GB1416728A - Resonator drive circuits for time measuring devices - Google Patents
Resonator drive circuits for time measuring devicesInfo
- Publication number
- GB1416728A GB1416728A GB5893972A GB5893972A GB1416728A GB 1416728 A GB1416728 A GB 1416728A GB 5893972 A GB5893972 A GB 5893972A GB 5893972 A GB5893972 A GB 5893972A GB 1416728 A GB1416728 A GB 1416728A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tuning fork
- resonator
- measuring devices
- time measuring
- drive circuits
- 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
- G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
- G04C3/08—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically
- G04C3/10—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a mechanical oscillator other than a pendulum or balance, e.g. by a tuning fork, e.g. electrostatically driven by electromagnetic means
- G04C3/108—Driving circuits
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N97/00—Electric solid-state thin-film or thick-film devices, not otherwise provided for
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Oscillators With Electromechanical Resonators (AREA)
- Electric Clocks (AREA)
Abstract
1416728 Tuning fork oscillators BULOVA WATCH CO Inc 20 Dec 1972 [17 April 1972] 58939/72 Heading H3T [Also in Division G3] An integrated circuit chip in a circuit for sustaining oscillations of a mechanical resonator (e.g. in a watch) comprises a capacitor 18 in the picofarad range, a resistor 19 in the megohm range and a " super-gain " switching transistor 17. The integrated circuit is connectable to a drive coil 13 and a sensing coil 15 which cooperate with permanent magnets 12, 14 on a tuning fork, the arrangement forming a Hartley oscillator. The tuning fork may be coupled to an indexing mechanism either mechanically or magnetically (not shown) or the oscillations may be used to produce pulses to activate an electronic time display. Alternatively the resonator may be a balance wheel.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00244644A US3727151A (en) | 1972-04-17 | 1972-04-17 | Integrated circuit for electronic timepieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1416728A true GB1416728A (en) | 1975-12-03 |
Family
ID=22923573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5893972A Expired GB1416728A (en) | 1972-04-17 | 1972-12-20 | Resonator drive circuits for time measuring devices |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3727151A (en) |
| JP (1) | JPS4919932A (en) |
| CA (1) | CA964869A (en) |
| CH (1) | CH556052A (en) |
| DE (1) | DE2263813C3 (en) |
| ES (1) | ES410071A1 (en) |
| FR (1) | FR2180640B1 (en) |
| GB (1) | GB1416728A (en) |
| HK (1) | HK56676A (en) |
| IT (1) | IT973247B (en) |
| NL (1) | NL150240B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5156674A (en) * | 1974-11-14 | 1976-05-18 | Citizen Watch Co Ltd | |
| JPS51127657A (en) * | 1975-04-28 | 1976-11-06 | Seiko Instr & Electronics Ltd | Standard signal generator |
| JPS51138064U (en) * | 1975-04-28 | 1976-11-08 | ||
| US4001869A (en) * | 1975-06-09 | 1977-01-04 | Sprague Electric Company | Mos-capacitor for integrated circuits |
| JPH0540224A (en) * | 1990-07-26 | 1993-02-19 | Fuji Photo Film Co Ltd | Scan type microscope |
| FI124103B (en) * | 2010-02-22 | 2014-03-14 | Murata Electronics Oy | Improved micromechanical construction for a resonator |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3421309A (en) * | 1966-06-13 | 1969-01-14 | Bulova Watch Co Inc | Unitized tuning fork vibrator |
-
1972
- 1972-04-17 US US00244644A patent/US3727151A/en not_active Expired - Lifetime
- 1972-12-08 CA CA158,500A patent/CA964869A/en not_active Expired
- 1972-12-20 NL NL727217397A patent/NL150240B/en unknown
- 1972-12-20 GB GB5893972A patent/GB1416728A/en not_active Expired
- 1972-12-27 ES ES410071A patent/ES410071A1/en not_active Expired
- 1972-12-27 CH CH1885672A patent/CH556052A/xx unknown
- 1972-12-28 JP JP48004343A patent/JPS4919932A/ja active Pending
- 1972-12-28 DE DE2263813A patent/DE2263813C3/en not_active Expired
- 1972-12-28 FR FR7246672A patent/FR2180640B1/fr not_active Expired
- 1972-12-29 IT IT33981/72A patent/IT973247B/en active
-
1976
- 1976-09-16 HK HK566/76*UA patent/HK56676A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| CH1885672A4 (en) | 1974-05-15 |
| IT973247B (en) | 1974-06-10 |
| DE2263813A1 (en) | 1973-10-25 |
| DE2263813B2 (en) | 1978-04-13 |
| JPS4919932A (en) | 1974-02-21 |
| ES410071A1 (en) | 1976-04-01 |
| FR2180640A1 (en) | 1973-11-30 |
| CA964869A (en) | 1975-03-25 |
| CH556052A (en) | 1974-11-15 |
| HK56676A (en) | 1976-09-24 |
| NL150240B (en) | 1976-07-15 |
| FR2180640B1 (en) | 1977-04-08 |
| US3727151A (en) | 1973-04-10 |
| NL7217397A (en) | 1973-10-19 |
| DE2263813C3 (en) | 1978-11-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |