Re: All about The Quartz Watch – Show & Discuss
Posted: Sat May 23, 2020 1:27 pm
The Quartz Crystal Watch Movement
The Evolution of the Quartz Crystal Clock
This is an excellent, long and detailed paper on the history of human timekeeping and in particular the scientific research and discoveries that would eventually make the quartz wristwatch movement possible.
https://ieee-uffc.org/about-us/history/ ... clock/?amp
Pre-Production Quartz Prototypes
1967
First Quartz Wristwatch Prototypes
The Beta 1 prototype, using an 8192 Hz quartz oscillator and a stepper motor for the seconds hand, was the first fully operational quartz wristwatch completed in July 1967 at the Centre Electronique Horloger (CEH), a consortium of Swiss companies working on the development of an electronic watch.
Later that same year, the Beta 1, the modified Beta 2 with a vibrating motor that would eventually lead to the Beta 21 production model, and entries from Suwa Seikosha (now known as Seiko) were entered at the Centre Electronique Horloger (C.E.H.) in Neuchâtel, Switzerland, chronometer competition. The first year quartz wristwatches where included in the competition. A competition for timekeeping stability, precision, not accuracy. A watch capable of continuous performance of 10 seconds fast per day is more precise than a watch that may be accurate at some point in time but whose timekeeping fluctuates.
1967 was the first time quartz watches participated in the competition. There were five Beta 1 and six Beta 2 C.E.H entries, the first Beta 1 was assigned # CEH-1020, and five watches from Suwa Seikosha. The CEH Omega Beta 2 entry had the best performance of the group. The first Beta 1 performed 5th best with CEH entries taking the first 10 places. All entries performed better than their mechanical counterparts. The future evolutionary path of the wristwatch was evident. The Beta 1 technology would be adopted and progress into future successful quartz watches. (Couldn't find information about the Seiko quartz prototypes technology or when they were first fully functional.)
CEH Beta 1
Suwa-Seikosha Prototype
https://ethw.org/First-Hand:The_First_Q ... rist_Watch
http://ieee-uffc.org/wp-content/uploads ... 1/step.pdf
https://www.plus9time.com/blog/2019/6/1 ... tz-entries
The Evolution of the Quartz Crystal Clock
This is an excellent, long and detailed paper on the history of human timekeeping and in particular the scientific research and discoveries that would eventually make the quartz wristwatch movement possible.
https://ieee-uffc.org/about-us/history/ ... clock/?amp
Pre-Production Quartz Prototypes
1967
First Quartz Wristwatch Prototypes
The Beta 1 prototype, using an 8192 Hz quartz oscillator and a stepper motor for the seconds hand, was the first fully operational quartz wristwatch completed in July 1967 at the Centre Electronique Horloger (CEH), a consortium of Swiss companies working on the development of an electronic watch.
Later that same year, the Beta 1, the modified Beta 2 with a vibrating motor that would eventually lead to the Beta 21 production model, and entries from Suwa Seikosha (now known as Seiko) were entered at the Centre Electronique Horloger (C.E.H.) in Neuchâtel, Switzerland, chronometer competition. The first year quartz wristwatches where included in the competition. A competition for timekeeping stability, precision, not accuracy. A watch capable of continuous performance of 10 seconds fast per day is more precise than a watch that may be accurate at some point in time but whose timekeeping fluctuates.
1967 was the first time quartz watches participated in the competition. There were five Beta 1 and six Beta 2 C.E.H entries, the first Beta 1 was assigned # CEH-1020, and five watches from Suwa Seikosha. The CEH Omega Beta 2 entry had the best performance of the group. The first Beta 1 performed 5th best with CEH entries taking the first 10 places. All entries performed better than their mechanical counterparts. The future evolutionary path of the wristwatch was evident. The Beta 1 technology would be adopted and progress into future successful quartz watches. (Couldn't find information about the Seiko quartz prototypes technology or when they were first fully functional.)
CEH Beta 1
Suwa-Seikosha Prototype
https://ethw.org/First-Hand:The_First_Q ... rist_Watch
http://ieee-uffc.org/wp-content/uploads ... 1/step.pdf
https://www.plus9time.com/blog/2019/6/1 ... tz-entries