GB851480A - Improvements in or relating to electric clocks - Google Patents
Improvements in or relating to electric clocksInfo
- Publication number
- GB851480A GB851480A GB39515/56A GB3951556A GB851480A GB 851480 A GB851480 A GB 851480A GB 39515/56 A GB39515/56 A GB 39515/56A GB 3951556 A GB3951556 A GB 3951556A GB 851480 A GB851480 A GB 851480A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- resistor
- obergfell
- generator
- transistor
- 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
- G04C3/066—Constructional details, e.g. disposition of coils
Abstract
851,480. Electric clocks. OBERGFELL, R., and OBERGFELL, H., [trading as KIENINGER & OBERGFELL]. Dec. 28, 1956 [Dec. 28, 1955; April 13, 1956; July 2, 1956], No. 39515/56. Class 139 An electric clock comprises an oscillating member driven by interaction between a magnetic member and a motor coil, a semi-conductor device, e.g. a transistor, the output of which is fed to the motor coil, a generator coil in which impulses are generated by relative motion between the generator coil and the magnetic member, and a resistor connected in parallel with the motor coil and is characterised in that the generator coil, the motor coil, the value of said resistor and the transistor are such that the output characteristic of the transistor (collector current plotted against battery voltage) includes a comparatively flat portion on which the operating point is located. The resistor may be of the negative temperature coefficient type or an additional such resistor may be provided. In the first example, Fig. 2, the oscillating member is a balance 7 carrying a bar magnet 5 and the generator and motor coils 2 and 3 are shaped so that the air gap between them and the magnet is substantially constant. In another example, Fig. 5, the mechanical oscillator is a pendulum 15 suspended from a bi-metallic strip 19. In a modification the pendulum is supported in the usual manner but the support is acted on by a bi-metallic strip. It is suggested that temperature compensation may be effected by an aneroid cylinder.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE851480X | 1955-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB851480A true GB851480A (en) | 1960-10-19 |
Family
ID=6781287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB39515/56A Expired GB851480A (en) | 1955-12-28 | 1956-12-28 | Improvements in or relating to electric clocks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB851480A (en) |
-
1956
- 1956-12-28 GB GB39515/56A patent/GB851480A/en not_active Expired
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