公开(公告)号：US4646858A

公开(公告)日：1987-03-03

申请号：US725051

申请日：1985-04-19

申请人： Robert M. Strickland

发明人： Robert M. Strickland

IPC分类号： E21B10/18 ,  E21B10/20 ,  E21B10/23 ,  E21B10/24 ,  E21B21/00

CPC分类号： E21B10/23 ,  E21B10/18 ,  E21B10/20 ,  E21B21/002

摘要： An earth boring bit of the "air cooled" type that includes an air passage access system, including a generally vertical passage with an opening on the exterior of the leg or in the shank cavity that forms part of the body of the bit. This vertical passage is accessible through the opening by removal of a core that expands or retracts by altering the pressure exerted against it by two plates and a threaded fastener.

摘要翻译： 包括空气通道进入系统的“空气冷却”型的地球钻头，其包括大致垂直的通道，其在腿的外部上具有开口，或者在形成钻头主体的一部分的柄腔中。 通过改变通过两个板和螺纹紧固件对其施加的压力来延伸或缩回的芯部，该垂直通道可通过开口接近。

公开(公告)号：US4516156A

公开(公告)日：1985-05-07

申请号：US358548

申请日：1982-03-15

申请人： Alfonso V. Fabris ,  Robert M. Strickland, Jr. ,  John T. Toth

发明人： Alfonso V. Fabris ,  Robert M. Strickland, Jr. ,  John T. Toth

IPC分类号： G06F3/033 ,  H04M3/56 ,  H04N7/15 ,  H04N7/14

CPC分类号： H04M3/567 ,  G06F3/033 ,  H04M3/561 ,  H04N7/15

摘要： Control of teleconference is facilitated so as to allow relatively unskilled operators to implement such control. The invention includes at least a pair of teleconferencing sites, each of which includes at least a pair of controllable video sources for deriving video signals from controllable regions of the associated site, an audio source for deriving an audio signal from the associated site, at least a pair of video displays for controllably displaying either locally or remotely generated images, an audio transducer responsive to a remotely generated audio signal for generating perceptible sound, an interface for coupling digital representations of locally generated audio and video signals to a communication link linking the sites and for coupling digital representations of remotely generated audio and video signals, a control device including a digital microprocessor and controlling, among other things, a video matrix switch, the video matrix switch having plural video inputs and outputs for controllably coupling at least a locally generated video signal to the interface and for controllably coupling locally and/or remotely generated video to said displays. The control device also includes a control video display with a touch sensitive screen for controlling the video sources and video matrix switch in response to touches on the touch sensitive screen by an operator and further including, in the form of a program in said microprocessor, apparatus to interpret commands initiated by operator touches of the touch sensitive screen and for thereafter implementing the commands if elements of the command are consistent with each other and with available resources as well as message formatting which are responsive to the logic for formatting digital messages destined for the video sources and the video matrix switch.

摘要翻译： 促进电话会议的控制，以便允许相对不熟练的操作员实现这种控制。 本发明包括至少一对电话会议站点，每个电话会议站点至少包括一对用于从相关站点的可控区域导出视频信号的可控视频源，用于从相关站点导出音频信号的音频源，至少 用于可控地显示本地或远程产生的图像的一对视频显示器，响应于远程产生的音频信号以产生可感知声音的音频换能器，用于将本地产生的音频和视频信号的数字表示耦合到链接站点的通信链路的接口 并且用于耦合远程产生的音频和视频信号的数字表示，包括数字微处理器并且控制视频矩阵开关的控制装置，所述视频矩阵开关具有多个视频输入和输出，用于可控地耦合至少局部产生的 视频信号到界面和可控制的 将本地和/或远程生成的视频播放到所述显示器。 控制装置还包括具有触敏屏幕的控制视频显示器，用于响应于操作者对触敏屏幕的触摸而控制视频源和视频矩阵开关，并且还包括在所述微处理器中的程序形式的装置 以解释由触摸屏幕的操作者触摸发起的命令，并且此后如果命令的元素彼此一致并且具有可用资源以及响应于用于格式化用于格式化的数字消息的逻辑的消息格式，则实现命令 视频源和视频矩阵开关。