On Thu, 28 Jul 2005 11:22:24 -0700, the renowned Tim Wescott
wrote:

So what do you call a spiralled torsion spring like clock mainspring? A
spiralled spring? Is there a more common, clearer name?

An old text I have "Mechanical Design of Machines" (Siegel, Maleev,
Hartman) calls them "spiral springs". They are a special case of the
helical spring with the angle of the helix zero.


Best regards,
Spehro Pefhany
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