Pictured is an antique McCaskey Register Co Receipt Holder. I have tried to find a modern equivalent, but I have not had much luck. I am considering building my own, is the spring used a readily available component? What should I be looking for?
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As a category, this would be called a torsion spring, but I don't know a name for one with that particular shape in the middle. – Ethan48 Mar 12 '16 at 15:41
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You might find something here: http://www.automotioncomponents.co.uk/en/catalog/mechanical/springs/torsion-springs/p1312 (or google for torsion spring images for more suppliers). – alephzero Mar 13 '16 at 04:15