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    • 22. 发明授权
    • Method and apparatus for generating replies to address resolution protocol requests
    • 用于产生对地址解析协议请求的回复的方法和装置
    • US06775278B1
    • 2004-08-10
    • US09549947
    • 2000-04-14
    • Edward Glen BrittonJeffrey Douglas HaggarThomas Donald MooreAndrew Henry RichterBarton Clark Vashaw
    • Edward Glen BrittonJeffrey Douglas HaggarThomas Donald MooreAndrew Henry RichterBarton Clark Vashaw
    • H04L1228
    • H04L29/12018H04L29/12009H04L61/10H04L69/40
    • The invention ensures that a single and consistent reply is made to ARP request in a system of connected IP networks. When an adapter (A) becomes active, the owning host sends an ARP advertisement into the network over the adapter. If the advertisement is also received at the sending host over a different adapter B, then the host knows that adapter B is on in the same physical network as adapter A and B can be designated as a backup adapter for A and A can be designated as backup adapter for B. If adapter A fails or becomes inactive, the host resets the backup adapter field for any adapter it owns for which A is marked as the backup adapter. If a backup adapter B has been designated for A, the host also sends an ARP advertisement associating MAC-B with IP-A. This allows network connections originally served via adapter A to continue non-disruptively over adapter B and it also provides access to the host for subsequent new connections. When adapter A becomes active again, the host sends a gratuitous ARP advertisement that maps IP-A to MAC-A. This allows adapter A to re-assume responsibility for responding to ARP requests for IP-A.
    • 本发明确保在连接的IP网络的系统中对ARP请求进行单一一致的回复。 当适配器(A)变为活动状态时,拥有主机通过适配器向网络发送ARP广告。 如果通过不同的适配器B在发送主机处接收到广告,则主机知道适配器B在与适配器A相同的物理网络中处于开启状态,并且B可以被指定为用于A的备用适配器,并且A可以被指定为 备用适配器B.如果适配器A出现故障或变为不活动状态,则主机会为其所有A适配器的适配器重新设置备份适配器字段。 如果A指定备用适配器B,主机还会发送一个关联MAC-B与IP-A的ARP通告。 这允许最初通过适配器A服务的网络连接在适配器B上不间断地继续,并且还提供对主机的访问以用于后续的新连接。 当适配器A再次变为活动状态时,主机发送一个将IP-A映射到MAC-A的免费ARP广播。 这允许适配器A重新承担响应IP-A的ARP请求的责任。
    • 24. 发明授权
    • Carrier for interchangeable camera lenses
    • 可互换摄像机镜头的承载
    • US3828991A
    • 1974-08-13
    • US33092773
    • 1973-02-09
    • MAC DONALD MOORE
    • MAC DONALD MOORE
    • A45C11/38A45F3/00A45F5/00
    • A45C11/38A45F5/00A45F2003/002A45F2005/006Y10S206/821Y10S224/908
    • The carrier is for use with lenses, for still cameras, of the type having mounting ends releasably securable in a lens mount on the camera. The carrier is an annular member formed with a pair of coaxial and axially spaced threaded recesses extending in opposite directions from a central diametric plane, and respective lens mounts are threadedly engaged in each recess for securement of a respective interchangeable camera lens therein. The lens mount may be threaded for threaded engagement with a lens or may have a bayonet-type joint for engagement with a corresponding bayonet-type joint on the lens. The annular member has an imperforate diaphragm or partition extending thereacross at its central plane providing dust-proof mounting for the lens mounts. A pair of apertured lugs are threaded into the annular member at diametrically opposite points to receive snap hooks on the ends of a neck strap for supporting the carrier.
    • 该载体用于具有可拆卸地固定在相机上的镜头安装件中的安装端的类型的用于静止相机的透镜。 载体是形成有一对同轴且轴向间隔开的螺纹凹部的环形构件,其从中心直径平面沿相反方向延伸,并且各个透镜安装件螺纹地接合在每个凹部中,以将相应的可互换的相机透镜固定在其中。 透镜支架可以是螺纹的,用于与透镜螺纹接合,或者可以具有卡口式接头,用于与透镜上的相应卡口式接头接合。 环形构件具有在其中心平面上延伸的无孔隔膜或隔板,为透镜座提供防尘安装。 一对有孔的凸耳在径向相对的点处被拧入环形构件中,以在颈带的端部上接收用于支撑载体的卡扣钩。