GB

Discussions about Torsion Pendulum Clocks

Re: GB

New postby veritas » Fri Sep 27, 2013 7:32 pm

Also make sure not too much play between impulse pin and fork, a sheet of paper should just go in between fork and pin.
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Re: GB

New postby Irwin » Fri Sep 27, 2013 8:14 pm

I'll use your guideline for the fork gap.
The clock is still gaining a lot of time, so I have ordered another pack of wires, two sizes down.
IF
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Re: GB

New postby John Arrowood » Fri Sep 27, 2013 8:14 pm

Some Beckers require a thinner suspension spring than what the book says. I think the spring on mine had to be thinned a bit using emery cloth before it could be regulated. It has been several years since it was last serviced and when I moved 5 years ago I broke the spring just above the lower block and haven't been in the mood to try to replace it.
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Re: GB

New postby Irwin » Sat Sep 28, 2013 4:57 pm

It seems that this is going to be the case for this clock.
I timed the rotation time and it is exactly 7.2 secs, which is where it is supposed to be.
So, it looks like everything is as it should be, and the only problem is that it runs too fast.
It reminds me of the joke where two surgeons are discussing an op they did together - It was a marvellous and technically very successful op, the only problem was that the patient died...
The smaller wires are on the way.
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Re: GB

New postby John Arrowood » Sun Sep 29, 2013 12:38 pm

I misspoke on my previous post. The abrasive I used to thin the spring was crocus cloth, a very fine abrasive attached to a piece of cloth.
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Re: GB

New postby veritas » Sun Sep 29, 2013 4:54 pm

I have tried thinning a susp spring but never seem to have luck, usually they break or bend out of shape for me. Since a pack of three is about 6 dollars i just buy a new pack, as i have about 15 clocks of this type and will likely use them later.
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Re: GB

New postby Irwin » Tue Oct 01, 2013 10:17 pm

The clock has been running continuously for a couple of days, though running fast.
Today, I changed the wire, for the new one, put it onto the clock and found that the clock is no longer running.
It looks to me like there is no pressure on the escape wheel from the gear train. I can't see anything out of place, and I didn't knowingly touch anything except change the wire.
Tomorrow, I'll strip it down again and maybe something will turn up.
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Re: GB

New postby veritas » Wed Oct 02, 2013 5:44 am

That,s one reason why i take the main spring out and clean it and lube it. Your main spring might be sticky causing this to happen. I have experienced similar problems.
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Re: GB

New postby Irwin » Wed Oct 02, 2013 10:30 am

Got it back running again.
I removed the hands and dial, put the movement back on its mount to see if I could spot the problem, and it ran straight off.
It seems that somehow, and I don't know how, the hands were responsible for stopping the clock. They are a bit tight, so maybe they were binding somehow.
Now I am back to beat and regulation.
It's not an easy clock.
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Re: GB

New postby veritas » Wed Oct 02, 2013 1:12 pm

Yes that is one lesson learned. Hands too tight will stop these. I have one now i cant get the tension right, too tight it stops, too loose the hands dont advance.
And you are correct, not a easy clock to work on.
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Re: GB

New postby Irwin » Wed Oct 02, 2013 10:17 pm

Having fitted the smaller wire, it is now running slow.
Reasonable timekeeping can't be too far away.
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Re: GB

New postby Irwin » Thu Oct 03, 2013 9:37 am

It looks like I am getting near the end of this. The clock only lost 5 minutes overnight.
A little bit more to go.
The two sizes smaller than the recommended size wire seems to have worked for this specific clock.
I think it is starting to look good, but I can't clean up the dial any more that I have done, so I want to find a replacement. I have posted pics of what I am looking for on the Items Wanted thread.

D3.jpg


D4.jpg


D5.jpg
IF
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Re: GB

New postby Irwin » Fri Oct 11, 2013 3:31 pm

The 2 sizes smaller wire, switched the clock over from running fast, to running slow, and there wasn't enough adjustment on the weights to compensate, so I have ordered the intermediate size.
I have also found a replacement dial, and am waiting for it to arrive.
I also found where the hands were binding. The hour hand was a tight fit on the canon pinion so didn't slide on enough. When I secured the minute hand in place with the locking pin, it sometimes pressed against the hour hand, usually after several hours running, and so stop the clock for no apparent reason. I have widened the hour hand hole with a stake, and taken care to push it well back on the canon pinion, so now the clock is running continuously.
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Re: GB

New postby veritas » Wed Oct 16, 2013 5:01 pm

Please post a picture of your clock with the replaced dial.
Yes its quite a learning experience working on 400 day clocks.
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Re: GB

New postby Irwin » Thu Oct 17, 2013 2:10 pm

This is it with the replacement dial.
I have also fitted the new wire and now I am starting the beat and regulation process - once again.
These are fussy clocks.

GB001.jpg
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