Need help with small German balance wheel clock

Discussion in 'Clock Repair' started by THTanner, May 8, 2019.

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  1. THTanner

    THTanner Registered User
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    Jul 3, 2016
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    This is a small (2 1/2 inch) round clock that is inserted into a hearth side match holder made of caste bronze - I think.

    It runs well but needs a service. The main issue I am puzzling over is the regulating lever. It is completely loose and flops around freely if you turn the clock. It appears to have been bent at some point and makes almost no contact with the back plate. But before I try to bend it so it has enough friction to stay where you put it, is there perhaps a spring washer missing? There is very little distance between the level and the back plate, but I do have some tiny spring washers that could fit under there.

    Also, the fork has an extended piece that looks like it is to be used to stop the movement in order to start it at an exact time? This can only be reached when the movement is taken out and partially disassembled, so it does not appear to be especially useful in this case.

    Any idea of the maker and approximate age. The front plate is pinned and the maker's mark is on both plates.

    thanks
    tom

    IMG_3810.JPG IMG_3811.JPG IMG_3812.JPG IMG_3813.JPG IMG_3815.JPG IMG_3816.JPG IMG_3817.JPG
     
  2. R. Croswell

    R. Croswell Registered User

    Apr 4, 2006
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    I do not recognize the maker. You may be able to loosen the balance screw on the front of the movement which will allow the balance screw on the back to be tightened enough to prevent the regulator from flopping around. Just make sure that there is room to shift the balance without causing a problem.

    RC
     
  3. Uhralt

    Uhralt Registered User
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    I think it's a Kienzle clock. The extension on the fork is probably a counterweight to balance the fork. I have seen similar on some old American lever clocks.

    Uhralt
     
  4. tracerjack

    tracerjack Registered User
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    i also thought Kienzle from the mark.
     
  5. THTanner

    THTanner Registered User
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    Thanks to all - with that suggestion I find that the mark is similar to Schlenker and Kienzle from about 1908 .

    The extension on the fork certainly does provide some counter balance. It is bent to not hit the side of the casing and to not hit a pinion near it, but that most certainly is the result.

    I will try a bit of shifting of the balance and see if the regulating lever tightens.
     
  6. THTanner

    THTanner Registered User
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    #6 THTanner, May 8, 2019
    Last edited: May 8, 2019
    Next question - with a left handed screw on winding - what do you all use for a let down tool?

    I used a slotted let down designed to slip over a generic winding key. Just wondering if there are other tools that screw onto these threaded winding arbors?

    IMG_3818.JPG
     
  7. Uhralt

    Uhralt Registered User
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    The good old piece of broomstick with a slot on top to accept the wings of the key and a bore to accept the key arbor.

    Uhralt
     
  8. R. Croswell

    R. Croswell Registered User

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    Get something like a piece of a wooden broom handle, bore a hole the size to fit center part of the key, cut a slot for the wing,

    RC

    Sorry Uharlt, we posted at almost the same time.
     
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  9. Uhralt

    Uhralt Registered User
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    And the same proposal!

    Uhralt
     
  10. THTanner

    THTanner Registered User
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    Thanks - I made a small wooden dowel version - then found the generic key let down in a box of tools I inherited from another shop. Both worked quite well.

    The balance wheel shifted nicely and regulation is again possible.
    thanks RC
     
  11. THTanner

    THTanner Registered User
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    This runs well at 240 bpm - 14,400 bph - and appears to be an 8 day movement.

    Thanks for all the help -
     
  12. Uhralt

    Uhralt Registered User
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    Sounds good! I would be surprised if the clock runs for 8 days. I would expect maybe a couple of days. Let us know what you find.

    Uhralt
     
  13. THTanner

    THTanner Registered User
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    so far about 40 hours and needing a winding soon - so apparently a 30 hour with a bit extra -
     
  14. Uhralt

    Uhralt Registered User
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    That's what I thought. The spring just isn't beefy enough for an 8-day with this kind of escapement.

    Uhralt
     

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