GB1412319A - Oscillating balance wheel movement - Google Patents
Oscillating balance wheel movementInfo
- Publication number
- GB1412319A GB1412319A GB5220073A GB5220073A GB1412319A GB 1412319 A GB1412319 A GB 1412319A GB 5220073 A GB5220073 A GB 5220073A GB 5220073 A GB5220073 A GB 5220073A GB 1412319 A GB1412319 A GB 1412319A
- Authority
- GB
- United Kingdom
- Prior art keywords
- balance
- sync
- pulses
- pulse
- driving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C11/00—Synchronisation of independently-driven clocks
- G04C11/08—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction
- G04C11/081—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction using an electro-magnet
- G04C11/084—Synchronisation of independently-driven clocks using an electro-magnet or-motor for oscillation correction using an electro-magnet acting on the balance
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
1412319 Electric timepieces JAZ SA 9 Nov 1973 [10 Nov 1972 3 April 1973] 52200/73 Heading G3T To permit synchronization of an electromagnetically maintained balance 1 with a pulse generator, magnets a, a', Fig. 1, are offset from the driving and control coils in the neutral position of the balance, and the natural balance period is arranged to be different from that of the pulse generator, synchronizing pulses being supplied to the driving coil when the balance is not passing through its neutral position. As shown the magnets are on the balance and the driving and control coils are combined in a fixed structure b, but this may be reversed. The pulse generator is a quartz crystal oscillator Q, Fig. 5, connected via an integrated circuit frequency divider CI to the base of transistor Tr in the balance maintaining circuit. The sync pulses may alternatively be fed to the collector circuit Fig. 3 (not shown), and thus directly to the driving coil Bm. Diode D prevents the sync. pulses from passing through the control coil Bc via capacitor C. If the drive coil and magnets produce repulsion, the balance period (T1), Fig. 4 (not shown) is shorter than the sync. pulse period (T2) and the sync. pulses (is) retard the balance. If magnetic attraction is used, the case is reversed. The circuit gives a maintaining pulse (im) every half cycle and a sync. pulse every cycle.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7239984A FR2206538B1 (en) | 1972-11-10 | 1972-11-10 | |
FR7312009A FR2224796B2 (en) | 1973-04-03 | 1973-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1412319A true GB1412319A (en) | 1975-11-05 |
Family
ID=26217391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5220073A Expired GB1412319A (en) | 1972-11-10 | 1973-11-09 | Oscillating balance wheel movement |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS4996771A (en) |
DE (1) | DE2356297A1 (en) |
GB (1) | GB1412319A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3540528B1 (en) * | 2018-03-16 | 2020-08-05 | The Swatch Group Research and Development Ltd | Timepiece comprising a mechanical movement the oscillating rate of which is controlled by an electronic device |
-
1973
- 1973-11-09 GB GB5220073A patent/GB1412319A/en not_active Expired
- 1973-11-09 JP JP12558273A patent/JPS4996771A/ja active Pending
- 1973-11-10 DE DE19732356297 patent/DE2356297A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JPS4996771A (en) | 1974-09-12 |
DE2356297A1 (en) | 1974-05-22 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |