DE265418C

DE265418C -

Info

Publication number: DE265418C
Application number: DENDAT265418D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

265418 KLASSE 15gv GRUPPE265418 CLASS 15gv GROUP

Zusatz zum Patent 220672.Addendum to patent 220672.

Patentiert im Deutschen Reiche vom 31. Mai 1912 ab. Längste Dauer: 23. Februar 1924. Patented in the German Empire on May 31, 1912. Longest duration: February 23, 1924.

Durch das Patent 220672 ist eine elektrische Schreib- oder Prägemaschine geschützt, bei welcher die Tastenhebelenden beim Anschlag der Tasten auf beständig umlaufende Kontakte treffen und dadurch einen Elektromagneten erregen, welcher die der niedergedrückten Taste entsprechende Type einer umlaufenden Typenscheibe gegen die Papierwalze oder gegen ein als Matrize für einen herzustellenden Schriftsatz dienendes Bleiprisma zum Anschlag bringt. Das Wesen der durch das Hauptpatent geschützten Erfindung besteht im besonderen in der Ausbildung der Kontakte als federnde Zungen, wobei zwecks Regelung der Kontaktzeit entweder die Zungen gegenüber den Tastenhebelenden eingestellt oder aber der Tastenhebelhub verändert werden können. Bei dem Gegenstande des Hauptpatentes kann es vorkommen, daß die federnden Kontaktzungen bei größerer Umlaufsgeschwindigkeit in starke Schwingungen geraten bzw. ihre Form verändern, so daß Stromschlüsse an der unrichtigen Stelle auftreten. Die gegen diesen Ubelstand getroffene Maßnähme, die Zungen in entsprechender Materialstärke auszubilden, hat ein stoßweises, die * Schreibschnelligkeit ungünstig beeinflussendes Auftreffen der Kontakte auf die Tastenhebelenden zur Folge.An electric typewriter or embossing machine is protected by patent 220672, at which the key lever ends when the keys are pressed against continuously rotating contacts hit and thereby excite an electromagnet, which that of the depressed Key corresponding type of a revolving type disk against the paper roller or against a die for a to be produced Brings pleading serving lead prism to the stop. The essence of the Main patent protected invention consists in particular in the formation of the contacts as resilient tongues, with either the tongues opposite in order to regulate the contact time the key lever ends can be set or the key lever stroke can be changed. With the subject of the main patent it can happen that the resilient contact tongues at higher rotational speed get into strong vibrations or change their shape, so that current connections occur at the wrong place. The measures taken against this Ubelstand, the tongues in the appropriate material thickness to train, has an intermittent, the * the writing speed unfavorably influencing Impact of the contacts on the key lever ends result.

Gemäß vorliegender Erfindung sollen diese Nachteile dadurch beseitigt werden, daß die Kontakte entweder als um zur Kontraktträgerachse parallele Achsen schwingbare Hebel aus45 According to the present invention, these disadvantages are to be eliminated in that the contacts are either as levers from 45, which can be pivoted about axes parallel to the axis of the contract carrier

gebildet sind, die zweckmäßig hochkantig angeordnet werden und, gegen zu weites Ausschwingen bei rascher Umdrehung des Kontaktträgers entsprechend abgestützt sind, oder es sind auf dem Kontaktzylinder daumenartige Scheiben oder Vorsprünge als Kontaktglieder aufgesetzt, welche mit an den Tastenhebelenden befestigten federnden Kontaktzungen zusammenwirken, die zwecks Regelung der Kontaktzeit einstellbar sind.are formed, which are expediently arranged upright and against swinging too far are supported accordingly with rapid rotation of the contact carrier, or there are thumb-like on the contact cylinder Discs or projections placed as contact members, which with the key lever ends attached resilient contact tongues cooperate for the purpose of regulation the contact time are adjustable.

Auf der Zeichnung ist eine solche verbesserte elektrische Schreibmaschine in einem Ausführungsbeispiel veranschaulicht, und zwar zeigt Fig. ι die Schreibmaschine im Längsschnitt,In the drawing, such an improved electric typewriter is in one embodiment illustrates, namely Fig. ι shows the typewriter in longitudinal section,

Fig. 2 die Anordnung eines Kontakthebels und die Sperrvorrichtung für die Tastenhebel undFig. 2 shows the arrangement of a contact lever and the locking device for the button lever and

Fig. 3 eine andere Ausführungsform der Kontaktvorrichtung.3 shows another embodiment of the contact device.

