1 янв 1868 г. - Traffic Light
Описание:
THE FIRST traffic signal was invented by J P Knight, a railway signalling engineer. It was installed outside the Houses of Parliament in 1868 and looked like any railway signal of the time, with waving semaphore arms and red-green lamps, operated by gas, for night use. Unfortunately it exploded, killing a policeman.
Добавлено на ленту времени:
Industrialization
Дата:
