GB743206A - Improvements in or relating to clockwork mechanisms for controlling alarm devices - Google Patents
Improvements in or relating to clockwork mechanisms for controlling alarm devicesInfo
- Publication number
- GB743206A GB743206A GB669353A GB669353A GB743206A GB 743206 A GB743206 A GB 743206A GB 669353 A GB669353 A GB 669353A GB 669353 A GB669353 A GB 669353A GB 743206 A GB743206 A GB 743206A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spring
- shaft
- clockwork
- knob
- gear train
- 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
- G04F—TIME-INTERVAL MEASURING
- G04F3/00—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork
- G04F3/02—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with mechanical driving mechanisms
- G04F3/027—Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals with driving mechanisms, e.g. dosimeters with clockwork with mechanical driving mechanisms using electrical contacts, e.g. for actuating electro-acoustic device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
743,206. Retractive switches. MIDGLEY, A. H. Feb. 26, 1954 [March 11, 1953], No. 6693/53. Class 38(5) A switch for controlling an alarm device has a clockwork timing mechanism comprising a setting means and a spring for driving the mechanism, the spring being arranged in the clockwork gear train so as to be connected to the setting means through-gearing. As shown, a spring blade contact carrier 14 is pressed against a fixed contact 7 by a cam 11 when the setting knob 34 is rotated, the knob 34 having a lug 51 co-operable with a lug 10- on a shaft 9 carrying the cam. A gearwheel 12 fast on shaft 9 engages a pinion 18 on a shaft 17 carrying the clockwork spring in a cup 16. A gear wheel 19 connecting the spring to the remainder of the gear train is connected to the shaft 17 by a ratchet-and-pawl mechanism. When released, the spring returns the contacts to the normal "off" position with a delay determined by the gear train. The knob 34, which is returned by its own spring 48, acts as a cover for the switch casing 33.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB669353A GB743206A (en) | 1953-03-11 | 1953-03-11 | Improvements in or relating to clockwork mechanisms for controlling alarm devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB669353A GB743206A (en) | 1953-03-11 | 1953-03-11 | Improvements in or relating to clockwork mechanisms for controlling alarm devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB743206A true GB743206A (en) | 1956-01-11 |
Family
ID=9819082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB669353A Expired GB743206A (en) | 1953-03-11 | 1953-03-11 | Improvements in or relating to clockwork mechanisms for controlling alarm devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB743206A (en) |
-
1953
- 1953-03-11 GB GB669353A patent/GB743206A/en not_active Expired
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