Die Schreibmaschine besteht, wie in dem Hauptpatent 220672 veranschaulicht, aus zwei an sich bekannten, beständig umlaufenden, wagerecht angeordneten Kontaktzylindern i, an deren Umfang eine Anzahl abstehende metallene, gleich lange Kontakthebel 2 vorge^ sehen sind, die in gleichen Abständen in einer über beide Kontaktzylinder verlaufenden eingängigen Schraubenlinie angeordnet sind, und gegen welche beim Niederdrücken der Tastenhebel 3 deren aufrechte, unter der Längsachse der Kontaktzylinder 1 liegende Fortsätze 4 treffen und einen Stromkreis über den Elektromagneten 5 schließen, der mittels des federn-As illustrated in main patent 220672, the typewriter consists of two known per se, constantly rotating, horizontally arranged contact cylinders i, on the circumference of a number of protruding metal, equally long contact levers 2 vorge ^ can be seen, the catchy at equal intervals in a running over both contact cylinders Helical line are arranged, and against which when the key lever is depressed 3 their upright extensions 4 lying below the longitudinal axis of the contact cylinder 1 meet and close a circuit via the electromagnet 5, which by means of the spring

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Claims

the armature 6 and its extension 7 brings the lever-like type carrier 8 corresponding to the struck key to the stop against the paper roller 9 or against a lead prism serving as a die for a document to be produced. According to the invention, the contact levers 2 (Fig. 2) are mounted on the contact cylinders ι attached bearing stands 10 about horizontal axes 11 and are pressed either by springs 12 or by the action of centrifugal force when the contact cylinder 1 is rotated outwards, with one against the shorter end of the contact lever 2 acting adjustable stop 13 holds the contact lever 2 in its position. The contact levers 2 are also arranged upright, so that bending of the same is as good as impossible and an accurate and reliable contact effect appears to be guaranteed. According to FIG. 3, the contact cylinder 1 carries thumb-like projections 14 instead of the contact lever 2, while resilient contact tongues 15 are attached to the upper side of the key lever ends 31 and can be adjusted as required by adjusting screws 16. In this embodiment, the noise that occurs when the contacts are closed is completely eliminated. Behind the contact cylinders 1 are parallel to these two rollers or shafts 17 are mounted, which are rotated by means of the intermediate wheels 18 (Fig. 1) in the same direction and at the same speed as the associated contact cylinder 1 and to the extent with the number of contact levers 2 each Contact cylinder 1 corresponding disks 19 are occupied, which are cut out on a part of their circumference, which cutouts lie below one another in a helical line. The thumb disks 19 are so over the rear ends 20 of the key lever 3 that the lifting of the key lever ends and their upright extensions 4 is only possible when the cutout of the associated disc 19 is above the key lever end. In this way, the contact between the button lever and the contact lever can only be established when the latter has assumed the most favorable position for it. On the other hand, contacts that act for too long and the possibility of jamming between the contact levers 2 and the corresponding extensions 4 of the key levers are avoided. According to FIG. 2, the thumb shaft 171 does not act directly on the key lever ends, but rather on bolts 21 which are longitudinally displaceable against spring action and engage over the key lever ends 20 and whose upright extensions 22 interact with corresponding thumbs 191 of the shaft 171. In order to eliminate the phenomenon, which is unusual for the writer, of encountering a resistance when the key is pressed down due to the locked key lever, the keys 23 are placed on the levers carrying them so as to be movable against spring action 24. Sponsorship τ claims:

1. Electric typewriter or embossing machine, in which the key lever ends When the buttons are pressed, they hit continuously rotating contacts and thereby excite an electromagnet which causes the the type corresponding to the pressed key against a rotating type disk the paper roller or against a serving as a matrix for a document to be produced Brings lead prism to the stop, according to Patent 220672, characterized in that they are designed as resilient tongues Contact members either as on the rotatable contact carrier (cylinder, disc) around parallel to its axis of rotation arranged axes swingable, spring-loaded levers (2) provided are or on those with thumb-like projections (14) of the rotatable contact carrier cooperating key lever ends are attached.

2. Machine according to claim 1, characterized in that the spring action standing lever (2) against adjustable stops (13) of the rotatable contact carrier (1) and thus against centrifugal force as a result of the rotary movement of the Contact carrier are kept secured in their position.

^{3. Machine according to claim 1, characterized in that a thumb shaft (17 or 17 1} ) rotating with it in the same sense and at the same speed is mounted on the key lever ends (20) parallel to the axis of rotation of the contact cylinder (1), the thumb of which ( 19 or 19 ¹ ) either lock the key lever ends or act on resilient, the key lever ends overlapping locking bolt (21), such that the movement of the key lever only at a certain position of each contact lever (2) relative to the associated stop (4) of the key lever can be done.

1 sheet of drawings.