Search out discoveries in science and their applications in daily life only between 1920-1925
The Electric Automatic Traffic Signal
Garret Morgan is credited with inventing the first electric automatic traffic signal in 1923. Although other types of traffic signals were in use since 1868, Morgan’s design used a T-shaped pole and had three positions. The patented design was sold to General Electric for $40,000.
According to the United States Access Board, the United States had roughly 300,000 traffic lights in 2018. Just imagine how many are in use across the whole world!
2. Quick-Frozen Food
Can you imagine not having a pack of frozen peas in the freezer just when you need it? Or how about a frozen pizza for when a craving hits? Well, frozen veggies and food as we know them today haven’t always been a staple in every home! Clarence Birdseye invented and offered Americans the first quick-frozen foods in the 1920s after noticing how good a fish kept if it was frozen quickly rather than slowly