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  1. #481
    Principal Administrator John Hubby's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: gintarasb64)

    Quote Originally Posted by gintarasb64 View Post
    Last week I received this beautiful GB skeleton clock. Any information about the clock is very interesting for me.
    Gintaras
    Gintaras, congratulations and thanks for posting! Your GB skeleton appears complete and original including the pendulum, but with a missing suspension guard. The one with rounded top sold by Michael Kiss in Australia is a perfect replica of the correct suspension guard for your clock.

    Your clock was made in January 1910, in the first of four "batches" of skeleton clocks made in 1910 and 1911. There is a lot of information about all this in the thread link posted by Kurt. I still need to post photos of the dial variations I have documented in that thread, hopefully can find time to do that later this week.

  2. #482

    Default Re: 400 Day Clock Indentification & Suspension Help (By: John Hubby)

    John , Thank you. The suspension guard is included, I just took off it - need to replace suspension spring. Maybe you can also take a look at my post http://mb.nawcc.org/showthread.php?1...=1#post1130612 and probably provide more info ?

    Regards
    Gintaras

    Quote Originally Posted by John Hubby View Post
    Gintaras, congratulations and thanks for posting! Your GB skeleton appears complete and original including the pendulum, but with a missing suspension guard. The one with rounded top sold by Michael Kiss in Australia is a perfect replica of the correct suspension guard for your clock.

    Your clock was made in January 1910, in the first of four "batches" of skeleton clocks made in 1910 and 1911. There is a lot of information about all this in the thread link posted by Kurt. I still need to post photos of the dial variations I have documented in that thread, hopefully can find time to do that later this week.

  3. #483

    Default Re: 400 Day Clock Indentification & Suspension Help

    Here goes picture of the gb mercury pendulum clock.
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    Last edited by John Hubby; 08-19-2017 at 10:03 PM. Reason: Removed oversize photos

  4. #484
    Principal Administrator John Hubby's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: Kamil Urbanowicz)

    Quote Originally Posted by Kamil Urbanowicz View Post
    Here goes picture of the gb mercury pendulum clock.
    Kamil, thanks very much for posting your GB with mercury pendulum. It will be appreciated if you would also post photos of the movement including back plate and side views, so we can identify the upper suspension bracket and the back plate itself. Is the movement serial number the same as the one on the pendulum disc?

    For info, the pendulum is a marriage. Here is why:

    1) The GB pendulum disc, which is an original from a No. 23 GB disc pendulum, is scribed with serial number 2088453. This serial number was made about April 1909.

    2) The patent for the cross-tube mercury pendulum, DRGM 453568, was granted to Andreas Huber on January 23, 1911. It is thus impossible that the mercury tubes could have been available to mount on a GB pendulum disc in 1909.

    3) The presentation inscription is dated November 21, 1912. That shows the pendulum now with the clock could easily have been assembled using the disc from the original GB pendulum and the "top works" of one of the early mercury design pendulums produced after the patent was granted. In fact, looking closely at the pendulum I see the following:

    >> The disc is without question a standard GB No. 23 pendulum disc. It has been modified by addition of four holes on the center diameter of the flat top to enable mounting of the mercury pendulum cross-tube support frame. The original mounting screws from the mercury pendulum were likely used.

    >> The GB center post, adjusting rod, and weights were used instead of these same parts from the mercury pendulum. This was likely done because the adjusting weights for the mercury pendulum have guide pins that require slots in the top of the pendulum disc, which the GB disc does not have. The GB center post had a threaded hole in the top center where the gallery and hook shaft screwed in, that hole appears to have been filled with solder. The adjusting rod position screw on the side of the center post is visible in the photos; the mercury pendulum version has that screw at the top center of the post.

    Here is a photo of an original No. 9 mercury pendulum, note the center post detail and compare to Kamil's pendulum.

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    Also note the quite different adjustment weights compared to the ones on Kamil's pendulum.

    One final comment regarding the use of the No. 9 mercury pendulum. Up to now, serial number matches between movements and the mercury pendulums have been found ONLY with Kienzle movements made from 1913 to 1920. While these pendulums have been found with other maker's clocks, none of them appear to have been original equipment with those clocks.

