1) Grenade launcher 
The Arbalète sauterelle type A, or simply Sauterelle (French for grasshopper), was a bomb-throwing crossbow used by French and British forces on the Western Front during World War I. It was designed to throw a hand grenade in a high trajectory into enemy trenches. It was initially dismissed by the French Army but General Henri Berthelot thought i...
mason's tool for making angles
• (n.) An instrument used by masons and others to trace and form angles.
Sau`te·relle noun [ French] An instrument used by masons and others to trace and form angles.