Homepage - Contents - M. Automatic Quartz Watch, 2. Samara, Jean d'Eve and Kinetron < Previous page | Next page >

M.2 Samara, Jean d'Eve and Kinetron

The 'Samara' of Jean d'Eve has no problem with the voltage level, due to its 14-pole generator. In the original system, as shown in figure 2, the eccentrically rotating mass is coupled to the multipole rotor by an intermediate spring in the interior of the rotor cylinder. Each time the magnetic detent torque between stator and rotor of the generator is exceeded by the spring torque, the spring releases and puts the rotor into fast rotation. In this way a fixed amount of electrical energy is produced at every relaxation of the spring. Such a 'burst' occurs immediately after the angular displacement between rotating mass and generator rotor has exceeded a certain value, independently of the speed of the rotating mass. In this way even slow and tiny movements of the wrist may contribute to the production of electrical energy. The maximum power reserve of the original Samara is sufficient for ten days.
An improved system has recently been developed by Kinetron. A much larger spiral spring, placed in a separate barrel, has taken the function of the original tiny spring inside the rotor.

< Previous page |  Top  | Next page >

Copyright by Pieter Doensen

email: doensen@xs4all.nl

All rights reserved. No part of this work may be reproduced or used in any forms or by any means - graphic, electronic or mechanical, including (but not limited to) photocopying or information storage and retrieval systems - without written permission from the copyright holder.