DE338832C

DE338832C - Telephone sound box for dictation phonographs, telephonographs and similar devices

Info

Publication number: DE338832C
Application number: DE1920338832D
Authority: DE
Original assignee: TELEGRAPHON GmbH
Current assignee: TELEGRAPHON GmbH
Priority date: 1920-01-11
Filing date: 1920-01-11
Publication date: 1921-07-06
Also published as: NL9721C; DE340199C; FR527719A

Description

• Die Schallplatte oder Membran bei telephönischen Schalldosen für Diktierphonographen, * Telephonographen und ähnliche Apparate unterliegt bekanntlich verschiedenen B'eänspruchungen, riämlich die dauernde Anziehungskraft des permanenten Magneten biegt die Membran nach den Polen hin durch; ferner -bewirkt der Druck, mit dem sich der Schreibstift in der Ruhe gegen die Walze• The phonograph record or membrane in the case of telephonics Sound boxes for dictation phonographs, telephonographs and the like Apparatus is known to be subject to various demands, spatially the permanent one The attraction of the permanent magnet bends the membrane towards the poles; in addition, the pressure with which the pen is at rest against the roller causes it

ίο stützt, durch den angehängten Schreibhebelmechanismus einen entgegengesetzten Zug auf die Membran; außerdem üben die durch die elektrischen Ströme hervorgerufenen mechanischen Schwingungen der" Membran eine ständig wechselnde Beanspruchung· aus, unid schließlich wirkt noch !der Trägheitsstoß der infolge der Stromstöße entsteht. Dem Zusammenwirken aller dieser Beanspruchungen ist die Nachgiebigkeit der Mem-ίο supports, through the attached writing lever mechanism an opposite pull on the membrane; also practice those created by the electrical currents mechanical vibrations of the "membrane a constantly changing stress, Finally, unid is still effective! the moment of inertia that occurs as a result of the current surges. The interaction of all these stresses is dependent on the compliance of the mem-

ao bran auf die Dauer nicht gewachsen, und es tritt eine bleibende Formänderung ein, die gewöhnlich mit »Meister« bezeichnet wird. Infolge dieser Meisterbildung treten in den Schwingungen der Membran Resonanzen auf, die die Wirkungsweise der Schalldose bis zur gänzlichen Unbrauchbarkeit beeinträchtigen. Der Gegenstand der Erfindung bildet nun eine Schalldose, bei der diese Übelstände dadurch beseitigt sind, daß die Membran durch einen vor den Magnetpolen gelagerten Anker ersetzt ist, der in gewöhnlicher Weise mit den Schreibhebelenden gekuppelt ist. Das Ersetzen der Membran durch einen Anker bringt aber noch andere Vorteile mit sich, die je nach der Lagerung des Ankers erreicht werden. Insbesondere kann der Anker auf eine ganz bestimmte Eigenschwingung abgestimmt werden, wodurch bei Anwendung des Diktier·- oder Telephonographen als Aufnahmeapparat in. der drahtlosen Telegraphic eine Abstimmung auf einen ganz bestimmten Sender möglich ist. Weitere Vorteile gehen aus det Beschreibung 'eines Ausführungsbeispiels, das in der Fig. I in der Seitenansicht und in der Fig. 2 in¹ der Vorderansicht dargestellt i^t, hervor. .ao bran has not grown in the long run, and a permanent change in shape occurs, which is usually referred to as "master". As a result of this master's training, resonances occur in the vibrations of the membrane, which impair the functioning of the sound box to the point of total uselessness. The object of the invention now forms a sound box in which these inconveniences are eliminated in that the membrane is replaced by an armature mounted in front of the magnetic poles and coupled in the usual way to the ends of the writing lever. Replacing the membrane with an anchor also has other advantages, which are achieved depending on the mounting of the anchor. In particular, the armature can be tuned to a very specific natural oscillation, so that, when the dictation or telephonograph is used as a recording device in the wireless telegraph, tuning to a very specific transmitter is possible. Further advantages emerge from the description of an exemplary embodiment which is shown in the side view in FIG. ^{1 and} the front view in FIG. 2 in FIG. .

Das kräftige permanente Magnetsystem ι trägt an seinen Polen 2 die Elektromagnet-, spulen 3; die von den Stromsdhwingungen durchflossen werden. Vor den Polen 2 ist der Anker 4 angeordnet und zur Erzielung, der beabsichtigten Wirkung besonders eigenartig gelagert. Die Lagerung des Ankers 4. ist nach Art eines Balkens auf zwei Stützen; mit Belastung durch eine Einzellast ausgebildet. Dabei können beide Stützen gleich oder verschieden ausgeführt sein; wesentlich" ist es, daß der Anker, der durch die Magnetkraft als Einzellast durchgebogen wird, in' möglichst kleiner Entfernung von den" Magnetpolen 2 gehalten wird. Wie Fig. 2 beispielsweise^ zeigt, ist der Anker 4 auf der einen Seite* bei 5 wie ein Hebel drehbar gelagert; am anderen Ende ist eine mehr oder. weniger nachgiebige Zunge 6 am Anker angesetzt, die sich auf ein Widerlager 7 stützt. Dadurch soll erreicht werden, daß die Hebel-, wirkung des Ankers, wie beispielsweise-bei einem Relais oder einem elektrischen Wecker,; nicht zur Wirkung kommt, sondern dör An-; ker lediglich Schwingungen infolge seinerThe strong permanent magnet system ι carries on its poles 2 the electromagnet, coils 3; that of the current oscillations are flowed through. In front of the poles 2, the armature 4 is arranged and to achieve particularly peculiar to the intended effect. The storage of the anchor 4. is like a beam on two supports; formed with loading by a point load. Both supports can be the same or be designed differently; essential" it is that the armature, which is deflected by the magnetic force as a point load, is in ' The smallest possible distance from the "magnetic poles 2" is kept. As in FIG. 2, for example ^ shows, the armature 4 is rotatably mounted on one side * at 5 like a lever; at the other end is one more or. less flexible tongue 6 attached to the anchor, which is based on an abutment 7. This is to ensure that the lever, effect of the anchor, such as -at a relay or an electric alarm clock; does not come into effect, but rather an on; ker only vibrations as a result of it

