DE221957C - - Google Patents
Info
- Publication number
- DE221957C DE221957C DENDAT221957D DE221957DA DE221957C DE 221957 C DE221957 C DE 221957C DE NDAT221957 D DENDAT221957 D DE NDAT221957D DE 221957D A DE221957D A DE 221957DA DE 221957 C DE221957 C DE 221957C
- Authority
- DE
- Germany
- Prior art keywords
- membrane
- groove
- disc
- edges
- sound waves
- 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.)
- Active
Links
- 239000012528 membrane Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 241000189705 Dunedin group Species 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Soil Working Implements (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE221957C true DE221957C (en:Method) |
Family
ID=482892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT221957D Active DE221957C (en:Method) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE221957C (en:Method) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1115495B (de) * | 1958-11-17 | 1961-10-19 | Lehfeldt & Co G M B H Dr | Vorrichtung zur Erzeugung hochfrequenter mechanischer Schwingungen mittels zweier zylindrischer drehbarer Koerper |
-
0
- DE DENDAT221957D patent/DE221957C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1115495B (de) * | 1958-11-17 | 1961-10-19 | Lehfeldt & Co G M B H Dr | Vorrichtung zur Erzeugung hochfrequenter mechanischer Schwingungen mittels zweier zylindrischer drehbarer Koerper |
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