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Retrograde Posting
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Any typos are due to direct translation
of the original French.
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I can thanks to house AGENHOR make you a
small explanation of retrograde posting and more
particularly, retrograde posting of the seconds.
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The additional plate.
One can see the "snail of the seconds" and the
nozzle of the retrograde rocker which comes to be posed on
its circumference.
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With the opposite of the snail the rocker
has a toothed segment which engraine with the pinion of the
posting of the seconds.
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The position 0 seconds, the nozzle is on
the low part of the snail.
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The position 8 seconds
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One continues: -) the position 16
seconds, the nozzle continues to go up on the snail.
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The position 24 seconds
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The position 30 seconds, the nozzle is on
the edge of the snail and will fall on the low part.
With the assistance of spiral the needle will go back to zero.
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The new version of the mechanism. The
spiral one was removed and replaced by a split spring of some
hundredths.
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| The posting of the seconds
presented is on a sector, it exists also a posting on three 20
second old sectors. This kind of posting is also to indicate
the day of the month, days etc.... |
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