Abstract: A system and method for synchronizing a plurality of networked fire alarm panels is disclosed. A plurality of fire panels (i.e., nodes) are arranged on a peer-to-peer network, such as a token ring network. One node is designated as a SyncHost, and the remaining nodes are periodically reset to the clock time associated with the SyncHost to ensure all nodes remain substantially synchronized to a single time. As such, when an alarm condition is signaled, the visual notification devices (i.e., strobe lights) of all the fire panels (nodes) will flash at substantially the same time, in accordance with government guidelines. To accomplish the synchronization, the SyncHost sends periodic attendance polls around the network, noting the transit times of the polls. The individual nodes on the network also note times associated with the polls.

Abstract: A system and method for synchronizing a plurality of networked fire alarm panels is disclosed. A plurality of fire panels (i.e., nodes) are arranged on a peer-to-peer network, such as a token ring network. One node is designated as a SyncHost, and the remaining nodes are periodically reset to the clock time associated with the SyncHost to ensure all nodes remain substantially synchronized to a single time. Upon alarm, the visual notification devices (i.e., strobe lights) of all the fire panels (nodes) will flash at substantially the same time. To accomplish the synchronization, the SyncHost sends periodic attendance polls around the network, noting the transit times of the polls. The nodes also note times associated with the polls. The SyncHost sends a sync message to the nodes, and each of the nodes resets its clock according to the sync message and internal compensations. Other embodiments are disclosed and claimed.

Abstract: A releasable quick-coupling fastener assembly includes a backing sheet (22) having a number of apertured ovaloid bosses (24, 76-90) each presenting a resilient inboard wall structure (108) and resilient inner connective walls (110 and 112) from which depend inwardly extending lip members (118 and 120). The assembly further includes a threaded member (20) having a head (26) and a helically flighted shank (38) for insertion within a boss aperture (106) through a straight application of force by which the shank thread structure (40-54) deformably engages the lip members (118 and 120). The threaded member (20) and be released from engagement with the boss (e.g., 24) through counterclockwise rotation.

Abstract: A connector for quickly and easily connecting the tubular frame parts of a chair, table or other structure made up of a number of tubular frame members which are in proximity to each other at various locations on the structure. The connector includes a pair of parallel bars interconnected by a central element, first ends of the bars being insertable in a first tubular member and secured by screws bearing against the inner surface of the first member. The second end of one of the bars extends into a second tubular member extending transversely of the first member, and a screw is used to couple the second member to the second end of the one bar. The second end of the second bar extends into a third tubular member axially of the same, and a screw is used to secure the third member to the second bar.