GB178482A - Improvements in electro-magnetic clocks - Google Patents
Improvements in electro-magnetic clocksInfo
- Publication number
- GB178482A GB178482A GB3193520A GB3193520A GB178482A GB 178482 A GB178482 A GB 178482A GB 3193520 A GB3193520 A GB 3193520A GB 3193520 A GB3193520 A GB 3193520A GB 178482 A GB178482 A GB 178482A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pendulum
- clock
- movement
- arm
- gearing
- 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
- G04C3/02—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 pendulum
- G04C3/027—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 pendulum using electromagnetic coupling between electric power source and pendulum
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Control Devices (AREA)
Abstract
178,482. Bulle, M. P. Favre-. Nov. 11,1920. Electric clocks; clock; framework; clock movements.-An electromagnetic clock has a forked rocking member 14, Figs. 1 and 2, which drives the clock-work by means of a pawl 6 and is engaged by an arm 16 on the pendulum 3, the contact of the arm 16 with one of the prongs of the member 14 causing the excitation of the magnet coil that maintains the motion of the pendulum. The pivot 15 of the member 14 is arranged below its centre of gravity, a stop 17 being arranged to limit its movement. The ratchet-wheel 7 engaged by the pawl 6 has fixed to it a worm 8 engaging a worm-wheel 9 on the shaft 10 of the minute-hand. All the gearing may be carried by an arm 19. In a modification, a pin 7<a>, Figs. 1<a> and 2<a>, on the pendulum 8<a> engages a forked rocking member 1<a> which is pivoted above its centre of gravity, a brake being applied to control its movement. The pin 7<a> is only slightly smaller than the slot e<a>, one side of which is faced with silver or other conducting-material, thus causing the pendulum gradually to resume its full movement after its movement has been accidentally reduced. In either of the two modifications the gearing may be carried by a frame consisting of a part 15<a> to which is secured a piece 16<a> of square tubing, an extension piece 17<a> being secured to the front face of the tubing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3193520A GB178482A (en) | 1920-11-11 | 1920-11-11 | Improvements in electro-magnetic clocks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3193520A GB178482A (en) | 1920-11-11 | 1920-11-11 | Improvements in electro-magnetic clocks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB178482A true GB178482A (en) | 1922-04-11 |
Family
ID=10330580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3193520A Expired GB178482A (en) | 1920-11-11 | 1920-11-11 | Improvements in electro-magnetic clocks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB178482A (en) |
-
1920
- 1920-11-11 GB GB3193520A patent/GB178482A/en not_active Expired
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