System to control and temporarily adapt semaphoric regulation, consisting of one first receiving radioelectric equipment (F), equipped with nondirectional aerial, and provided, on roads, buildings, etc., in number suitable for requirements of monitored crossings, to receive and decode signals on a given...http://www.google.es/patents/US4896153?utm_source=gb-gplus-sharePatente US4896153 - System to control and temporarily adapt semaphoric regulation
System to control and temporarily adapt semaphoric regulation
