It's said that America receives tens of thousands of inventions every year. Of these only a few become (受欢迎的)and make a lot of money. There are thousands of inventions that (没有人) wants. Here are some of these.
In 1879, somebody invented a new type of "fire escape ". This was a hat which had a parachute(降落伞) on top. You (连接) the hat with a strap under your chin. With this special hat on you could jump from a building on (火) and fly down safely. With it there was also a special (双) of shoes, so the person could land safely.
There was a special alarm clock for people who had (问题) waking up in the morning. This clock had six pieces of wood that hung above your head. At the right time the pieces of wood (掉落) on you when you were sleeping. They hit you but did not (伤害) you, Therefore, you woke up.
Another invention was the bicycle seat to stop a thief. This seat had needles in it. When the (拥有者) rode the bicycle the needles were down. But when the bicycle was not in use, the needles were up. So a thief who jumped on the bike got a big (惊喜).
