DE116428C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The present invention relates to a device for automatically reversing motion of the ribbon on typewriters, which when the ribbon is completely unwound comes into action. The drive of this device is carried out by one to each of the Lever belonging to the reels, which is pressed resiliently against the ribbon winding. the ribbon is prevented from becoming loose during unwinding and at the moment where the last turn comes to unwind, to the spool hub applies and the reversing movement device is influenced in such a way that the just become empty The spool is rotated to take up the ribbon again.

The drawing shows the new device on a bar lock machine, namely

in Fig. ι in rear view,

2 and 3 in side views according to the arrow directions 2 indicated in FIG. 1 and 3.

Are rotatably mounted on a fixed Placed healing E by means of screw D ² fixed switching plate D carries in a known manner in projections D ¹ stored a shaft C at the ends of the particular for engagement with the toothed reel flanges gears C ^{2 is} fixed, while in the central part defined by a resilient pawl A ¹ from the carrier A of the ribbon guide when you hit the keys B ^l moving ratchet C ¹ sits. ^{A resilient plate C 3} attached to the changeover plate also engages in this ratchet wheel in a known manner. ■ *

To engage with the gears C ² , the flanges F ^{1 of} the ribbon reels F are toothed accordingly and the latter sit themselves on the pins F ² fastened in the stationary frame.

The switching device consists of a lever arrangement, which is special for each coil is arranged.

Each lever arrangement consists of a lever G, which is ^{rotatably attached at G 1} and, with the intermediation of a spring G ² supported against its lower part, resistant to the reel hub BEZW. the ribbon wrapping is pressed. This lever G is equipped with a nose G ³ , which is intended to press against the extension H of a second lever H ^B when the lever G is in a suitable position. Each lever H ^s is rotatable about pin H ¹ and, in addition to the extension H ^{which interacts with the nose G 3 of} the lever G, is also provided with two arms, one of which is attached to the spool pin F ^{2 by} means of a spring H ² , while the other is H. ^s protrudes under a lateral approach D ^{4 of} the adjusting plate D. These levers H? are the actual control levers which, when moved by lever G, automatically move the plate D over.

Lever J, one of which is arranged with the relevant lever H ^s on its pivot pin H ¹ , are used to fix the plate D which is in each case engaged by the lever H ^s. Each lever J is equipped with a stepped hook-shaped extension J ¹ (see Fig. 1), which is in one in the upper part

3rd edition, issued on October 26th .)

Claims (1)

The ^{cutout D 3} provided for the setting plate D is intended to be snapped into place, which takes place in the released position of this lever as a result of being overweight by simply tipping it over. A second lateral paragraph J ^{2 of} each of the levers J lies in the path of the nose G ³ of the relevant lever G, while an extension J ³ protrudes under the already mentioned approach D ^{4 of} the adjusting plate D and at the same time with the relevant arm H ^{3 of} the 'adjusting lever serves to adjust the setting plate. The locking levers J are provided with handles J ^{4 in} order to be able to switch over or rearrange the plate at will. When the lever G is pressed by the increase in the ribbon winding against the action of its spring outward (see. Fig. 2), his nose G ³ presses against the corresponding approach H of the Umschalt- BEZW. Adjusting lever H ³ , which the latter is rotated downwards about its pin against the action of its spring H ² , so that its arm H ^s serving to rotate the adjusting plate D is moved away from the extension D ^{4 of} the plate, ie is brought out of action. On the other hand, on the empty sink (Fig. 3), the lever G has reached the reel hub, its nose G ³ has released the corresponding approach H of the lever H ^s , which, left to the action of its spring if ² , tilts upwards and, with his arm Tf ³ grasping the extension D ^{4 of} the adjusting plate D , the same adjusted in such a way that the gear C ² disengaged from the empty bobbin is brought into engagement with the same. In the latter case (Fig. 3) the nose G ^{3 of} the lever G pushes against the approach J ^{2 of} the associated locking lever J at the same time, whereby the hook J ^{1 is} lifted from the cutout D ^{3 of} the adjusting plate D to the same of the action of the lever H. ³ release. In this new position, the setting plate is determined by the other locking lever / which, when the lever G is moved outward on the other side (FIG. 2), tilts forwards completely free, following its gravity, so that its hook J ^{1 is} in the cutout D ^{3 of} the adjusting plate D snaps into place. In order to be able to reverse the direction of movement of the ribbon by hand if necessary, each of the levers J is equipped with a handle J ⁴ , on which it, when tilted backwards, releases the setting plate with its hook J ¹ , which on the other hand is released by the one on the same Lever J located · extension J ³ at their approach £) ^{4 is} detected and so changed. Godfather νϊ-Αν saying: Reverse movement device for the ink ribbon in typewriters, characterized in that a against the hub of each ribbon spool resiliently pressed lever (G) during the unwinding of the ink ribbon a during the winding of the latter entrained by means of a thumb (G ³⁾ extension (H) of an actuating lever (HH ³⁾ releases, -which the latter, turned upwards by a spring (H ² ) , with his arm (H ³ ) grasps the shoulder- shaped extension (D *) of a conversion plate (D) and tilts it over as soon as the lever (G) is unwinding the last turn of the ribbon by running onto the spool core with his thumb (G ³ ) triggers the lever (JJ ¹ to J ⁴ ) holding the changeover plate (D) locked. 1 sheet of drawings.