Black Tech game changers- Garrett A Morgan

After witnessing an accident between a horse-drawn carriage and an automobile, Morgan had an idea. His three-position traffic signal, patented in 1923, helped save lives at a time when cars, horses and pedestrians all shared the road. But this wasn't even his most famous invention. Morgan received a patent in 1912 for his safety hood and smoke protector (a precursor to today's gas mask), which helped save a group of men trapped in a tunnel beneath Lake Erie in 1916.