Publications related to Rocker oscillator time bases

Shaking force balancing of a 2-DOF isotropic horological oscillator

Simon Nessim Henein, Hubert Pierre-Marie Benoît Schneegans, Etienne Frédéric Gabriel Thalmann

Despite centuries of research and significant advances, the escapement mechanism used to count and maintain oscillations of mechanical time bases remains a complex mechanism and a major source of energy losses. We showed in previous work that, instead of t ...

2021

Optical measurement method for mechanical time base characterization

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann

The recent adoption of silicon components by the mechanical watch industry has triggered the search for new time bases to advantageously replace the traditional balance and hairspring oscillator. In particular, flexure-based oscillators manufactured in sil ...

2021

Flexure Pivot Oscillators for Mechanical Watches

Etienne Frédéric Gabriel Thalmann

It appears that the concerted efforts of the watchmaking industry are leading towards a limit in mechanical watch accuracy. The general consensus in horology is that the time base's quality factor, a dimensionless number that characterizes the oscillator d ...

EPFL2020

Flexure Pivot Oscillator With Intrinsically Tuned Isochronism

Simon Nessim Henein, Ilan Vardi, Etienne Frédéric Gabriel Thalmann, Mohammad Hussein Kahrobaiyan

The most important property for accurate mechanical time bases is isochronism: the independence of period from oscillation amplitude. This paper develops a new concept in isochronism adjustment for flexure-based watch oscillators. Flexure pivot oscillators ...

2020

Design of a Flexure Based Low Frequency Foucault Pendulum

Simon Nessim Henein, Ilan Vardi, Patrick Robert Flückiger

The Foucault pendulum is a well-known mechanism used to demonstrate the rotation of the Earth. It consists in a pendulum launched on linear orbits and, following Mach’s Principle, this line of oscillation will remain fixed with respect to absolute space bu ...

2020

On Time Synchronization Issues in Time-Sensitive Networks with Regulators and Nonideal Clocks

Jean-Yves Le Boudec, Ludovic Bernard Gérard Thomas

Flow reshaping is used in time-sensitive networks (as in the context of IEEE TSN and IETF Detnet) in order to reduce burstiness inside the network and to support the computation of guaranteed latency bounds. This is performed using per-flow regulators (suc ...

Association for Computing Machinery2020

Conceptual design of a rotational mechanical time base with varying inertia

Simon Nessim Henein, Etienne Frédéric Gabriel Thalmann

Flexure pivot oscillators have the potential to advantageously replace the traditional balance wheel-spiral spring oscillator used in mechanical watches due to their significantly lower friction. However, they have inherent nonlinear elastic properties tha ...

2019

Programmable Multistable Mechanisms: Design, modeling, characterization and applications

Mohamed Gamal Abdelrahman Ahmed Zanaty

Multistable Mechanisms are mechanical devices having more than one stable state. Since these mechanisms can maintain different deformations with zero force, they are advantageous for low power environments such as wristwatches and medical devices. In this ...

EPFL2018

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Rocker oscillator time bases

Shaking force balancing of a 2-DOF isotropic horological oscillator

Optical measurement method for mechanical time base characterization

Flexure Pivot Oscillators for Mechanical Watches

Flexure Pivot Oscillator With Intrinsically Tuned Isochronism

Design of a Flexure Based Low Frequency Foucault Pendulum

On Time Synchronization Issues in Time-Sensitive Networks with Regulators and Nonideal Clocks

Conceptual design of a rotational mechanical time base with varying inertia

Automatically Starting and Secured Detent Escapement for a Timepiece

Low-Power Design of Digital VLSI Circuits around the Point of First Failure

Programmable Multistable Mechanisms: Design, modeling, characterization and applications

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Chat with Graph Search

Flexure Pivot Oscillators for Mechanical Watches

Shaking force balancing of a 2-DOF isotropic horological oscillator

Programmable Multistable Mechanisms: Design, modeling, characterization and applications

Low-Power Design of Digital VLSI Circuits around the Point of First Failure

Design of a Flexure Based Low Frequency Foucault Pendulum

Flexure Pivot Oscillator With Intrinsically Tuned Isochronism

Optical measurement method for mechanical time base characterization

Conceptual design of a rotational mechanical time base with varying inertia

On Time Synchronization Issues in Time-Sensitive Networks with Regulators and Nonideal Clocks

Automatically Starting and Secured Detent Escapement for a Timepiece