gerry madden | 18/07/2023 18:53:05 |
331 forum posts 156 photos | I have found the coil in this 1960 mains electric clock to have gone o/c. (It was working fine when it was last used in 1995 and I was looking forward to using it again in my new workshop. Typical!) I did wonder about attempting to re-wind the coil myself but the wire is so fine I can hardly see it, never mind feel it. So I think such an attempt would be a disaster. (I have measured the wire to be around 0.065mm diameter) So I'm just wondering now if anyone knows of a source for a replacement ? The coil is approx. 30mmL x 17mmOD x 1/4"(square) I imagine (and I may be totally wrong !) that the electrical characteristics are not too critical just as long as doesn't draw too much current.) Please let me know if the coil laminations and rotor need to be closely matched in order to function. If so, I might need to think about a quartz movement but that's just MORE batteries and therefore doesn't appeal so much. Gerry |
Journeyman | 18/07/2023 19:25:53 |
![]() 1257 forum posts 264 photos | Probably cheaper, safer and quicker to buy a quartz battery movement (available everywhere) and fit to the face with a suitable adaptor. Similarly fitting the hands to the movement. Will look the same and likely just as accurate. John |
Michael Gilligan | 18/07/2023 19:30:42 |
![]() 23121 forum posts 1360 photos | I was about to suggest Cousins … but their range of synchronous movements is discontinued You may however find some information of interest on this page: **LINK** https://www.cousinsuk.com/document/category/movements-mains-synchronous [ sorry, I haven’t looked at anything more than the titles] MichaelG. |
Ady1 | 18/07/2023 19:41:36 |
![]() 6137 forum posts 893 photos | Even if you got it fixed it would probably make scary buzzy electrical noises |
Mike Poole | 18/07/2023 20:58:15 |
![]() 3676 forum posts 82 photos | Posted by gerry madden on 18/07/2023 18:53:05:
I have found the coil in this 1960 mains electric clock to have gone o/c. (It was working fine when it was last used in 1995 and I was looking forward to using it again in my new workshop. Typical!) I did wonder about attempting to re-wind the coil myself but the wire is so fine I can hardly see it, never mind feel it. So I think such an attempt would be a disaster. (I have measured the wire to be around 0.065mm diameter) If you do decide to wind coil then make sure you remove the wire coating before measuring, an easy way is just heat it in a flame and burn it off. Mike |
Peter Bell | 18/07/2023 21:33:54 |
399 forum posts 167 photos | Gerry, You could rewind it so that it works on a lower voltage and use a suitable low voltage mains transformer (bell transformer) to power it. I've done that a few times to avoid using a quartz movement. This link give info https://sound-au.com/clocks/ocm.html Peter |
gerry madden | 18/07/2023 22:53:05 |
331 forum posts 156 photos | Thanks for the good leads ! Mike - I'm glad you said that about the coating. In the past I have tended to remove the enamel by gripping it between fine emery paper. I had a feeling this particular wire wouldn't be strong enough for this technique and when I tried it on a short sample, it proved it ! A flame, ....excellent. Gerry |
Georgineer | 18/07/2023 23:14:05 |
652 forum posts 33 photos | Given that there is most probably only one break in the winding, and that it's most likely on the exposed parts of the coil, the first thing I would do is give it a good coat of looking at under a magnifying glass. If you can identify the break it should be fairly straightforward, if a bit fiddly, to effect a reapir. You can spare a turn or two in order to give enough length to play with, and the soldered repair doesn't need to be particularly elegant, though it's a good idea to slip something insulating under the join to isolate it.. It has worked for me in the past. As far as I can tell from the photo the yellow stuff is nasty gloop from the sort of sticky tape they used in the sixties, and it doesn't look as though there is widespread corrosion, which is the real killer. George |
old mart | 19/07/2023 20:23:17 |
4655 forum posts 304 photos | With a clock that size, you could use a quartz movement powered by a larger cell than an AA type, and it would run for several years. |
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