DE229821C

DE229821C -

Info

Publication number: DE229821C
Application number: DENDAT229821D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT««™PATENT OFFICE «« ™

Den Gegenstand der Erfindung bildet eine Vorrichtung zum Anhalten des in Bewegung gesetzten Anschlagwcrkcs für Schreibmaschinen, dessen Bewegung gemäß der Erfindung derart verzögert wird, daß es geräuschlos in die dem Abwärlshube der Tasten entsprechende Endstellung gelangt. Dieser Zweck wird durch die Anordnung eines Knichebclpaares erreicht, das vermittels einer Verbindung mit der Auflagerstange (Universalschiene) die Ausschläge der Tastenhebel, wenn sie niedergedrückt werden, ohne Stoß und Erschütterung aufhält. Dabei kann auch durch die Kniehebelanordnung der. Ausschlag der Tastenhebel geregelt werden.The subject of the invention is a device for stopping the in motion set stop wcrkcs for typewriters, the movement of which according to the invention is such is delayed so that it is noiseless in the end position corresponding to the Abwärlshube of the keys got. This purpose is achieved by arranging a pair of knickerballs that by means of a connection with the support rod (universal rail) the deflections of the Key levers, when depressed, stop without shock and vibration. Included can also be achieved by the toggle lever arrangement of the. The deflection of the key lever can be regulated.

Der Erfmdungsgegcnstand ist auf der Zeichnung dargestellt, und zwar zeigen:
Fig. ι einen Aufriß,The subject of the invention is shown on the drawing, namely show:
Fig. Ι an elevation,

Fig. 2 eine Seitenansicht, teilweise im Schnitt, undFig. 2 is a side view, partly in section, and

Fig. 3 eine Einzelheit.Fig. 3 shows a detail.

Das Gestell der Schreibmaschine besteht aus der Vorderwand 1 und den Seitenwänden 2 und ]. Innerhalb der Seitenwände sitzen, einander gegenüberliegend, die beiden Zapfen 4, 5 mit Körnei'spitzcn zur Lagerung der gemeinsamen Antriebswelle G, von welcher der Vorschubmechanismus des Papicrschlittcns durch Zwischenglieder angetrieben wird. Die Antriebswelle C) ist mit einem Arm 7 versehen; zwischen diesem und dem fest angeordneten Teil 8 liegt eine Zugfeder 9, die die Antriebswelle C) in der Ruhestellung hält und ihre Rückkehr aus der Stellung, in welche sie geschwungen war, unterstützt. Die Welle (> ist an jedem Ende mit einem Paar nach vorn gerichteter Anne 10, Ii versehen, die gelenkig die Stangen 12, 13 ! tragen, welche an ihren unteren Enden die gemeinsame Auflagcrstange (Universalschiene) 14 aufnehmen. Die Stange 14, auf welcher die Tastenhebel 15 in üblicher Weise ruhen, ist mit einer Verstärkungsrippe ΐύ versehen (Fig. 1). Die Tastenhebel 15 ruhen mit ihren hinteren Enden gegen eine Schneide der Schiene 17, treten durch die Vorderwand der Maschine hindurch und liegen zwischen ihren Enden auf einem Polster von verhältnismäßig weichem, schalldämpfendem Material 18, mit dem die Auflagcrstange 14 bedeckt ist. Um die Auflagcrstange 14 zu verhindern, in bezug auf die Tastenhebel seitlich auszuweichen, wenn diese niedergedrückt werden, ist eine Führung vorgesehen, durch welche sie gezwungen wird, sich in einem Bogen zu bewegen, der gleich dem Bogen ist, welcher durch die Teile der mit ihr in Berührung stehenden Tastenhebel beschrieben wird. Diese Führung wird von einem Arm 20 gebildet, der durch Schrauben 21 an dem Maschinengestell befestigt ist. Der Ann 20 besitzt eine Bohrung 22 zur Aufnahme eines gekrümmten Zapfens 24, der von dem miU-leren Teil der Auflagerstange 14 herabhängt. Wenn die Auflagerstange 14 niedergedrückt wird, verhindert der Zapfen 24, der in der Bohrung 22 des Armes 20 geführt ist, jede seitliche Bewegung der Auflagerstange 14 und bewegt, da er gekrümmt ist, diese in'einem Kreisbogen, wie oben erwähnt.The frame of the typewriter consists of the front wall 1 and the side walls 2 and ]. Inside the side walls, opposite one another, sit the two pins 4, 5 with grain tips for mounting the common drive shaft G, from which the feed mechanism of the paper slide is driven by intermediate links. The drive shaft C) is provided with an arm 7; between this and the fixed part 8 is a tension spring 9 which holds the drive shaft C) in the rest position and supports its return from the position in which it was swung. The shaft (> is provided at each end with a pair of forwardly directed arms 10, 11, which articulately support the rods 12, 13! Which at their lower ends receive the common support rod (universal rail) 14. The rod 14 on which the key levers 15 rest in the usual way, is provided with a reinforcing rib ΐύ (Fig. 1) The key levers 15 rest with their rear ends against a cutting edge of the rail 17, pass through the front wall of the machine and lie between their ends on a cushion of relatively soft, sound-absorbing material 18, with which the support rod 14 is covered To move the arc, which is the same as the arc described by the parts of the key levers in contact with it Formed m arm 20 which is fastened by screws 21 to the machine frame. Ann 20 has a bore 22 for receiving a curved pin 24 which depends from the middle part of support rod 14. When the support rod 14 is pressed down, the pin 24, which is guided in the bore 22 of the arm 20, prevents any lateral movement of the support rod 14 and, since it is curved, moves it in an arc of a circle, as mentioned above.

