DE530106C - Device for recording messages by means of a key-controlled type printer with an electromagnetic stepping mechanism that sets the type wheel - Google Patents

Description

GERMAN EMPIRE

ISSUED ASE JULY 21, 1931

REICH PATENT OFFICE

PATENT LETTERING

M 530 CLASS 21a ¹ GROUP

G joioj VIIIaj2i α ^τ Date of publication of the patent grant: g. July

Patented in the German Empire on April 27, 1927

The well-known type printer, for example the Hughes type printer, have Proven for postal purposes. "They are, however, in their structure and also in theirs Operation too complicated to be applied in some other technical fields especially for rough operations such as mines, boilers or ship systems. Often in such cases

ίο little * trained personnel from a remote location Place a specific number of messages to be recorded. Therefor the known type printers would generally not be suitable for the reason given.

The invention relates to a simple and easy to use without special prior knowledge Arrangement for rough operations for recording messages by means of a type printer operated by keys will. According to the invention, a relay interrupter, which when you press each of the Push the type wheel into the working position by means of an electromagnetic stepping mechanism transferred as well as the printing of the type concerned, automatically after the key lock has ended Push magnet and the type wheel into the zero position by means of the same stepping mechanism return.

The circuit parts of the new arrangement can be adequately protected Places are set up so that only the keyboard is arranged at the donor station is. In contrast to the known type printers, it is also possible to switch the receiving apparatus without to combine other operating interventions with any other transmitter keyboard.

In the drawing is the circuit diagram of an embodiment of the new device shown.

For example, four signal keys T ₁ to T _{4 are} provided, by means of which a rotary magnet DvS ″ is controlled, which adjusts switching arms W ₁ to W ₃ arranged on a shaft W. In addition, a test relay P 1 is provided with two windings I and II Release magnet A for the mechanical key lock and a relay interrupter RU are provided. The parts of the printing apparatus that are essential for the circuit are separated from these circuit parts by a dashed line λ ', namely a magnet TM setting the type wheel, a pressure magnet DM and a contact k, which is used for Activation

*) The patent seeker stated as the inventor:

Dipl.-Ing. Hans Stiller in Berlin-Wilmersdorf.

of the relay 5 "is used if the type wheel does not reach the rest position at the same time as the stepping mechanism W. - -

The impact_w.ejse._ of the new facility is as follows:

If, for example, key T _{3 is} pressed, it initially remains mechanically locked until further notice. As a result, the rotary magnet DS receives a current pulse via battery S ₁ , relay interrupter RU, winding DS, contact P ₁ , lines I ₁ , I ₂ , buttons T ₃ , line Z ₃ , back to battery ¹ via earth. The rotary magnet DS thereby switches the shaft W with the switching arms W ₁ to zv _s by one step. This creates a new circuit that runs as follows: B ₁₁ RU, DS, P ₁ , W ₂ , Z ₄ , I ₃ , earth back to B ₁ . Due to the action of the relay interrupter, the circuit described last is repeated again in exactly the same way. During these three steps, the magnet TM setting the type wheel is actuated at the same time, since its winding is parallel or in series with the winding of the rotary magnet DS . The type wheel is at the end of the three steps so that the _{type corresponding to key T 3} is in the print position.

At the end of the third step, the contact arm W _{1 has} reached the contact that is connected to the button T ₃ . This creates the following circuit: Battery B ₂ , winding I of relay P, contact arm W ₁ , button T ₃ , line Z ₃ and via earth back to battery B ₂ . The test relay P thus receives current and opens contact P ₁ , while at the same time it closes the contact ^. By opening the contact P ₁ , the circuit for the rotary magnet DS is interrupted, so that the shaft W and thus the switching arms W ₁ to W ₃ stop in their last position. By closing the contact p ₂ , a circuit for the release magnet A , which runs above ground and is fed from the battery B ₃ , is created, which in a known manner (not shown here ₎ releases the previously mechanically locked key T 3 and also closes the contact α. The activation of the release magnet A also actuates the printing magnet DM, which is parallel or in series with it, so that the _{type corresponding to the key T 3} is now printed. By closing the contact α , the winding II of the test relay P is short-circuited to earth and this results in a delay in the release of this relay. The purpose of this is to maintain the circuit for the release magnet A and the pressure magnet DM until the actuated key returns to its zero position with certainty and the desired character is also printed. With a delay, the relay P drops out, and the contacts P ₁ and P ₂ return to the positions shown.

