SU58881A1 - Device for moving the tape holder in Adler system typewriters - Google Patents

Description

The Adler tape holder mechanism has a number of flaws, which include, firstly, not always the visibility of the written, because the tape holder fork is very wide (50 mm) and therefore the tape in most cases folds back in the curved center. the position from hitting the letter, if the tape is currently not stretched between two coils, which happens in most cases; this curvature of the tape is just opposite the printed mark and thus closes it at the moment when the writer would like to ascertain which mark was printed last, and therefore you have to bend the tape with your fingers; secondly, due to the overwhelming number of typewriters, for which a narrow tape of 12 mm is required, the harvesting enterprises produce mostly narrow tape and, due to the insignificance of its use, pay little attention to the wide tape and often cannot be obtained on the market , which puts Adler in great difficulty with the typewriter; thirdly, the use of a wide ribbon is more expensive than if the same work was done on a narrow belt, since here, two side strips, with a total complexity of 8 mm, are triggered, with 24 mm width tape i.e., the ЗЗ / total area of the tape, and in a narrow tape, the response, with the same performance, reaches 660/0 of the total area of the tape, which generally yields significant savings when using a narrow tape.

The proposed device serves to eliminate the above disadvantages; the first drawback, i.e., the closure of the written, is eliminated by the mechanism of the present invention, in which the ordinary standard narrow tape of 12 mm does not fold back as before, but drops down 4 mm below the written and only at the moment of approximation of the letter rises to the roller upwards to obtain an impression. Thus, the visibility of what is written is complete and never compromised, as in the previous system, while the other two deficiencies are eliminated by the presence of a mechanism for a narrow ribbon.

In FIG. 1 shows the existing tape holder mechanism; FIG. 2 shows a modified mechanism according to the invention; FIG. 3-view of the mechanism from the front.

As can be seen from the drawing, a change in the existing mechanism is that: 1) the fork-holder 5 and the upper arm of the lever 9 are removed; 2) in the lower part of the plank 10 of the upper guide 2 is extended, giving it the shape shown in fig. 3 and indicated by the number 13; 3) the tape holder 14, by means of its bends 21 and 22, is put on the bar 13 in its corresponding cuts, along which it slides freely up and down; 4) to bring the tape holder 14 back and forth up and down, depending on pressing the keys, a bracket 15 is attached to the lower part of the bar with rivets 2b, on which is installed the rocker arm 17 swinging on the axis 16 and connected for 19 seconds The arc 7 in the machine. Lastly, when each key is pressed, it goes down and thus, through the pull 19, lowers the right shoulder and raises the left shoulder of the rocker arm 17, on top of which a bar 27 is installed, which can rotate on axis 18. This bar 27 with its front end passes through the cutout 24 of the tape holder 14 having the shape of the letter L. Lifting along with the beam 17, the strip 27 lifts and the tape holder 14 with the tape on it to the set height so that the upper and second row of letters 11 come against the tape; Thus, when printing the upper and second rows of letter 11, the ribbon is raised and lowered, the letters of the upper row are printed through the upper half of the tape, and the second row of letters are printed through the lower half of the tape, and, as will be seen later, the print of the lower third A number of characters (digits, punctuation marks, etc.) are also produced through the lower half of the tape. As is known, the lower third series of characters printed when pressing the second register is used most rarely with respect to the two upper rows, and the second register is usually delayed when typing one or several characters, and after its release from pressing the carriage with roller 4 becomes into place

The first p yes signs, where the writing is visible. In accordance with this, the proposed device does not provide for further lowering of the tape below the third row of characters, since the visibility of their imprint occurs when releasing the second register from pressing, but, on the contrary, it is intended to stop lifting the tape up at the moment of the sign imprint, because is against the tape. This is done as follows: the bar 27, mounted on the upper part of the rocker arms 17, is shifted to the right and left by the lever 20 swinging on the axis 26 fixed on the appendage 25 of the bracket. 15. The lever 20 by the upper end passes through the hole in the yoke 17, and the lower end through the hole of the lever 8, which is on the machine and swings right and left from pressing the second register. When typing the third row of characters, when the second register is pressed, the lever 8 moves to the left, and the lever 20, the upper end of which deflects the bar 27, which, when the front end is raised upward, goes along the vertical notch 24, pulls the holder 14 down. motionless.

The subject matter of the invention.

Claims (2)

1. A device for moving the tape holder in the Adler system's writing masks, characterized by the use of a swinging bar 27, passing through the short portion of the L-shaped notch 24 of the tape holder 14 in order to lift and lower the latter when printed with the upper two. supplying the top or bottom of the colorful ribbon. 2. The form for making the device according to claim 1, characterized in that the lever 20, the lower horse, is used to stop the lifting of the tape holder when printing with the third lower row of letters 11; which passes through the lever 8, swinging when the second register is pressed, and the upper end is passed through the bar 27 to push it to the side and to insert the cutout 24 in the vertical part so that the tape holder remains stationary.