bs22fly
1535
From FPJ
Dear Brad,
The escapement of the Centigraphe beats at 21600 and counts 6 stops per second. If there was nothing else to regulate the speed of the hand, it would look like the movement of a "foudroyante".
Thus, on the axis of the hand there is a 30 teeth wheel which works with a free lever.
This free lever slows down the speed of the axis of the hand 60 times per second; furthermore this axis is slowed down 6 times per second by the escapement of the watch.
The cinema taught us that to have a fluid image, 24 images are enough. There are 60 images/second in the vision of the movement of the hand, it is sufficient to see a fluid flow which we can stop at any moment.
Best regards,
FPJ
Are we going to get some info from FP Journe on the Centigraph at some point?
I completely understand that he has been very busy with the Paris Boutique, but there are a lot of unanswered questions on the exact workings of the Centigraph, and judging from the amount of posts, significant interest in these answers. Journe has positi...
From FPJ
Dear Brad, The escapement of the Centigraphe beats at 21600 and counts 6 stops per second. If there was nothing else to regulate the speed of the hand, it would look like the movement of a "foudroyante". Thus, on the axis of the hand there is a 30 teeth w...
So the smallest unit of discrimination is 1/60th of a second...
not 1/100th of a second. Why should it be called Centigraphe????? And this answer does not confirm or disprove the Centigraphe's ability to be stopped at a particular 1/60th of a second, i.e., if one has a quick enough hand to start-stop the flying hand, ...
Brilliant....
Brilliant explanation. Thanks to Mark for his relentless pursue for an answer which in turns helped us better understand how the centigraphe works, and to Brad for providing us the information from the man himself. On a side note, there is an interested i...
Ohh sounds interesting Aaron
I'v didnt seem to catch brad's post about the 2nd iteration of the Vagabondage, care to show me the lead? Also, what's this about a Chronometre Optimum, sounds like my kinda stuff! I'm not in Singapore now, so can't get the magazine it might be in, so car...
Chronometre Optimum....
Stephen, In the interview, he simply mentioned Chronometre Optimum as one of the upcoming projects in the future. Nothing more I'm afraid. I have came across 'Chronometre Optimum' in a previous interview. I am in the midst of browsing through my stack of ...
An interesting article on Centrigraphe....
An interesting article on Centrigraphe which I have just found.... Here are some of the excerpts (taken from Revolution Issue 11, by Ian Skellern) Power for the chronograph function- "Journe has used a similiar mainspring configuration to the one he inven...
Unfortunately none of these posts really answers the question...
This last one seems to suggest that, while the hand is running, it moves once every 1/16th of a second, but that when the user "stops" the hand, it can measure time in increments between two adjacent 1/16ths of a second. Of course, it cannot literally be ...