DE234801C - - Google Patents

Description

IMPERIAL

PATENT OFFICE,

PATENT LETTERING

- M 234801 CLASS 21 a. GROUP

and with stenographers.

Patented in the German Empire on April 20, 1909.

The subject of the invention forms a dictation telephone device, which consists of two Transmitter stations and any number of receiver stations, so-called stenograph stations, of which a part can optionally be connected to the two encoder stations, while another Part of the stenograph stations only in connection with one of the two transmitter stations

ίο can be brought. The line between all stations are designed according to the three-wire system.

Dictation telephones of this type are known per se; also the application the three-wire system in these facilities is no longer new. The subject of the The present invention is the improvement of these facilities and the elimination of the causes of malfunctions that emerged from the known devices in the company to have.

This was particularly the case with the connection between the two encoder stations then faults occur if the call happened to be made from both stations at the same time. These disturbances are avoided according to the invention in that by flipping of switches for calling the transmitter stations to one another from the three connecting lines two circuits can be established, with the call batteries belonging to each donor station in these two Electric circuits do not have common conductors (outer conductors). When making the Speech circuits, however, the same lines are switched in such a way that one of the Talk batteries of the donor stations, like this one for the operation of the microphones of the stations is desired, turned off and the other talk battery in a known manner in the Center conductor of the speech circuits is laid. Also the call and the speaking between the donor stations and the stenograph stations was in the previously known dictation telephones thereby exposed to disturbances that an already existing between a donor station and a dialing station Connection could be influenced and disturbed when calling the same dialing station from the other donor station. Around To avoid these inconveniences, each stenograph selection station has a switch which contains four contacts. In this switch there is one conductor of the three-wire system each donor station is interrupted when the dialing stations are not used, while after the Calling these dialing stations and flipping the switch always completely follows the three-wire system leading to the one transmitter station closed and at the same time a second conductor in the one after the other donor station leading three-wire system is interrupted. With this circuit there is also a busy signal connected so that a bell located in each donor station in the respective interrupted three-wire system remains at rest when the latter is connected Donor station that is already connected to the other donor

station calls connected stenograph dialing station. On the other hand, this bell gives the Transmitter station the character transmitted to the called dialing station again, if this dialing station free is.

On the accompanying drawing, FIGS. Ι and ia represent the circuit diagram of a Telephone dictation device according to the present invention, both figures are

ίο to think interrelated. In the drawing, A ' and A ² denote two encoder locations. The dial stenograph stations B ' and B ² are set up in such a way that they can be optionally connected to one of the two transmitter stations. The remaining stenograph stations C, C ² , C ^Z , C ⁴ can only be connected to a single donor station. Of course, any number of stenograph stations of any kind can be present in a dictation device. The stations shown in the drawings are only intended to illustrate the essence of the present invention.

Each donor station has a plug, lever or the like.

Devices through which the connection with one of the stenographers' stations assigned to it alone or with the stenograph selection stations common to both donor stations or finally with the other Donor station can be produced by yourself. The one for use in the telephone dictation system incoming telephone set can be of any type. On the stenograph stations shown in the drawing is with 10 the transmitter device, with 11 the receiver device, with 12 the switch hook in the usual way Execution and denoted by 13 the call bell.

At the transmitter station A ' , 14' represents the transmitter device, 15 'and 16' two telephone receivers, of which 15 'shows a receiver in the usual design, while 16' denotes a very sensitive so-called loud-speaking device. 17 'represents the bell for the call to the donor station A' , which is connected to a panel flap in the usual way. The donor station A ² has the same facilities as A '. The plugs or levers on the donor station A ' have the characters D' E 'F' H ' ; they are all connected to the corresponding display flaps d 'e' fg 'h' . With 23 or 24 and the corresponding reference numerals, the speech or call batteries of the donor stations are designated; 25 'and 25 ^s represent the switches on the corresponding transmitter stations, through which the loudspeaker receiver is switched into the speech circuit.

. The drawing shows the circuit diagram of the device when the same is not used. Now wishes z. B. the donor station A ' to transmit a dictation to the receiving station C , the lever G' is turned over on the donor station in such a way that the elongated tongue 30 is raised slightly. This creates a wake-up circuit which is powered by battery 24 'via lines VI ² , tongues 31 and 30, line P, bell 13 of stenograph station C, switch hook 12, line I *, tongues 32 and 33, lines V>, I ^s , P runs back to battery 24 '. In this way, the stenograph station C is informed that a connection with her is requested, whereupon the receiver of this station is picked up by the switch hook 12.

