Are you referring to a Rube Goldberg device? Rube Goldberg was an artist who illustrated incredibly detailed and comedic machine gadgets that were usually very complex. Hopefully this is who you are referring to.
rshard
Jim Dine draws tools
Some people who have drawn or sketched shells are:Anne Vallayer-CosterRichard MurdockThere are links to some of their works below.
KileBong
Andy Warhol is a famous artist. His name begins with A.
A famous artist? Any famous artist? Let's name just a few working in the US: David Hockney, Donald Judd, Sol Lewis, Chuck Close, Andy Warhol.
Picasso
Edgar Degas is a famous French artist. His name begins with the letter E.
Georges Seurat is a famous French artist.
Claude Monet.
LS Lowry.
David Hockney is a famous pop art artist. His first name is David.