DE2233797C3 - Message system for hospitals - Google Patents

Description

The invention relates to a communication system for hospitals for transmitting communication signals between sub-units of at least one group of room units and a central unit via a radio frequency line common to the group, with each room unit receiving a room unit address signal is assigned with a high frequency characteristic, which is used as a carrier for subunit address signals and / or control signals.

In a hospital, patients call the nursing staff via a messaging system that is in his The simplest version consists of a light call signal in front of the patient's room. More elaborate Message systems display the patient's call in a control center and enable speech intercom

bond between the patient and the nursing staff at the head office.

Known communication systems connect the beds of the patients in a star shape via direct current lines with the headquarters. The direct current lines transmit electrical signals that the patient uses Central calls and vice versa. Which require direct current lines connected to the control center in a star shape However, a high installation effort per room and a lot of lines run in the control center together. The high number of lines makes such a communication system very susceptible to failure, in particular when the speech lines of the speech connections are also laid in a star shape.

In a message system according to OE-PS 280106, a large number of patient stations are in each case own lines connected to a control center. Furthermore, extensions are connected to the central office, which can be connected to the patient stations via the control center. The headquarters has for this purpose an identification unit which detects a call from one of the patient stations and which Connection between the calling patient station and the extension enabled.

Other known communication systems lay the voice lines to reduce the number of lines together with lines for radio reception and part of the control lines as ring lines from Room to room. The voice connection with a bed is then controlled via relays.

Other known communication systems send a pulse telegram to every room or bed via a ring line to. Each room or bed has its own code pulse sequence assigned by the control center is generated one after the other in a time division multiplex process. Each bed calls with the one assigned to it Code pulse sequence or is called with it. Such a messaging system is expensive and needed still a considerable number of ring lines.

A message system which works on the basis of a time division multiplex method is known from the FR-PS 2030108 known. With this messaging system counting stages are provided in the sub-units, which are connected to a clock generator via a clock line are connected to the control center. The clock provides incremental pulses to the counting stages. The counting levels also have a preparation input, which must be acted upon by a control pulse, to switch on the respective counting level for a counting cycle corresponding to its counting capacity. To everyone Counting isi attached to this a Dekudei, the when the counting capacity of the counting stage is reached, the control pulse is sent to the preparation input of another Outputs counting level and causes this to run through the counting cycle. The counting levels of the subunits in this way form a chain of counters in which the counting stages are consecutively passed through the Counting cycle can be switched on. In order to enable communication with the control center, however, an identical counter chain can be provided in the control center. In addition to the larger one associated with it Overhead of the control center, a number of further ring lines between the control center and the sub-units must be set up were relocated. Control pulse lines must be provided in order to synchronize the Counter chain in the control center with the counter chain formed by the counting stages of the sub-units as well to ensure in the event of clock signal interference. Such clock signal interference can, for. B. by external impulses which are radiated into the communication system from outside. Additional Ring lines must be provided for voice connections. Your installation is not to be underestimated Cost factor.

It is also possible to implement communication systems for hospitals as a carrier frequency system.

H) ren. Carrier frequency systems reduce the number of the necessary lines, are, however, with the very high number of channels required in the hospital very complex and expensive due to the strict filter requirements. Such a carrier frequency system is known from DT-OS 1487386. It is used as an electronic telephone distribution system. A multitude of transmitting and receiving devices tuned to different frequencies in A central station has a large number of transmission and transmission channels, each tuned to one of the frequencies of the central station Receiving devices in subscriber stations opposite. The subscriber stations are here over a common line connected to the control center. However, the known telephone distribution system would when used as a message system in a hospital based on the hospital-specific Demand for very high numbers of channels for extremely extensive transmitting and receiving facilities in the head office.

3d From GB-PS 1126286 there is another communication system known for hospitals. Similar to the telephone distribution system discussed above Transceivers are provided in the sub-units that communicate with the control center via a high-frequency line are connected. TV sets on the beds are used as transceivers for this purpose Of the patients.

