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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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Old 16th Sep 2022, 10:20 am   #1
Jockmacrea
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Join Date: Sep 2022
Location: Denholm, Scotland, UK.
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Default Vintage Clock Bobbin rewind

Where can I get my bobbins rewound for my old clock. Mains powered synchronous 240vac. What approx cost ?
Can anyone Identify the clock please. It is devoid of all markings and numbers, has a cat aluminum enclosure and a 7" face all encased in solid brass . Thanks for looking.
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Old 16th Sep 2022, 11:24 am   #2
Nickthedentist
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Default Re: Vintage Clock Bobbin rewind

Hello and welcome.

What an unusual clock. I would have guessed that it was a slave clock at first glance. I don't recognise the movement. It certainly looks very early.

Any chance of some better pics (perhaps taken outside and uploaded in higher resolution)?

Send a Private Message to forum members Ed Dinning and Murphymad, as they're the experts in coil re-winding.

https://www.vintage-radio.net/forum/...do=newpm&u=215

https://www.vintage-radio.net/forum/...do=newpm&u=511

Nick.
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Old 16th Sep 2022, 11:37 am   #3
Jockmacrea
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Default Re: Vintage Clock Bobbin rewind

Thank you, Nick, I'll try getting some higher res pics and upload them.


George
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Old 16th Sep 2022, 4:20 pm   #4
Tantanometer
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Default Re: Vintage Clock Bobbin rewind

Hello George,

Have a read of this excellent article https://sound-au.com/clocks/ocm.html.

Basically, what he suggests is rewinding the bobbin for a lower voltage using much thicker wire. I used this method to repair a 1930s Hammond electric clock movement and it's still going 8 years later. I made a new bobbin from cardboard, used epoxy resin to strengthen it and then filled it with 0.315mm (30SWG) enamelled copper wire which is substantial enough to wind by hand. As predicted in the article the motor ran at about 15V AC and is now fed from an old "wall wart" transformer making it considerably safer than the original design.

Have a go there's nothing to lose.

Len
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Old 20th Sep 2022, 7:36 pm   #5
Robsradio
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Default Re: Vintage Clock Bobbin rewind

That is almost certainly a slave clock, please donít connect it to the mains. That is maybe why it needs a rewind as somebody may have put the mains on it in the past by mistake. Itís an unusual movement that Iíve not seen before.
You will need a master clock to drive it or a slave impulse device. It would be good if you could fit the minute hand and toggle the mechanism and see what time interval it advances by it will be either 1/2 min or 1 min, it looks like 1 min from the photo, with a rocking Ďleverí advancing 1 min in each direction of the Ďleverí.
Enjoy
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