GB829191A - Electrically maintained balance wheel - Google Patents
Electrically maintained balance wheelInfo
- Publication number
- GB829191A GB829191A GB25581/56A GB2558156A GB829191A GB 829191 A GB829191 A GB 829191A GB 25581/56 A GB25581/56 A GB 25581/56A GB 2558156 A GB2558156 A GB 2558156A GB 829191 A GB829191 A GB 829191A
- Authority
- GB
- United Kingdom
- Prior art keywords
- balance
- coils
- coil
- magnet
- magnetic fields
- 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
- G04C3/061—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 contacts and mechanically driving the gear-train
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
829,191. Oscillating electric motors. HELD, S. Aug. 21, 1956 [Aug. 23, 1955], No. 25581/56. Class 35. [ALso in Group XVIII] In an electric timepiece the going train is driven by a balance which is maintained in oscillation by the interaction between a magnetic field or fields and a current carrying coil or coils, the circuit of which is periodically closed as the balance swings. In principle the coil 1 may be wound into a figure-of-eight, Fig. 1, but in practice two coils of generally triangular shape are used, Fig. 3. The coils are carried by the balance staff and the magnetic fields are provided either by two opposed permanent magnets 3, Fig. 1, or by one permanent magnet and an opposed plate of soft iron. The number of magnetic fields may be increased by arranging additional permanent magnets 5, as shown in dotted lines in Fig. 3. Temperature compensation may be obtained by placing a bar of alloy at its Curie point on the magnet 3. The magnetic fields may be obtained by cylindrical magnets, Fig. 8, or by a magnet of washer form 5, Fig. 9, to which soft iron plates 13, 14 are fixed. The coil circuit contains a switch comprising a flexible contact and a contact carried by the balance. In another example, Fig. 11, a coil 26 oscillates with the balance staff to produce a retarding couple for regulating the amplitude of swing of the balance. The coil may be connected to the input of a semi-conductor amplifier, the output of which is connected to the coils. The coils 1 may be fixed and the magnet or magnets 3 movable, Figs. 14 and 16.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR829191X | 1955-08-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB829191A true GB829191A (en) | 1960-03-02 |
Family
ID=9284116
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB25581/56A Expired GB829191A (en) | 1955-08-23 | 1956-08-21 | Electrically maintained balance wheel |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB829191A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3354329A (en) * | 1964-01-14 | 1967-11-21 | Reich Robert Walter | Magnet arrangement for electric and electronic clocks |
-
1956
- 1956-08-21 GB GB25581/56A patent/GB829191A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3354329A (en) * | 1964-01-14 | 1967-11-21 | Reich Robert Walter | Magnet arrangement for electric and electronic clocks |
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