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Posted

A little more clarity;

Incabloc.pdf

2 hours ago, VWatchie said:

Column 1: Calibres de base = Base calibre

correct

2 hours ago, VWatchie said:

Column 2: Grandeur = Ligne size

Also correct

2 hours ago, VWatchie said:

Column 3: Calibres dérivés = Derived calibres

Right again

2 hours ago, VWatchie said:

Column 4: Ø trou = Hole diameter (I guess, but what hole?)

OD of the hole jewel

2 hours ago, VWatchie said:
  • Column 5: Bloc dessus = Upper shock block (for the balance cock? I’m just guessing)
  • Column 6: Bloc dessous = Lower shock block (in the main plate? I’m just guessing)

Right on both counts

2 hours ago, VWatchie said:
  • Column 7: Creusure plat. = Recess ??? (I have no idea!?)
  • Column 8: Creusure cad. = Recess ??? (I have no idea!?)

Here you've got me

2 hours ago, VWatchie said:

Column 9: Clavette = (I have no idea!?)

This is the little "U" shaped clip that holds the bloc into the main plate or balance cock on the balance side in thos settings that aren't a friction fit.

2 hours ago, VWatchie said:

Column 10: Vis = (Means “screw” in French but again, I have no idea?)

This is indeed a screw for those settings where the bloc is secured in place with a screw instead of a Clavette

2 hours ago, VWatchie said:

Column 11: Chaton empierré = (Google translates this to “stoned kitten”. Jewel housing, no?)

pivot hole jewel, although I much prefer the stoned feline

2 hours ago, VWatchie said:
  • Column 12: Pirre de dessus = (Google translates this to “Stone from above”. Could it be the balance cap jewel on the balance cock side?)
  • Column 13: c. pivot dessous = (Something a about "Pivot underneath". Could it be the balance cap jewel on the main plate side?)

This actually reads "Pierre de Contre Pivot" "dessus" "dessous" and is the cap jewel upper and lower. This is important as often the lower cap jewels are thinner than the upper ones.

2 hours ago, VWatchie said:
  • Column 14: Ressort de dessus = (I guess this could be the anti-shock spring for the shock block in the balance bridge?)
  • Column 15: c. pivot dessous = (Well, if the previous is an anti-shock spring then this would be the anti-shock spring for the shock block in main plate?)

As above this should read "Ressort de Contre pivot" "dessus" "dessous" and refers to the lyre springs or cap jewel springs. Contre pivot = end stone or cap jewel. Where different thicknesses of cap jewels are used top and bottom you will need different springs to accomodate their different dimensions.

If anyone can fill in collumns 7 & 8 we will have the full picture, although I believe that they refer to dimensions not part numbers.

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  • 5 years later...
Posted
On 11/2/2019 at 3:42 PM, Marc said:

If anyone can fill in collumns 7 & 8 we will have the full picture, although I believe that they refer to dimensions not part numbers.

This has been bugging me for a while now, so I went down a bit of a rabbit hole trying to figure out the meaning of "Creusure plat." and "Creusure cad.".

TL;DR creusure plat. is the cutout in the roller, creusure cad. is the cutout in the dial (depth, in 1/100 mm)

Firstly, "creusure" literally means a cavity, hollow, depression, excavation, etc. In horology it refers to a flat-bottomed hole in a plate that is usually wider than it is deep. A creusure could be used to accommodate the barrel, the minute wheel, a dial foot, a locating post, etc. See Jean-Baptiste Le Roy's entry in the 1751 Encyclopedia, or Reasoned Dictionary of Sciences, Arts and Trades (Encyclopédie, ou, Dictionnaire raisonné des sciences, des arts et des métiers):

Creusure.jpeg.a905b6fed92286548614b5f0cbcb069c.jpeg

CREUSURE, s. f. (Horlogerie.) nom que les Horlogers & d'autres ouvriers donnent en général à des cavités, mais sur-tout à celles qui sont un peu grandes, & dont le fonds est plat ; tel est dans une montre simple celle de la platine des piliers du côté du cadran, & qui sert à contenir les roües de la cadrature, la barrette, &c. Les creusures servent en général dans les montres à contenir des roües, qui par la disposition du calibre, ne pourraient pas se trouver au-dessus du plan des platines. Voyez PLATINE, &c.

Quote

CREUSURE, s. f. (Watchmaking.) name given by watchmakers and other craftsmen to cavities, especially those that are a little large and have a flat bottom; in a simple watch, this is the one on the main plate on the dial side, which is used to contain the wheels of the dial, the barrel, etc. The cavities are generally used in watches to contain the wheels which, by the layout of the caliber, could not be located above the plane of the main plates. See PLATE, &c.

In the context of Incabloc, "plat." is short for "plateau" (roller), and "cad." is short for "cadran" (dial). So creusure plateau is the depth of the recess (in hundredths of a millimetre) that must be cut into the bottom of the roller to accommodate the lower shock block where it protrudes through the main plate. Similarly, creusure cadran is the depth of the recess that must be milled into the underside of the dial itself to accommodate the lower shock block when it sits proud of the dial side of the main plate.

Here are a couple photos of an Omega 661 that I'm working on which has both cutouts.

Creusureplateau.thumb.jpg.4b705a621b5828a46a9c9e33a1b0d345.jpg

Creusurecadran.thumb.jpg.bcca7c97e1d85ee9ef0acfc4f300b10b.jpg

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