FR2172831A1 - - Google Patents
Info
- Publication number
- FR2172831A1 FR2172831A1 FR7206189A FR7206189A FR2172831A1 FR 2172831 A1 FR2172831 A1 FR 2172831A1 FR 7206189 A FR7206189 A FR 7206189A FR 7206189 A FR7206189 A FR 7206189A FR 2172831 A1 FR2172831 A1 FR 2172831A1
- Authority
- FR
- France
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
- G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7206189A FR2172831B1 (US07696358-20100413-C00002.png) | 1972-02-22 | 1972-02-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7206189A FR2172831B1 (US07696358-20100413-C00002.png) | 1972-02-22 | 1972-02-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2172831A1 true FR2172831A1 (US07696358-20100413-C00002.png) | 1973-10-05 |
| FR2172831B1 FR2172831B1 (US07696358-20100413-C00002.png) | 1974-08-02 |
Family
ID=9094021
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7206189A Expired FR2172831B1 (US07696358-20100413-C00002.png) | 1972-02-22 | 1972-02-22 |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2172831B1 (US07696358-20100413-C00002.png) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR983536A (fr) * | 1949-02-03 | 1951-06-25 | Installation radio-électrique de sécurité | |
| CH406912A (fr) * | 1963-07-20 | 1966-01-31 | George Jefferies John | Installation d'alarme |
| FR1538532A (fr) * | 1967-07-25 | 1968-09-06 | Hughes Aircraft Co | Détection de personnes par infrarouge |
-
1972
- 1972-02-22 FR FR7206189A patent/FR2172831B1/fr not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR983536A (fr) * | 1949-02-03 | 1951-06-25 | Installation radio-électrique de sécurité | |
| CH406912A (fr) * | 1963-07-20 | 1966-01-31 | George Jefferies John | Installation d'alarme |
| FR1538532A (fr) * | 1967-07-25 | 1968-09-06 | Hughes Aircraft Co | Détection de personnes par infrarouge |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2172831B1 (US07696358-20100413-C00002.png) | 1974-08-02 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |