公开(公告)号：US06302785B1

公开(公告)日：2001-10-16

申请号：US09592361

申请日：2000-06-12

申请人： Richard McKinney ,  J. Charles Headrick

发明人： Richard McKinney ,  J. Charles Headrick

IPC分类号： F24F1312

CPC分类号： E04B1/7076 ,  F24F13/082 ,  F24F13/12

摘要： An improved foundation vent with increased net free area is provided. The foundation vent has a frame that surrounds and defines an opening and a grill supported by the frame and spanning the opening. The grill has an inside face disposed on the inside of a crawlspace when the vent is mounted in a foundation wall and an outside face disposed on the outside of the crawlspace. A mesh screen is mounted to the frame and spans the opening adjacent the inside face of the grill. The grill is provided with projecting standoffs that support the screen at a predetermined distance from the inside face of the grill to form a plenum between the screen and the grill. A raised peripheral rim is provided on the frame and supports the peripheral portion of the screen. The spacing of the screen from the inside face of the grill and the plenum formed thereby unblocks the portions of the screen that otherwise would be blocked by the members of the grill and thus increases the net free area of the foundation vent.

摘要翻译： 提供了一个改进的基础通风口，增加了净空闲面积。 基础通风口具有围绕并限定开口的框架和由框架支撑并横跨开口的格栅。 当排气口安装在基础壁和设置在爬行空间外侧的外表面时，格栅具有设置在爬行空间内侧的内表面。 筛网安装在框架上，并跨过与烤架内表面相邻的开口。 格栅设置有突出的支座，其支撑屏幕距离格栅的内表面预定的距离，以在屏幕和格栅之间形成增压室。 凸起的外围边缘设置在框架上并支撑屏幕的周边部分。 屏幕与格栅内表面的间隔和由此形成的增压室可以阻挡屏幕的部分，否则会被格栅的部件阻挡，从而增加了基础通风孔的净空区域。

公开(公告)号：US06859430B1

公开(公告)日：2005-02-22

申请号：US09410402

申请日：1999-10-01

申请人： George N. Frank ,  Dan Zheng ,  Michael A. D'Jamoos ,  Gregory D. Lowe ,  Richard McKinney

发明人： George N. Frank ,  Dan Zheng ,  Michael A. D'Jamoos ,  Gregory D. Lowe ,  Richard McKinney

IPC分类号： H04L12/70 ,  H04Q11/04 ,  H04L1/00

CPC分类号： H04Q11/0478 ,  H04L2012/5612 ,  H04L2012/5627

摘要： A system and method for protection of virtual connections at the data link layer. The method provides for protection switching in a ring network. The method comprises detecting an error in one of a first and second routes (“the errored route”). Error cells are generated for each virtual connection affected by the detected error. Error cells are transmitted downstream on the errored route. First switch fabric receives the error cells at a downstream network element associated with the errored route. Change in state of the errored route is communicated to a second switch fabric of the downstream network element associated with the other of the first and second routes (the “other route”). When the state of the errored route is worse than the state of the other route, automatically configuring the second switch fabric to establish the other route to be a working route for the virtual connection.

摘要翻译： 用于保护数据链路层虚拟连接的系统和方法。 该方法提供环网中的保护倒换。 该方法包括检测第一和第二路由（“错误路由”）之一中的错误。 为检测到的错误影响的每个虚拟连接生成错误单元。 错误单元在错误路由下传输。 第一交换结构在与错误路由相关联的下游网元处接收错误信元。 错误路由的状态的改变被传送到与第一和第二路由中的另一个（“其他路由”）相关联的下游网元的第二交换结构。 当错误路由状态比其他路由状态更差时，自动配置第二交换机结构，建立另一条路由，作为虚拟连接的工作路由。