NO125896B

NO125896B -

Info

Publication number: NO125896B
Application number: NO452768A
Authority: NO
Inventors: M Charveriat
Original assignee: Ugine Kuhlmann
Priority date: 1967-11-15
Filing date: 1968-11-14
Publication date: 1972-11-20
Also published as: DK139416B; BE723985A; DE1808624A1; DK139416C; DE1808624B2; NL6816100A; NL163271B; JPS5036234B1; GB1246306A; FR1551191A; ES360208A1; LU57301A1; SE348764B; CH505214A

Description

Signalanordning. Signal device.

Oppfinnelsen vedrører en signalanordning for telefonapparat eller lignende, hvor det lydfrembringende organ består av et skiveformet anker som svinger under innvirkning av et elektromagnetisk vekselfelt. The invention relates to a signaling device for a telephone set or the like, where the sound-producing body consists of a disk-shaped armature which oscillates under the influence of an alternating electromagnetic field.

Tidligere kjente signalanordninger av denne type er stillingsavhengig ofte vanske-lig å regulere. Dessuten er de vanligvis kost-bare å fremstille, og krever relativt stor plass. Dessuten arbeider de kjente anord-ningene med en av den mekaniske kon-struksjon avhengig frekvens, resp. kan bare anvendes ved en vekselspenning av bestemt frekvens. Hensikten med oppfinnelsen er å tilveiebringe en signalanordning. Anordningen ifølge oppfinnelsen er i det vesent-lige kjennetegnet ved at elektromagnetens jernkrets er utformet som et omkring magnetens kjerne og vikling anordnet hus av magnetisk materiale som har en åpning i kjernens akseretning, og at ankeret som består av en ut for husets åpning anordnet skive ved hjelp av en mellom skiven og huset anbragt fjær elastisk holdes på bestemt avstand fra sistnevnte, idet der videre er anordnet et justeringsorgan for å endre fjærens sammentrykning og svingningens amplitude. Previously known signal devices of this type are often difficult to regulate, depending on the position. Moreover, they are usually inexpensive to produce, and require a relatively large space. In addition, the known devices work with a frequency dependent on the mechanical construction, resp. can only be used with an alternating voltage of a certain frequency. The purpose of the invention is to provide a signaling device. The device according to the invention is essentially characterized by the fact that the iron circuit of the electromagnet is designed as a housing of magnetic material arranged around the magnet's core and winding, which has an opening in the axial direction of the core, and that the armature which consists of a disk arranged outside the opening of the housing by with the help of a spring placed between the disk and the housing, it is held elastically at a certain distance from the latter, as there is also an adjustment device to change the compression of the spring and the amplitude of the oscillation.

Oppfinnelsen forklares nærmere ved hjelp av et utførelseseksempel under hen-visning til tegningen, hvor The invention is explained in more detail by means of an embodiment with reference to the drawing, where

fig. 1 viser et lengdesnitt gjennom anordningen ifølge oppfinnelsen. fig. 1 shows a longitudinal section through the device according to the invention.

Fig. 2 viser anordningen sett ovenfra med ankeret fjernet. Fig. 2 shows the device seen from above with the anchor removed.

I et sylindrisk hus 1 av magnetisk materiale, fortrinnsvis bløtt jern, og som i den ene ende er åpnet, er det konsentrisk anordnet en jernkjerne 2. I rommet mellom kjernen 2 og huset 1 er anbragt en magnet-vikling 3. Et anker 4 som består av en rund skive er anbragt ut for husets åpning og trykkes av en membran 5 mot et skrue-hode 6. Fjærmembranen ligger an mot huset langs omkretsen, og er utskåret på en slik måte at der fremkommer armlignende deler 10, som rager innover fra periferien. Disse delers indre partier ligger an mot skiven. Fjærmembranen 5 er langs omkretsen forsynt med tunger 8; som griper inn i uttak 9 i husets vegg. På grunn av den beskrevne opphengning av ankeret, vil dette når en vekselstrøm går gjennom viklingen 3 utføre en svingebevegelse i jernkjernens akseretning. Ved hjelp av skruen 6 kan luftgapet og således amplituden innstilles, samt følsomhet og lydstyrke endres. Ved at ankeret ved sin svingning kan støte mot huset, kan en variasjon i lydstyrken og klangformen tilveiebringes. In a cylindrical housing 1 of magnetic material, preferably soft iron, and which is open at one end, an iron core 2 is arranged concentrically. In the space between the core 2 and the housing 1, a magnet winding 3 is placed. An armature 4 which consists of a round disk is placed outside the opening of the housing and is pressed by a membrane 5 against a screw head 6. The spring membrane rests against the housing along the circumference, and is cut out in such a way that arm-like parts 10 appear, which project inwards from the periphery. The inner parts of these parts rest against the disc. The spring membrane 5 is provided along the circumference with tongues 8; which engages in outlet 9 in the house's wall. Due to the described suspension of the armature, when an alternating current passes through the winding 3, this will perform a swinging movement in the axial direction of the iron core. With the help of screw 6, the air gap and thus the amplitude can be set, as well as sensitivity and volume can be changed. By the fact that the armature can collide with the house when it swings, a variation in the volume and timbre can be provided.

