GB190804482A - Improvements in Electrical Alarm Locks. - Google Patents
Improvements in Electrical Alarm Locks.Info
- Publication number
- GB190804482A GB190804482A GB190804482DA GB190804482A GB 190804482 A GB190804482 A GB 190804482A GB 190804482D A GB190804482D A GB 190804482DA GB 190804482 A GB190804482 A GB 190804482A
- Authority
- GB
- United Kingdom
- Prior art keywords
- alarm
- ring
- spindle
- pin
- lever
- 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
Landscapes
- Burglar Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
4482. Themke, L. E. L. Feb. 28. Alarms, burglar, arranged in connexion with door latchmechanism. On the spindle 26 of the latch, is secured a ring 58 which carries a spring lever 63 and is in electrical connexion through the spindle and lock casing with a battery 70 let into the edge of the door. Carried by the knob plug 42 is a ring 67 which is connected by a wire 68 to an alarm. The spring of the lever 63 tends to place it in contact with the ring 67 so that the alarm is rung, but this is normally prevented by a pin 66 which is inserted into the spindle 26 from the outside and presses on the end of the lever. Anyone tampering with the lock from the outside and removing the pin 66 will cause the alarm to ring. The proper key acts in the same way as the pin 66 to stop the alarm.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB190804482T | 1908-02-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190804482A true GB190804482A (en) | 1908-12-03 |
Family
ID=32207787
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB190804482D Expired GB190804482A (en) | 1908-02-28 | 1908-02-28 | Improvements in Electrical Alarm Locks. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190804482A (en) |
-
1908
- 1908-02-28 GB GB190804482D patent/GB190804482A/en not_active Expired
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