Full bridge on American Pocket Watches

Home Forums General Discussion Forum Full bridge on American Pocket Watches

  • This topic is empty.
Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
    Posts
  • #48059
    jayparker
    Participant
    • Topics Started: 1
    • Total Posts: 2

    Hi Bob and to everyone else.
    The whole Course is Brilliant. Thank you Thankyou.
    I have read just about every book on Watchmaking, which i enjoy doing. Bob the content and the layout of your course is perfect.
    There has been plenty of nights when the wife has told me to come to bed because it is the early hours of the morning, but i am still on my computer going on to the next lesson,or revising one i have just finished.
    I am in Sydney Australia,and we do not seem to have the same resources, like the marts you guys have over there, where you can purchase reasonably priced tools or ask someones advice
    Now to my problem.I have collected alot of Pocket Watches over the years, most of them American, and all working. The ones that are not working, all have full bridge plates, if that is the correct term.I do not know where to start in dis-assembling these watches. Everything i have read or been told in regards to learning to repair Pocket watches, all say to start with a three quarter bridge.
    Is there a good book or web page that will help me pull apart these watches?
    Any help or advice would be greatly appreciated.
    Once again Bob, Thank you
    All the best everyone
    Jay

    #50672
    Bob Tascione
    Moderator
    • Topics Started: 38
    • Total Posts: 1552

    Hi Jay and welcome!

    Oooops, I guess I’m not too popular around your house right now! I’ve also pulled all nighters working on watches without realizing how late (or early) it was.
    I’m happy you’re having fun with the course though.

    There are a few differences between the 3/4 and the full plate movements.
    Letting down the mainspring is one. To let down the mainspring you’ll need either a let down key, bench key or the stem and crown from the watch. Any of these will work well. Remove the movement from the case and you should see a small hole along the edge next to the where the winding stem enters. Insert whatever you are using to let down the spring into the winding hole and turn it about half a click and then insert a small pin into the hole and push slightly. This will move the click away from the ratchet which is hidden from view by the plate. You can now release the power by allowing the let down key to turn slowly.
    After all power is let down and hands and dial are removed you can proceed to disassemble the movement by removing the balance cock and balance first. When separating the plates view between them making sure that the pallet fork lifts freely with the back plate and doesn’t get jammed while lifting plate. This can bend or break the pallet fork pivot.

    When reassembling the movement a neat trick is to build the movement “upside down”. I covered this in an earlier post which I’m pasting here for you.

    The full plate watch can be a little tricky when it comes to assembly as compared with 3/4 plate and finger bridged movements. It can be tough getting the pallet fork situated during assembly. One tip on assembling them that works great for me is to assemble the movement “upside down”. There probably isn’t really an upside down so I guess I mean the opposite way that you would assemble a 3/4 plate. By placing the watch on the holder with the balance cock side down (leave the balance cock and balance off at this point) towards the bench surface I find it much easier to build the wheel train and install the pallet in place. You can then place the dial side plate on and line up the arbors by viewing between the plates. Just a tip but it does seem to work well for me

    I hope this helps Jay. Please keep us posted and feel free to ask more questions anytime.

    Bob

    #50673
    jayparker
    Participant
    • Topics Started: 1
    • Total Posts: 2

    Thanks Bob for all your help. I am currently in the middle of winning some bench keys on ebay. Hopefully.
    Bob i was told nearly twenty five ago to become a watchmaker. I wish i had listened.
    I have done nearly every other fiddly job on the planet.I have tied fully dressed salmon flies for a living, which i still do for special orders. For the last 9 years i design/repair/service fishing reels for some of the biggest fishing companies in the world.I love fiddly things and get great satisfaction out of repairing something to make it work again.
    I truly enjoy the look on someones face when i return their reel back to them, which was their Grandfathers, and it is working better than the day they bought it.
    Bob i appreciate your quick reply to my question, and i am sure i will have many more for you.
    Hopefully in the near future, i will enjoy the look on someones face, when i return their Great Grandfathers Elgin etc back to the grandchildren and it is working again.
    Thanks again Bob
    Regards Jay

Viewing 3 posts - 1 through 3 (of 3 total)
  • You must be logged in to reply to this topic.
jayparkerFull bridge on American Pocket Watches