First-Hand:The First Quartz Wrist Watch: Difference between revisions
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== All that was left was to convert the pulses appearing at the end of the divider chain into step by step advancements of the second hand. Jean Hermann and François Niklès proposed in 1967 a simple solution of such a stepping [[Image:Image018.jpg|thumb|right|150px]]motor for Beta 1 as seen in the picture. The setup incorporated an anchor wheel and an anchor which were responsible for the go and stop of the second hand. Much different as in mechanical watches, where the anchor and the anchor wheel act as escapement, here the anchor drives the anchor wheel by wiggling forth and back. The anchor was activated by means of a bobbin coil, which was attached to the anchor and which was magnetized by bipolar electric pulses. The duration and the amplitude of the pulses had to be well controlled to warrant proper operation and to save battery power. The duration of the pulses were derived from the pulse pattern appearing along the divider chain using boolean logic. The concept and the basics had been worked out as early as 1966. == | == All that was left was to convert the pulses appearing at the end of the divider chain into step by step advancements of the second hand. Jean Hermann and François Niklès proposed in 1967 a simple solution of such a stepping [[Image:Image018.jpg|thumb|right|150px]]motor for Beta 1 as seen in the picture. The setup incorporated an anchor wheel and an anchor which were responsible for the go and stop of the second hand. Much different as in mechanical watches, where the anchor and the anchor wheel act as escapement, here the anchor drives the anchor wheel by wiggling forth and back. The anchor was activated by means of a bobbin coil, which was attached to the anchor and which was magnetized by bipolar electric pulses. The duration and the amplitude of the pulses had to be well controlled to warrant proper operation and to save battery power. The duration of the pulses were derived from the pulse pattern appearing along the divider chain using boolean logic. The concept and the basics had been worked out as early as 1966. == | ||
== <br><u>6. Beta 2</u><br><br><u>6.1 Autonomy:</u> | == <br>'''<u>6. Beta 2</u>'''<br><br><u>6.1 Autonomy:</u> == | ||
== The office of the governing assembly had little sympathy for the new direction with the quartz wrist watch. They were hoping for an electronic watch, exhibiting at least one advantage compared with existing electronic watches, remember the strategy and here was a watch with a battery life time of less than one year! One representative of the office, not very familiar with electronics and its progress made it a must: Life time had to be equal or longer than one year.<br><br><u>6.2 Wrong strategy:</u> == | == The office of the governing assembly had little sympathy for the new direction with the quartz wrist watch. They were hoping for an electronic watch, exhibiting at least one advantage compared with existing electronic watches, remember the strategy and here was a watch with a battery life time of less than one year! One representative of the office, not very familiar with electronics and its progress made it a must: Life time had to be equal or longer than one year.<br><br><u>6.2 Wrong strategy:</u> == |
Revision as of 07:35, 15 March 2009
The First Quartz Wrist Watch
by Armin H. Frei, LSM
Former Research Staff Member Centre Electronique Horloger
Content:
1. Introduction
2. Centre Eléctronique Horloger (CEH), Neuchâtel
2.1 Foundation
2.2 Goal and Strategy
3. Change of Strategy: Montre-bracelet à Quartz
3.1 Status
3.2 Initiative
3.3 Change of Strategy
4. The First Quartz Wrist Watch: Beta 1
4.1 World First
5. Components of Beta 1
5.1 Beta 1
5.2 Quartz Resonator
5.3 Driver Circuit
5.4 Frequency Adjustment
5.5 Temperature Compensation
5.6 Frequency Divider
5.7 Stepping Motor
6. Beta 2
6.1 Autonomy
6.2 Wrong Strategy
7. Beta 21
7.1 Industrial Version
7.2 Phase-out Model
8. Chronology of the First Quartz Wrist Watch
9. Rectification
10. Bibliography