BE743691A - - Google Patents
Info
- Publication number
- BE743691A BE743691A BE743691DA BE743691A BE 743691 A BE743691 A BE 743691A BE 743691D A BE743691D A BE 743691DA BE 743691 A BE743691 A BE 743691A
- Authority
- BE
- Belgium
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/16—Actuation by interference with mechanical vibrations in air or other fluid
- G08B13/1609—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems
- G08B13/1618—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means
- G08B13/1627—Actuation by interference with mechanical vibrations in air or other fluid using active vibration detection systems using ultrasonic detection means using Doppler shift detection circuits
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR153337 | 1968-05-29 | ||
| FR182310 | 1968-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE743691A true BE743691A (en) | 1970-05-28 |
Family
ID=26182037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE743691D BE743691A (en) | 1968-05-29 | 1969-12-24 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE743691A (en) |
| DE (1) | DE1927315A1 (en) |
| GB (1) | GB1265027A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0113512B1 (en) * | 1982-12-02 | 1987-04-22 | LUCAS INDUSTRIES public limited company | Motion detection systems |
-
1969
- 1969-05-29 GB GB1265027D patent/GB1265027A/en not_active Expired
- 1969-05-29 DE DE19691927315 patent/DE1927315A1/en active Pending
- 1969-12-24 BE BE743691D patent/BE743691A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1265027A (en) | 1972-03-01 |
| DE1927315A1 (en) | 1970-05-27 |