For å få en lydmaksimumsverdi, må ankeret så kraftig som mulig slå mot huset og tilbakeføres i utgangsposisjon så raskt som mulig. Dette oppnåes når tungenes stilling og lengde i forhold til armene 10 er slik at tungenes ytterste deler, når armene 10 presses ned, av det nedadgående anker In order to obtain a maximum sound value, the anchor must hit the housing as strongly as possible and be returned to the starting position as quickly as possible. This is achieved when the position and length of the tongues in relation to the arms 10 is such that the outermost parts of the tongues, when the arms 10 are pressed down, by the downward anchor

4, dreies i en oppadgående retning, slik at de kommer over huset og derved danner kontakt med det nedadgående anker som derved påvirkes av en ytterligere fjær spen-ning som kaster ankeret tilbake til utgangs-stilling når ankeret ikke lenger er påvirket i nedadgående retning av feltet. Denne ytterligere fjærspenning kommer ikke til å redusere ankerets hastighet i nevneverdig 4, are turned in an upward direction, so that they come over the housing and thereby form contact with the downward-moving anchor which is thereby affected by a further spring tension which throws the anchor back to the starting position when the anchor is no longer influenced in the downward direction by the field. This additional spring tension is not going to reduce the armature's speed appreciably

grad, da armene kan gjøres temmelig bløte, degree, as the arms can be made rather soft,

og da nevnte fjærspenning først påvirker and when said spring tension first affects

ankeret når dette har oppnådd en høy hastighet, og ettersom luftgapet samtidig er the armature when this has reached a high speed, and as the air gap is at the same time

så lite at magnetfeltet nesten er maksi-malt. so small that the magnetic field is almost maximum.

Signalanordningens kompakte kon-struksjon forenkler monteringen, som for The signal device's compact design simplifies installation, as for

eksempel kan skje ved hjelp av en i husets example can happen with the help of one in the house

1 bunn anordnet skrue 7. Membranen 5 kan 1 bottom arranged screw 7. The membrane 5 can

for eksempel erstattes med en tallerken-fjær. for example, is replaced with a disc spring.

Claims

1. Signal device for generation

of sound in telephone sets e. 1., where the sound-producing body consists of a disk-shaped armature oscillating under the influence of an alternating electromagnetic field, the magnetic circuit of the electromagnetic system comprising a housing arranged around the magnet's core and winding, which is open at one end towards the armature in the axial direction of the core, characterized in that the disk-shaped anchor (4) is situated directly opposite the opening of the housing, is freely supported on a center pin and elastically pressed against a fixed stop (6) by means of a spring inserted between the anchor and the housing , whose spring pressure is such that the armature, which is a piston, can oscillate between the edge of the housing and the fixed stop with a frequency dependent on the frequency of the alternating field.

2. Signal device as stated in claim 1, characterized in that the spring consists of an elastic membrane, which is cut out in such a way that arms are formed, which rest against the anchor.

3. Signal device as stated in claim 2, characterized in that the arms of the spring membrane extend from the periphery towards the centre, and rest against the anchor close to its centre.

4. Signal device as specified in claims 2 and 3, characterized in that the arms of the spring membrane are bent upwards from the surface of the membrane, and that tongues (8) extend outwards from the periphery and carry the spring membrane, and are so shaped that , when the arms are pressed together by the anchor, the outermost parts of the tongues are pushed upwards so that they come into contact with the anchor.