GB511327A - An improved time measuring apparatus comprising a synchronous motor and an auxiliary movement - Google Patents
An improved time measuring apparatus comprising a synchronous motor and an auxiliary movementInfo
- Publication number
- GB511327A GB511327A GB22857/38A GB2285738A GB511327A GB 511327 A GB511327 A GB 511327A GB 22857/38 A GB22857/38 A GB 22857/38A GB 2285738 A GB2285738 A GB 2285738A GB 511327 A GB511327 A GB 511327A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- pin
- relay
- lever
- stop
- 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
- G04C15/00—Clocks driven by synchronous motors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
511,327. Electric clocks. LANDIS & GYR AKT.-GES. Aug. 2, 1938, No. 22857. Convention date, Sept. 2, 1937. [Class 139]. In a time-measuring apparatus (e.g. for driving a switch disc) having a synchronous driving motor and a spring-driven reserve movement, a separate detent relay 2 for holding and releasing the escapement 21 is of low voltage relatively to the voltage of the motor. The winding of this detent relay is in series with the exciting coil of the motor or is in parallel with a portion of said coil. The relay armature 6, 3 is attached to the end 10 of a lever 11 which is pivoted at 12 weighted at 13 and counter weighted at 14. Attached also to shaft 12 is an arm 18 moving between stops 15, 16 and a leaf spring 17 coacting with stop 19 and with a pin 20 on the balance 21 of the reserve movement. The relay bobbin is wound directly on to core 1, the latter being carried by insulation. Under normal conditions, with current flowing and the synchronous motor 25, Fig. 1 (not shown) driving the switch disc, the lever 11 is attracted counterclockwise to the position shown, the blade 17 being stressed against the stop 19 and its end arresting the stop 20 in a position in which the hairspring is still partially stressed. At current failure, or fall, armature 3 is released, arm 18 moves till it meets the still stressed blade 17 and the latter is next removed suddenly from pin 20 on to pin 16 so that the balance starts automatically owing to the stored energy in the hairspring. To avoid sticking of the balance, the lever 11 is rocked periodically to free the wheel 21 by a pin 40, Fig. 1 (not shown) on a gear wheel rotated by the synchronous motor. The reserve movement may be a pendulum movement, and a spring may replace the weight 13. The exciting coil of the motor may have tappings so that the apparatus may be used with different voltages.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH511327X | 1937-09-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB511327A true GB511327A (en) | 1939-08-16 |
Family
ID=4517453
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22857/38A Expired GB511327A (en) | 1937-09-02 | 1938-08-02 | An improved time measuring apparatus comprising a synchronous motor and an auxiliary movement |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB511327A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2669088A (en) * | 1949-02-14 | 1954-02-16 | Clyde R Boyd | Combined electrically-mechanically operated clock |
-
1938
- 1938-08-02 GB GB22857/38A patent/GB511327A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2669088A (en) * | 1949-02-14 | 1954-02-16 | Clyde R Boyd | Combined electrically-mechanically operated clock |
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