THE TABLET SYSTEM
from album 'Post offices, Hyde - Kaimataitai', George Griffiths Papers, MS-3888/027
Hocken Collections - Uare Taoka o Hākena, University of Otago
On the 10th September 1871, two trains came to a head-on collision between Norwich railway station and Brundall in the English county of Norfolk. Twenty three people, including the driver died from the incident and 73 people were injured.
From this incident, the engineer Edward Tyer invented a way to prevent these accidents. It was called "Tyer's Electric Train Tablet" and was taken up by New Zealand Rail in the early 1900's after a serious collision at Rakaia in 1899.
This is how Tyer's Train Tablet worked...