I've had 3 Cory rods for awhile using them in my 8 cup Yama vac pot. 2 of them say Cory Filter Rod, Pat. Des. 114097, U.S. PAT. 1927287 and 1 says New Cory Rod, Pat. Des. 1931076, U.S. PAT. 1935587. They work well, but sometimes they will stall a bit and I have to set my grinder on 2 or 2 1/2 setting to get a 1 1/2 minute kick down. My grinder settings go from 1 (French press) to 8 (Espresso) with 5 being for drip.
I recently picked up a Westinghouse 8 cup vac pot that the seal is not brittle or cracked and is pliable, but the fit is too loose for it to work. It also had a Cory rod in it. That rod works great in my Yama. At number 3 grind setting the kick down is 45 seconds, at the 4 setting it's 1 1/2 minutes, and at the 3 1/2 setting it's one minute five seconds kick down.
That Cory rod is unlike any that I've seen. It is marked Cory Filter Rod and has Pat. Des. 114097 but no U.S. PAT. number. The "handle" that sticks up in the upper bowl doesn't have the ribs and dots on it like the other 3 do, it's just smooth except for the letters and numbers. The "head" at the top is round and not square like the others.
I looked up the design number at the U.S. Patent Office and it shows the square headed drawings from the 1939 patent.
What do I have here?
I've attached a couple of photos, the New Cory Rod on the left, the other two shorter stemmed Cory Filter Rods in the middle, and the one I just got with the Westinghouse on the right.
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