By renewed contact closure at 'P ₁ , the circuit for the rotary magnet DS is closed again and the shaft W is thus rotated step by step in the same direction by this rotary magnet until the contact arm W ₂ is swept over its contacts. At this moment, all switching arms W ₁ to W ₃ are rotated by 180 ° with respect to the position shown and thus returned to the zero position. The processes take place in exactly the same way if any of the other keys are pressed _{instead of key T 3.} The batteries B ₁ to B ₃ can of course also be replaced by a single common power source.

When explaining the new device, the individual switching operations are essential described as being effected by working current. Instead, it can be known in and of itself Way can also be worked entirely or partially with quiescent current.

Until now it was assumed that the character wheel was in its zero position before the start. In order to have the certainty that the zero position of the type wheel is actually always present as the starting position, a contact k is provided which is only open when the type wheel is in the zero position, but is otherwise always closed. For this purpose z. B. placed an additional disc on the type wheel axle, which has a notch. One of the contact springs of the fixed contact k slides on the disk in such a way that it is only open when its contact spring is in the notch, but otherwise closed. The arrangement is made so that at the moment when the contact spring is in the notch, the type wheel assumes its zero position. If the type wheel is not in the zero position, the winding of the synchronization relay 5 in this circuit is excited _{from the battery S 3} via the contact k, the switching arm W ₃ , line Z ₈ and via earth back to the battery S _{3 and connects the} Contact s with earth. As a result, an auxiliary circuit is closed via earth, battery B _x , relay interrupter RU, types.-radmagnetTM, contact s and earth, through which the character wheel magnet TM is supplied with current pulses through the action of the relay interrupter RU until it enters the 12G character wheel Has transferred zero position and thus the contact k is open again.

With the synchronization device described above, recordings of incorrect characters are avoided in a simple manner. During the stepping process, closing the contact k, as necessary, does not produce the above-mentioned auxiliary circuit for the character wheel magnet DM, because this circuit is interrupted at the switching arm W _3. ίο During normal operation, k opens at the same time as the step-by-step switch arrives in the starting position.

Claims (4)

Patent claims: i. Device for recording messages by means of a button controlled type printer with an electromagnetic setting the type wheel Stepping mechanism, thereby ao indicates that the relay breaker when each key is pressed, it is synchronized with the electromagnetic stepping mechanism the type wheel is transferred from a zero position to the working position, in which the printing of the type in question is initiated and that after a key lock has ceased, it automatically activates the type wheel at the same time as the electromagnetic one Stepping mechanism returns to the zero position and the pressure magnet returns to the rest position. 2. Device according to claim 1, characterized in that the type wheel adjusting magnet (TM) is parallel or in series with the rotary magnet (DS) of the electromagnetic stepping mechanism. 3. Device according to claim 1 or 2, characterized in that the pressure magnet (DM) is connected in parallel or in series with an electromagnet (A) which cancels a mechanical key lock after pressure has been carried out. 4. Device according to claim 1, 2 or 3, characterized in that a shaft contact (k) of the type wheel axle is closed when leaving its zero position, which, if the stepping mechanism (W) previously reaches the zero position again, switches on a synchronizing relay (S), g ₀ which in turn places the indexing magnet (TM) of the type wheel in a special circuit on the relay interrupter (RU). 1 sheet of drawings