Wattwins - A novel two degrees-of-freedom (2-DOF) flexure mechanical watch time base
Ғылым және технология
This video depicts a novel two degrees-of-freedom (2-DOF) mechanical watch time base called Wattwins. The video demonstrates how this silicon flexure (aka compliant) oscillator can be driven by a mechanical watch movement. In comparison to the widely used balance and hairspring 1-DOF oscillator, 2-DOF oscillators have the potential of revolutionizing mechanical watchmaking by eliminating the traditional escapement, replacing it by a simple crank driving a pin. Detailed explanations about the design of this oscillator and how it is made insensitive to linear accelerations such as gravity can be found in the following article:
- H. Schneegans, E. Thalmann, S. Henein, “Shaking force balancing of a 2-DOF isotropic horological oscillator”, Precision Engineering, vol. 72, 2021, pp.502-520, doi.org/10.1016/j.precisionen...
More information about the IsoSpring concept, i.e., 2-DOF mechanical time bases, can be found in the following publications:
- L. Rubbert, R. Bitterli, N. Ferrier, S. Fifanski, I. Vardi, S. Henein, “Isotropic springs based on parallel flexure stages”, Precision Engineering, vol. 43, 2016, pp 132-145, doi.org/10.1016/j.precisionen....
- I. Vardi, L. Rubbert, R. Bitterli, N. Ferrier, M. Kahrobaiyan, B. Nussbaumer, S. Henein, “Theory and design of spherical oscillator mechanisms”, Precision Engineering, vol. 51, 2018, pp. 499-513, doi.org/10.1016/j.precisionen....
- S. Henein, I. Vardi, L. Rubbert, R. Bitterli, N. Ferrier, S. Fifanski, D. Lengacher, “IsoSpring : vers la montre sans échappement”, Journée d'étude de la Société Suisse de Chronométrie 2014, infoscience.epfl.ch/record/20...
Clock-size implementations of the concept can also be seen in the following videos:
- • Le futur de l’horloge ...
- • IsoSpring la fin du ...
Wattwins contributors: R. Bitterli, L. Convert, T. Füssinger, R. Gillet, S. Henein, M.H. Kahrobaiyan, A. Maurel, B. Nussbaumer, H. Schneegans, E. Thalmann, I. Vardi.
Video edited by Etienne Thalmann.
Пікірлер: 23
Amazing! Good work!
how does it handle motion? id expect gyroscopic or coriolis effects to mess with it
@emiliaolfelt6370
6 ай бұрын
temperature changes as well. honestly i'm sure it's mostly for show.
Looks like a bad idea. I love it.
pretty sure temperature changes would cause significant drift in frequency
So it's 115,200bph or 32 beats per second. That's more than 3 times Seiko's 'Hi-Beat'. The seconds hand would sweep so quickly the human eye couldn't perceive the 'steps', similar to that of video and frame rates. So what happened to it? Do we have to wait another 20+ years like we did with the co-axial escapement now employed in Omega movements?
@ff-qf1th
7 ай бұрын
You use gears to divide the rotational motion into the length of a second
@TonboIV
6 ай бұрын
The mechanism depicted is not an escapement. It does not start and stop the going train at all. The motion of the 4 oscillators is converted by the flexure into continuous rotary motion of the crank, which means that the hands should glide, not stepping at all. How precisely this mechanism will be able to keep time, I don't know.
@logitech4873
6 ай бұрын
You could just use electric motors for this
@josephastier7421
6 ай бұрын
@@logitech4873 BLASPHEMY!!!
@ilanpi
6 ай бұрын
There are no "steps." Since there is no escapement, there is no longer any stop and go motion of the movement.
How long does it last?
@Leadvest
6 ай бұрын
Typically flexures don't slide, or undergo plastic deformation in normal operation, this extends their potential lifespan significantly.
@pqr590
6 ай бұрын
@@Leadvest I mean the spring action, how long does it keep time per activation
I thought they specifically avoided this type of non-escapement oscillator because of its inaccuracy and its ability to drift off
@Dan-gs3kg
5 ай бұрын
The paper in the description argues otherwise.
@molomono9481
4 ай бұрын
That's not what people buy mechanical watches for.
I'm still a long way from being so small
This concept is due to Mohammad Kahrobaiyan.
What is happening there
@ff-qf1th
7 ай бұрын
wobbley thing wobbles (oscillates) at a specific frequency, which can be connected to gears and multiplied/divided into the length of seconds to track time.
@MattCantSpeakIt
6 ай бұрын
@@ff-qf1th How do you wind it though? Just by giving it a quick wack, it would be enough to keep going all night?
@Dan-gs3kg
5 ай бұрын
@@MattCantSpeakIt the system still has a main spring that provides power. The tuned oscillator acts like a governor to prevent time drift in a continuous manner as opposed to an escapement.