公开(公告)号：US4871628A

公开(公告)日：1989-10-03

申请号：US257838

申请日：1988-10-14

申请人： David H. Parker

发明人： David H. Parker

IPC分类号： F21L4/00 ,  F21V15/04 ,  H01M2/10 ,  H01M2/20 ,  H01M2/30 ,  H01M6/44

CPC分类号： F21L4/005 ,  F21V15/04 ,  H01M2/1055 ,  H01M2/204 ,  H01M2/30 ,  H01M6/44

摘要： A resilient disc to be located between batteries which are mounted within a battery operated device. If the batteries incur an unusual shock, such as when the device is dropped or thrown, this resilient disc functions to absorb enough of the shock to protect the battery terminal post from being damaged and hence make the batteries inoperative.

摘要翻译： 位于电池之间的弹性盘，其安装在电池供电装置内。 如果电池发生异常的冲击，例如当设备掉落或投掷时，该弹性盘可以吸收足够的冲击力，以保护电池端子柱免受损坏，从而使电池不工作。

公开(公告)号：US11063673B2

公开(公告)日：2021-07-13

申请号：US15990822

申请日：2018-05-29

申请人： David H. Parker

发明人： David H. Parker

IPC分类号： G06Q10/10 ,  G06Q40/08 ,  G06Q10/08 ,  G06Q30/02 ,  H04B11/00 ,  G06Q50/26 ,  G06Q30/00

摘要： Apparatus and methods to implement post accident communications in a coal mine, in compliance with the MINER Act and MSHA regulations, are disclosed. Acoustic waves are transmitted bidirectionally through-the-earth in a simple robust half-duplex architecture in combination with signal-to-noise reduction techniques which ensure the ability to communicate using simple tools available in a mine. A personal electronics device, designed to be carried by each miner, automatically decodes acoustically transmitted text messages sent by rescue operations, and automatically encodes text messages by a miner to synchronized impulses manually produced by the miner. Signals are synchronized, in time of day protocol, between the miner and rescue operations. Digital signal processing techniques are disclosed.

公开(公告)号：US20180278342A1

公开(公告)日：2018-09-27

申请号：US15990822

申请日：2018-05-29

申请人： David H. Parker

发明人： David H. Parker

IPC分类号： H04B11/00 ,  G06Q30/00 ,  G06Q50/26

CPC分类号： H04B11/00 ,  G06Q30/018 ,  G06Q50/265

摘要： Apparatus and methods to implement post accident communications in a coal mine, in compliance with the MINER Act and MSHA regulations, are disclosed. Acoustic waves are transmitted bidirectionally through-the-earth in a simple robust half-duplex architecture in combination with signal-to-noise reduction techniques which ensure the ability to communicate using simple tools available in a mine. A personal electronics device, designed to be carried by each miner, automatically decodes acoustically transmitted text messages sent by rescue operations, and automatically encodes text messages by a miner to synchronized impulses manually produced by the miner. Signals are synchronized, in time of day protocol, between the miner and rescue operations. Digital signal processing techniques are disclosed.

公开(公告)号：US20110251968A1

公开(公告)日：2011-10-13

申请号：US13166759

申请日：2011-06-22

申请人： David H. Parker

发明人： David H. Parker

IPC分类号： G06Q99/00 ,  H04B1/02

CPC分类号： H04B11/00 ,  G06Q30/018 ,  G06Q50/265

摘要： Acoustic waves are transmitted bidirectionally through-the-earth in a simple robust architecture in combination with signal-to-roise reduction techniques which ensure the ability to communicate using simple tools available in a mine. An enhanced version includes a personal electronics device designed to be carried by a miner to automatically decode acoustically transmitted text messages.

摘要翻译： 声波通过简单的鲁棒架构双向传输，结合信号到陀螺减少技术，确保使用矿井中可用的简单工具进行通信。 增强版本包括设计为由矿工携带以自动解码声学传输的文本消息的个人电子设备。

公开(公告)号：US07856334B2

公开(公告)日：2010-12-21

申请号：US12329575

申请日：2008-12-06

申请人： David H. Parker

发明人： David H. Parker

IPC分类号： G01P21/00

CPC分类号： G01S7/497

摘要： A method is disclosed whereby a laser-based spherical coordinate measurement system is dynamically calibrated. A mechanical oscillator, such as, but not limited to, a Foucault pendulum is used to generate periodic motions which can be fitted to Fourier series models. The residuals between the experimental measurements and the model can provide information which can be used to calibrate the instrument. The calibration information is used to augment the ASME B89.4.19-2006 standard to improve sensitivity to cyclic errors and include the servo systems.

摘要翻译： 公开了一种基于激光的球面坐标测量系统被动态校准的方法。 使用机械振荡器，例如但不限于福柯摆，以产生可以适用于傅立叶级数模型的周期运动。 实验测量和模型之间的残差可以提供可用于校准仪器的信息。 校准信息用于增加ASME B89.4.19-2006标准，以提高对循环误差的敏感性，包括伺服系统。

公开(公告)号：US20100290025A1

公开(公告)日：2010-11-18

申请号：US12838452

申请日：2010-07-18

申请人： David H. Parker

发明人： David H. Parker

IPC分类号： G01C3/00 ,  G02F1/01 ,  G02B3/00

CPC分类号： G02F1/01 ,  G01S7/497 ,  G01S17/006 ,  G02B13/146 ,  G02B26/06 ,  G02B27/0025 ,  G02B27/46

摘要： The invention extends classical time-invariant optical design to include optical amplitude modulated light, using tools from communications theory. Effects of dispersion are derived from first principles.

摘要翻译： 本发明通过使用通信理论的工具将经典的时不变光学设计扩展到光调制光。 色散的影响源于第一原则。

公开(公告)号：USD485069S1

公开(公告)日：2004-01-13

申请号：US29157840

申请日：2002-03-26

申请人： David H. Parker

设计人： David H. Parker

公开(公告)号：USD465330S1

公开(公告)日：2002-11-12

申请号：US29151644

申请日：2001-12-07

申请人： David H. Parker

设计人： David H. Parker

公开(公告)号：USD446184S1

公开(公告)日：2001-08-07

申请号：US29125443

申请日：2000-06-23

申请人： David H. Parker

设计人： David H. Parker

公开(公告)号：USD445925S1

公开(公告)日：2001-07-31

申请号：US29125442

申请日：2000-06-23

申请人： David H. Parker

设计人： David H. Parker