Half-Hour Bell on Sessions Clock Does Not Sound

beach320

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Jun 13, 2022
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When I turn the hands of my Session clock manually, it chimes correctly on the hour and a tiny bell sounds on the half-hour. However, when the clock is running on its own, it chimes on the hour but the bell at the half-hour does not ring. Anyone have an idea about why the bell does not sound when the clock is ticking on its own?

Thanks
Larry

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JimmyOz

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Feb 21, 2008
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Doing it manually which is quicker that if it did it itself does not give the lifting arm on the shaft time to slip off.
Check the lifting arm is not slipping off the hands arbor, and adjust it if it is.
 

JTD

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Sep 27, 2005
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And you might try turning the bell round just slightly to find the 'sweet' spot. Bells often don't sound the same (even strike at all) unless they are in the best position.

I have the much same problem with a Waterbury carriage clock with repeat mechanism. Unless the bell is in exactly the right position, the sound is a barely audible click - if it's the right position, it's a nice clear 'ting'.

JTD
 

Bernhard J.

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Bells often don't sound the same (even strike at all) unless they are in the best position.
Yes, and that can be generalized for any kind of vintage clocks with bells. It indeed can make a great difference and should be tested out before starting to bend the bell support or hammer.

Cheers, Bernhard
 

Willie X

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Feb 9, 2008
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Those bells are usually riveted to the shaft, not turnable to adjust.

Just slightly bend the hammer wire, to move the hammer a little closer to the bell. A change of maybe 4 thou (1/10 mm) will do it.

Willie X
 
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Dick Feldman

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Sep 1, 2000
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Your clock does not chime and never has. Your clock strikes.
The strike on the half hour is not really related to the hour strike.
The half hour strike is called a passing strike.
If you are looking for an answer, read the literature about passing strike.
Likely the cure is a bending adjustment but you should have some background on what you are working on,
Dick
 
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beach320

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Jun 13, 2022
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Those bells are usually riveted to the shaft, not turnable to adjust.

Just slightly bend the hammer wire, to move the hammer a little closer to the bell. A change of maybe 4 thou (1/10 mm) will do it.

Willie X
Thanks, Willie. Just a slight bend is all it needed. Strikes on the half-hour as designed.
 
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