Ridiculous History Accidental Inventions of the 20th Century, Part Two: The Slinky and the Post-it Note
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May 15, 2025 Discover the quirky origins of the Slinky and Post-it Note, two iconic inventions born from happy accidents. Uncover how military coil research led to an invention that defines childhood play. Learn about the tenacity of a 3M employee who turned a weak adhesive into an office essential. With nostalgia and fascinating anecdotes, the hosts highlight the surprising impact of these creations on culture and daily life, all wrapped in humor and camaraderie.
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Richard James' Slinky Discovery
- Engineer Richard James accidentally discovered the walking spring while trying to create stable springs for naval ships.
- Instead of discarding it, he saw potential and pursued this quirky, springy invention that became the Slinky.
Launching the Slinky Toy
- Richard and his wife Betty took a $500 loan in 1944 to start James Industries and produced the Slinky.
- After a lively demo at a Philly department store, they sold all 400 units within two hours, proving the toy's appeal.
Silver's Weak Glue Breakthrough
- Spencer Silver invented a weak adhesive that was pressure-sensitive and left no residue.
- Despite its initial rejection, this weak glue paved the way for inventing Post-it Notes.