At the same time, the lever G 'is now turned over at the transmitter station A' in such a way that the contact between the tongues 30 and 31 is interrupted and the tongues 32, 35, 36 and 37 are pressed down. This creates two separate speech circuits between the transmitter station A ' and the stenograph station C , namely in one of these speech circuits the current runs from the transmitter 14' of the transmitter station A ' via the line m', the tongues 39 and 37, the lines ot ² , ot ³ , Ot ⁴ , speech battery 23 ', lines Ot ⁵ , Ot ⁶ , tongues 40 and 32, line / ⁴ to the switch hook 12 of the stenograph station C and via the contact tongues 42 and 43, the receiver 11, the line ot ⁷ , Tongues 36 and 44, the lines ot ⁸ , ot ⁹ to the transmitter 14 'of station A' back. The transmitter of station A ', the receiver of the stenograph station, the speech battery and the lines Z ⁴ , ot ⁷ connecting the two stations are located in this circuit.

The second speech circuit is established from the stenograph station C to the donor station A ' in the following way: The current runs from the transmitter 10 of the stenograph station via line P, the tongues 45 and 35, lines n', n ² to the receiver 15 'of station A ' Or in another position of the switch 25' to the loud speaking device 16 'and from here. from via the speech battery 23 ', the lines m ⁵ , ot ⁶ , the springs 40 and 32, the line fi back to the switch hook 12 and through the spring 42 to the transmitter 10 of the stenograph station. The transmitter 10 of the stenograph station C, the receiver 15 'or 16' of the transmitter station A ' and the speech battery 23' are located in this circuit. The two stations are connected to one another by the lines P, P.

If the stenograph station C wishes to call station 4 ', this can happen when the circuits on the transmitter station A' are in the position shown in FIG. As a result, when the receiver is removed, the stenograph station is disengaged from the hook 12

Kontaktzungeri 54 and 55 of the switch K ', j further through the line ft ⁱ , m ⁷ back to the tongues 36 and 44 of the switch E ', the lines m ^a , m ° back to the transmitter 14 'of the station A' .

The second circuit from the dialing station B ' to the transmitter station A' has the following course: The current runs from the transmitter 10 of the dialing station via the branch ft 'of the line ^ ³ to the contact tongues 52 and 53 of the switch K', also via ft ² and the line I ³ leading to the transmitter station to the tongues 45 and 35 of the switch E ' located on this station, the lines n', n ² to the receiver 15 'and 16 ¹ , via the speech battery 23', the lines m ^& , m ⁶ , the springs 40 and 32 of the switch E ', the line / ⁴ back to the switch hook 12 and through the springs 42 to the transmitter 10 of the dialing station. If the dialing station B ' wishes to call the transmitter station A' , the lever K 'is moved to the left, whereupon the call takes place as follows after picking up the receiver in the manner described above: The current runs from the battery 24' via the lines V, 0 ' to the display flap β' and via the line o ² , the tongues 47 and 36 of the switch E ', the line m ¹ , the branch f *, the mutually contacting tongues 55 and 54 of the switch K', the branch ft ^{3 of} the line m ¹ , to the listener 11 of the dialing station B ' and here via the tongues 43 and 42, switch hook 12, via the line Z ¹ back to the springs 32 and 33 of the switch E' of the transmitter station A ' and through the lines / ⁵ , ^ ⁶ , P back to battery 24 '. In this way the indicator flap e ' falls on the station A' and indicates that a connection is requested by the dialing station.

As can be seen from the circuit, the transmitter station A ² can call the dialing station B ' in the same way by means of its lever E ^2. It is also possible for the transmitter station A ' to call the dialing station B ² in the manner described above by means of the lever F' . The connection between the donor station A ² and the dialing station B ² takes place analogously by means of the switch -F ^{2 of} this donor station. It can be seen that in the central position of the switch K ' or K ² on the dialing station, which contains four contacts, one conductor (m ⁷ ) of the three-conductor system connecting the stations, coming from each transmitter station, is interrupted. When the switch K ' is thrown, this third conductor is also closed for the calling station, while a second conductor (I ^s ) leading to the non-calling station is interrupted. In this way, the non-calling station is only connected to the busy dialing station by means of a conductor l ^l and can therefore not transmit any characters to this dialing station as long as it is busy.

