GB398549A - An improved automatic burglar alarm and/or burglary preventive device - Google Patents
An improved automatic burglar alarm and/or burglary preventive deviceInfo
- Publication number
- GB398549A GB398549A GB813432A GB813432A GB398549A GB 398549 A GB398549 A GB 398549A GB 813432 A GB813432 A GB 813432A GB 813432 A GB813432 A GB 813432A GB 398549 A GB398549 A GB 398549A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- broken
- rod
- circuit
- operated
- 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
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/04—Mechanical actuation by breaking of glass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
Abstract
398,549. Automatic burglaralarms. KNIBBS, R. A., 29, Wood End Park Crescent, Hayes End, Middlesex, and JOHNSON, J. F. W., 3, Carlisle Street, Westminster Bridge Road, London. March 18, 1932, No. 8134. [Class 118 (i).] The circuit of a burglar-alarm protecting a shop window D, is automatically closed when fragile, tensioned glass rods 1, 2, 3 having hook-and-eye connections are broken or displaced so as to release the spring-pressed contact 17 of a switch 8. The alarms operated by the circuit may include a combined lamp 23 and siren signal 22 arranged outside the building, and a smoke bomb 24 and a gas bomb 40 within the window. The glass rods 1, 2, 3 may be filled with a deleterious gas which is released when a rod is broken. Time switches and a pilot lamp may be included in the circuits. A rod 1a under the counter may be broken by the assistant's foot in order to operate another switch 8. A third switch 8 near a safe F may be operated by the fracture of a rod 29 due to an intruder stepping on a yielding, floor 26, which is normally held by bell cranks 31. A time switch may delay the action of this switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB813432A GB398549A (en) | 1932-03-18 | 1932-03-18 | An improved automatic burglar alarm and/or burglary preventive device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB813432A GB398549A (en) | 1932-03-18 | 1932-03-18 | An improved automatic burglar alarm and/or burglary preventive device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB398549A true GB398549A (en) | 1933-09-18 |
Family
ID=9846391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB813432A Expired GB398549A (en) | 1932-03-18 | 1932-03-18 | An improved automatic burglar alarm and/or burglary preventive device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB398549A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3109075A (en) * | 1961-07-25 | 1963-10-29 | Peary F Ratcliff | Skier alarm switch |
| CN114718437A (en) * | 2022-03-24 | 2022-07-08 | 江苏玖华云世科技有限公司 | Security protection system of wisdom community |
-
1932
- 1932-03-18 GB GB813432A patent/GB398549A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3109075A (en) * | 1961-07-25 | 1963-10-29 | Peary F Ratcliff | Skier alarm switch |
| CN114718437A (en) * | 2022-03-24 | 2022-07-08 | 江苏玖华云世科技有限公司 | Security protection system of wisdom community |
| CN114718437B (en) * | 2022-03-24 | 2023-09-29 | 江苏玖华云世科技有限公司 | Intelligent community security system |
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