Terminology: Need help!

Internet Horology Club 185

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https://ihc185.infopop.cc/eve/forums/a/tpc/f/9886029761/m/1803945277

June 07, 2012, 01:34

Reuven Gruber

Terminology: Need help!

We have an Arbor whose reduced diameter end sections are called pivots. We attach to the arbor a large gear called a wheel and a small gear called a pinion [Correct so far?]
What is the whole assembly called?

June 21, 2012, 15:42

Peter Drago

I don't think there is a specific name for the assembly but ,in the case of watches, they are simply called "wheels".

June 22, 2012, 18:05

Bill Carlson

All I have ever heard them referred to as 1 wheel, second wheel and so on up the line on the chime train or time side.

Interesting question though!!

June 23, 2012, 10:04

Michael Riska

Me too. All I've ever heard is "The pivot on the second wheel arbor needs polishing" etc.. I've never considered a name for the whole assembly

June 23, 2012, 12:38

Lindell V. Riddle

Reuven,

I would likely call the assembly a "gear train" or simply "train" in fact on a watch the plate over this assembly goes by the "train bridge" title so should think that follows.

Lindell

June 23, 2012, 13:27

Michael Riska

I'm not sure Lindell, I always thought the assembly of All the wheels and arbors would constitute the "train".

June 23, 2012, 14:44

Lindell V. Riddle

You are right Michael, it looks like I should have read Reuven's question more carefully!

So now, let's see if I get it this time, the correct term for what Reuven is asking may simply be "center wheel and pinion" then "third wheel and pinion" and so on. The time train which transmits torque to the escape wheel consists of a four-wheel multiplying train made up of barrel, center wheel and pinion, third wheel and pinion, fourth wheel and pinion then the escape wheel. When all that goes together it then becomes the "gear train" which is what I originally thought Reuven was asking about.

See what you think.

Lindell