Most visitors online was 1660 , on 12 Dec 2020
Yes, I thought it looked like it had been extended. It isn't original to be that long, I have month going weights here of 15/17/20 pounds and they are all about the same lengths, no more than an inch difference.if you look at the long weight it has been extended longer. This is very odd. Like it was made but found not to be heavy enough so added to.
It’s quite possible that an owner in the past found that the clock was stopping, and instead of getting it serviced just added weight until it ran again..Yes, I thought it looked like it had been extended. It isn't original to be that long, I have month going weights here of 15/17/20 pounds and they are all about the same lengths, no more than an inch difference.
Yikes. that was the foot of the bell standard.... Tsk, tsk.It would also be interesting to see what the purpose of the spring operating on the escape wheel pivot is for, unless it is not a spring, but a form of end stop. I would expect an associated one on the front plate, if it is an end stop
Huygens started it, with his loop. Twin barrels are another form of maintaining powerMaintaining power is seen on 17th century longcase, with bolt and shutter.
You get deadbeat on centre seconds longcase without maintaining power but you have to stop those to wind them so the escapement is not at risk.Huygens started it, with his loop. Twin barrels are another form of maintaining power
“American and Vienna regulators (later 19th c. on) maintaining power with dead beat seems standard.”
Chris, a quick check and it seems the Viennese were Using Harrison style maintaining power early 19th century. I found 3 fairly quick. 1810, 1811 and 1820. Two of them are in Rick Ortenburgers book, the other is in a book printed for a NAWCC Symposium a few years ago. It documented part of Victor Kochaver collection. He was a major collector.
American clocks, it does seem that MP wasn’t regularly implemented until later and that was in production regulators. I’m pretty sure there were some unique regulators made earlier, but havent found them yet.
I have a few dead beat clocks without MP.