Concept

Balancier (horlogerie)

Publications associées (29)

Programmable Multistable Mechanisms: Design, modeling, characterization and applications

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

Theory and design of spherical oscillator mechanisms

Simon Nessim Henein, Roland Andreas Bitterli, Ilan Vardi, Lennart Rubbert, Mohammad Hussein Kahrobaiyan, Nicolas Ferrier, Billy Nussbaumer

In previous work, we showed that two degree of freedom oscillators can be advantageously applied to horological time bases since they can be used to eliminate the escapement mechanism. We subsequently examined planar two degree of freedom oscillators based ...

Elsevier2018

Ultrasonic driving method

Jacques Jacot

A method for driving a first component (11) into a second component (12) by superimposing a mechanical wave of ultrasonic frequency (18) onto the movement (17) of at least one of the components (11, 12). The method comprises a step of adjusting the paramet ...

2016

Bending Compensating Device, System and Method for Optical Waveguides

Demetri Psaltis, Christophe Moser, Damien Claude-Marie Loterie, Edgar Emilio Morales Delgado, Sebastien Walpen

A bending compensation device for a waveguide, including a direction changing device configured to maintain a constant bending angle to the waveguide, a distal end of the waveguide having a first orientation, and the proximal end of the waveguide having a ...

2016

Contact potentials, Fermi level equilibration and surface charging

Hubert Girault, Pekka Eero Peljo

This paper focuses on contact electrification from thermodynamic equilibration of the electron electrochemical potentials of two conductors upon contact. The contact potential difference generated in bimetallic macro- and nanosystems, the Fermi level after ...

American Chemical Society2016

3.6 GHz CMOS Ring Oscillator with Low Tune Voltage Sensitivity and Temperature Compensation

Yusuf Leblebici, Tugba Demirci, Hasene Gülperi Özsema

In this paper we present the design of a temperature compensated low-tune-voltage-sensitive CMOS ring oscillator in 40nm standard CMOS technology. The oscillator has an overall frequency range from 3.1 GHz to 3.6 GHz. The effect of temperature variations o ...

2015

Signaling in 3-D integrated circuits, benefits and challenges

Somayyeh Rahimian Omam

Three-dimensional (3-D) or vertical integration is a design and packaging paradigm that can mitigate many of the increasing challenges related to the design of modern integrated systems. 3-D circuits have recently been at the spotlight, since these circuit ...

EPFL2015

Early Dynamometers (from Muscle to Steam Power)

Jean-François Loude

Spring balances, based on Hooke’s law, have been used for weighing since the early 18th century. At the end of the century, naturalists such as Buffon felt the need to quantify the muscular force of men (humans) and animals. The first practical, portable “ ...

2014

Catalyst Development for Selective Hydrogenation of Functionalized Alkynes and Nitroarenes

Artur Yarulin

Catalyst design is of major importance for fine chemicals industry due to complexity of the synthesis and high product quality requirements. Moreover, the catalyst formulation has to comply with the standards of health, safety and environmental regulati ...

EPFL2014

Influence of Thermocouple Thermal Inertia in Impingement Heat Transfer Experiments Using Transient Techniques

Peter Ott, Alexandros Terzis, Bernhard Weigand, Guillaume Wagner

A typical transient heat transfer experiment for an impingement cooling configuration requires usually a temperature step in the flow. A moving isotherm of the liquid crystal surface coating is then monitored using a video camera. However, for small imping ...

2012

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