cocktail shaker....

here is one that looks like it:

http://www.patented-antiques.com/Backpages/Office/miscELEC.html

"Shak-Rite Electric Cocktail Shaker The metal shaker is marked with a 1919 patent. The tag on the front says Patents Pending. It gives a location of Rockford ILL. The serial # is 1698. A Google search using the name Shak-Rite seen on the front plaque came up empty. Further searches found an image of one on a poster for a cocktail shaker exhibition / collectors meeting. I found a picture of that one on display at that exhibition on its own pedestal under glass. It seems it is a pretty rare mixer from what I have learned in speaking with a few people.

The lever seen on the front, incorporated into the plaque, is the timer. You set that to the desired time and then push down the lever and it begins to rock back and forth mixing up your favorite cocktail. This feature is working. There is also a rheostat on the side, but that does not seem to be operable, and is a all or nothing affair. After pushing the main switch it does run, but at times needs to be coaxed along. I believe this is an adjustment in the transmission inside. The main crankshaft tends to hang up on the upper most part of the full revolution it must make. I adjusted that a couple times, but in order to do that you have to take the entire thing apart and play with the adjustments found on either end of the tranny. It needs to be played with a bit more. The overall condition is nice. The paint is about 90% and the chrome is pretty good and will polish out to be better."