GB420558A - Improvements in or relating to sound emitting apparatus - Google Patents
Improvements in or relating to sound emitting apparatusInfo
- Publication number
- GB420558A GB420558A GB2769/34A GB276934A GB420558A GB 420558 A GB420558 A GB 420558A GB 2769/34 A GB2769/34 A GB 2769/34A GB 276934 A GB276934 A GB 276934A GB 420558 A GB420558 A GB 420558A
- Authority
- GB
- United Kingdom
- Prior art keywords
- emitter
- tuned
- generator
- capacity
- condenser
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
420,558. Audible-signalling apparatus. NAAMLOOZE VENNOOTSCHAP MACHINERIEEN-EN APPARATEN FABRIEKEN, 30, Croeselaan, Utrecht, Holland. Jan. 26, 1934, No. 2769. Convention date, June 15, 1933. Drawings to Specification. [Class 118 (ii)] The components of the circuit for feeding an underwater or air sound emitter are so dimensioned that the frequency W feeding the oscillatory structure, which is tuned to this frequency W, the inductance L of the emitter and the capacity C of a condenser in shunt with the emitter fulfil the condition W<2>LC = 1. The inductance L and the capacity C are tuned to resonance and a further condenser tuned into resonance with the generator inductivity may be connected in series with the tuned emitter and capacity. The self inductance of the generator may be small compared with that of the emitter, the capacity of the condenser being chosen so that equal currents pass through the condenser and the emitter, the generator then supplying the purely effective current. The generator may be of like phase with the voltage or may be fed with leading current.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE420558X | 1933-06-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB420558A true GB420558A (en) | 1934-12-04 |
Family
ID=6452422
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2769/34A Expired GB420558A (en) | 1933-06-15 | 1934-01-26 | Improvements in or relating to sound emitting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB420558A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE959355C (en) * | 1955-06-15 | 1957-03-07 | Atlas Werke Ag | Method and device for eliminating interference when recording echoes for the purpose of distance measurement using the backscatter method |
-
1934
- 1934-01-26 GB GB2769/34A patent/GB420558A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE959355C (en) * | 1955-06-15 | 1957-03-07 | Atlas Werke Ag | Method and device for eliminating interference when recording echoes for the purpose of distance measurement using the backscatter method |
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