Strike Begins Before Westminster Chime Ends

[AllThumbz]

Help!!

I have a Junghans Super 10 Westminster Chime Mantle Clock.

All of a sudden, before the full Westminster Chime on the hour ends, the Strike begins and continues to sound simultaneously with the chime.

Why is this happening, and what corrective measures are appropriate?

Thanks.

Thumbz

[harold bain]

Thumbz, look for the strike warning pin not catching when it goes into warning for the strike. Likely one of the levers needs a slight tweak

[chimeclockfan]

Check the chime cam at the front of the mechanism.

[Willie X]

Thumbz,

Study the long lever that extends over from the chime side to the strike side. Something is allowing that lever to drop prematurely. The lifting pin could be bent or the warning lever may not be lifting quite high enough to hold the warning wheel stationary untill the lever drops. If the lever is dropping prematurely look at the pin that raises it back over near the chime sequence cam. If you watch the mech closely as it functions I believe the malfunction will become evident.

If it is just staring to strike as the last note is being sounded it may be as simple as the chime ratio gear having slipped back a bit on it's shaft but this will only make a difference of a second, or two at most.

Good luck, Willie X

[AllThumbz]

Thumbz,

Study the long lever that extends over from the chime side to the strike side. Something is allowing that lever to drop prematurely. The lifting pin could be bent or the warning lever may not be lifting quite high enough to hold the warning wheel stationary untill the lever drops. If the lever is dropping prematurely look at the pin that raises it back over near the chime sequence cam. If you watch the mech closely as it functions I believe the malfunction will become evident.

If it is just staring to strike as the last note is being sounded it may be as simple as the chime ratio gear having slipped back a bit on it's shaft but this will only make a difference of a second, or two at most.

Good luck, Willie X

Harold, Willie and CCF,

Thank you for your good advice. I will check each of these things and try to get this clock back in synch.

Thumbz

[shutterbug]

Harold, Willie and CCF,

Thank you for your good advice. I will check each of these things and try to get this clock back in synch.

Thumbz

Thumbz - be sure to let us know which advise was right. I'm thinking Harold will win, but curious minds want to know

[AllThumbz]

Harold, Willie and CCF,

Thank you for your good advice. I will check each of these things and try to get this clock back in synch.

Thumbz

Thumbz - be sure to let us know which advise was right. I'm thinking Harold will win, but curious minds want to know

Shutter:

I am going to set it up on the dining room table tonight and take a look at it (my wife hates when I do that but Im too lazy to head down to my work table in the basement). I will take some digital pix of what it looks like and any corrective action I am able to take. This will be a goodlearning experience for me.

Thumbz

[AllThumbz]

Harold, Willie and CCF,

Thank you for your good advice. I will check each of these things and try to get this clock back in synch.

Thumbz

Thumbz - be sure to let us know which advise was right. I'm thinking Harold will win, but curious minds want to know

Shutter:

I am going to set it up on the dining room table tonight and take a look at it (my wife hates when I do that but Im too lazy to head down to my work table in the basement). I will take some digital pix of what it looks like and any corrective action I am able to take. This will be a goodlearning experience for me.

Thumbz

Here is the answer. I don't know proper terminology, so I took before and after photos. There is a staple-shaped wire that holds the strike wheel in place while the chimes are going which is activated by a long wire piece on the chime side. This staple shaped wire acts as a catch for a pin on the strike wheel and keeps it from striking while the chime is sounding. When the chime sounds, the long pin on the chime side pushes a lever up which drops the staple shaped pin down and makes it stop the strike wheel. That staple-shaped wire was bent out of shape so that it wasnt stopping the strike. I adjusted that wire and the long wire pin on the chime side so that the strike was held up until the chime finished.

[harold bain]

That should do it, Thumbz.

[al_taka]

I found your thread on the Junghans repair. Interesting movement and lots of levers and wires. Good excercise in patience.

I'm still wondering what holds your strike activation wire in place on the right side in the shaft with a hole in it. Let me know when you have a minute.

Good job on the clock!

Al T.

[Mike Phelan]

As Harold correctly said.
The 'staple' is the strike warning detent and the wheel with the pin is the strike warning wheel.

CCF
Chime cam - do you mean the star wheel on the cannon pinion?
It won't be that as the striking goes into warning by the count wheel on the chime being lifted during the chime, and, clearly here the striking is starting to run instead of being locked by its warning pin.

AT
Very nice neat clock and typical Junghans who always had to be different! Good job.

[AllThumbz]

I found your thread on the Junghans repair. Interesting movement and lots of levers and wires. Good excercise in patience.

I'm still wondering what holds your strike activation wire in place on the right side in the shaft with a hole in it. Let me know when you have a minute.

Good job on the clock!

Al T.

Al,

It's a force fit into the hole in the arbor- nothing else is holding it. They bent the end of the long activation wire down a bit at the end. It is wedged in there tight! Hope this helps.


Thumbz

[AllThumbz]

As Harold correctly said.
The 'staple' is the strike warning detent and the wheel with the pin is the strike warning wheel.

CCF
Chime cam - do you mean the star wheel on the cannon pinion?
It won't be that as the striking goes into warning by the count wheel on the chime being lifted during the chime, and, clearly here the striking is starting to run instead of being locked by its warning pin.

AT
Very nice neat clock and typical Junghans who always had to be different! Good job.

This was a great learning experience for me, and I hope the thread and pictures can help someone else.

The clock is working perfectly now, thanks to the good advice I received here. Thanks to all!

Thumbz

[al_taka]

I found your thread on the Junghans repair. Interesting movement and lots of levers and wires. Good excercise in patience.

I'm still wondering what holds your strike activation wire in place on the right side in the shaft with a hole in it. Let me know when you have a minute.

Good job on the clock!

Al T.

Al,

It's a force fit into the hole in the arbor- nothing else is holding it. They bent the end of the long activation wire down a bit at the end. It is wedged in there tight! Hope this helps.


Thumbz

Only a force fit? I would not have guessed that. I think Junghans cut a corner with that fastening method. But its original and correct.
Thanks for the explaination.

Al T.