GB771229A - Improvements in or relating to devices for maintaining mechanical oscillations - Google Patents
Improvements in or relating to devices for maintaining mechanical oscillationsInfo
- Publication number
- GB771229A GB771229A GB21476/55A GB2147655A GB771229A GB 771229 A GB771229 A GB 771229A GB 21476/55 A GB21476/55 A GB 21476/55A GB 2147655 A GB2147655 A GB 2147655A GB 771229 A GB771229 A GB 771229A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- transistor
- permanent magnet
- amplifier
- collector
- 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
- G04C3/04—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 balance
- G04C3/06—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 balance using electromagnetic coupling between electric power source and balance
- G04C3/065—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 balance using electromagnetic coupling between electric power source and balance the balance controlling gear-train by means of static switches, e.g. transistor circuits
- G04C3/067—Driving circuits with distinct detecting and driving coils
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
771,229. Transistor circuits. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Nov. 3, 1955 [Nov. 6, 1954], No. 31476/55. Class 40(6) [Also in Group XVIII] In a mechanical oscillator, Fig. 1, comprising a shaft 3, a spring 2 and a permanent magnet 1, the permanent magnet induces voltage pulses in a coil 7 which supplies driving force pulses from an amplifier 8 back to the system to maintain the oscillation. The amplifier is rendered non-operative during the intervals between the voltage pulses and is connected to present across the coil an impedance having a negative resistance component. In one embodiment. Fig. 3, the amplifier includes a transistor 10 with the coil 7 connected between the emitter and base, the transistor being back coupled by a collector-base feedback transformer 11 so that the transistor produces a pulsatory collector current when a transient voltage pulse of the appropriate polarity occurs across the coil 7. In other embodiments, Figs. 6 and 7, the coil 7 is included in known oscillatory circuits so that an average collector-current pulse is obtained. A coil 17 may be provided for driving time indicating means. Valve amplifiers, crystal rectifiers or other suitable impedances may be used instead of a transistor. The permanent magnet may be fixed with the coil performing the oscillating movement.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL771229X | 1954-11-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB771229A true GB771229A (en) | 1957-03-27 |
Family
ID=19829497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21476/55A Expired GB771229A (en) | 1954-11-06 | 1955-11-03 | Improvements in or relating to devices for maintaining mechanical oscillations |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB771229A (en) |
-
1955
- 1955-11-03 GB GB21476/55A patent/GB771229A/en not_active Expired
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