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    • 6. 发明专利
    • Improvements in Railways Signalling Apparatus.
    • GB191113354A
    • 1912-02-22
    • GB191113354D
    • 1911-06-03
    • BURNS DAVID
    • BURNS DAVID
    • B61L23/12
    • 13,354. Burns, D. June 3. Hand-levers, interlocking; signalling between trains and cabins; track apparatus actuating signals other than on trains.-Apparatus for notifying a signalman that a train is waiting at a signal comprises visual and audible warnings, and is operated by the fireman closing an electric switch near the signal. By closing a switch G, the fireman of a train stopped at a signal D operates a visual indicator H in the signal-box, and should the signalman draw off any of the signals C, E, F in the rear while the switch is closed, the lever contacts c, e, f will complete the circuit of a bell M, thus reminding him that the line is not clear. On getting the signal D, the fireman opens the switch G. The Provisional Specification also describes a modified form of apparatus in which a switch operated by the waiting train or by the fireman rings a bell in the signal-box, the bell being subsequently stopped by the signalman pulling a lever, which actuates a visual indicator and locks the levers of the signals in the rear.