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  1. #1
    westminster
    Guest

    Default Chelsea Ship's Clock Question

    Hello All! I recently acquired a time-only Chelsea ship's clock which seems to me to have a balance wheel problem.
    THE CLOCK:
    The chrome-plated clock itself is just over 7" diameter with a black face. It swings out from a chrome-plated deck mount to gain access to the winding and setting holes in the back.
    The face is marked:
    MARK I. DECK CLOCK
    U. S. NAVY
    (N) 155 1938
    The chrome-over-brass movement is about 2-3/4" diameter with a (gold?) plated platform escapement.
    THE PROBLEM:
    The clock would only run about 6 days on a full winding. I disassembled everything except the platform escapement for cleaning. After reassembly, I carefully oiled everything. I borrowed watch oil and watch oilng tools to carefully oil the escape wheel pivots. I had no access to the balance wheel pivots (those jewels are sealed), so did not touch them.
    All this seemed to have no real effect on the timekeeping or length of running.
    I THINK the problem lies in the balance wheel- here is what I observed:
    When the clock lies on its back with the movement (and platform escapement) flat, the balance wheel has a good, strong back-and-forth oscillation. When I set the movement upright, the back and forth motion of the balance wheel is NOTICEABLY less- maybe even half of its movement in the horizontal position.
    Is this
    a) normal?
    b) a problem that must be addressed?
    c) something a reasonably-experienced clock repairman like me (I am NOT currently a watch repairman) can do something about?
    d) something I have to live with?
    e) something I have to send to a watch specialist for?
    f) none of the above?
    THANKS VERY MUCH for any assistance you may be able to give!
    Best regards, Jim.

  2. #2
    westminster
    Guest

    Default Chelsea Ship's Clock Question (RE: westminster)

    Hello All! I recently acquired a time-only Chelsea ship's clock which seems to me to have a balance wheel problem.
    THE CLOCK:
    The chrome-plated clock itself is just over 7" diameter with a black face. It swings out from a chrome-plated deck mount to gain access to the winding and setting holes in the back.
    The face is marked:
    MARK I. DECK CLOCK
    U. S. NAVY
    (N) 155 1938
    The chrome-over-brass movement is about 2-3/4" diameter with a (gold?) plated platform escapement.
    THE PROBLEM:
    The clock would only run about 6 days on a full winding. I disassembled everything except the platform escapement for cleaning. After reassembly, I carefully oiled everything. I borrowed watch oil and watch oilng tools to carefully oil the escape wheel pivots. I had no access to the balance wheel pivots (those jewels are sealed), so did not touch them.
    All this seemed to have no real effect on the timekeeping or length of running.
    I THINK the problem lies in the balance wheel- here is what I observed:
    When the clock lies on its back with the movement (and platform escapement) flat, the balance wheel has a good, strong back-and-forth oscillation. When I set the movement upright, the back and forth motion of the balance wheel is NOTICEABLY less- maybe even half of its movement in the horizontal position.
    Is this
    a) normal?
    b) a problem that must be addressed?
    c) something a reasonably-experienced clock repairman like me (I am NOT currently a watch repairman) can do something about?
    d) something I have to live with?
    e) something I have to send to a watch specialist for?
    f) none of the above?
    THANKS VERY MUCH for any assistance you may be able to give!
    Best regards, Jim.

  3. #3

    Default Chelsea Ship's Clock Question (RE: westminster)

    Hello Jim,

    Does it keep ok time for the 6 days?

    I can not address your question about escapement, but I have 2 bulkhead clocks and they will run almost 2 weeks on a winding.

    Could the mainspring be "set" and it is not driving the clock well.

    Andy Dervan

  4. #4
    westminster
    Guest

    Default Chelsea Ship's Clock Question (RE: westminster)

    <BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">n </div></BLOCKQUOTE>
    Thanks for the response Andy.
    Yes it does seem to keep OK time.
    I suppose the mainspring could possibly be a problem, but would that explain why the balance wheel acts so differently in the vertical vs. horizontal position?
    Best regards, Jim.

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