Yes, it was during World War 2 as a weapon but the creator failed ,and that is also how the slinky was born
Robert Hooke invented the spring balance.
The back hand spring was usually invented in the 1960's if u ask me
the spring as first used in the late 1400's.
Spring wasn't invented, it's just there. They have a different name for it in every country. You're talking about the season, right?
Richard Salter invented the spring balance in 1760.
The spring ring was first patented in 1900.
The spring scale was invented because the inventor Richard Salter wanted a better way to measure objects in gram's.
Breakaway rims were invented in the mid-1970s
Greece
Edward Lewis
so that beds would be comfortable
John r. Bragg