Here are two vintage jiggers as follows:
A vintage trip style jigger marked “Irvinware Inc. Patent No. 3527270, Made in West Germany 18/8 Stainless Steel”. It measures about 3 and 1/2 inches in diameter and 5 and 3/4 inches long.
This Patent No. 3527270 for “Liquid Measure With Tipping Cup”, dated September 8, 1970, was obtained by Karl-Heinz Weil. The intent is that pouring liquid into the jigger would trip the mechanism so that it would tip over and pour the liquid into the cup below. There is no indication of how much liquid would trigger the cup to tip and there are no measuring marks on the cup. I tried pouring in one ounce and it tipped before I was finished pouring. Perhaps half an ounce? I really don’t think this jigger is an accurate measure but more of a novelty.
The second is an Alfred E. Knobler tipping jigger measuring about 4 and 1/2 inches wide. The box is included and calls this an ” Upside Down Jigger”. The original cellophane the contained the jigger is enclosed.
It is available here at my Etsy shop: https://www.etsy.com/listing/632571601/irvinware-trip-jigger-1970-patent
To read more on the history of roll over jiggers, see my blog post