The light bulb below was created mainly using elementary functions. The curves in the 2D view are functions except for the three vertical line segments. All the components of the light bulb (except the filament) were created in the 2D view and then rotated about the x-axis in the 3D view. The filament was created in the 3D view using a helix.

Inspired by this [url=https://i1.wp.com/edisonlightglobes.com/120V/wp-content/uploads/2013/06/80mm-spiral-round.jpg?fit=800%2C800&ssl=1]l[/url][url=https://i1.wp.com/edisonlightglobes.com/120V/wp-content/uploads/2013/06/80mm-spiral-round.jpg?fit=800%2C800&ssl=1]ight bulb[/url].