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Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
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11th Jul 2018, 10:20 am | #1 |
Retired Dormant Member
Join Date: Jul 2018
Location: Reepham, Norfolk, UK.
Posts: 1
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Electric clock regulating.
Good day all, first time on this web site so a novice.
I have a bakelite cased electric alarm clock that is out of sync, the motor is fine, the second hand sweeps round in exactly one minute but the hour and minute hands are out of sync. I've cleaned the gearing gently with appropriate solvents being careful not to get any on the windings, surprised how intricate the works are, the alarm part of the movement works fine but don't think it would wake anyone up though. Cannot see any obvious faults or problems with the works, any advice would be welcome before i start to dismantle it. Thanks, new Boy. |
11th Jul 2018, 10:24 am | #2 |
Moderator
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 21,288
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Re: Electric clock regulating.
Hello and welcome to the forums.
When you say that the hour and minute hands are out of sync, do you mean that they don't line up at twelve 'o' clock or that they lose or gain time?
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Graham. Forum Moderator Reach for your meter before you reach for your soldering iron. |
11th Jul 2018, 11:04 am | #3 |
Dekatron
Join Date: Jan 2005
Location: Oxford, UK.
Posts: 17,843
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Re: Electric clock regulating.
And could you post some pics of the clock and its movement please.
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12th Jul 2018, 1:57 am | #4 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,711
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Re: Electric clock regulating.
Assuming the amount the hands are "out of sync" is constant, the cure is very simple.
You need to get access to the hands themselves by removing the glass. Set the alarm hand to exactly 6 O'Clock and turn the alarm on. Slowly advance the time setting until you find the point where the alarm starts goes off, if you miss this point don't turn it backwards, go all the way round again. The hands are a friction fit on a concentric spindle, it should be possible to manually move the hour hand to 6 and the minute hand to 12. Don't be too concerned about precisely lining up the second hand relative to the minute hand, as there is typically +/- 15 seconds backlash in the movement.
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