This week's Friday Brain-teaser from xrefer tests your knowledge of inventions. Answers here

1. What kind of aircraft engine was invented by the English engineer Sir Frank Whittle?
2. Which US inventor is credited with inventing the phonograph and the electric light bulb?
3. Which road safety device was invented by Percy Shaw in 1934?
4. Which 18th-century American statesman invented the lightning conductor or lightning rod?
5. German engineer Gottlieb Daimler (1834-1900) collaborated with Nikolaus Otto in 1876 in inventing the first...what?
6. English engineer Charles Babbage (1792-1871) devised the "difference engine" which is the forerunner of which modern invention?
7. US inventor Elisha Otis in 1852 designed which safety device?
8. What type of staircase was introduced in the USA and patented by Jesse W. Reno in 1892?
9. Which American inventor founded the frozen food industry?
10. What nationality was Adolphe Sax, who invented the saxophone?