BE475404A - - Google Patents
Info
- Publication number
- BE475404A BE475404A BE475404DA BE475404A BE 475404 A BE475404 A BE 475404A BE 475404D A BE475404D A BE 475404DA BE 475404 A BE475404 A BE 475404A
- Authority
- BE
- Belgium
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/30—Time-delay networks
- H03H9/36—Time-delay networks with non-adjustable delay time
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
- Geophysics And Detection Of Objects (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US690863A US2515039A (en) | 1946-08-16 | 1946-08-16 | Transverse wave transmission in liquids |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE475404A true BE475404A (pt) |
Family
ID=24774284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE475404D BE475404A (pt) | 1946-08-16 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2515039A (pt) |
| BE (1) | BE475404A (pt) |
| CH (1) | CH270298A (pt) |
| GB (1) | GB658178A (pt) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE510259A (pt) * | 1951-03-28 | |||
| DE1228683B (de) * | 1961-09-08 | 1966-11-17 | Siemens Ag | Anordnung fuer sehr kurze elektromagnetische Wellen zum Ausgleich der Laufzeitverzerrungen von Hohlleitungen |
| US4187501A (en) * | 1977-10-07 | 1980-02-05 | The United States Of America As Represented By The Secretary Of The Army | Electronic intruder detection system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1799634A (en) * | 1924-11-25 | 1931-04-07 | Western Electric Co | Wave transmission |
| US2147717A (en) * | 1935-12-31 | 1939-02-21 | Bell Telephone Labor Inc | Guided wave transmission |
| US2207845A (en) * | 1938-05-28 | 1940-07-16 | Rca Corp | Propagation of waves in a wave guide |
| US2427348A (en) * | 1941-08-19 | 1947-09-16 | Bell Telephone Labor Inc | Piezoelectric vibrator |
| US2421026A (en) * | 1943-07-08 | 1947-05-27 | Bell Telephone Labor Inc | Delay device |
| US2403214A (en) * | 1944-02-29 | 1946-07-02 | George K Huff | Hydraulic drive |
-
0
- BE BE475404D patent/BE475404A/xx unknown
-
1946
- 1946-08-16 US US690863A patent/US2515039A/en not_active Expired - Lifetime
-
1947
- 1947-06-11 CH CH270298D patent/CH270298A/de unknown
- 1947-08-15 GB GB22767/47A patent/GB658178A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2515039A (en) | 1950-07-11 |
| GB658178A (en) | 1951-10-03 |
| CH270298A (de) | 1950-08-31 |