Opis naprav
Signalnovarnostne naprave zagotavljajo varno in zanesljivo urejanje železniškega prometa. Na odprti progi omogočajo večje hitrosti in tesnejše zaporedje vlakov, na postajah pa zavarujejo vozne poti s pravilno lego kretnic in signalov, dokler poteka vožnja vlaka.
Bistveni del starejših signalnovarnostnih naprav je postavljalo, ki ima v spodnjem delu vzvode, s katerimi kretnik na daljavo spreminja lego kretnic in likovnih (mehanskih) signalov. V zgornjem delu so električna bločna polja za povezavo z nadrejenim bločnim aparatom v prometni pisarni.
Novejše naprave imajo le še postavljalno mizo v prometnem uradu, od koder prometnik krmili kretnice z elektromotorji, signali pa so svetlobni.
Signalling and safety apparatus
Signalling apparatus allows rail travel to be speedy and safe. It protects trains when they are stationary and in motion, ensuring that points and signals are correctly set for their passage.
The control part of traditional equipment has two essential components: at its base is the lever frame for points and signals, and above it are electric block repeaters for communication with the stationmaster’s office.
Modern systems are confined to a control panel in the stationmaster’s office, operating points and light signals electrically by remote control.