GB129289A - Improvements in or relating to Time Alarm Devices. - Google Patents
Improvements in or relating to Time Alarm Devices.Info
- Publication number
- GB129289A GB129289A GB16673/19A GB1667319A GB129289A GB 129289 A GB129289 A GB 129289A GB 16673/19 A GB16673/19 A GB 16673/19A GB 1667319 A GB1667319 A GB 1667319A GB 129289 A GB129289 A GB 129289A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gun
- pins
- arm
- bell
- clockwork
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G11/00—Details of sighting or aiming apparatus; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41G—WEAPON SIGHTS; AIMING
- F41G3/00—Aiming or laying means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Electromechanical Clocks (AREA)
Abstract
129,289. Ford, H. C. July 3, 1918, [Convention date]. Time alarms.-A signal is given after an interval slightly less than the time of flight of a projectile from a gun, to warn the spotter or other observer that the moment of impact is at hand. A disk 15, rotated once a minute by clockwork, has a circle' of sixty pins 22, gripped frictionally by a coiled spring 24. When one of the pins 22 is pressed down, as shown in Fig. 5, it eventually tilts a lever 20, which releases the striking mechanism of a mechanical bell or closes an electric bell circuit. At the moment when the gun is fired, a rotatable arm 39, which has previously been set to an angular position corresponding to the range or the elevation of the gun, is depressed so as to push down one of the pins 22, which operates the bell after an interval corresponding to the preliminary setting of the arm 39. The depressed pin is restored to its normal position by a cam 27. The apparatus is mounted in a watertight casing, with external means for winding and starting or stopping the clockwork, for rotating and depressing the setting arm, and for silencing the alarm.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US129289XA | 1918-07-03 | 1918-07-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB129289A true GB129289A (en) | 1919-11-27 |
Family
ID=32391854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16673/19A Expired GB129289A (en) | 1918-07-03 | 1919-07-03 | Improvements in or relating to Time Alarm Devices. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB129289A (en) |
-
1919
- 1919-07-03 GB GB16673/19A patent/GB129289A/en not_active Expired
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