200-мм светодиодный светофор | Разработка светодиодных светофоров
200-миллиметровый светодиодный светофор | LED traffic light development
In the early 19th century, in York City in central England, red and green clothes represented different identities of women. Among them, the woman in red means that I am married, while the woman in green is unmarried. Later, horse-drawn carriages often ran over people in front of the House of Parliament in London, so people were inspired by red and green clothes. On December 10, 1868, the first member of the signal family was born on the square of the House of Parliament in London.
The lamp post, designed and manufactured by British mechanic DeHart at that time, was 7 meters high, and hung a red and green lantern - gas traffic signal, which was the first signal lamp on the city street. At the foot of the lamp, a policeman with a long pole pulled the belt to change the color of the lantern at will.
Later, a gas lampshade was installed in the center of the signal light, and two pieces of red and green glass were alternately shaded in front of it. Unfortunately, the gas lamp, which has only been available for 23 days, suddenly exploded and extinguished itself, killing a policeman who was on duty.
Since then, the city's traffic lights have been banned. It was not until 1914 that the city of Cleveland in the United States took the lead in restoring traffic lights, but at this time it was already an "electrical signal light". Later, in cities such as New York and Chicago, traffic lights reappeared one after another.
In the early 19th century, in York City in central England, red and green clothes represented different identities of women. Among them, the woman in red means that I am married, while the woman in green is unmarried. Later, horse-drawn carriages often ran over people in front of the House of Parliament in London, so people were inspired by red and green clothes. On December 10, 1868, the first member of the signal family was born on the square of the House of Parliament in London.
The lamp post, designed and manufactured by British mechanic DeHart at that time, was 7 meters high, and hung a red and green lantern - gas traffic signal, which was the first signal lamp on the city street. At the foot of the lamp, a policeman with a long pole pulled the belt to change the color of the lantern at will.
Later, a gas lampshade was installed in the center of the signal light, and two pieces of red and green glass were alternately shaded in front of it. Unfortunately, the gas lamp, which has only been available for 23 days, suddenly exploded and extinguished itself, killing a policeman who was on duty.
Since then, the city's traffic lights have been banned. It was not until 1914 that the city of Cleveland in the United States took the lead in restoring traffic lights, but at this time it was already an "electrical signal light". Later, in cities such as New York and Chicago, traffic lights reappeared one after another.
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