Die Vorrichtung, die zum Aufhalten der Ab-The device used to hold the

Claims

rolling movement of the key lever is used, consists of two toggle lever pairs 25, 2f>; the links, each forming a toggle lever, are rotatably connected to one another at 27. The lower link of each toggle lever is formed from ■ two legs arranged at a distance from one another, which act on both ropes of the associated one of the arms 10, 11 (FIG. 3). One end of each pair of knee brackets is connected at 28 to one of the arms 10 and 11 from which the support rod 14 is suspended, and the other end engages adjustable supports 30, 31 which are screwed into the machine frame (FIG. 2 ). These adjustable supports can be held in any adjusted position by the nuts 32. At each Knichcbelpaar25, 26 engages at any point, e.g. B. '"33, each have a tension spring 34, the other end of which is connected to an associated part 35 which is screwed onto an adjusting screw 36. The latter passes through a projection 37 which is firmly seated on the machine frame. to keep the toggle levers 25, 26 in the bent position (Fig. 2) The springs 34 are therefore tensioned when the support rod 14 is moved downwards by depressing a key lever *. Uni to prevent the toggle levers 25, 26 one after the other Ropes buckle when they are elongated by pressing down the support bar 14, adjustable stops 40 are provided which limit the deflection of the toggle levers when they assume the extended position. These snap-in stops are provided with cushions 41. The mode of operation of the new device is the following: When the key levers are depressed, they result in a downward movement of the support rod; the arms 10 and 11 are articulated with the rods 12, 13 swung downward. This has the consequence that the toggle levers 25, 26, which are held in the bent position by the springs 34, stretch. When the link pairs of each toggle lever have stretched, the support rod 14 has reached the limit of its downward movement. The parts connected to the support ring are stopped without impact or vibration and therefore noiselessly. During this movement, the springs 34 provide a resilient resistance to the stretching of the interconnected links of each toggle lever and also assist in the return of the parts to their rest position shown in FIG. While the support rod 14 is being pressed down, it is guided through the pin 24, which slides in the bore 22 of the arm 20. It can be seen that the movements of the support rod and the parts connected to it are arrested without shock and vibration, and that the device used for this purpose also assists in the return of the parts to their normal positions. The deflection of the key levers can be precisely regulated by adjusting the supports 31 of the fixed pivot pins of the toggle levers. The device used to guide the support rod 14 eliminates friction between the support rod and the key levers. Even if the invention is shown in its application to the support rod of a typewriter, it is not limited to this type of application, but rather can also be used for other moving parts of the typewriter. P Λ T E N T - A N S P R Ü C H E:

1. Device for stopping the stop mechanism set in motion for Typewriters, characterized in that a movable part of the stop mechanism is connected to one link of a pair of toggle levers (25, 26), while the attack other members of the pair on a fixed part each, the Knichcbclpaar (25, 26) each by a spring (34) is usually held kinked.

2. Apparatus according to claim τ, (Ia- • characterized in that the fixed Pivot pin of the toggle lever pair (25,26) on each one adjustable and lockable carrier (31) are provided.

3. Apparatus according to claim 1, wherein the key levers on a common Support rod (14) rest on the arms (10) of a common oscillating Shaft (6) is suspended, characterized in that one link of the pair of toggle levers (25, 26) is attached to one arm each (10) attack the vibrating shaft (6).

4. Apparatus according to claim i, characterized characterized in that each free end of the toggle lever pair (25, 26) engaging Springs (34) on each adjustable one provided on the machine frame Glicde (35) is attached.

5. Apparatus according to claim 1, characterized in that the rash the link of each toggle lever is limited in this way by an adjustable stop (40) will prevent the toggle lever from being pushed through beyond its extended position.

For this purpose 1 flower drawings.