GB993140A - Improvements in or relating to electric timepieces - Google Patents
Improvements in or relating to electric timepiecesInfo
- Publication number
- GB993140A GB993140A GB612062A GB612062A GB993140A GB 993140 A GB993140 A GB 993140A GB 612062 A GB612062 A GB 612062A GB 612062 A GB612062 A GB 612062A GB 993140 A GB993140 A GB 993140A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vibrator
- feb
- elements
- kabushiki kaisha
- electric
- 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
- 229910000942 Elinvar Inorganic materials 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
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
- G04C3/12—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 piezoelectric means; driven by magneto-strictive means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
993,140. Clocks and watches. KABUSHIKI KAISHA SUWA SEIKOSHA, and KABUSHIKI KAISHA DAINI SEIKOSHA. Feb. 16,1962 [Feb. 16, 1961; Feb. 18,1961], No. 6120/62. Heading G3T. [Also in Division H3] An electric timepiece comprises an elastic vibrating member such as a tuning fork forming a time standard, this vibrator being maintained, through a suitable amplifier, by driving and detecting piezo-electric elements a, b respectively fixed to the vibrator which drives the time train through a pawl and ratchet not shown. As shown, connections from the elements a, b along with a third connection from the root of the fork, are made to a circuit comprising the transistor Tr, battery Bt, circuit switch SW, resistors R 1 , R 2 , R 4 and R 5 , and capacitors C 1 and C 2 . The vibrator may be in the form of a straight bar supported at two nodes. In another embodiment, the vibrator is in the form of a gapped circular ring carrying added masses at its free ends, the ring being supported at two nodes near which the elements a, b are fixed. The vibrator may be of a material possessing an invariable elastic modulus in ordinary temperatures, e.g. elinvar.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP716361 | 1961-02-16 | ||
JP532361 | 1961-02-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB993140A true GB993140A (en) | 1965-05-26 |
Family
ID=26339246
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB612062A Expired GB993140A (en) | 1961-02-16 | 1962-02-16 | Improvements in or relating to electric timepieces |
Country Status (3)
Country | Link |
---|---|
CH (1) | CH400917A (en) |
DE (1) | DE1523943A1 (en) |
GB (1) | GB993140A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3462939A (en) * | 1965-02-12 | 1969-08-26 | Tokei Kk | Mechanical vibrator for timepiece |
US3512352A (en) * | 1967-04-12 | 1970-05-19 | Seiko Instr & Electronics | Frequency regulator and method for regulating frequency of electric timepieces |
US3747326A (en) * | 1970-07-17 | 1973-07-24 | Siemens Ag | Clock drive with piezoelectric tuning fork |
-
1962
- 1962-02-15 CH CH194162A patent/CH400917A/en unknown
- 1962-02-15 DE DE19621523943 patent/DE1523943A1/en active Pending
- 1962-02-16 GB GB612062A patent/GB993140A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3462939A (en) * | 1965-02-12 | 1969-08-26 | Tokei Kk | Mechanical vibrator for timepiece |
US3512352A (en) * | 1967-04-12 | 1970-05-19 | Seiko Instr & Electronics | Frequency regulator and method for regulating frequency of electric timepieces |
US3747326A (en) * | 1970-07-17 | 1973-07-24 | Siemens Ag | Clock drive with piezoelectric tuning fork |
Also Published As
Publication number | Publication date |
---|---|
CH400917A (en) | 1965-06-30 |
DE1523943A1 (en) | 1969-12-11 |
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