Jack Forster
[Elite User]
4381
Really interesting thank you. . .
. . .never seen that type of gearing diagram before but it makes the power flow through the train and the difference between a Bonniksen karrusel and a conventional tourbillon immediately obvious, I wonder if movement designers ever use such diagrams.
Jack
PuristSPro goes all academic
Famous last words: "The difference between a tourbillon and a karrusel resides in the speed,with which, the cage rotates and the position of the balance. When the cage makes one revolution per minute and the balance is mounted coaxially with the cage - it...
OK I'll bite. . .
. . . as I recall past threads on the subject- Carriage speed doesn't define a tourbillon per se, IIRC (i.e. there are 12 second tourbillons et cetera). Tourbillon is defined by the presence of an escapement and balance rotating around a fixed fourth whee...
i agree with Jack. as far as i know.. 52 1/2 mins for a single rotation is the common..
it is slow, thats why it result in not as appealing as a tourbillion. And some believed that it does not produce as much stress compared to a tourbillion XY
Believe you are right. . .
. . . although again IIRC there were karrusels made with faster rotating platforms. . . I'd have to hit the books . Jack
See? I could count on Jack
to talk about things I have no ken aboot........... So, is THAT definition of 'tourbillon' ...generally acceptable, because that is what they are teaching in the official WOSTEP textbook? ooooo.....I love controversy! MTF
LOL, well maybe John can weigh in on the WOSTEP definition but. . . .
AFAIK (again this is just from memory of archived threads on Watchrap) the WOSTEP definition specifies a fixed fourth wheel; I don't recall whether or not it also specifies that the balance has to be co-axial with the fourth wheel (though of course that i...
I like the picture....what is it..??
I'll let the gentlemen discuss the fascinating topic of this thread - but can I jump in and ask what the stunning picture is..?? I've never seen anything like it before and I'm blown away..!! I really must do some more research on clocks.....even better i...
Jean Kazes
That was a sculptural clock by Jean Kazes (AHCI Member) made for Vincent Calabrese, incorporating "tourbillon concept" from a model that Calabrese made to illustrate the controversial definition of 'karrusel' vs 'tourbillon'. Calabrese concept scale model...
From a scientific point of view ...
Bahne Bonniksen's original layout of the karrusell escapement seems to have the balance wheel 'E' in the center of the platform as can be seen from the drawings in the Swiss patent No. 7965 dated 27. January 1894. From a scientific point of view there is ...