Spiral curve from closed curves

[RANE]

Hello, I have these curves set of curves. Which I want to transform into one Spiral / Helix curve.
Does anyone have ideas on how I can get this done?

Thank you
RANE
Spiral from Closed curves.gh (57.5 KB)

[magicteddy]

Tadaaa

Spiral from Closed curves.gh (68.0 KB)

[RANE]

Thank you @magicteddy it worked.

[laurent_delrieu]

You could also use loft and surface.

Spiral from Closed curves.gh (69.2 KB)