From the donor stations A , signals are given to the dialing stations B as agreed, so that the stenographer of the dialing station knows from which sending station he is being called. The stenographer sets then the gear lever K to the left or right depending on the prearranged signal of the station A 'or A' ¹ sounds. If an occupied dialing station is called by the free donor station, a busy signal is transmitted to the calling donor station. For this purpose, the lines 57 emanating from the upper spring of the switch levers E ', F', E ² , F ² are not, like the corresponding lines of the switch levers G, H ', G ² , H ^2, for the connection with the fixed stenographs. Stations C, C ² , C ³ and C ^{4 are connected} directly to the wire V , but with the interposition of the bells X ' and X ² . As soon as the dialing station called is free, these bells sound in the transmitter station itself in the same signal that is transmitted from the transmitter station to the dialing station. The circuit contains z. B. for the call of station B ' from A ^{2 the} following lines:

Tongues 30, 31 of the go switch Z? ² connected to each other. The current runs analogously, as described for the call from B ' by station A' , via the bell X ² , the battery 24 ² , the contact blades 30. 31 to the line V ^, further to the same named line in FIG. 1 via the bell 13, hook 12, lines I ³ , ft ' in direction 51 to tongue 58 and then into line I ³ leading back to station A ² , which is connected to switch E ² . If the listener is hung up at B ' an-ioo, both bells X ² and 13 will sound, otherwise neither of them will sound, namely when B' is busy.

Finally, the individual donor stations A can call each other and get in touch with each other. The shift levers D ' and D ^{2 of} the transmitter stations and the lines q', q ² , q ³ are used for this purpose . If z. B. to put the transmitter station A ' with the station A ² in connection, a contact between the tongues 60' and 61 'and 62 and 63 is established by the switch lever D' and a current path is opened that runs as follows: From the call battery 24 'via line V, tongues 61' and 60 ', lines r' and q ' to station A ^z and here via tongues 65 and 66, signal flap d ² , lines r ² and q ² back to station A' and here via the tongues 62 and 63 and the lines I ⁶ and V to the call battery 24 'back.

Conversely, a call to station A '

The following circuit is established: From battery 24 'via lines L' 0 ' to display flap g' and via line o ² , tongues 47 and 36, line m ⁷ to receiver 11 of stenograph station C ' and here via tongues 43, 42 and switch hook 12 via the line l' ¹ back to the springs 32 and 33 of the transmitter station A ' and through the lines I ⁵ , l ^& , Γ back to the battery 24'. In this way the indicator flap on station A ' falls, indicating that a connection with that station is requested. At the same time, when the display flap g ' falls, a circuit is closed via the bell 17', a circuit breaker, a resistor, the battery 24 'and the line P , which calls attention to the call by the bell 17' ringing.

The connection between the donor stations A ' and A ² with the stenograph stations C ² or C ³ and C ⁴ is established by means of the levers JJ' or G ² and H ² in the same way as with the connection of the stations A ' and C.

The stenograph stations B ' and B ² are dialing stations and can be connected to each of the donor stations A' and A ² . Each of these stations carries a switch Jv 'or Ji ² , which assumes the position shown in the drawing when the apparatus is in the rest position. In this position the station can accept signals from both transmitter stations. Desires z. B. the donor station A 'to get in touch with the stenograph station B' , the lever E ' is moved on the donor station in the same way as previously described for lever G' . It can be seen from the drawing that the lines P and m ^{1 of} the dialing station B ' are interrupted at points 50 and 51, in contrast to the lines of the stenograph station C. The two ends p 'p' ^{2 of} the wire 1 ^{ä of} the station A ' are led to the switching springs 52 and 53, which are in contact with one another in the rest position of the switch Jv'.

Likewise, the wire I ^s leading from the station A ² to the switch K 'is connected to the switching springs 58 and 59, which also form a contact in the rest position of the switch K'. In the same way, the ends ■ p ³ , p ^l of the interrupted line m ⁷ coming from the station A 'are led to the springs 54 and 55, which are not in contact with one another when the lever K' is in the rest position.

The wire m ¹ coming from the station A ² runs in an analogous manner to the switch tongue 60, which does not touch the opposite switch tongue 61 when the switch K 'is in the rest position.

The switching tongues 52 and 59 on the one hand and 61 and 54 on the other hand are with one another conductively connected.

In the rest position of the switch K 'thus is the choice station B' both by the non 'out lines / ⁴ as well as by the by the switch K' to the switch K p afferent branch 'of the dividing line l ^a over the contact tongues 52, 53 or 58, 59 and the part of the line / ³ leading to the two transmitter stations A ' and A ² with both transmitter stations in connection. The third lines m ^{1 of} the three-wire system, on the other hand, are open between the switching tongues 54, 55 and 60, 61 of the switch Jv '.

As soon as the wake-up circuit is established from the transmitter station A ' to the dialing station B' by switching the tongues 30 and 31 of the switching device E ' by means of the lines I ^s , l' ¹ , the wake-up signal sounds at the stenograph station B '.

The course of the current is as follows, corresponding to the previously described call to station C from station A ' : From battery 24' via lines V, signal bell X ', line 57, tongues 31 and 30 of switching device E', line P, branch p ² , switch tongues 53 and 52 of switch Jv ', go branch p' of line I ³ running in dialing station B ' , bell 13, switch hook 12, line Z ⁴ , tongues 32 and 33 of switching device E', lines I ⁵ , 1 ⁶ , I ¹ back to battery 24.

