07-13-2016, 03:22 PM

Keith Seymore Keith Seymore is offline

Ultimate Warrior

Join Date: Nov 2007

Location: Motor City

Posts: 8,509

Quote:

Originally Posted by MikeNoun

Internals of the 1967-1969 cocktail shaker. Weight is 22.5 pounds each, so that's an extra 45 lbs in back, 45 lbs. in front. The center piece is cast iron and very heavy.

Thank you; it looks like a simple spring/mass system, probably tuned to a specific natural frequency with the spring force supplemented by the internal fluid.

K

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