Very Unusual Japy Freres suspension

[mbegalla]

Just picked up this small unusual Japy movement, It has the most unusual suspension set up I’ve ever seen, has anyone else ran into this? or any comments? I have posted it elsewhere ,and people seem to think it is a silk thread set up, I have owned many silk thread Movements, I don’t think this started out as one, maybe a transition piece? …I feel however it is original, maybe experimental It’s the most unusual suspension set up I’ve ever seen, has anyone else ran into this before?? or any comments I have posted it elsewhere and people seem to think it is silk thread .,,I feel however it is not, as I have owned many silk threat suspensions, The regulating adjustment rod that goes through the movement is pinned on to a brass collet, A very thin soft suspension spring” coils“ around it and goes down through the narrow brass block the only thing missing( I feel) is the blocking pin on the bottom of the spring to hang the pendulum on… it definitely will move up and down when you turn it but I have never seen such a set up and I feel this original any comments or other pictures would be appreciated

 

[wow]

I have not seen this either. If the spring is that thin, it should work. Seems like the spring would eventually break at the connection if adjusted very much but I guess once it is set, there would be no stress on that joint. ?

 

[shutterbug]

It appears to function on the silk thread principal, and is likely a way of setting the timing of the clock. Rather than raising or lowering chops or the bob, it raises and lowers the whole pendulum. Interesting idea.

 

[mbegalla]

I have not seen this either. If the spring is that thin, it should work. Seems like the spring would eventually break at the connection if adjusted very much but I guess once it is set, there would be no stress on that joint. ?

Yes it is very soft and easy to roll up and unroll

 

[JimmyOz]

I have never seen it and it looks like a simple idea compared to other SS on French clocks. Maybe it was just not accurate enough as there would be a bit of movement in the spring given its length and thickness with the temperature fluctuations and therefore abandoned?

 

[mbegalla]

I have never seen it and it looks like a simple idea compared to other SS on French clocks. Maybe it was just not accurate enough as there would be a bit of movement in the spring given its length and thickness with the temperature fluctuations and therefore abandoned?

 

[mbegalla]

I made a bottom for it yesterday attached the pendulum the suspension works quite well, winds up all the way tight and all the way down , actually works quite well

 

[rgmt79]

How is the pendulum attached, can you show a photo?

Richard

 

[Ralph]

I had a clock years ago with a similar suspension. I referred to it as a window shade suspension.. if I remember right, it was signed Henry Marc on the dial.

Ralph

 

[agemo]

The problem with this kind of suspension is that the pendulum should not swing straight to the limit of the twist dance. It is certainly a suspension before the two leaf suspension.

 

[mbegalla]

How is the pendulum attached, can you show a photo?

Richard

I’d imagine there was a brass block with pin( broken off) like you find on standard French suspension springs, I have a few broken ones that I will re purpose the bottom on to this existing spring