New Haven main spring

[rmeach]

I have run into a new situation with a New Haven clock movement and need help. It comes out of a kitchen clock and looks to be early 1900's. The movement looks fairly standard except the time train main spring fits over a post set about 180 degree away from the post holding the plates togather. This post holding one end of the spring is mounted to one plate only. Can someone tell me how to remove this spring for cleaning? I have not taken the movement apart yet but the post appears to have peened ends.

Any help would be greatly appreciated.

 

[rmeach]

I have run into a new situation with a New Haven clock movement and need help. It comes out of a kitchen clock and looks to be early 1900's. The movement looks fairly standard except the time train main spring fits over a post set about 180 degree away from the post holding the plates togather. This post holding one end of the spring is mounted to one plate only. Can someone tell me how to remove this spring for cleaning? I have not taken the movement apart yet but the post appears to have peened ends.

Any help would be greatly appreciated.

 

[rmeach]

Phil, I appreciate the input. The C type retainer will work to hold the spring, but would you normally expect the spring to slip off the post once the plates are seperated?

I have a lot to learn so I am puzzled as to why this spring is installed this way. Is there any advantage, or just another way to do it?

 

[David B Pendley]

I believe New Haven was trying to get mainspring to open or expand away from movement by placing post this way. On some clocks as time runs down the mainspring expands and actually blocks hour strike hammer lever. I had not yet had any of this movements with a peened post, when the tenison is let off spring the loop of mainspring will slide off...it's tight but will come off. This movement is one where sometimes a hose clamp works well instead of a C ring.

 

[Cactus50]

Hello rmeach
The post for the time mainspring should have a shoulder that prevents the loop end from sliding off the post. The hole in the loop should be slightly larger than the shoulder, so that you can work the spring off without too much trouble.

 

[Don Havens]

Rem,

Just as a note to what the experts have told you:

I have encountered a situation similar to yours where the end of the mainspring was supposed to go on the pillar but had been hooked on this little stub instead. The purpose of the stub was to deflect the spring away from the mechanism as it unwound, but a previous "repairer" apparently became confused and hooked it to the wrong thing.

Just beware and don't mess with it too much before you put the clamp on it and let the spring down. This stub isn't all that long.

Don

 

[Joe Collins]

This subject has been discussed before. Check out the previous post at:
old ref::http://nawcc-mb.infopop.cc/eve/forums/a/tpc/f/5746044581/m/8866073205/r/3936071505#3936071505
I think it will help.

Joe

 

[rmeach]

I appreciate all the input. It gave me the confidence to move on. I have the spring out, and it did just slip over the collar on the end of the post. It just looked like it was peened. It seems I learn something new everytime I open up a clock!

David, I like the idea of using a hose clamp. I had not heard of this before so I'm going to give it a try. Many thanks.

 

[DJDasher]

The use of a hose clamp was one of the best tips that I have gotten from this board. The hold on the spring is the most secure and safe that I have seen. A hose clamp is usually fairly wide adding to the security of the spring. I got the tip from "Phil the Moderator".