The multitude of transceivers tuned to different transmit or receive frequencies there is a large number of decoders in the control center, each of which is on a different frequency responds and triggers a display device as soon as it detects a signal on this frequency. There too the subunits, d. H. the beds are each assigned high frequencies as address signals only message systems with a relatively limited number of channels can be set up. High channel numbers would Decoders with narrow-band filters require, due to the high slope that is required of the passband would be relatively expensive.

The invention therefore has the task of addressing the. Transfer before. Message signals to reduce the technical effort required by the head office via a common line.

The communication system explained in more detail at the beginning solves this problem in that inside the control center for Receipt of the room unit address signals, the sub-unit address signals and the control signals at least one connected to the high-frequency line

pelter, with the help of a continuously indexing switching device in a predetermined order High-frequency tuning receivers that can be tuned in succession to the high frequencies of the individual room units is provided whose

it to match the individual high frequencies necessary superimposition frequencies successively from a controlled by the switching device, the superposition frequencies from one of

7 8

A normal frequency generator supplied nor receives over the high frequency line and enables frequency generating frequency synthesizer to light voice connections and the transmission of are feasible that the subunits of the individual information in both directions. To the Zim room units Sub-unit address signals Sub-units attached to units are on

and / or control signals from a simple manner in each room unit through different subunits repetitive sequence of subunit address signals identifiable. The communications system

emit address signals and / or control signals star makes a sensible use of the structure of the crane

and the high-frequency tuning receiver a die kenhauses into care groups, rooms and beds

Transmission of these subunit address signals and combines economic usability with

and / or control signals on the characteristic high frequencies with little susceptibility to interference.

the room unit address signals detecting a possibility for the transmission of audio

coding device and one of the decoding sequences, e.g. B. for a voice connection exists

direction-controlled, the address information contained therein, the low-frequency audio frequencies

To transmit address signals indicating and / or corresponding bar over the high frequency line. In

the control signals actuatable reception evaluation 15 in this case, however, can only ever talk about

device is nachgeschäitet that the control center wci- the high frequency line are transmitted. The arrival

for the transmission of voice signals and / or number, one voice connection per room entry

Sub-unit address signals and / or control unit can be expanded if the high-frequency characteristics

signals are at least one carrier for audio signals on the radio frequency line. The inventive

coupled high-frequency tuning transmitter, whose: o Message system, however, closes the possibility of

Transmission frequency selectable on the high frequency characteristic not from, audio frequencies as well as control

the room units can be matched, as well as a few that are assigned to all room units at the same time.

At least one may be coupled to the high frequency line, via the high frequency line

th further high-frequency tuning receiver to transmit low-frequency.

Reception of voice signals and / or control signals. The control signals of the subunits can be

len, the high-frequency tuning transmitter evaluating particularly easily if

and the further high-frequency tuning receiver on unit address signals and / or control signals, which

the characteristic high frequencies of the same room unit before by a low frequency oscillation with a

are matched and in the room units a sub-unit address low frequency or a

which and a receiver are formed on the high frequency line 311 control low frequency, the decoding input

are connected, whose high frequency transmission frequency direction of the center selectively to one sub-unit

and receiving high frequency each have the same unit address low frequency or control low frequency

Have frequency spacing. frequency-coordinated, the reception evaluation device

The term "room unit" here refers to low-frequency individual receivers that control the device and in the following does not indicate the spatial assignment to 35 or at least one in time in a room, but the functional combination of the subunit address low frequencies and / or the summary of several subunits that, e.g. B. with single control low frequencies, which can be tuned to the bed rooms, also distributed over several rooms, the initial evaluation device controlling low frequency. Under the expression »under-frequency tuning receiver,
unit «here and in the following the 40 devices assigned to subunit address signals and / or control of a bed or those devices which are understood by a code pulse sequence that are identified, the decoding device of the central room or a room unit has at least one common are assigned to a plurality of subunits. Message signals can in addition to common, the receiving evaluation device entden subunit address signals control signals and 45 speaking of the code pulse sequence controlling deco information signals, such as. B. voice signals or the receiver.

