mkt33
[PuristS]
5252
Some PuristS have been asking to see the new MB R220 for SIHH 2013
Which was developed for the New Rieussec "Rising Hours"
The press release
"This unusual time display is made possible by the new manufacture calibre MB R220, which boasts an elaborate patented mechanism consisting of two rotating discs positioned one atop the other. The Arabic numerals 1 to 12 are cut from the upper disc. This twelve-hour disc turns above the bicolour day/night disc, which is half pastel blue and half black so that a light or dark hue appears in the skeletonised numeral in the window depending on the time of day or night. The twelve-hour disc rotates continually, while the day/night disc turns in intervals and at variable speeds to produce the desired colour change (pale blue for the night, black for the day) in the cut-out numerals. This complex motion is controlled with the aid of a Maltese cross mechanism consisting of two cam-like wheels. One of these cams is mounted on the propelling staff of the day/night disc; the other is affixed to an extension of the hour-staff. Each cam’s profile is specially shaped so that the cams turn idly past one another between 9 a.m. and 3 p.m. (and again between 9 p.m. and 3 a.m.); the day/night disc is accordingly motionless throughout both these intervals. Meshing begins at 3 a.m. (and 3 p.m.). This engagement causes the day/night disc to turn at an increasingly faster pace until two teeth on either side engage in a way that the day/night disc no longer accelerates but instead continues to turn synchronously with the twelve-hour disc – this occurs from 4:30 a.m. to 7:30 a.m. (and from 4:30 p.m. to 7:30 p.m.). Afterwards, the day/night disc decelerates between 7:30 a.m. and 9 a.m. (and between 7:30 p.m. and 9 p.m.) until the meshing is completely separated, whereupon the day/night disc comes to a standstill"
So without further delay (and you all are the first to see this 
)
Here is the new MB R220.
Nothing too new except for the rose gold rotor
But here is the more important dial side "explosion" photo of the Rising Hours dual disk system
Enjoy, Mike
This message has been edited by mkt33 on 2013-01-21 11:50:05
