Bildet : kjøretøy, interiørdesign, offentlig domene, lumixfz200, bridgecamera, trainsignals, spaker, signalbox 2400x1807

Si takk til PxHere

Skaperne våre elsker å høre fra deg og se hvordan du har brukt bildene deres. Vis din takknemlighet ved å donere, tweete, facebook og følge!

Bygg inn i artikkelen din (f.eks. Wordpress, Blogspot)

The first semaphore signals were controlled by levers situated at the signals. Some early signals protruded from the roof of the controlling signal box. Later, remote operation was effected by levers connected to the signal by single wires (UK), pairs of wires (Continental Europe), or pipes supported on rollers (US). The levers were grouped together in a building known as a "signal box" (UK & Australia) or "interlocking tower" (US). In the UK multiple signal wires were grouped together, and in station areas were commonly routed beneath platform faces just above rail level. The operation of a single signal wire would cause some of the adjacent wires to 'jangle', and this noise was one of the many characteristic sounds of railway travel until the gradual introduction of colour-light signals from the mid 20th century.

Den gratis høyoppløselig bilde av kjøretøy, interiørdesign, offentlig domene, lumixfz200, bridgecamera, trainsignals, spaker, signalbox

, tatt med en DMC-FZ200 01/01 2017 Bildet er tatt med 6.0mm, f/4.0s, 10/1250s, ISO 160

Bildet er sluppet fri av opphavsrettigheter under Creative Commons CC0.

Du kan laste ned, modifisere, distribuere og bruke dem avgiftsfri for noe du liker, selv i kommersielle programmer. Navngivelse er ikke nødvendig.