FR923060A - Appareil d'alarme - Google Patents
Appareil d'alarmeInfo
- Publication number
- FR923060A FR923060A FR923060DA FR923060A FR 923060 A FR923060 A FR 923060A FR 923060D A FR923060D A FR 923060DA FR 923060 A FR923060 A FR 923060A
- Authority
- FR
- France
- Prior art keywords
- alarm device
- alarm
- 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
- G08B13/22—Electrical actuation
- G08B13/24—Electrical actuation by interference with electromagnetic field distribution
- G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK923060X | 1945-11-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR923060A true FR923060A (fr) | 1947-06-26 |
Family
ID=8154037
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR923060D Expired FR923060A (fr) | 1945-11-20 | 1946-03-01 | Appareil d'alarme |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR923060A (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2704339A (en) * | 1949-03-19 | 1955-03-15 | Tronics Inc | Capacity operated electronic control circuit |
-
1946
- 1946-03-01 FR FR923060D patent/FR923060A/fr not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2704339A (en) * | 1949-03-19 | 1955-03-15 | Tronics Inc | Capacity operated electronic control circuit |
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