DE73150C - Movement device for typewriter types - Google Patents

Description

IMPERIAL

PATENT OFFICE.

CLASS 15: Printing.

The innovation, which only relates to typewriters with individually movable types, consists in a novel mechanism for moving the types.

The new type movement mechanism is shown in Fig. Ι of the drawing and consists in the following:

A rod 5 can by any means, e.g. B. as drawn, by rack and gear when pressing the key Nj or by lever, briefly moved horizontally in any suitable manner in the direction of the arrow and returns by means of the spring F back to the initial position. The type lever H , which carries the type T and is held in a certain position relative to the rod S by the spring E, is attached to the rod S so that it can rotate about C. The lever H has two arms B ¹ and f? ^2, which cause the lever DAF undergoes a rotation when the one or the other arm against the fixed approaches ^ ¹ and A 'stöfst. ²

Is z. If, for example, the rod S is moved to the right, the arm B ¹ finally meets A ¹ and cannot be shifted any further, while the fulcrum C of the lever H with S advances even further to the right, and a consequence of this is that it moves H rotates around the support point of B ¹ against A ¹ , the type T thus describes a piece of an arc and thus moves in an almost vertical direction towards the printing point D. If the rod S goes back to its starting position by means of the spring F , the spring E ensures that the type T also describes the same arc backwards until H has assumed its starting position at 5 again and then describes a line with S together. Finally, the shoulder A ² meets the arm -B ^{2 of} the lever H. The latter is rotated again, the type T is pressed onto the ink pad K , from which it is removed again by the action of the spring E when the rod S moves to the right takes off.

The approaches that come into contact with one another, respectively. Arms A ¹ and B \ A ' ² and B ² can of course also have surfaces curved in such a way that the movement of type T takes place in any other curve or curve instead of in a circular arc. straight lines takes place, ie it can be, for. B. roll B ' on A ^] so that the type describes a very definite line which is advantageous for the impression, and ideally a line perpendicular to the pressure point.

Instead of the toothed gear, various other drive means can also be used to move the rod S, e.g. B. a corresponding lever mechanism, either by itself or in. Combination with the toothed gear, a resilient wedge, an eccentric, etc. This movement can also be actuated by air pressure, as can be seen from the schematically drawn embodiments in FIGS. 3 and 4.

In the cylinder Z, FIG. 2, the piston K, which is attached to the rod S , moves. The space R is connected to any device (bellows, blower), i.e. it contains air in the compressed state. Will . If the push button N is pressed down, the lower valve V ¹ opens, while the upper one

Claims (2)

Valve V ' ^{2 is} closed. As a result, the air flows into the cylinder Z and drives the piston K, i.e. also the rod S, forwards. If, on the other hand, key N is released, V \ closes while F ^{2 is} opened, air can escape and the piston, driven by spring F , returns to its initial position. Instead of a cylinder with a piston movable therein, a bellows K can also be used to drive S , as FIG. 3 illustrates. The process of pressing a key is the same, except that the bellows base connected to the rod S is pushed back and forth instead of the piston. The fall of the type lever against the paper roller can be used to move the paper carriage in the following way. Each type (Fig. 4, 4 a and 4 b) is, as is also the case with other machines, before it is imprinted , inserted into an annular eye L, which the lever X possesses, and thereby centered. If the type lever H, as Fig. 4 shows, or the type T itself, as illustrated in Fig. 4a, has approaches ZZ, or is a pin M inserted through the type or rod, as can be seen in Fig. 4b, thus, as soon as they touch the eye L before the impression is made, these lugs or pins will produce a rotation of the lever X about its center X ^1. This rotation is used in any, unspecified manner for switching, ie lateral displacement of the paper roller. Depending on the height at which these attachments are made, they will meet the eye L sooner or later, and give the lever X a more or less great rotation. Thereby the circuit can be effected depending on the width of the letters, since each type can produce the appropriate circuit depending on the position of the approaches. Pat ε ν τ claims: ι. Movement device for typewriter types, consisting of a displaceable rod S and a type lever H rotatably connected to it, which, in addition to the displacement carried out at the same time with 5, can still suffer vibrations around its pivot point if its arms B ¹ or B ' ² the fixed lugs A ¹ or Ä * meet, for the purpose, the imprint of the types resp. to effect the absorption of color. 2. In the device marked under 1., the movement of the rod S by compressed air, which is either fed to a cylinder Z by means of a suitable valve or tap device, in which a piston connected to the rod S moves, or fed to a collapsible bellows is, on the movable wall of which the rod 5 is attached. 1 sheet of drawings.