Be measured data signals. The receiving device is a particularly economical message system Here, taken from the high frequency line, combines room units into care groups, Messages modulated on high frequencies that correspond to the care requirements. Everyone cinnamon signals one after the other z. B. on display units of a group are in such a case directions which, through the T. sensignal or the Untcrein * ■ ·. isadressensignal- in each group repeating sequence of identifiers will. assigned to high frequencies.

The messaging system according to the invention minimizes a transmission identification high-frequency is assigned to each room unit, thus largely the technical effort 55 and a reception center different from this with minimal installation effort; this enables between the control center and the room units. Since this is the simultaneous transmission of control signals a high frequency line is used, and an intercom connection between the couple radio and television signals can be transmitted and nursing staff in the center. Same that. The high frequency line can be laid between the rooms on the shortest frequency distance between the radio frequency transmission frequencies and the zest. The fact that the receiving high frequencies of all rooms according to the invention reduces the sticking is for economic reasons a particularly necessary number of frequency channels in that it is only advantageous for each of them; In addition, the radio frequency transmission is assigned to the room and not every bed is assigned its own frequency in a simple manner from the superimposed frequency channel. This measure reduces the frequency of the receiving high frequency, which can be deduced, costs considerably, since the delimitation of the individual is particularly important when the frequency spacing of the frequency channels corresponds to a relatively simple broadband intermediate frequency.
Filter can be done. Each room unit sends and Da each room through that of its room unit

9 10

associated high frequencies identifiable signals and / or the control signals on the Kenriist, the sub-units of each room unit can store high frequencies of the room units, and are particularly easy to set up if they have a common display device that is different from one another Sub-unit address signal from available room unit address signals and / or In each room unit repeating sequence 5 subunit address signals and / or control signals of subunit address signals. one after the other from the reception evaluation input

This embodiment simplifies reading and displaying the direction. The work of the nursing

Evaluation and display of a subunit addressing staff in the head office is significantly simplified.

sensignals and / or the control signal. That simplifies when the reception evaluation device

Sub-unit address signal and / or the control unit has an arithmetic unit, which is a master unit

As already mentioned, a low-frequency counting system, such as a room unit counting

oscillation with a subunit address data in the order of their characteristic high frequencies

frequency or a control low frequency or a dormant counting system, to another, for example

Be code pulse train. By modulating the low-continuous counting of the room units or

frequency oscillation with the code pulse sequence allows 15 groups in the building based counting system

trigger additional control functions. The nie calculates, with the room unit address signals

The frequency oscillations can be displayed very much according to the latter counting system. It

separate from each other by filters in multiple ways. the actual room number of the room can be

In a hospital it is important that emergency calls are displayed throughout the building,
be answered preferentially. This can be done in a way that an address system enables call forwarding and secondary signals to be assigned a priority identification signal query within one or more maintenance groups, which is a priority of the control radio to be triggered. B. not occupied during the night, tion indicates. The priority identification signal can be used by the patient via the device for the secondary signal, one of the subunit address low-frequency query a nurse from one of the rooms overlaid with the quality and / or control low-frequency modulation, or from a neighboring care group, which are particularly easy to evaluate. An advantageous device for secondary drainage when the ranking identification signal is a question is designed so that a first and a second code pulse sequence is which can be gnal synchronized by the synchronous search transceiver to a high-frequency line. If the Syn- 30 are connected that a transmitter of the first search chronicle signal sends the code pulse sequence, then the transceiver with a receiver of the second simplifies its evaluation considerably, since then the pulses from the search transceiver and a receiver of the first different room units are simultaneously on-search transceiver with a transmitter of the second can kick. Search transceiver on the low frequency side over each

In an advantageous embodiment, the 35 are connected to a low-frequency line, with

Sub-units the coding pulse sequence of a lower or secondary interrogation from a room unit to a

frequency superimposed on a multitude of sub- other a transmit frequency and a receive frequency

units is common. Such an embodiment sequence of the first and the second search transmission

is advantageous if storage devices set the transceiver to the reception frequency and the transmission

Carrying of the subunit address signal and / or decoding frequency of one and the other

of the control signal. In such a room unit is set.

