Unusual Moser Baer electric clock - Page 2 - UK Vintage Radio Repair and Restoration Discussion Forum

dhunt52 · 22nd Jul 2015, 11:03 pm

Thank you everyone for all your help.
I think Mike's explanation is most likely correct in that the tension of the wound spring stops the motor and in this case, the spring has snapped somewhere near the long end. That would still allow the clock to keep accurate time.

I had not seen the video before so thank you.
One of the comments is interesting...... please see attached image.
I will need to check the mechanism first ad replace any missing or broken pin.

Thank you everyone.

mark_in_manc · 25th Jul 2015, 8:34 pm

My ITR (IBM) master clock is wound by an electric motor which runs continuously - the idea (as I'm sure you know) being that the small mechanical spring keeps it going for an hour or so in case of a power cut.

My motor rotates constantly - I had assumed it wound through a clutch. It certainly groans, moans and bumps from time to time.

When power is resumed it can bring all the slaves back up to the current time as it logs any stoppage time mechanically and catches up at 1 'click' every 2 secs.

22nd Jul 2015, 11:03 pm	#21
dhunt52 Retired Dormant Member Join Date: Mar 2015 Location: Farnborough, Hampshire, UK. Posts: 11	Re: Unusual Moser Baer electric clock Thank you everyone for all your help. I think Mike's explanation is most likely correct in that the tension of the wound spring stops the motor and in this case, the spring has snapped somewhere near the long end. That would still allow the clock to keep accurate time. I had not seen the video before so thank you. One of the comments is interesting...... please see attached image. I will need to check the mechanism first ad replace any missing or broken pin. Thank you everyone. Attached Thumbnails

25th Jul 2015, 8:34 pm	#22
mark_in_manc Octode Join Date: Nov 2011 Location: Manchester, UK. Posts: 1,874	Re: Unusual Moser Baer electric clock My ITR (IBM) master clock is wound by an electric motor which runs continuously - the idea (as I'm sure you know) being that the small mechanical spring keeps it going for an hour or so in case of a power cut. My motor rotates constantly - I had assumed it wound through a clutch. It certainly groans, moans and bumps from time to time. When power is resumed it can bring all the slaves back up to the current time as it logs any stoppage time mechanically and catches up at 1 'click' every 2 secs.