DE120405C - - Google Patents
Info
- Publication number
- DE120405C DE120405C DENDAT120405D DE120405DA DE120405C DE 120405 C DE120405 C DE 120405C DE NDAT120405 D DENDAT120405 D DE NDAT120405D DE 120405D A DE120405D A DE 120405DA DE 120405 C DE120405 C DE 120405C
- Authority
- DE
- Germany
- Prior art keywords
- switch
- sound
- microphones
- tone
- determining
- 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
- 239000004927 clay Substances 0.000 claims 2
- 241000380131 Ammophila arenaria Species 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)
- Locating Faults (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE120405C true DE120405C (OSRAM) |
Family
ID=389470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT120405D Active DE120405C (OSRAM) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE120405C (OSRAM) |
-
0
- DE DENDAT120405D patent/DE120405C/de active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE275426C (OSRAM) | ||
| DE204554C (OSRAM) | ||
| DE816707C (de) | Schaltungsanordnung fuer Doppelbetriebswaehler in Fernmeldeanlagen, insbesondere Fernschreibanlagen | |
| DE42268C (de) | Neuerungen an telegraphischen Apparaten | |
| DE2205988C2 (de) | Alarmsignalerzeuger | |
| DE211532C (OSRAM) | ||
| DE181293C (OSRAM) | ||
| DE95543C (OSRAM) | ||
| DE19761C (de) | Neuerungen an tragbaren telephonischen Apparaten | |
| DE426441C (de) | Einrichtung zum Tasten, insbesondere fuer drahtlose Telegraphie | |
| DE28968C (de) | Umschalter für telephonische Apparate und andere Zwecke | |
| DE174786C (OSRAM) | ||
| DE191919C (OSRAM) | ||
| DE282025C (OSRAM) | ||
| DE10021C (de) | Neuerungen an Telephonen | |
| DE18435C (de) | Neuerungen an Telephonen | |
| DE506170C (de) | Einrichtung zur UEbermittlung von Befehlen, Signalen o. dgl., insbesondere fuer die Zwecke der Feuerleitung | |
| DE292325C (OSRAM) | ||
| DE17544C (de) | Neuerungen an Apparaten für tele- j phonische und telegraphische Zwecke | |
| DE225019C (OSRAM) | ||
| DE312589C (OSRAM) | ||
| DE673200C (de) | Boersenkursmeldeanlage | |
| DE21444C (de) | Neuerungen an Fernsprechapparaten und Fernsprechsystemen | |
| DE596041C (de) | Telegraphenanlage, insbesondere mit Waehlerbetrieb, bei der die Anker der zur UEbertragung der Telegraphierzeichen verwendeten Relais (z. B. polarisierte Relais) zwei Ruhelagen besitzen | |
| DE185145C (OSRAM) |