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Incorrect pendulum bob

EdwardWells

New User
Nov 16, 2022
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Hello!

I have a Ingraham black mantle clock from 1899. It’s extremely sensitive and will tick noticeably out of beat if the clock is not perfectly level and will eventually stop. It’s also very slow although the timing regulator is set to the fastest setting. It’s been recently cleaned and oiled. I’m wondering if the problem is that it has the wrong weight pendulum bob. Even though the clock is an Ingraham, the bob that it came with is from a Sessions clock and weighs 3oz. All of the Ingraham bobs from that era that I could find are much lighter. My question is, would a lighter pendulum bob make a difference and if so, what weight should I get?

I attached pictures of the clock, movement, and the bob it came with. The patent on the movement is Oct 8 78 Nov 11 79

Thanks for any help!

561998B4-8B12-4A4D-A4EA-669F20EDF04E.jpeg 231F73CE-1FBA-482B-B6A7-2E43D8DCBF58.jpeg 51BE7549-517F-42F9-A415-3E43802F1126.jpeg
 

Willie X

Registered User
Feb 9, 2008
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It's probably not the pendulum. Similar clocks run well with 5 ounce pendulums.
The clock in the photo is run down. It has to be running if it's run down?? Willie X
 

shutterbug

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Oct 19, 2005
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If it is still losing time when fully wound, you might have to shorten your suspension wire. Set the fast/slow setting to the center position first, then cut it at the bottom hook to shorten it. Go slow. It might take more than one cut. When you get it close, use the fast/slow adjuster to make the final small adjustments.
 

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