Claims

Flexibility like a beam can perform on two supports. For this reason, ¹ can the pivot bearing 5, similar to the other side, can be replaced by an abutment 7, only has the pivot bearing has the advantage that it suppresses transverse rotations of the armature to its longitudinal direction.

The pivot bearing 5 is provided on a bracket 16, on which the armature 4 is held between two pointed screws 17. The abutment 7 consists of a cutting edge or tip 18, against which you see the end of the Tongue 6 lays. To the anchor 4 at a greater or lesser distance from the To be able to adjust magnetic poles 2, the cutting edge or tip 18 has an adjustment device, which can be carried out in any way. As can be seen from Fig. 2, can, for example, the tip 18 with its lower shaft more or less in, the Bock 19 are screwed in, whereby the distance between the armature 4 and the Poland 2 is changed.

The writing lever system is transverse to the anchor 4 arranged and consists in a known manner of a lever mounted on the bracket 8 9, which serves to record the fluctuations of the phonograph cylinder. With this Lever, the actual writing lever 10 is articulated at 11. On the one The pen 12 sits at the end, while a pull rod 13 engages at the other end, which mediates the coupling of the writing lever 10 with the armature 4. The rod 13 is hinged at 14 on the armature 4 as close as possible to the point of application of the magnetic force. To store the entire sound box, the bracket 15 is attached to the slide to move it the sound box along the roller, because of its' well-known design is not shown.

The operation of the armature is such that it bends due to the magnetic attraction force like a beam on two supports with a single branch. Since the magnetic force is predominantly stronger than the pull of the attached writing lift system, the pressure exerted by the attached writing lever can be ignored. As a result of the magnetic force, the armature experiences deflections which change as a result of the current oscillations that excite the electromagnet and which are transferred to the writing lever system, the pen writing the recorded characters into the phonograph cylinder. To increase the sensitivity, the abutment 7 is to be set in such a way that the distance ^{1 of} the armature 4 from the magnetic poles 2 is as small as possible, without a. To have to fear sticking.

In order to regulate the deflection of the armature in a very specific relationship to the current oscillations, the tongue 6 is to be selected to be more or less flexible. For the reception of speech currents, an anchor with a natural frequency is expediently used, which is far above the number of vibrations occurring in speech. At the same time, the best possible damping of the armature must be provided in order to flatten the resonance curve. For the recording of radio telegraphic characters, it is advantageous to tune the armature to a very specific natural frequency by a corresponding springing of the tongue 6 so that current oscillations of other frequencies cannot occur in a disruptive manner and only oscillations of the same frequency are recorded. This provides a means of tuning the telephonograph, which serves as a receiving device, to a very specific transmitter, so that only the characters given by it are recorded on the roller.

In order to tune the armature 4 to a very specific frequency, various Funds are applied. It is useful to have the sound boxes for a certain Carry out frequency range from the outset and fine-tune it within the given limits Induce adjustment. The sound box can be used for a larger frequency range To make it, the tongue 6 can have a corresponding elastic strength either by its thickness or by its width received, or at the abutment 7, the cutting edge or tip 18 by a Surface to be replaced. Finer adjustments can be achieved through adjustment of the abutment 7 in such a way that the armature 4 more or less approximates the poles 2 with the effect that the damping is changed by the magnetic field. If required, other damping means known per se can also be used, ! For example mechanical ones that immediately dampen the movements of the armature. By lengthening or shortening the anchor as a result of lateral displacement of the Abutment 7, for what purpose the block 19 with a laterally shifting Adjusting device is to be provided, its natural frequency can also be changed.

PATEIfT-AiTSBUCHE:

i. Telephone sound box for dictation phonographs, Telephbnographs and similar apparatus, characterized in that that the writing lever system (9, 10)

instead of a diaphragm with one excited by the electromagnet (i, 2, 3) rod-shaped anchor (4) is coupled.

2. Sound box according to claim 1, characterized in that the armature (4) across the. Writing lever system (9, 10) arranged is.

3. Sound box according to claim 1, characterized in that the armature (4) in front of the magnetic poles (2) at both ends against the attraction of the magnet (1) and between them Bearing points (at 14) as close as possible to the point of application of the magnetic force the writing lever system (9,10) is coupled.

4. Sound box according to claim 3, characterized characterized in that the armature (4) at one end by means of a pivot bearing (5) and at its other end by means of an abutment (7), against the the armature (4) is supported by a more or less flexible tongue (6), is supported.

S-sound box according to claim 1, characterized characterized that the armature (4) on a certain - natural oscillation ab ^ - is similar, so that foreign vibrations are not transferred to the pen will.

For this purpose ι sheet of drawings.