1, temporarily replacing the hook
Paper clips can be fixed on the wall or table to hang clothes, bags and other items.
2. Open the SIM card slot.
You can put a paper clip in the SIM card slot of your mobile phone and push it gently to open the SIM card slot.
3. Clean the telephone jack
You can gently insert the paper clip into the earphone jack or charging jack of the mobile phone to clean the dust inside.
Step 4 take out the battery
You can put a paper clip in the battery box and take out the battery with a gentle push.
5. Temporary needle and thread
One end of a paper clip can be bent into a hook for threading and simple sewing.
6. Rescue needle
You can use paper clips to take out thorns, needles and other items from clothes for simple first aid.
The inventor of paper clip and its history
I. Inventors
1899, invented by Norwegian Johan Vaaler, has been patented in Germany for clamping multiple pages together.
Second, history.
190 1, John E. Walker filed a patent application for wire paper clips (because there is no patent application system in Norway, Waller applied for a patent in Germany). Almost at the same time, several inventors also proposed similar designs. However, all these early paper clips have some problems.
When the clip is pushed, the protruding end of the metal wire will pierce the paper and cut it, causing even more damage to the paper than the needle. It is also difficult to make a machine for making clips. Obviously, the labor cost of producing paper clips by hand will make the product price too high.
William Middlebrook, an engineer in Fort Worth, Connecticut, solved the problem of machine building. He invented a machine for bending wire paper clips in 1899. Middlebrook may also provide solutions to other problems.
Because the paper clip made by his machine has double loops, which is very similar to the paper clip we use. These paper clips are famous "Gem" brand paper clips. They usually don't damage paper. Paper clips are made of plastic coated with different colors.
This not only makes paper clips more attractive, but also allows users to "code" pages with paper clips of different colors. It seems that no one mentioned the patent of "Gemstone" brand paper clip, so it is impossible to determine who is its inventor. But since it was adopted at the beginning of this century, it has become a standard design.