Gustav Becker wounded 400 day clock

Discussion in '400-Day & Atmos' started by Raymond Gocken, Oct 23, 2019.

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  1. Raymond Gocken

    Raymond Gocken Registered User
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    Aug 29, 2013
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    Attached are some photos of a Gustav Becker 400 day clock that is missing some parts. Specifically what attaches and adjusts the suspension spring. Seems there is a post but no adapter or fiting to mount the spring. Also, there is an adjusting mechanism on the top of the spring mount and a fork just below it. Is it missing a pin?

    thanks for any info and help. I have scoured the internet put found nothing helpful....

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  2. Steven Thornberry

    Steven Thornberry User Administrator
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    I have moved this to the 400-day clock forum for better exposure.
     
  3. KurtinSA

    KurtinSA Registered User
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    Nov 24, 2014
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    Here's a picture of the attachment at the top of suspension spring. This is needed to adjust the beat when you turn the knob at the top of the saddle.

    Kurt

    05GBEscape.jpg
     
  4. Les Sanders

    Les Sanders Registered User
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    the only thing is see missing is the suspension guard and screws, do a ebay search for a Gustav Becker Suspension guard.
     
  5. etmb61

    etmb61 Registered User
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    #5 etmb61, Oct 23, 2019
    Last edited: Oct 23, 2019
    It looks like you are missing this pin:

    bracket parts2.jpg

    Also, you have the wrong type of screw in position. What you have may work, but the correct screw would probably make a difference in getting the clock going.

    bracket parts3.jpg

    Eric
     
  6. Raymond Gocken

    Raymond Gocken Registered User
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    #6 Raymond Gocken, Oct 24, 2019
    Last edited: Oct 24, 2019
    Awesome thanks to you three....
     
  7. Raymond Gocken

    Raymond Gocken Registered User
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    Aug 29, 2013
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    As far as the screw position pin, mine appears to have had a "bushing" inserted on the end. I can make one from brass on my lathe and see if it fits and works. The missing pin is easy enough to make but I need the diameter and length as well, if possible, what threads it has as it appears to thread into the pointer. I know I am asking a lot but the probability of finding these parts are very slim... thanks you all of you greatly....

    Bracket.jpg
     
  8. etmb61

    etmb61 Registered User
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    Oct 25, 2010
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    The pin is 1.7mm in diameter as are the threads. The thread pitch is 0.35mm. The exposed length of the installed pin is 12mm, and the overall length is 14.25mm.

    Eric
     
  9. Raymond Gocken

    Raymond Gocken Registered User
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    Aug 29, 2013
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    would you also know the thread specs for the little bar that runs through the weights on the disc pendulum? I have one end that will not screw back on after I polished the parts. Hate to do any forcing. I will have to find a set of die and thresding tool. Thanks for all your help, much appreciated.
     
  10. etmb61

    etmb61 Registered User
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    Hi Raymond,

    I had to do some checking on the pendulums I have and this is what I've come up with. The (major) diameter of the threads I checked varies between 2.6mm and 2.7mm. The thread pitch appears to be 0.55mm. This combination is not a standard thread size. It is important to note that the disk stamped "F S" is the left hand thread end of the adjusting rod which should be the squared off end on a Becker pendulum.

    Eric
     
  11. Raymond Gocken

    Raymond Gocken Registered User
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    Looks like my work is cut out for me.... better get that thread attachment for my Sherline..
     
  12. etmb61

    etmb61 Registered User
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    I just used mine tonight. They come with a carbide tool. I broke three of those trying to make small threads and then made my own from HSS. Just a thought.
     
  13. Raymond Gocken

    Raymond Gocken Registered User
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    I used a exacto knive with a sharp blade and chased through the damaged threads numerous times very carefully. It worked....
     

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