Train vehicle speed control signal providing apparatus

Details Train vehicle speed control signal providing apparatus Train vehicle speed control signal providing apparatus

1975-07-07

1977-01-11

Kunin, Stephen G.

Railway switches and signals

Block-signal systems

Automatic

104152, 104153, 246182R, 331 56, 340171R, B61L 320

Patent

active

040023141

ABSTRACT:
The present invention relates to a train vehicle speed control signal providing apparatus operative with a frequency command speed control signal, and relates to the generation of the desired speed code signals in such a frequency rate system. Two separate and independent physical and electrical operations provide each of the respective desired frequency speed code signals in combination with a comparison step to provide an output speed code signal only if the two input frequency signals are each at the desired frequency.

REFERENCES:
patent: 3518567 (1970-06-01), Helgesson
patent: 3593022 (1971-07-01), Hoyler et al.
patent: 3748466 (1973-07-01), Sibley et al.

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