DE634422C - Permanent magnet for loudspeakers with freely oscillating armature - Google Patents

Permanent magnet for loudspeakers with freely oscillating armature

Info

Publication number
DE634422C
DE634422C DEG81017D DEG0081017D DE634422C DE 634422 C DE634422 C DE 634422C DE G81017 D DEG81017 D DE G81017D DE G0081017 D DEG0081017 D DE G0081017D DE 634422 C DE634422 C DE 634422C
Authority
DE
Germany
Prior art keywords
loudspeakers
magnet
permanent magnet
armature
freely oscillating
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
Application number
DEG81017D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HERRMANN GRAU METALLWARENFABRI
Original Assignee
HERRMANN GRAU METALLWARENFABRI
Publication date
Priority to DEG81017D priority Critical patent/DE634422C/en
Application granted granted Critical
Publication of DE634422C publication Critical patent/DE634422C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R11/00Transducers of moving-armature or moving-core type

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

Die Erfindung bezieht sich auf einen permanenten Magneten für Lautsprecher mit frei schwingendem Anker. Der Zweck der Erfindung ist, einen Magneten zu schaffen, S xder für einen frei schwingenden außenliegenden Anker ein kräftiges Magnetfeld erzeugt und der leicht herzustellen ist. ' jThe invention relates to a permanent magnet for speakers with free swinging anchor. The purpose of the invention is to create a magnet S x which generates a strong magnetic field for a freely oscillating external armature and which is easy to manufacture. 'j

Gemäß der Erfindung sind die Schenkelenden des hufeisenförmigen Magneten schräg gegeneinandergebogen und die dem frei schwingenden außenliegenden Anker gegenüberliegenden Stirnflächen des Magneten zur Bildung der Polflächen und eines scharfkantigen begrenzten Luftspaltes abgeschliffen. Es ■ 15 wird auf diese Weise ein von den abgeschliffenen Flächen ausgehendes bogenförmiges Magnetfeld geschaffen, das vor dem Luftspalt liegt \md in welchem sich das Ende des frei schwingenden Ankers bewegt. Infolge dieser Form des Magnetfeldes braucht das Ende des frei schwingenden Ankers nicht mehr so nahe an die Schenkelenden des permanenten Magneten herangerückt zu werden, wie es sonst bei bekannten Ausführungen notwendig war, wo sich in dem engen Zwischenraum zwischen Ankerende und dem permanenten Magneten Ansammlungen von Staub und anderen Fremdkörpern bilden konnten, die dann eine Hemmung und schädliche Beeinflussung der Ankerbewegung bedingten. Die Erfindung ist auf der Zeichnung beispielsweise dargestellt, und zwar zeigt:According to the invention, the leg ends of the horseshoe-shaped magnet are inclined bent against each other and the one opposite the freely swinging outer armature The end faces of the magnet are ground to form the pole faces and a sharp-edged, limited air gap. It In this way, 15 becomes an arc-shaped one emanating from the ground surfaces Magnetic field created that lies in front of the air gap in which the end of the freely swinging armature moves. As a result of this form of the magnetic field, this is necessary The end of the free-swinging anchor is no longer so close to the leg ends of the permanent one Magnets to be moved, as is otherwise the case with known designs was necessary where in the narrow space between the anchor end and the permanent Magnets could form accumulations of dust and other foreign objects, which then inhibit and harmful Influencing the anchor movement conditional. The invention is shown in the drawing, for example shown, namely shows:

Abb. ι eine Ansicht des Magnetsystems in schematischer Darstellung. Abb. 2 ist eine Draufsicht der Abb. 1.Fig. Ι a view of the magnet system in a schematic representation. FIG. 2 is a top plan view of FIG. 1.

Abb. 3 zeigt schematisch die Form des von den Magnetschenkelenden ausgehenden Magnetfeldes.Fig. 3 shows schematically the shape of the starting from the magnet leg ends Magnetic field.

Wie die Abb. 1 zeigt, sind die Enden 3 der beiden Schenkel 1,2 eines hufeisenförmigen Magneten schräg gegeneinandergebogen. Zur Bildung der Polflächen 5 und eines scharfkantigen begrenzten Luftspaltes 4 werden die Stirnflächen des Magneten abgeschliffen. Das Magnetfeld des permanenten Magneten hat dann ungefähr die Form, wie es in der Abb. 3 veranschaulicht ist. Innerhalb dieses Magnetfeldes vor den Polflächen 5 und dem Luftspalt 4 schwingt der Anker 6, der bei 7 an einem geeigneten Träger 8 eingespannt ist. 'Mit 9 ist die den Anker umgebende Sprechstromspule bezeichnet, während 10 das Verbindungsglied zwischen dem Anker 6 und der Membran 11 des Lautsprechers darstellt. Ein Schraubenbolzen 12 durchdringt, wie die Abb. 1 und 2 zeigen, die beiden Schenkel r,2 des permanenten Magneten. Durch entsprechende Einstellung der Muttern 13 auf diesem Schraubenbolzen ist eine Einstellung des Luftspaltes möglich, indem die Schenkel 1,2 mehr oder weniger gegeneinandergebogen werden können.As Fig. 1 shows, the ends 3 of the two legs 1, 2 are of a horseshoe-shaped one Magnets bent towards each other at an angle. To form the pole faces 5 and a sharp-edged limited air gap 4 the end faces of the magnet are ground off. The magnetic field of the permanent The magnet then has approximately the shape as illustrated in Fig. 3. Within this magnetic field in front of the pole faces 5 and the air gap 4, the armature 6, which is clamped at 7 on a suitable carrier 8, oscillates. 'At 9 she is the one Armature surrounding voice current coil denotes, while 10 the connecting link between represents the armature 6 and the membrane 11 of the loudspeaker. A screw bolt 12 penetrates, as Figs. 1 and 2 show, the two legs r, 2 of the permanent Magnets. By setting the nuts 13 on this screw bolt accordingly an adjustment of the air gap is possible by the legs 1,2 more or less can be bent against each other.

Claims (1)

Patentanspruch: g5 Claim: g 5 Permanenter Magnet für Lautsprecher mit frei schwingendem Anker, dadurch gekennzeichnet, daß die Schenkelenden* *" des hufeisenförmigen Magneten schräg gegeneinandergebogen sind und die dem frei schwingenden außenliegenden Anker gegenüberliegenden Stirnflächen des Magneten, zur Bildung der Polflachen und eines scharfkantigen begrenzten Luftspaltes, abgeschliffen sind.Permanent magnet for loudspeakers with freely swinging armature, thereby marked that the leg ends * * " of the horseshoe-shaped magnet are bent diagonally against each other and the freely oscillating outer armature opposite end faces of the magnet, to form the pole faces and a sharp-edged limited air gap, are ground off. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DEG81017D Permanent magnet for loudspeakers with freely oscillating armature Expired DE634422C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEG81017D DE634422C (en) Permanent magnet for loudspeakers with freely oscillating armature

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG81017D DE634422C (en) Permanent magnet for loudspeakers with freely oscillating armature

Publications (1)

Publication Number Publication Date
DE634422C true DE634422C (en) 1936-08-27

Family

ID=7137229

Family Applications (1)

Application Number Title Priority Date Filing Date
DEG81017D Expired DE634422C (en) Permanent magnet for loudspeakers with freely oscillating armature

Country Status (1)

Country Link
DE (1) DE634422C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128537A (en) * 1958-06-26 1964-04-14 Vigren Sten Daniel Manufacture of electromagnetic devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3128537A (en) * 1958-06-26 1964-04-14 Vigren Sten Daniel Manufacture of electromagnetic devices

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