Electrical news and engineering . circuited, the relays R, keep the transformersconnected with the feed wires, stepping the no volts upto about 22,000 volts, vifhich causes an oscillatory dischargeto continuously take place between the oscillators, PP. Con-nected to the oscillators are the insulated wave wire, W,and the pick-up wire, U, extending along the track in therelative positions shown. The wires W and U are chargedwith the wa\e producing current only when the block in every three seconds when the wave is being received. Con-nected to the master-relay is a series of ten hold r
Electrical news and engineering . circuited, the relays R, keep the transformersconnected with the feed wires, stepping the no volts upto about 22,000 volts, vifhich causes an oscillatory dischargeto continuously take place between the oscillators, PP. Con-nected to the oscillators are the insulated wave wire, W,and the pick-up wire, U, extending along the track in therelative positions shown. The wires W and U are chargedwith the wa\e producing current only when the block in every three seconds when the wave is being received. Con-nected to the master-relay is a series of ten hold relays, 3to 12 inclusive. These relays will hold their magnetismone second each after the current is broken, and so, all beingin parallel number 12 releases its contact just 10 secondsafter the master relay ceases to be operated by the wavecontrolling influence. Relay No. 7, when closed, operates solenoid 13, whoseplunger holds valve ig closed, which prevents the air fromihc main reservoir blowing whistle, 20. Relay n in the same. Fig 1—Diagraiuiuatic Drawing of three Oouseculive Blocks, Showing Apparatus and Connections. advance is clear, and send out waves continuously as inwireless telegraphy. All the track blocks are provided withthe ordinary form of vane type relays and track cir-cuits. The part of the system carried on the engine com-prises (l) the main antenna, consisting of an aluminumplate four inches wide, by 19 feet long, and hanging directlyover the wave wire. (2) A pick-up antenna suspended in a like manner onthe right hand side. (3) A small turbine generator. {4) The train control mechanism, chief of which is thecoherer, fig. 2, 22 and 23, consisting of a wood fibre recep-tacle having a hole in the centre, and two lugs inserted in its
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Keywords: ., bo, bookcentury1800, bookdecade1890, bookidelectricalnewsen20donm
