Jump to content

Enfield autocorrect chime problem


Rixy

Recommended Posts

An Enfield Westminster clock I was working on (thanks for the advice on the bezel catch, OH, I got that sorted) has now developed a problem with the autocorrect function on the chimes. It was working fine and then I took the clock apart to rectify a pivot problem in the time train (it had been bent when I was putting it in) and when I had it all reassembled it chimed fine but would not self-correct if necessary. 

What seems to happen is once the 3/4 chime is over, both the normal locking lever and the one for auto correct slot into place (so far so good). Moving the hand round to the o'clock, the chimes are triggered, no matter whether it is the long 'arm' or one of the three short ones lifting the flirt. I have tried adjusting the chime lock lever but too high and the chiming never stops and too low there is not enough clearance for the chimes to start. I can set it 'just right' but the autocorrect refuses to do it's thing!

I wondered if I had inadvertently twisted one of the levers but they look alright. They are a broad U shape - common feature on Enfields I think.

Have added some photos if that20231019_201850.thumb.jpg.13cab216d7b7dd4c677a70fda9d9eadc.jpg helps.

This has been driving me crazy for two days. Any suggestions?20231019_201743.thumb.jpg.4b7f6814a7c8d51bc57808155048fb6c.jpg20231019_201944.thumb.jpg.710c3d5afbada45a4f1d238dc72d3541.jpg

Link to comment
Share on other sites

3 minutes ago, Rixy said:

An Enfield Westminster clock I was working on (thanks for the advice on the bezel catch, OH, I got that sorted) has now developed a problem with the autocorrect function on the chimes. It was working fine and then I took the clock apart to rectify a pivot problem in the time train (it had been bent when I was putting it in) and when I had it all reassembled it chimed fine but would not self-correct if necessary. 

What seems to happen is once the 3/4 chime is over, both the normal locking lever and the one for auto correct slot into place (so far so good). Moving the hand round to the o'clock, the chimes are triggered, no matter whether it is the long 'arm' or one of the three short ones lifting the flirt. I have tried adjusting the chime lock lever but too high and the chiming never stops and too low there is not enough clearance for the chimes to start. I can set it 'just right' but the autocorrect refuses to do it's thing!

I wondered if I had inadvertently twisted one of the levers but they look alright. They are a broad U shape - common feature on Enfields I think.

Have added some photos if that20231019_201850.thumb.jpg.13cab216d7b7dd4c677a70fda9d9eadc.jpg helps.

This has been driving me crazy for two days. Any suggestions?20231019_201743.thumb.jpg.4b7f6814a7c8d51bc57808155048fb6c.jpg20231019_201944.thumb.jpg.710c3d5afbada45a4f1d238dc72d3541.jpg

I'm pretty sure @oldhippywould have a suggestion for you on how to alleviate this problem

Link to comment
Share on other sites

My advice is to go back to the beginning. So remove all the chime from the front, Move the hand from its center and each quarter the chime should do 1 cycle. If that is right put the cam wheel on so the next will be quarter past, if all is well do the next and the next and then the hour. Try that and then get back to me.  

  • Thanks 1
Link to comment
Share on other sites

The good news is I went right back, reassembled it bit by bit, checked it at each stage and the autocorrect worked as it should! Not sure what was causing the problem but your advice certainly did the trick. Thanks. 

The bad news is what I thought was a bent pivot due to my clumsy attempt at reassembly, was actually a bent pivot due to a worn bushing in the time train. This means that as soon as I straightened out the pivot and reassembled (very carefully) the movement, the arbor pivot for the third wheel in the time train moved and the clock stopped. It runs for a few minutes then grinds to a halt. I checked that it was in beat and that the back cock wasn't too low. The wear on the bushing isn't massive but is noticeable on close inspection. 

I have attached photos so you can see the pivot in the bushing (not brilliant images). It's wearing upwards.

To rebush, will I need to prepare the hole by hand? I still have a clock from a few weeks ago requiring rebushing so perhaps now is as good a time as any to get started.

20231022_170505.jpg

20231022_170524.jpg

Link to comment
Share on other sites

It certainly needs re-bushing you can do this by hand. The reason it is pushing up is the power on the spring pushes all the wheels up. I did all my bushing by hand but I also made bushes. I never had a bushing tool they are a waste of money.   

  • Like 1
  • Thanks 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • I existed before the term mechatronics engineer existed. I had to combine electricity, electronics, pneumatics, hydraulics and computing just to keep my own equipment working. I have never sub contracted any of my own repairs to the suppliers because I know I could do a better job. For a long time, dental suppliers in my country would bring their dead equipment to me that their own engineers cannot handle. I have accidentally embarrassed a couple of hospital heads of engineering by demonstrating their inadequacy.  I think mechatronics is the most under-appreciated, under valued of all the engineering sciences. I had a part-time dental assistant about 25 years ago, who was studying mechatronics in the polytechnic. She was absolutely clueless about the job prospects for a mechatronics engineer. I asked her about her aspirations and she replied that she really wanted to work in the games industry.  In our dental profession, equipment have evolved from simple mechanical to electro-mechanical to logic-driven electro-mechanical and currently to computer driven machines.  The medical equipment suppliers who employ mechanical engineers and/or mechanical engineers cannot cope with the repairs of the newer equipment. And many times end up changing whole modules and whole machines just because they cannot repair them. But I think HR is afraid to employ a mechatronics engineer just because they don't know what a mechatronics engineer does. Mechatronics is much more fun. It combines almost all of the engineering sciences and produces an all-rounded engineer. But until HR changes their mindset, not all door will be open.
    • Welcome Tarheel, there is a lot of help on this forum...
    • Hello and welcome to the forum.    Enjoy
    • Hello and welcome from Leeds, England. 
    • I can't find anything similar either.  All the writing on the case was a form of advertising, stem set, Swiss lever etc usually found on older watches.
×
×
  • Create New...