Answer» Correct Answer - Option 4 : Safety pin
The correct answer is Safety pin. - The safety pin was invented by Walter Hunt.
- American mechanic Walter Hunt is regarded as the inventor of the safety pin.
- The safety pin included a clasp that covered the point and kept it from opening and a circular twist at the bend to act as a spring and hold it in place.
- The safety pin was invented while Hunt was twisting a piece of wire and trying to think of something that would help him pay off a debt of fifteen dollars.
- It was the first pin to have a clasp and spring action and Hunt claimed
- it was designed to keep fingers safe from injury, hence the name.
- Scooter :
- The concept of the scooter stretches back at least a century before to 1817 and Baron Karl von Drais de Sauerbrun of Germany.
- Safety Lamp :
- The Davy lamp is a safety lamp for use in flammable atmospheres, invented in 1815 by Sir Humphry Davy.
- It consists of a wick lamp with the flame enclosed inside a mesh screen.
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