Need Information on a Bulova Lip-like Movement

Discussion in 'Electric Horology' started by TockDoc, Nov 6, 2019.

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  1. TockDoc

    TockDoc New Member

    Nov 6, 2019
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    This is a smaller 1.5v movement used in the back of table picture (shows a small clock in front). Trying to repair but can find no information on how it works! Any ideas or links to data? Looks very simple, but the balance wheel will not oscillate. Thanks folks!

    Bulova clock movement.gif Bulova clock movement.gif
     
  2. roughbarked

    roughbarked Registered User

    Dec 2, 2016
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    19 AO is the Bulova calibre #.
    I'd be checking the resistance of those coils. somebody has resoldered the connections one one of them.
     
  3. Chris Radek

    Chris Radek Registered User
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    Apr 13, 2014
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    Test that carbon comp resistor too...

    This is dated 1965 so the coils might be the same 15 micron wire they were using in Accutrons.

    Is the balance free? It should oscillate a few times and advance the clock on a good puff of air. If yes, the problem is electric; if no, the problem is mechanical (and also maybe electric...)
     
  4. praezis

    praezis Registered User

    Feb 11, 2008
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    Movement is Ebauches SA cal. 9000.
    Bph = 18000
    It is controlled by a mechanical contact that can be an issue, too.

    Frank
    ESA9_1.jpg ESA9_2.jpg
     
  5. TockDoc

    TockDoc New Member

    Nov 6, 2019
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    These are super comments! Thanks so much. Coils good, 2.2K good. Wiring good. Balance wheel free and will oscillate freely until it is attracted to one of the coils. Culprit seems to be corroded balance wheel contacts, as suggested. Again, thanks folks! Your a good group of expertise. (~8
     

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