专利汇可以提供Railroad lift bridge remote control system专利检索,专利查询,专利分析的服务。并且Apparatus at the lift bridge receives whistle signals from approaching ships and records requests for raising the bridge span to allow ship passage. A horn transmitter on the bridge automatically responds to ship requests to indicate whether or not span will raise, as determined by the response of the control system operator. In response to a received ship request indication, the remote control operator, if conditions allow, initiates a command function to raise the bridge span. Safety logic sequencing circuitry checks the condition of the railroad traffic control system and transmits the bridge raise command only if no rail traffic route across the bridge is established or occupied by a train and if safety devices, e.g., derails, are in their blocking positions. The bridge lift apparatus properly sequences the actions necessary to raise and lower the bridge, including rail unlock and locking and starting and stopping the span, when the corresponding command function is received. Remote operator selection of a rail traffic route across the bridge initiates the safety logic circuitry sequence to lower the bridge, if up, and to then establish derail and signal conditions for train movement. Under-bridge ship detectors prevent lowering the span upon a ship occupying that space. When span-seated and rails-locked indications are received and checked, the safety logic circuitry closes the derails and subsequently clears the proper signal for the desired train movement.,下面是Railroad lift bridge remote control system专利的具体信息内容。
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