"LINEAR CLEAR" CHECKING DEVICE Russian patent published in 2006 - IPC B61L23/16 

FIELD: railway signaling and communication; traffic control devices.

SUBSTANCE: system of track devices includes track circuit with series-connected ac supply source and track transformer, current limiter, track relay and rail line, radio pulse receiver with receiving antenna, locomotive control relay, correspondence relay and arrival relay. System of locomotive devices includes locomotive receiver with receiving locomotive coil, axial track pickup, counter, pulse shaper, logic AND gate, trigger, fixed memory, comparator and radio pulse transmitter with transmitting antenna. Train arrival checking is based on the fact that radio pulse is transmitted from locomotive when check section is clear.

EFFECT: improved reliability of checking train passing along track section with its full complement.

2 dwg