After receiving the symbol, the receiver is removed from the hook at the dialing station B ' and the lever K' is moved to the left (FIG. 1). As a result, the line ηι ^{Ί of} the station A 'is closed by means of the springs 54 and 55 and at the same time the line l ^z leading to the station A ^{2 is opened} by removing the springs 58 and 59 from one another.

The connection of the speech circuits between the two stations takes place in exactly the same way as was previously described for the connection between stations A ' and C , for this purpose at the transmitter station A' after removing the tongues 30 and 31 of the Switch E ' the tongues 32, 35, 36 and 37 of this switch are depressed. The two speech circuits that are thereby formed are as follows: The current of the first circuit runs from the transmitter 14 'of the transmitter station A' via the line m ', the tongues 39 and 37 of the switch E', the lines m ² , m ^s , m *, speech battery 23 ', lines m ⁵ , m ^e , tongues 40 and 32 of switch E ¹ , line i ⁴ to switch hook 12 of dialing station B' and via contact tongues 42, 43, receiver 11, line m ⁷ , Branch p ³ ,

on the part of the station A ² after turning the tongues 60 'and 61' and 62 and 63 of the lever Z) ² instead in the following way: From the call battery 24 ^{s of} the station A ² , the current runs over the line V of this station, the Tongues 61 'and 60' of switch D ² , lines r ' and q ^s to station A' and here via tongues 70, signal flap d ', line q ² back to station A ² and here via tongues 62 and 63 of the switch Z) ² and the lines I ⁶ , V to the call battery 24 ^s back. It can therefore be seen that with this call circuit the common conductor q ² (central conductor) is battery-free, while the two call batteries are located in the external conductors q ' and q ^z . This avoids the disturbances that occur with other switching types in which a single call battery is arranged in the center conductor, which occur when both transmitter stations happen to call each other at the same time.

After the call, the two transmitter stations are connected to one another in that the tongues 68, 69, 70, 71 and 65, 72, 73, 74 are pressed down by the switch levers D ' and D ^2. This creates the following speech circuit from station A ' to station A ² : From the transmitter 14' the current flows through the line m !, the tongues 75 and 71, the line q ² to the station ^ ² and here through the tongues 76 and 72, the line s', the receiver device 15 ² or 16 ² , the battery 23 ² , the line s ² , the tongues 78 and 65, the line q ' back to the donor station A' and here through the tongues 68 and 79 and the line m ⁹ to the transmitter 14 'back. The transmitter of station A ', the receiver of station A ² and a speech battery 23 ² are located in this circuit, while the lines q \ and q ^{2 establish} the connection between the two stations.

In a very similar way, a circuit is closed in which the transmitter of station A ² and the receiver of station A 'are located. The current flows from the battery 23 ^s over, the line t ³ to the contact tongue 74 of the switch Z) ² , further over the contact tongue 80, the line t *, the microphone 14 ² , the line P-, the contact tongues 81, 73 des Switch D ² , the line q ³ , the contact tongues 70/84 of the switch D ¹ , the lines m ³ and w ⁴ , the receiver 15 ', the switch 25', the line n ² , the contact tongues 69 and 85 of the switch D. ' to which the latter the line q' is connected. This line leads back to station A ² , via the contact tongues 65, 78 of switch D ² and line s ² back to the battery 23 ^s . This completes the circuit and contains the battery 23 ^s and the transmitter 14 ^{2 of} the station A ^z and the receiver 15 'of A'.

Both speech circuits have the line q ' as a common center conductor, which now contains the battery 23 ^s and the contact tongues 78, 65 of the switch D ² .

In this way, the speech circuit is a single one by means of the speech battery Transmitter station and made via separate lines, as this to avoid interference seems desirable.

Claims (2)

Patent-to sayings: i. Dictation telephone system with two transmitter stations connected by a three-wire system and with stenograph stations, characterized in that by folding two circuits are established from the three connecting lines by switches for calling the transmitter stations The call batteries belonging to each donor station are not common in these two circuits Conductors (outer conductors) lie, while the same in the production of the speech circuits Lines are switched over in such a way that one of the speech banks of the donor stations switched off and the other in the known manner in the middle conductor of the speech circuits is placed. 2. dictation telephone device according to claim 1 for two donor stations and a stenograph station that can be used with one of the two donor stations can connect by means of a switch, characterized in that in this' switch, which contains four contacts, each one head of the three-wire system of each donor station interrupted in the rest position and when the switch is toggled, one three-wire system is always completely closed and at the same time a second conductor is interrupted in the other three-conductor system, one in each donor station Bell in the respective interrupted three-wire system remains at rest when the transmitter station connected to the latter calls the stenograph station already connected to the other donor station. 1 sheet of drawings.