GB190517881A - Improvements in Electric Warning Devices for Doors, Lids of Deed-boxes & the like. - Google Patents
Improvements in Electric Warning Devices for Doors, Lids of Deed-boxes & the like.Info
- Publication number
- GB190517881A GB190517881A GB190517881DA GB190517881A GB 190517881 A GB190517881 A GB 190517881A GB 190517881D A GB190517881D A GB 190517881DA GB 190517881 A GB190517881 A GB 190517881A
- Authority
- GB
- United Kingdom
- Prior art keywords
- keyhole
- deed
- lids
- doors
- boxes
- 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)
Abstract
17,881. Roeseke, O. Sept. 4. Alarms, burglar and like.-Relates to means for closing an electric alarm circuit when a key is inserted in the keyhole of a lock for a door or for a deed-box or the like. The end of the key pushes outwards the spring-pressed rod f, which projects into the keyhole, until it bears against the contactspring c, thus closing the electric connexion between the insulated bolt d and the conducting bar a. Closure of the circuit may be prevented by sliding the insulating block e into the position indicated by dotted lines. The whole arrangement may be thrown out of action by pushing the rod f completely out of the keyhole and then turning the pivoted piece b about the bolt d.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB190517881T | 1905-09-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB190517881A true GB190517881A (en) | 1906-01-04 |
Family
ID=32199171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB190517881D Expired GB190517881A (en) | 1905-09-04 | 1905-09-04 | Improvements in Electric Warning Devices for Doors, Lids of Deed-boxes & the like. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB190517881A (en) |
-
1905
- 1905-09-04 GB GB190517881D patent/GB190517881A/en not_active Expired
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