Direction sensing apparatus for data transmission cable connections
Patent 4898565 Issued on February 6, 1990. Estimated Expiration Date: 
February 6, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
February 6, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesOptical transmission of digital seismic data Patent #: 4408307 InventorAssigneeApplicationNo. 668679 filed on 11/05/1984US Classes:398/28Fiber characteristicExaminersPrimary: Safourek, Benedict V.Assistant: Van Beek, L. Attorney, Agent or FirmInternational ClassH04B 009/00AbstractDisclosed is a direction sensing apparatus employed with universal connectors at the data units located along a data transmission cable. Each connector includes an optical source and an optical detector and the connecting segments cable between units each includes two fiberoptic conduits. One is for the transmission of control signals in a direction away from a master station and the other is for the transmission of the data signals toward the master station. Logic circuitry within each unit determines the presence of the first light source detected at the unit and switches the signals modulated thereon to the command channel within the unit. This switching also applies the signals modulated on the second-in-time light source detected at the unit to be applied to the data channel within the unit. Hence, it makes no difference which of the two connections at each data unit is used for connecting with the preceding station or with the succeeding station. | |
