GB182965A - Improvements in and connected with electric burglar alarms - Google Patents
Improvements in and connected with electric burglar alarmsInfo
- Publication number
- GB182965A GB182965A GB1194321A GB1194321A GB182965A GB 182965 A GB182965 A GB 182965A GB 1194321 A GB1194321 A GB 1194321A GB 1194321 A GB1194321 A GB 1194321A GB 182965 A GB182965 A GB 182965A
- Authority
- GB
- United Kingdom
- Prior art keywords
- barrel
- pin
- normally
- burglar
- lock
- 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
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B45/00—Alarm locks
- E05B45/06—Electric alarm locks
Landscapes
- Burglar Alarm Systems (AREA)
Abstract
182,965. Kirk, G. April 26, 1921. Addition to 181,171. Burglar and like alarms.-Locks for use in the burglar-alarm system described in the parent Specification are adapted to open a normally closed circuit when a key is turned therein or if the barrel movement is removed. In one form, Fig. 1, contact between points E, D is normally kept closed by a pin C and is broken if the pin be raised by turning a key in the lock or if the pin falls owing to the barrel being removed. A projection B, Fig. 2, on the back of the barrel C normally makes contact with a piece A insulated from the body of the lock. A slightly different positioning of these latter contacts is also described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1194321A GB182965A (en) | 1921-04-26 | 1921-04-26 | Improvements in and connected with electric burglar alarms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1194321A GB182965A (en) | 1921-04-26 | 1921-04-26 | Improvements in and connected with electric burglar alarms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB182965A true GB182965A (en) | 1922-07-20 |
Family
ID=9995490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1194321A Expired GB182965A (en) | 1921-04-26 | 1921-04-26 | Improvements in and connected with electric burglar alarms |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB182965A (en) |
-
1921
- 1921-04-26 GB GB1194321A patent/GB182965A/en not_active Expired
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