I recently got hold of three nice vintage flip clocks. No time keeping mechanism is present but there is something to advance the time on the clock. This mechanism has one major component labelled BT1200 Type 5. Nothing else. I can't phantom what this thing does. 
The very thin wiring going in (extreme left) suggests it is not a mains component (I think).
More images can be found on [my G+ account].(https://plus.google.com/102458454375959628481/posts/Yh4YQhrHnXU)
Answer
Just had a peek at your pictures. As in my comment, it looks like a synchronous AC motor. It is basically a coil of very thin wire (it doesn't have to drive a heavy load and you don't want a clock to use a lot of electricity).
The motor will step in the 50Hz rhythm of the the mains power and as long as all bearings and things are in order, the accuracy can be pretty good as long term mains frequency is very stable at 50Hz (in Europe)
It probably takes 220V, but I didn't see a type-plaatje (not sure what is called in English, but I bet you can read Dutch). I think you can rewire the clock for 110Vac with the small blue wire at the kroonsteentje but I don't think you'll want to do that.
This page shows a nice schematic presentation of how I think what's in it: Scroll down to Synchronous Motors
No comments:
Post a Comment