DE565562C

DE565562C - On and off device for speaking machines with electric drive

Info

Publication number: DE565562C
Application number: DE1930565562D
Authority: DE
Original assignee: Heliowatt Werke Elektrizitaet GmbH
Current assignee: Heliowatt Werke Elektrizitaet GmbH
Priority date: 1930-08-14
Filing date: 1930-08-14
Publication date: 1932-12-03

Description

DEUTSCHES REICHGERMAN EMPIRE

AUSGEGEBEN AM 3. DEZEMBER 1932ISSUED ON DECEMBER 3, 1932

REICHSPATENTAMTREICH PATENT OFFICE

PATENTSCHRIFTPATENT LETTERING

KLASSE 42 g GRUPPE 42 g Λ690.30 CLASS 42 g GROUP 42 g Λ690.30

Patentiert im Deutschen Reiche vom 14. August 1930 abPatented in the German Empire on August 14, 1930

Die Erfindung betrifft eine An- und Abstellvorrichtung für Sprechmaschinen mit elektrischem Antrieb und elektrischer Tonabnahme, bei der durch den Tragarm des Tonabnehmers am Ende der Spielstellung das Ausschalten und beim Zurückbewegen in die Anfangsstellung das Einschalten des elektrischen Antriebsmotors bewirkt wird. Gleichzeitig mit dem Ein- und Ausschalten wird in an sich bekannter Weise eine mechanische Bremse für den Plattenteller betätigt. Es ist zwar bekannt, bei elektrischen Sprechmaschinen die Einrichtung'zum Ein- und Ausschalten des Antriebsmotors durch die Drehbewegung des Tonarms zu betätigen. Auch ist schon vorgeschlagen worden, die Schalteinrichtung innerhalb des· Tonarmsockels einzubauen. Im ersten Falle war jedoch bisher eine außerhalb des Tonarm-The invention relates to a placement and placement device for speaking machines electric drive and electric sound pick-up, in which the Switch off and when moving back to the starting position, switch on the electrical Drive motor is effected. Simultaneously with the switching on and off, a mechanical one is activated in a manner known per se Brake operated for the turntable. It is known that in electrical speaking machines the device for inputting and turn off the drive motor by rotating the tonearm. It has also already been proposed that the switching device be located within the tonearm base to be built in. In the first case, however, there was previously an outside of the tonearm

ao sockels angeordnete Schaltvorrichtung für den Antriebsmotor erforderlich. Im zweiten Falle bestand die vom Tonarm zu öffnende und zu schließende Schalteinrichtung aus zwei im Tonarmsockel angeordneten Kontakt-ao socket arranged switching device for the Drive motor required. In the second case, the switching device that could be opened and closed by the tonearm was missing two contact points arranged in the tonearm

as stücken, die bei einer bestimmten Stellung des Tonarms miteinander in Berührung kamen. Da die Bewegung des Tonarms verhältnismäßig langsam erfolgt, ist eine derartige Schalteinrichtung für ein funkenfreies und betriebssicheres Ein- und Abschalten des Betriebsstroms wenig geeignet. Auch muß die etwa vorhandene mechanische Bremsvorrichtung hier außerhalb des Tonarmsockels angeordnet werden.as pieces that are in a certain position of the tonearm came into contact. Since the movement of the tonearm is proportionate takes place slowly, is such a switching device for a spark-free and reliable switching on and off Operating current not very suitable. Any existing mechanical braking device must also can be arranged here outside of the tonearm base.

Gemäß der Erfindung wird nun die innerhalb des Sockels für den Tragarm des Tonabnehmers angeordnete Schalteinrichtung als Kippschalter ausgebildet, so daß ein plötzliches Ein- und Ausschalten des Betriebs· Stroms gewährleistet ist. Die Betätigung dieses Kippschalters erfolgt durch eine im Sockel des Tragarms verschiebbar gelagerte Stange, die unter der Wirkung einer in der Spielanfangsstellung gespannten Feder steht, die durch einen vom Tragarm betätigten Sperrhebel in der Spielendstellung wieder ausgelöst wird. An der verschiebbaren Stange kann in bekannter Weise das Bremskissen zur Stillsetzung des Plattentellers befestigt werden.According to the invention, the inside of the base for the support arm of the pickup is now arranged switching device designed as a toggle switch, so that a sudden Switching the operating power on and off is guaranteed. This toggle switch is operated by an im Base of the support arm slidably mounted rod under the action of a in the Game start position is tensioned spring, which is actuated by one of the support arm The locking lever is triggered again in the end of the game. On the sliding bar the brake pad can be attached in a known manner to stop the turntable will.

