Complex sentence: A 45 lever interlocking frame in a signal box was brought into use in 1890, by this time the station had a main platform with a dock platform at the eastern end, a main line and crossing loop, turntable, and a number of sidings.
Split into simpler sentences: A 45 lever interlocking frame, in a signal box, was brought into use in 1890. By this time, the station had a main platform, with a dock platform at the eastern end, a main line and crossing loop, turntable, and a number of sidings.