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Strange Jewel Gauge


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52 minutes ago, jdrichard said:

Just bought this tool and am wondering how to use it. Says it’s a Elgin National Jewel Pin Gauge…but not sure how it would be used to measure the jewel diameters or the hole size.

IMG_6449.jpeg

IMG_6448.jpeg

Can you give an idea of scale please JD.  I wondering if this is only part of the gauge.

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Maybe it should come with a tapered pin. The jewel hole is slid down the pin until it comes to a stop, then placed beside the rule to get the corresponding hole size.

If that's the case, then JD, will have to turn a wire to the correct taper in order to use the gauge.

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Is the graduated part of the gauge tapered?

I'm wondering if you slide it between the fork horns of your pallet fork (with safety pin removed) to measure the gap and determine what size impulse jewel (or pin) you should use.

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1 minute ago, Marc said:

(with safety pin removed)

you wouldn't want to do that it's a pain to put those back where you found them.

Then the annoyance is I've seen the tool before and I see how it's used just can't quite remember and definitely don't remember where I saw it being used

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    • I think what peter means oh is once he has fitted the hands and  checked for  alignment if them and that they dont foul, how does he then hold the movement to remove the stem in order to case up. The dial cannot be laid on a cushion or in a movement holder as the hands will get damaged. This can be quite tricky for a beginner, what i do is  to stand the movement on edge on a rubber pad so it doesn't slip. Hold the top edge with one finger then my dominant hand uses 3 fingers to press the stem release and flick out the stem. See below peter, leave off the second hand as this is the longest and gets caught the most, then fit it once the stem is out. Alternatively place the movement in one of the cup style holders, i imagine this is what they are designed for. They only touch the very edge of the dial.  
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