Die Zeichnung* zeigt ein Ausführungsbeispiel des Gegenstandes der Erfindung, und zwar Abb. 1 eine Unteransicht des Sockels mit der eingebauten Schalt- und Bremseinrichtung, Abb. 2 eine Draufsicht auf den ganzen Tragarm mit Tonabnehmer und Abb. 3 den Vorderteil der Bremsstange mit den Bremskissen. Der Tragarm 2 ist in dem Sockel ι drehbar gelagert und trägt an seinem innerhalb des Sockels liegenden Ende einen ⁶<J Daumen 7. Durch die Drehung des Tragarmes 2 nach dem Außenrande des Plattentellers um den im Sockel 1 gelagerten Drehpunkt wird durch den Daumen 7 die Bremsstange 4 in die in Abb. 1 dargestellte Lage gebracht. In dieser Lage ist die Feder 8 gespannt und der Sperrhebel 10 unter der Wirkung einer Feder 11 in eine Kerbe derThe drawing * shows an embodiment of the subject matter of the invention, namely Fig. 1 a bottom view of the base with the built-in switching and braking device, Fig. 2 a plan view of the entire support arm with pickup and Fig. 3 the front part of the brake rod with the brake pads . The support arm 2 is ι in the base rotatably mounted and carries at its end lying inside the base end of a ⁶ <J thumb 7. By the rotation of the support arm 2 to the outer edge of the turntable to the stored in the base 1 of rotation is represented by the thumb 7 Brake rod 4 brought into the position shown in Fig. 1. In this position, the spring 8 is stretched and the locking lever 10 under the action of a spring 11 in a notch of the

Claims

Brake rod 4 collapsed. The brake pad 5 is thus withdrawn and the turntable is released. A toggle switch 9 is also attached to the brake rod 4, which in the position shown has closed the contact 13 and has thereby switched on the drive motor. After the end of the play of the plate, the support arm 2 comes into contact with the release lever 3, which lifts the locking lever 10 out of the notch. As a result, the brake rod 4 is moved out of the base 1 by the spring 8 until the pin 12 strikes the wall of the base. As a result, the • 5 brake pad S is pressed against the edge of the plate and at the same time the toggle switch 9 is turned in a manner known per se so that the contact 13 is opened and the drive motor is switched off. As can be seen from FIG. 4, the brake pad S is arranged on an elongated part of the brake rod 4 which is bent up at a right angle and in which it is clamped. This has the advantage that the support arm 2 with the base 1 can be used unchanged at different heights of the turntable. The release lever 3 is arranged on its axis 6, which is connected to the locking lever 10, as can be seen from FIG. The release lever is wound into a helical spring 15 which is placed directly on the axle 6 with such tension that it can be rotated with friction on the axle in order to be able to adjust the release lever beforehand according to the respective plate size. The winding direction of the helical spring 15 is expediently chosen so that the helical spring is tensioned by the movement of the support arm 2, so that the friction between the release lever 3 and the axis 6 is increased at the moment of release. In order to bring about the triggering of the locking lever 10 by the smallest possible movement of the support arm 2, the axis 6 of the release lever 3 on the base 1 with respect to the bearing of the support arm 2 is arranged so that the connecting line of the two pivot points at the moment of triggering approximately with the Axis of the support arm 2 coincides. Patent claims:

1. Positioning and parking device for speaking machines with electric drive and electrical sound pick-up, in which one of the brake pads is supported and slidably mounted in the base of the support arm Rod in the movement of the support arm in the game start position against the action of a spring below Voltage is set and is triggered again by a locking lever actuated by the support arm in the end of play position, characterized by a toggle switch (9) housed in the base (1) on which the displaceable Staqge (4) acts such that the toggle switch (9) in the Game start position in which the spring (8) is tensioned by means of the rod (4), closed ■ and ■ is opened when the game is triggered at the end of the game.

2. Device according to claim 1, characterized by a thumb (7), which tensions the rod (4) when the support arm (2) rotates, so that the toggle switch connected to the rod (4) (9) is moved to the on position. -

3. Apparatus according to claim 1 and following, characterized in that the rod (4) carries a right-angled upward part (Fig. 3) in which a elongated brake pad (5) is attached.

4. Apparatus according to claim 1 and following, characterized in that the release lever (3) is wound at its end to form a helical spring (15, Fig. 1) is, which is pushed onto the axis (6), and that the direction of winding of the helical spring (15) is chosen so that the coil spring (15) is tensioned by the releasing movement of the support arm (2) will.

For this purpose ι sheet of drawings