Complex sentence: Soon after starting the business in 1879, in 1880 Hans Renold invented the Bush Roller chain which represented a great advance on the common pin-and-link chains of the day and which laid the design foundation upon which all modern precision roller chains are based.
Split into simpler sentences: Soon after starting the business in 1879, in 1880 Hans Renold invented the Bush Roller chain. This represented a great advance on the common pin-and-link chains of the day and laid the design foundation upon which all modern precision roller chains are based.