GB491487A - Improvements in and relating to an electrically maintained balance and contact device for clocks - Google Patents
Improvements in and relating to an electrically maintained balance and contact device for clocksInfo
- Publication number
- GB491487A GB491487A GB1536438A GB1536438A GB491487A GB 491487 A GB491487 A GB 491487A GB 1536438 A GB1536438 A GB 1536438A GB 1536438 A GB1536438 A GB 1536438A GB 491487 A GB491487 A GB 491487A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fixed
- lever arm
- clocks
- contact
- balance
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Manipulator (AREA)
Abstract
491,487. Electric clocks. LANFRANCONI, F. A., and BRITISH VACUUM CLEANER & ENGINEERING CO., Ltd. Jan. 27, 1937, Nos. 15364/38 and 15365/38. Divided out of 491,442. [Class 139] In an electrically maintained balance and contact mechanism for clocks of the kind in which an oscillating magnetic bar or plate 15 is influenced by an electromagnet 8 supplied with impulses by means of a lever arm 18 rocked at intervals by a projection 25 fixed to the balance, the lever arm 18 is rigid and is pivoted at a fixed point 19, and a moving contact comprising a pin or projection 17 fixed to the lever arm makes momentary wiping contact with a resilient fixed contact 20. A leaf spring 24 engages a recess 24a in the lever arm tending to open the contacts. The pin 17 may be arranged to bridge a pair of fixed contacts. The clock is self-starting. Specification 491,442 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1536438A GB491487A (en) | 1937-01-27 | 1937-01-27 | Improvements in and relating to an electrically maintained balance and contact device for clocks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1536438A GB491487A (en) | 1937-01-27 | 1937-01-27 | Improvements in and relating to an electrically maintained balance and contact device for clocks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB491487A true GB491487A (en) | 1938-08-29 |
Family
ID=10057855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1536438A Expired GB491487A (en) | 1937-01-27 | 1937-01-27 | Improvements in and relating to an electrically maintained balance and contact device for clocks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB491487A (en) |
-
1937
- 1937-01-27 GB GB1536438A patent/GB491487A/en not_active Expired
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