This is an excellent opportunity for you to tell us why rseeek.org and Google search results did not address your needs, which may either answer your question without our help or help us to understand your needs better.
I will also comment that a "spring" is usually more complex than just a "helix", since the pitch gets smaller near the ends, so adding this word may be hindering your chance if getting responses rather than helping.
And learn to post using plain text format. The more complex your question gets, the more important this nitpicky detail becomes.
Sent from my phone. Please excuse my brevity.