Dutch striking clock strikes 17

Discussion in 'Clock Repair' started by novicetimekeeper, Apr 12, 2017.

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  1. novicetimekeeper

    novicetimekeeper Registered User
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    Well I have got my early 18th Century Dutch striking longcase set up. It refuses to tick which must be addressed but also it is a bit erratic in how much it strikes.

    I can see this having to go away to be repaired, always was a possibility, but I would appreciate a bit of guidance on what I'm looking for.

    The odd drive rope isn't helping I think, that will be changed to conventional linen rope. The lever that falls into the gaps in the countwheel has seen better days. The countwheel itself looks a bit ropey.

    The clock strikes at the half on the small bell and at the top of the hour on the large bell. Currently it seems out of synch because it strikes the old hour at the bottom and the new hour at the top.

    The hammer choice is made by a cam wheel that moves a lever like a tappet and pushes the hammer arbour across so that the correct hammer goes in line with the pins on the great wheel.


    As well as being out of synch you occasionally get a bit of a run on the strike.

    [​IMG] [​IMG] [​IMG] [​IMG]
     
  2. Randy Beckett

    Randy Beckett Registered User
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    I never heard of one before, but it looks like that count wheel might cause it to strike in military time. 1 to 23 times
     
  3. novicetimekeeper

    novicetimekeeper Registered User
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    It's a dutch striking countwheel. I wondered about the number of gaps but tinker pointed out how countwheels work and confirmed this was right.

    The count wheel looks like it has had a hard life but I don't think the design is the peoblem.
     
  4. novicetimekeeper

    novicetimekeeper Registered User
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  5. Tinker Dwight

    Tinker Dwight Registered User

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    How about a couple more pictures. One of the count wheel with the
    crutch out od the way, in the stopped position and one from the
    other side so we can see how the warning and stopping works.
    Also check that the fly is not too tight.
    Tinker Dwight
     
  6. bangster

    bangster Super Moderator
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    "Great Heavens! That's the latest it's EVER been." :Party:
     
  7. novicetimekeeper

    novicetimekeeper Registered User
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    #7 novicetimekeeper, Apr 12, 2017
    Last edited: Apr 12, 2017
    Will take some tomorrow in daylight, I don't have a test stand so will have to pull the movement out of the case again and put it on some blocks.

    The fly has had a few repairs, I know that.

    I have had it working properly turning the minute hand but I think without having both hands installed properly I may have had too much slip on the hour hand. It fits on a square on the hour tube that doesn't seem to be in synch with the minute even though it was when I started.

    I have this pic, might have others, but will take more tomorrow.

    [​IMG]
     
  8. novicetimekeeper

    novicetimekeeper Registered User
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    Have found a couple more I took at the auction viewing

    [​IMG][​IMG]

    BTW ignore the iron bell hammer spring and nicely carved bell hammer stop, they don't belong on this clock but seem to be a free gift from the vendor!
     
  9. Tinker Dwight

    Tinker Dwight Registered User

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    I don't see how the warning works but have an idea.
    As for running, you might look at the minute wheel.
    It looks a little wonky.
    The reason I wanted a picture of the count lever is that it looks
    to be touching the edge of the count wheel slot.
    That is a no-no.
    With the clip off, that is holding the count wheel, can you move the
    count wheel a little clockwise, as seen from the back?
    If not, you might first try moving the wheel behind the
    count wheel a tooth.
    I suspect that may still be too much. The next place to adjust,
    you won't like. it is moving the main wheel one tooth or two on
    the arbor to the maintenance wheel. ( the main wheel ccw
    as seen from the back ).
    This is like a fine adjustment but requires some disassembly.
    Before doing that, I suspect the count wheel is mounted on a square
    arbor.
    Try rotating it to the various 90 degree point to see if you can
    get it to not touch the edges of the slots in the wheels.
    Tinker Dwight
     
  10. novicetimekeeper

    novicetimekeeper Registered User
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    Thank you for all of that, very helpful. Usually posted frame movements are not too hard to work on but this one has some complications that might make it beyond my skill set. I will try the easier steps tomorrow in daylight and take more pics, thank you.
     
  11. novicetimekeeper

    novicetimekeeper Registered User
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    I have not taken anything apart, but here are some more pics

    [​IMG][​IMG][​IMG][​IMG]
     
  12. Tinker Dwight

    Tinker Dwight Registered User

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    It is always interesting that on these Dutch clocks that the count wheels
    always seem to look so crude.
    Anyway, things I note when looking at the pictures.
    The maintenance wheel looks to have been reworked. It has
    two stop notches. When you take it apart, you might verify that
    they are exactly 180 degrees apart, where they stop.
    There looks to be too much warning run. I'd think you only
    need less than 1/4 turn. It is set at 180 degrees. ( a minor thing
    but this makes setting that hammer lifts difficult ).
    The main thing that I see as an issue is that the count lever
    end is bent at an angle. Many compensate for putting the wrong
    teeth position by bending this end. I don't think on this clock
    that is a good idea. The end is so short that it makes it curved.
    The end should be dead straight and point the the center
    of the count wheel. It must fall cleanly into the count wheel slots.
    With any bend it could be catching on an edge, causing skipping.
    Adjustment should be done by moving a
    tooth or so between the maintenance pinion and the main wheel.
    It is a compensation between this and the last strike released.
    The clock worked once and should be able to be adjusted.
    Good luck
    Tinker Dwight
     
  13. novicetimekeeper

    novicetimekeeper Registered User
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    The count lever is a bit bodged altogether and I did wonder if that wasn't right. I see that as I have been playing with the strike there are bright rubbed areas appearing on the countwheel which must come from contact with that lever.

    I'm glad you said the countwheels normally look that rough it certainly doess and I did not want to have to replace it.

    It is very close to working and I have established what it does. I know the chap who looks after my clocks would love to get his hands on it and I think I might leave it until then. I'm very pleased with it, it is as rare as hen's teeth and needs to be looked after properly.

    Thank you for all your help.
     
  14. Tinker Dwight

    Tinker Dwight Registered User

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    It is not that unusual for the lever to drag on the count
    wheel. It normally rides on the maintenance cam but
    there is no reason it couldn't be on the count wheel.
    The depth that the count lever falls into the count wheel may
    also be an issue. It can be holding the maintenance lever
    from properly engaging the cam.
    Tinker Dwight
     
  15. novicetimekeeper

    novicetimekeeper Registered User
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    The countwheel seems to have gone shiny on the side in places, I haven't studied it but I suspect the end of the lever is a bit rough.

    The only problem with giving this to him to fix apart from cost is he currently has my verge dial clock and will next get my verge bracket clock so it will be on the end of a long queue.
     
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