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So, it is very similar to the Korean brake/fly. I don’t think I will even try to make one. The Korean ones are junk. I already thought about your suggestion, Willie. Just cut the cup off and put a fly on the arbor. Thanks, gentlemen.This would appear to be the patent referenced.
Thanks, John. Yep, the Koreans must have copied it. Their shoes are made of plastic and tear up easily. I have one in my shop that has a black rubber thingamajig inside the cup that is split and expands with centrifugal force braking the arbor. When it gets old, however, it gets brittle and does not expand. Junk!The Gilbert fly worked as a centrifugal governor; as the strike train started running two shoes with leather on one side spread out and rubbed against the sides of the cup and regulated the speed of the fly. I ruined mine by putting the fly in an ammoniated cleaning solution which destroyed the leather in a couple seconds or less.
Hey, I like that idea, Willie. The stops are still on the clock and the springs look like original heavy strong springs. I’m gonna try setting the stop at about 3/4 wound and see what happens. I hate to do away with the cup since it was part of the original patent and rare. Who knows…… some ambitious repairman may want to try and make the little brakes 50 years or so from now when I’m long gone.If you loose the little drum, you can add a little more fly. Even with max surface area it will still a little fast. I just back off on the windup a bit.
Next one I do, I'm going to experiment with little spring arms running in line with the arbor.
Can you tighten up the springy part? It might slow down some. Most Korean clocks I have repaired tend to keep very good time. They certainly are not a great quality.
Thomas, the springy parts inside the cup are missing. Is that what you are talking about? I thought about using some from a Korean movement but opted for the fan only. Actually it is not much faster than most old American movements. I’ll try the stop set thing and see what happens.Can you tighten up the springy part? It might slow down some. Most Korean clocks I have repaired tend to keep very good time. They certainly are not a great quality.
Thomas, I already have it back in the clock. If I have to remove the movement for some reason I will make a video. It is very much like the patent posted by Steven above and I have worked on several Korean movements that had a brake similar to mine without a fly.Very interesting Will! It looks like an item in clock vendor's catalog. Can you post a video of that?