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公开(公告)号：US5418530A
公开(公告)日：1995-05-23
申请号：US960571
申请日：1992-10-13
申请人： Earl W. Moore , Ronald R. Brown
发明人： Earl W. Moore , Ronald R. Brown
IPC分类号： H01H13/705 , H03M11/00 , H01H13/00
CPC分类号： H01H13/705 , H01H2221/026 , H01H2221/062
摘要： Several unique features of a key switch housing and plunger are disclosed which may be employed to provide a keyboard having improved noise and feel characteristics. A system of key plunger up-stops is used to reduce the noise produced by key return while preventing removal of the plunger from the chimney of the switch housing. The system comprises a pair of relatively weak and resilient up-stops which have a relatively small contact area which act to restrict upward movement of the keycap/plunger combination during normal operation and a pair of relatively strong and rigid up-stops which do not contact the switch housing during normal keyboard use, but which prevent the pull-out of the key switch plunger from the chimney of the key switch housing. An additional feature disclosed is a unique key switch housing and plunger design which minimizes key wobble while providing smooth key action. In contrast to the devices of the prior art, the plunger and interior wall of the chimney of the key switch housing are provided with approximately equal tapers which tapers are aligned so as to provide bearing surfaces which are approximately parallel to one another when the key switch plunger is in the "up" (i.e., nondepressed) position. The direction of the tapers is chosen such that key depression results in progressively greater tolerance between the bearing surfaces.
摘要翻译： 公开了一种钥匙开关壳体和柱塞的几个独特的特征，其可用于提供具有改进的噪音和感觉特性的键盘。 使用关键柱塞上止动器的系统来减少由钥匙返回产生的噪音，同时防止柱塞从开关壳体的烟囱移除。 该系统包括一对相对较弱和弹性的上止动件，其具有相对较小的接触面积，其在正常操作期间起作用以限制键帽/柱塞组合件的向上运动，以及一对不接触的相对坚固且刚性的上止动件 在正常的键盘使用期间开关壳体，但是防止钥匙开关柱塞从钥匙开关壳体的烟囱拔出。 所公开的另一个特征是独特的钥匙开关壳体和柱塞设计，其在提供平滑的按键动作的同时使关键摆动最小化。 与现有技术的装置相比，钥匙开关壳体的烟囱的柱塞和内壁具有大致相等的锥度，其锥度对齐，以便当钥匙开关处提供大致彼此平行的支承表面 柱塞处于“向上”（即非压缩）位置。 选择锥度的方向使得键按压导致轴承表面之间逐渐增大的公差。
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公开(公告)号：US5121507A
公开(公告)日：1992-06-16
申请号：US595142
申请日：1990-10-10
申请人： Ronald R. Brown
发明人： Ronald R. Brown
摘要： An accessory (10) that can be connected to, and detached from, various forms of headwear comprising a means of attaching units (20) such that the accessory (10) and the headwear forms a continuous surface. Such a continuous surface increases coverage to the neck and ear areas.
摘要翻译： 可以连接到各种形式的头饰并从其分离的附件（10），包括附接单元（20）的装置，使得附件（10）和头饰形成连续表面。 这种连续的表面增加了对颈部和耳朵区域的覆盖。
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公开(公告)号：US06788678B1
公开(公告)日：2004-09-07
申请号：US09454930
申请日：1999-12-03
IPC分类号： H04L1250
CPC分类号： H04Q3/58 , H04Q11/0442 , H04Q2213/13174 , H04Q2213/13176 , H04Q2213/13203 , H04Q2213/13209 , H04Q2213/13216 , H04Q2213/1336 , H04Q2213/13381
摘要： In accordance with the invention, an interface between an incumbent local exchange carrier's central office terminal and a competitive local exchange carrier's remote terminal is provided by an Integrated Services Digital Network interconnection. Such a connection provides two basic data channels of 64 Kbps each and at least one utility channel. The ISDN signal can be carried over a single wire pair. The interface may be used to interconnect one or two digital channels. The channel units may be designed to remove the robbed bits from the data channels and place them in the utility channels. Further, the utility channel may be employed to transmit frame phasing information so that the networks can synchronize their robbed bit signaling so that both networks use the same bit positions for robbed bit signaling thus minimizing data bandwidth reduction due to robbed bit signaling.
摘要翻译： 根据本发明，现有的本地交换运营商的中心局终端和竞争性本地交换运营商的远程终端之间的接口由综合业务数字网络互连提供。 这样的连接提供了每个64Kbps的两个基本数据信道和至少一个效用信道。 ISDN信号可以通过单线对进行。 该接口可以用于互连一个或两个数字信道。 信道单元可以被设计为从数据信道中移除被抢占的位并将它们放置在公共信道中。 此外，可以采用效用信道来发送帧定相信息，使得网络可以同步其抢夺比特信令，使得两个网络对于抢占比特信令使用相同的比特位置，从而最小化由于抢占比特信令引起的数据带宽降低。
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