DE317779C - - Google Patents
Info
- Publication number
- DE317779C DE317779C DENDAT317779D DE317779DA DE317779C DE 317779 C DE317779 C DE 317779C DE NDAT317779 D DENDAT317779 D DE NDAT317779D DE 317779D A DE317779D A DE 317779DA DE 317779 C DE317779 C DE 317779C
- Authority
- DE
- Germany
- Prior art keywords
- pole
- membrane
- magnet
- irons
- resistance
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 12
- 235000000396 iron Nutrition 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 230000004907 flux Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Description
Um bei Telephonen, wie sie beispielsweise für Unterwasser-Schallsignalanlagen in Betracht kommen, Verluste durch Fluxänderungen im erregenden Magneten zu vermeiden, wird gemaß der Erfindung die Anordnung so getroffen, daß die Poleisen von dem erregenden Magneten durch einen magnetischen Widerstand, z. B. einen Luftraum, getrennt sind, der wesentlich größer ist als der magnetische Widerstand, derTo be considered for telephones, such as those used for underwater sound signal systems come to avoid losses due to flux changes in the exciting magnet, is measured the invention made the arrangement so that the pole iron from the exciting magnet by a magnetic resistance, e.g. B. an airspace, are separated, which is essential is greater than the magnetic resistance that
ίο die Poleisen voneinander und von der Membran trennt.ίο the pole irons from each other and from the membrane separates.
Die Anordnung kann beispielsweise so getroffen werden, wie es in der Zeichnung schematisch dargestellt ist. 2VS ist der erregende Magnet, der ein permanenter Magnet oder ein Elektromagnet sein kann, p1 und p2 sind die beiden Poleisen; m ist die Membran, die durch einen kleinen Luftzwischenraum von den Poleisen getrennt ist. Bei α bilden die Poleisen und die Ansätze b, c einen magnetischen Nebenschluß, dessen Widerstand durch Einstellen des Luftzwischenraumes oder durch Einschalten eines anderen magnetischen Widerstandes zweckmäßig so abgeglichen wird, daß er ungefähr dieselbe Größe hat wie der Widerstand zwischen den Poleisen und der Membran. Der magnetische Widerstand zwischen den Poleisen und dem Magneten wird wesentlich größer gemacht als die Widerstände zwischen den beiden Poleisen bzw. den Poleisen und der Membran.The arrangement can be made, for example, as shown schematically in the drawing. 2VS is the exciting magnet, which can be a permanent magnet or an electromagnet, p 1 and p 2 are the two pole pieces; m is the membrane that is separated from the pole irons by a small air gap. At α , the pole iron and the lugs b, c form a magnetic shunt, the resistance of which is suitably balanced by adjusting the air gap or by switching on another magnetic resistance so that it is approximately the same size as the resistance between the pole iron and the membrane. The magnetic resistance between the pole iron and the magnet is made much greater than the resistance between the two pole irons or the pole irons and the membrane.
Die Wirkung dieser Anordnung ist die, daß die Fluxänderungen, die in den Poleisen auftreten, sich praktisch im Poleisen selbst ausgleichen und ohne nennenswerten Einfluß bleiben auf den Flux im erregenden Magneten. Es werden infolgedessen die Energieverluste vermieden, die andernfalls durch Wirbelströme in einem Stahlmagneten oder durch Induktionswirkungen in einem Elektromagneten auftreten können.The effect of this arrangement is that the flux changes which occur in the pole irons practically equalize themselves in the pole iron and remain without any significant influence on the flux in the exciting magnet. As a result, the energy losses that would otherwise be caused by eddy currents are avoided occur in a steel magnet or by induction effects in an electromagnet can.
Claims (1)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE317779C true DE317779C (en) |
Family
ID=570413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT317779D Active DE317779C (en) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE317779C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1040605B (en) * | 1954-11-08 | 1958-10-09 | Goodmans Ind Ltd | Sound playback device, in particular dynamic loudspeakers or the like. |
-
0
- DE DENDAT317779D patent/DE317779C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1040605B (en) * | 1954-11-08 | 1958-10-09 | Goodmans Ind Ltd | Sound playback device, in particular dynamic loudspeakers or the like. |
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