2. Electric clocks
2.1 Classification of horo-electric devices
The advantages of using electrical energy over mechanical devices are as follows:
the use of electrical energy eliminates some of the loss of mechanical energy, due to the absence of a reduction gear between the motor and the exhaust;
the transmission of energy during the impulse is continuous and metered; the electric exhaust is more efficient; it is possible to systematically reduce motor torque as the amplitude increases 2.2.3
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Electric clocks
Time distribution
Organizations
Research centers and laboratories
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France
ENSMM École Nationale Supérieure de Mécanique et des Microtechniques de Besançon. http://www.ens2m.fr/
France Telecom R & D http://www.rd.francetelecom.fr/
...
Standardization
Association française de normalisation (AFNOR) http://www.boutique.afnor.fr
Watchmaking
General
- Engrenages à denture cycloïdale corrigée ou à développante. Modules préférentiels. - NF S 80-501 - 3.95
- Engrenages à denture cycloïdale corrigée ou à développante. Dentures pour couples d'engrenages. - NF S 80-504 - 3.95
- Engrenages à denture cycloïdale corrigée ou à développante....
Manufacturers
(Non-exhaustive list)
Mechanical movements for watches (main)
Citizen
Jaeger Lecoultre: http://www.jaeger-lecoultre.com
Lemania
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