/022

    摘要: An electric discharge machining apparatus of the travelling wire or sink type includes at least one secondary electrode which is immersed in the dielectric at least during machining. A microvoltage power supply is used to create a micropotential difference between the workpiece and the secondary electrode so that the workpiece becomes a negative pole. Maintaining this arrangement both during machining and non-machining times prevents the workpiece from being subjected to positive-pole oxidation.

    摘要翻译: 行走线或水槽式放电加工装置至少包括至少一个辅助电极,其至少在加工过程中浸入电介质中。 使用微电压电源来产生工件和次级电极之间的微小差异,使得工件变为负极。 在加工和非加工时间期间保持这种布置可以防止工件受到正极氧化。

    Automatic gain control in a loudspeaker telephone set
    60.
    发明授权
    Automatic gain control in a loudspeaker telephone set 失效
    扬声器电话机中的自动增益控制

    公开(公告)号:US4764954A

    公开(公告)日:1988-08-16

    申请号:US834412

    申请日:1986-02-28

    IPC分类号: H04M1/60 H04M9/10 H04M9/08

    CPC分类号: H04M9/10

    摘要: A loud-speaker telephone set includes a switching control circuit to attenuate the incoming signal, during transmission, and to attenuate the outgoing signal, during reception, in order to prevent feedback from the loud-speaker to the microphone. An automatic gain control circuit is added which detects at least one of the incoming signal level and the outgoing signal level and which adjusts the attenuation of both the incoming and outgoing signals so as to reduce the attenuation change between reception and transmission below 20 dB and eliminate the unpleasant sensation, to a user, of large attenuation changes.

    摘要翻译: 扬声器电话机包括切换控制电路,用于在传输期间衰减输入信号,并且在接收期间衰减输出信号,以便防止从扬声器到麦克风的反馈。 增加了自动增益控制电路,其检测输入信号电平和输出信号电平中的至少一个,并且调整输入和输出信号的衰减,以便将接收和传输之间的衰减变化减小到低于20dB并消除 令人不快的感觉,给用户,大的衰减变化。