Grandfather clock hammer bounce

Discussion in 'Clock Repair' started by oakcircle, Mar 19, 2017.

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  1. oakcircle

    oakcircle Registered User
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    Dec 30, 2010
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    Brandon, MS
    I have an English grandfather clock circa 1830 that has a hammer that bounces and is very noisy when the clock strikes. I have attached two photos that show there is obviously something missing. From what I have read, the missing part may be either a stop or a hammer spring. I have tried attaching pads of felt to the bar that has a screw hole, but it's still bounces and makes a lot of noise. I would appreciate any information that could help me correct this problem. Many thanks.
     

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  2. wow

    wow Registered User
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    Jun 24, 2008
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    Looks like there is a stop missing. The hole in the pillar is threaded, thus, a screw of some sort was there. I suspect that the lift is too great and the hammer moves too far causing too much rebound. If you screw a stop screw in and set the hammer tail further away from the bell, then bend the tail so the head is about 1/4 inch away from the bell, the lift should be less causing less rebound. Make any sense?
     
  3. oakcircle

    oakcircle Registered User
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    Dec 30, 2010
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    It makes sense. I'll look for a screw that fits, try it, and let you know if it works.
    Thanks for your advice!
     
  4. THTanner

    THTanner Registered User
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    Jul 3, 2016
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    I don't think it is just a screw. I serviced one similar a bit ago and a screw at that location held a piece of leather to cushion the blow against the pillar and keep it quiet and dampen the bounce. I don't know if that was original or someone else's work, but it did a good job.


     
  5. novicetimekeeper

    novicetimekeeper Registered User
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    Jul 26, 2015
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    I have not come across one with a leather stop, usually there is a vertical spring up the side of the plate acting on the hammer.
     
  6. novicetimekeeper

    novicetimekeeper Registered User
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    I have occasionally seen this done, but not sure if it is original or a later addition.

    [​IMG]
     

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  7. dAz57

    dAz57 Registered User

    Dec 7, 2011
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    Before you start bending anything have a look at the hammer spring.

    [​IMG][​IMG]

    The hammer spring on most of these English long case clocks also doubles as the hammer banking, you can see from the two photos here where the hammer is pulled back and the spring is pressing on the tail of the hammer, and then at rest the top section of the hammer tail sits on the flat section of the spring.

    This is normally enough along with the hammer set the correct distance from the bell to dampen the hammer so it doesn't vibrate or bounce too much.

    And some clocks do have a short brass plate added to help dampen the hammer which is what probably missing from your clock.

    The hammers do pull back a fair way on these, they are meant to be loud.
     

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  8. shutterbug

    shutterbug Moderator
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    Oct 19, 2005
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    You didn't ask about it, but I detect some serious wear on the gear teeth in your movement, oakcircle. That should be addressed before long. It appears to be mostly the 3rd and 4th wheel of the strike side, but you might have the same issues on the time side too.
     
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