gents unipolar slave clock

gents unipolar slave clock

This topic has 9 replies, 5 voices, and was last updated 14 November 2018 at 22:25 by duncan webster 1.

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14 November 2018 at 19:08 #380634
duncan webster 1
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@duncanwebster1
Anyone know how long the pulse should be for one of these? I've got it going with a 240mA pulse 50ms long every 30 sec. It will work on shorter, but it sort of feels better at 50ms. In reality I don't suppose it matters, but it would be nice to know. I've tried Google and got nowhere

Edited By duncan webster on 14/11/2018 19:09:41
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14 November 2018 at 19:08 #31986
duncan webster 1
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@duncanwebster1
14 November 2018 at 19:42 #380638
Martin Connelly
Participant
@martinconnelly55370
Liverpool World Museum has a master and slave clock in their horology section. I don't know the maker but they do have a large background database for the section. They may be able to help. It's also worth a visit if you are ever in the area.

Martin C
14 November 2018 at 20:19 #380639
Brian H
Participant
@brianh50089
The BHI (British Horological Institute) is usually good for clock information, including electric ones.

Well worth a visit one one of their open days to see the original speaking clock (it still works)

Brian
14 November 2018 at 20:25 #380640
Jon Lawes
Participant
@jonlawes51698
This might be useful

**LINK**

The electric clocks website supplies drivers for these clocks (a friend used one on a clock he got from Boscombe Down and asked me to wire it up).
14 November 2018 at 20:28 #380641
Jon Lawes
Participant
@jonlawes51698
The options on the units he sells is 60, 120 or 240 mS
14 November 2018 at 20:46 #380644
duncan webster 1
Participant
@duncanwebster1
Thanks Jon, I'll change it to 60ms.

Martin, I live close to Liverpool, and have stood next to their shortt free pendulum going 'how does that work then?' Next time I'm in L'pool I'll visit again. The new museum on the Albert Dock is not really worth a special trip, apart from a carriage from the Liverpool Overhead Railway and of course Lion from the L&M there is nothing of interest.
14 November 2018 at 21:04 #380647
Jon Lawes
Participant
@jonlawes51698
Glad to help
14 November 2018 at 21:20 #380649
John Haine
Participant
@johnhaine32865
Try The Clockworks – brilliant.
14 November 2018 at 22:25 #380665
duncan webster 1
Participant
@duncanwebster1
Changed to 60ms and it works even better. Less than 3.5 hours since posting the original query and it's sorted. Thanks to all
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