  5. #485

    Default Re: 400 Day Clock Indentification & Suspension Help

    Here is all i have. Interesting is that the outer arms that holds the tubes are thinner than the middle one?
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    Last edited by John Hubby; 08-27-2017 at 10:16 AM. Reason: Removed oversize photos

  6. #486
    Principal Administrator John Hubby's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: Kamil Urbanowicz)

    Quote Originally Posted by Kamil Urbanowicz View Post
    Here is all i have. Interesting is that the outer arms that holds the tubes are thinner than the middle one?
    Kamil, thanks for the additional photos. These confirm that the upper suspension bracket is No. 4 in the Repair Guide and that the pendulum disc and the movement have the same serial number.

    Regarding the mercury tube support arms, I also noticed these were thinner than the center supports on your pendulum. I checked the ones I have and they are all the same thickness. I also looked at a number that I have in my photo archives and they all have the arms and the centers of the same thickness. I can only presume that whoever made the modified pendulum did not have the original parts and made the two arms with the thickest brass stock he had available. The arms look quite similar to the originals except for the thickness, so it should work OK.

  7. #487
    Registered user. roughbarked's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: simpsonm1)

    This clock came in today. The lower suspension block was unattached but present. Someone had at some time in the past, attempted to solder the bottom block to the suspension spring and the spring itself had been heat treated in the centre. After a quick examination I opened the bottom block and reinserted the spring, closed the block and hung the pendulum on. Of course this required me to remove the guard rails and the spring assembly to carry out this operation. Upon rehanging the spring and pendulum, the clock began to run and kept time within a few minutes over the course of the rest of the day. I don't have a list of backplates or numbers to be able to determine the date of manufacture but I am reasonably sure that it is a Gustav Becker.

    The last photo is of the clock just before I left the shop.
    Hmm. The first two thumbnails show up sideways. Had thought I'd deleted those.
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    Last edited by roughbarked; 09-06-2017 at 12:27 PM.

  8. #488
    Registered User KurtinSA's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: roughbarked)

    This was made in the 1925 timeframe...John Hubby says GB stopped using the 7-digit numbering system and started over with 1. Is it a miniature? The columns seem kind of short.

    Kurt

  9. #489
    Registered user. roughbarked's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: KurtinSA)

    I wouldn't class it as a miniature, no. The overall clock is large compared to the size of the dial. It has a small dial, 3 inches I'd guess. The suspension spring is at least 12 cm long or more. Don't quote me because I didn't measure it. Overall, the clock stands at approx 35+ cm with the dome on.
    Last edited by roughbarked; 09-06-2017 at 01:28 PM.

  10. #490
    Registered User KurtinSA's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: roughbarked)

    OK, I guess it's just the pictures. Most of my GBs are also in the 25-30 cm size. I have a GB built the following year and it's only about 25 cm high. BTW, according to the repair guide, the decorative brass piece under the dial is one of three styles, yours being style C.

    Kurt

  11. #491
    Registered user. roughbarked's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: KurtinSA)

    This bit?
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  12. #492
    Registered User KurtinSA's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: roughbarked)

    Yup!

    Kurt

  13. #493
    Registered user. roughbarked's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help (By: KurtinSA)

    Quote Originally Posted by KurtinSA View Post
    This was made in the 1925 timeframe...John Hubby says GB stopped using the 7-digit numbering system and started over with 1. Is it a miniature? The columns seem kind of short.

    Kurt
    This site suggests that: 1927 Restart at 0001 due to take-over by Junghans. http://www.aussieclocks.com.au/details.php?p_id=137

  14. #494
    Registered User KurtinSA's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help

    I'll let John Hubby comment on the Aussie website. John should have the best data on the GB clocks:

    http://mb.nawcc.org/showthread.php?1...ll=1#post71775

    The Australian site is dated 2011 while John has been updating things, his latest being in 2016 (per the edit note at the bottom of the thread).

    Kurt

  15. #495
    Registered user. roughbarked's Avatar
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    Default Re: 400 Day Clock Indentification & Suspension Help

    Fair enough. Thanks.

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