Med Pocket Protector
Here’s a DIY version of the pocket protector – Popular Mechanics 1950 – and speaking of melting things…

Med Fire Tire
How To Build It 1932 shows how to use old tires as odorless fuel… Interesting what was acceptable over 70 years ago to burn in your homes. That said, around 10 million tires per year are consumed as fuel at dedicated tire-to-energy facilities – Link.

More at Modern Mechanix – Link.