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  1. R

    pendulum swing amplitude question

    The setup is described fully here: A DIY, NON Hipp Toggle master clock. With offset sensor I haven't been able to get it to run reliably below 1" swing. But I've an idea involving placing the sensor centrally which does mean making more electronics to get the drive impulse central. After...
  2. R

    pendulum swing amplitude question

    Thanks Tim and Bruce. It's been a while since I posted here and do remember that TD would have probably been quick to respond on something like this I. hope he is OK. It's the " but it does not come without a cost in other areas" part that I'm keen to hear about.. I do know about the other...
  3. R

    Mixing Synchronome & Gents slave dials

    You could connect a resistor across the coil. The value would depend on how well adjusted the dial mech is. Gents claim (in the online instructions I've read) that they should work reliably down to 0.13 amps. It also says the standard operating current in a Gents loop is 0.22 amps. So if the...
  4. R

    pendulum swing amplitude question

    So nobody has any theories on small or large arcs.. Either you've decided I'm crazy or everyone is a John Harrison devotee :) In filming this short video I've noticed the arc has crept up a little to just over 1" but it shows the sensor and the "count wheel"
  5. R

    Mixing Synchronome & Gents slave dials

    In a series circuit with mixed slaves, specified for a certain working current, it is not necessary to have the same voltage across each device. The Synchronome statement referred to by Toughtool above is not an exact requirement, but an approximate one and so relatively unimportant. Therefore...
  6. R

    pendulum swing amplitude question

    I've built (another) electrically impulsed clock with a 1 sec pendulum. Originally it was a British Post Office clock type 36 and now makes use of the case, the chassis board and drive coil and the Invar pendulum road. The bob ihowever is bigger and heavier - like a Synchronome bob. The pendulum...
  7. R

    Patek Plilippe 1970's electronic master clock. (help!)

    Thanks Chris... Do the controlled clocks also need something special at the top of the hour? Most do. I don't know but quite possibly. The big filter cap is already out, awaiting replacement. At first, the only thing working when first powered up was the oscillator. The Osc. o/p was present on...
  8. R

    Patek Plilippe 1970's electronic master clock. (help!)

    I think I have now solved my own conundrum of the Xtal freq issue after looking at a table of powers of 2 with a tweak of the 17.647Khz crystal freq trimmers, a 30 sec pulse would emerge directly from19 stages of divide by two - 14 in the 4020 and 5 in the 2024 that follows it, neatly avoiding...
  9. R

    Patek Plilippe 1970's electronic master clock. (help!)

    I have a quartz clock as title - Not one of the amazing PP modular stack systems - but a single wall unit which I believe was called the Quartz-M. These must have been marketed by other suppliers as mine is re-badged as "Blick" This link shows an ECS example: ECS - Quartz-M master clock...
  10. R

    Pendulum impulse on Synchronome master clock

    The answer is A .. There is plenty of setup info on the internetnet including somewhere a reprint of the original Synchronome instructions. But this should help: Synchronome Master Clock Set Up (hvtesla.com) Good idea to join a UK Synchronome group ! Roger
  11. R

    Coil rewinding with 3D printing help

    My son assisted me with the job of rewinding a pair of coils by providing bobbins/spools for a slave clock, . In case it's of interest to others the details are here : Configurable spool - 2 part to save printing support (with OpenScad) by rjelbert
  12. R

    Gents Gents c7 suspension spring

    Hi. I just measured mine at .012. for what it's worth..Roger
  13. R

    synchronome clock wiring

    It's worth giving the solution in for future readers of the thread..A normal Syncronome clock system has all elements ie: the resetting electro-magnet and the pilot dial + any other possible dials, in a simple series circuit. Where fitted, the variable resistance in the case is also in the...
  14. R

    Gledhill Brooke time recorder

    It may have originated in a factory near you if you live in an industrial area..Many of these machines were run off electrical master clocks but yours, with a pendulum, is obviously a mechanical one. I've read that the movements of this type is is of fine quality. Sorting out the printer unit...
  15. R

    Pulse clock - unusual design and interface required

    Double stepping was indeed an advantage of reverse polarity dials but in general use they were also known for their silent operation and so were always used, for example, in Radio and TV studios.
  16. R

    Pulse clock - unusual design and interface required

    Ok..that simplifies it a bit..I believe most European clocks ran off 24v - some were one pulse per minute I think. Before the days of solid state electronics, the alternating polarity pulse function was often done with relays (ugh:-() I imagine you would need three and one would need to be wired...
  17. R

    Pulse clock - unusual design and interface required

    Hi..You didn't say if you know whether the slave need alternate seconds or 30 seconds. If you need a pulse every second the simplest way - and the method used by Hope-Jones - is to fit a very small magnet to the rod and a miniature reed relay to the case - placed at BDC. Either way, the rest of...
  18. R

    Steel or Invar pendulum

    I once bought a much neglected Mk2 Synchronome that had plenty of surface rust on the rod....
  19. R

    Swinden and Sons, Birmingham: Skeleton clock.info sought

    I'll be seeing the owner tonight and will pass on the useful comments...especially re the hands..I'm inclined to think that the moon style would look good on it..Thanks again.Roger
  20. R

    Swinden and Sons, Birmingham: Skeleton clock.info sought

    pssibly like this ? (sorry for double image...having trouble managing images !)

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