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  1. #1

    Default Gillett & Johnston Master Not Running

    Hello all. I'm new to this, but I have a Synchronome master clock which doesn't run. I've done all I can find from the internet but I'm still stuck - after about 20 minutes the pendulum doesn't swing far enough to rotate the main wheel. Surely if there's enough power to lift the arm, then it should sustain?

    Perhaps someone can view the attached slo-mo and tell me what's wrong?

    Thank you for any and all help!

  2. #2
    Forums Administrator harold bain's Avatar
    Join Date
    Nov 2002
    Whitby, Ontario, Canada

    Default Re: British Synchronome 1950s not sustaining (By: Benet)

    Looks like you have an old screwdriver stuck in there....
    harold bain, Member ch 33
    "If it won't "tick",
    let me "tock" to it"

  3. #3
    Registered user.
    Join Date
    Oct 2010
    Calif. USA

    Default Re: British Synchronome 1950s not sustaining (By: harold bain)

    It looks like the contacts might be too close. You are not getting enough
    impulse before it resets.
    Almost all of the other running ones I see on youtube have the roller
    wheel almost at the end of the slope before energizing the solenoid.
    Yours is getting energized at about 1/3 of the slope.
    I suspect it is a little too soon.
    Tinker Dwight
    Last edited by Tinker Dwight; 01-22-2017 at 03:30 PM.

  4. #4

    Default Re: British Synchronome 1950s not sustaining (By: Benet)

    Benet....I can't claim to be an expert on Synchronome but I am an enthusiast with five of my own. In additional I have the Miles book on the history of Synchronomes .
    Your clock does not look like any Synchronome I've ever come across and it would be of great interest to see more images of it and to hear why you believe it to be a Synchronome...here is a link to a YouTube video of the mechanism that is basically similar to all Synchronomes from 1910 to 1980 approx .


  5. #5

    Default Not-a-Synchronome! (By: rogerj)

    Thank you for your replies. Indeed, rogerj, it does seem to be not-a-synchronome, and I'm trying to find out what it is by trawling images on the internet, since it has no markings except 'Made in England' and a number like 3.14159 (not exactly that one, but 3.something) punched into the rear of the clock.

    So, does anyone have any ideas?

  6. #6
    Registered user.
    Join Date
    Nov 2014
    Lincolnshire, UK

    Default Re: Not-a-Synchronome! (By: Benet)

    Could you please post some photographs. Overall views and details too?

  7. #7

    Default Re: Not-a-Synchronome! (By: Snapper)

    Your clock is interesting because it looks Synchronomesque...The count wheel has the the wire actuator and there looks to be an interpretation of the N,R,A arrangement at top left. The "chassis" on which it's built looks like it might be a modified Synchronome one..There are other similarities..we must see it !!
    As Tinker says, the reset is happening too soon. Are the contacts under that NRA plate at top left ?...And as Snapper says...more pictures please ...Roger

  8. #8

    Default Mystery not-a-Synchronome! (By: rogerj)

    Pictures attached as requested. Of course, I'd still appreciate ideas on how to make it run...

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  9. #9

    Default Re: Mystery not-a-Synchronome! (By: Benet)

    I've identified your clock as a Gillet and Johnson. But it appears to have been fitted with a Synchronome dial..
    This should help your further internet searches : http://www.mridout.force9.co.uk/GJ/index.htm.
    I do not know this make but you need to find the contact that closes when the weighted arm begins to fall. Possibly that horizontal piece above the arm. There may be a screw adjustment.
    You could try posting again with a new title relating to the G&J..

  10. #10

    Default Re: Mystery not-a-Synchronome! (By: rogerj)

    Further thoughts....you could email Martin Ridout as he gives his email address on his homepage and seems to invite correspondence : http://www.mridout.force9.co.uk/ He might have found instructions for setting up the G&J master clock..Also..This type of master clock, with very heavy pendulum bobs, were never intended to be free standing as yours seems to be. There are two screw holes at the top of the case (either side of the pendulum support bracket) where it is intended to be securely screwed to a masonry wall. Some believe that even fixing to a stud wall is enough to cause troubles, but free-standing may be part of the reason why yours stops.
    You seem to have a very nice collectable clock...take care...it can become addictive.. :-) Roger

  11. #11

    Default Gillett & Johnston Master Not Running (By: Benet)

    Thank you for all your help Roger. I will action this on Saturday, with any luck, and email Martin Ridout as you suggest.

    This thread carried over from http://mb.nawcc.org/showthread.php?1...not-sustaining where descriptions and pictures of my mysterious clock can be seen!
    Thank you
    Last edited by harold bain; 01-26-2017 at 08:28 AM. Reason: typo

  12. #12

    Default Re: Gillett & Johnston Master Not Running (By: Benet)

    Good luck with the search..In some searching I did I discovered that Synchronome bought out the clock section of G&J in 1958..As many of these clock systems were originally maintained by company engineers it is not surprising that the dial unit was replaced with a Synchronome one. It's probably pertinent that your dial is not marked "Synchronome Electric" as most were when fitted to Synchronome clocks.
    I note that G&J still exists: maybe an email to them might secure a setup .pdf ! http://www.gillettjohnston.co.uk/
    In my earlier post I mis-spelt "JOHNSTON"...sorry..
    Last edited by harold bain; 01-26-2017 at 08:29 AM. Reason: spelling

  13. #13

    Default Re: Gillett & Johnston Master Not Running (By: Benet)

    Hello mods. Please can you rename this thread once more to correct the spelling? It should read "Gillett & Johnston" which would help people searching.. Thank you!
    Last edited by harold bain; 01-26-2017 at 08:27 AM.

  14. #14
    Registered user.
    Join Date
    Oct 2010
    Calif. USA

    Default Re: Gillett & Johnston Master Not Running (By: Benet)

    Have you found the adjustment of the electrical points yet?
    Tinker Dwight

  15. #15

    Default Re: Gillett & Johnston Master Not Running (By: Tinker Dwight)

    Hello Tinker. Yes, I found that adjustment - a screw on the underside of the gravity arm, and tightened it by 3/4 turn to give a longer fall before it resets. I could go further with this one. Thanks for your help!

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