The spring toy Slinky is a kind of spiral spring toy. If placed on the stairs, it will stretch and recover along the stairs under the combined action of gravity and inertia, showing an interesting state of "climbing down the stairs". The inventor was richard james, a naval engineer.
1943 One day, Clay Watson, an American naval engineer, and his colleague richard james did an experiment in a shipyard in Philadelphia to study the anti-seismic effect of springs on precision instruments in strong waves. In the experiment, richard james accidentally knocked off a spring on the shelf and watched it arc off the shelf step by step. ?
I found that a landed spring actually started to "walk". So he showed the spring to his wife Betty and asked her if she could dig something out of it. He said that as long as there is the right steel and the right spring tension, a spring that can "walk" can be made.
The two immediately thought that they could use it to make toys. Betty had some doubts about the feasibility of the toy at first, but when the sample made a group of children in the neighborhood laugh, she dispelled her doubts and rummaged through the dictionary to find a suitable name for the toy.
Then she found a word "Slinky", which means "sneaky, smooth and crooked" in Swedish. In this way, Slinky, the king of toys, was born.