In this case, the common low frequency can be compared to the actual situation in an intensive care unit, for example, as a constant excess

It is necessary to prepare the storage facilities for waking up a patient, so can at

use writing. a sub-unit of measuring devices as additional devices

It is conceivable that the same ones are each inferred from a 45. The measurement data of these measuring devices Additional devices connected to the subunit can be automatically called up and registered or calibrated Additional control signal is assigned. This is to be supplied from the data processing system, Sufficient because in a message according to the invention if an additional device control center on the one with the cinnamon system each subunit is identifiable for itself. additional control-

Received address signals can be addressed in a very signal-selective manner and displayed in turn to the confusing when the receiving unit switches subunit address signals output value device for each room unit and / or and / or additional control signals the additional devices of each subunit of a room unit switches its own and calls up information.
Display signal device with a memory. Via the high-frequency line, it can advantageously indicate that any transmission of the room, if any, all necessary information is transmitted within the unit address signal and / or the sub-hospital. In addition to the data unit address signal and / or the control signal, information for data processing can also be stored after it has ceased. In such a trigger signal of a fire alarm or time impulse embodiment, the operating personnel can transmit the signals from clocks. In order to have an immediate overview of the number of calls for the patient. 60 radio frequency intended for its speech connection

Are there a large number of senders and recipients that do not need to be blocked unnecessarily in a display field?

to provide, reduce signaling devices, one embodiment provides that on

gert a common point on the high-frequency line, for example prepared as a numeric display

display device formed the space requirement considerably. Additional high-frequency transmitter and / or an additional

Such an advantageous embodiment is that a high-frequency receiver can be connected which has

characterized in that the reception evaluation an additional identification high frequency as the address signal

establishment of the transmission of the room unit transmission of data signals and / or control

address signals and / or the subunit address signals and / or a voice connection.

The additional high frequency transmitter and the additional high frequency receiver are preferably designed to be portable and can therefore be used in a targeted manner. Is on at least an additional high-frequency receiver in the control center, at least one recording device for speech, for example or data is connected, a portable additional frequency transmitter serves as a “notebook” on which, for example, the diagnosis can be made during a visit.

If a switching device is provided in the control center, which enables telephone calls to be switched on to an existing voice connection between the control center and the room units or sub-units permitted, the messaging system according to the invention does not need its own switchboard for Transferring telephone calls.

The invention is explained in more detail below with reference to drawings. Here shows

1 shows a schematic block diagram of a message system according to the invention,

Fig. 2 shows a block diagram of the room units of the communication system according to FIG. 1,

3 shows a device for coupling to a high-frequency line,

4 shows a block diagram of a bed combination,

5 is a block diagram of a door combination,

6 shows a central receiving unit of the embodiment according to FIG. 1,

7 shows a central transmission unit of the embodiment according to FIG. 1,

8 shows a measurement center,

9 shows a device for secondary interrogation,

10 shows a pulse diagram for the identification of beds in a room,

11 shows a principle block diagram of a further embodiment,

FIG. 12 shows a block diagram of a control center according to FIG. 11, and

FIG. 13 shows a device for secondary interrogation for the control center according to FIG. 12.

1 shows a basic block diagram of a message system. A high-frequency line la connects a center 2a with a number of room units 3a. The high-frequency line Ια is a coaxial cable that is laid on the shortest route between the control center 2a and the room units 3a and is terminated at its free ends with its characteristic impedance Z. As shown in FIG. 2, each room unit 3a has a room modem 4. The room modem 4 is a selective transceiver that is matched to a respective transmit or receive frequency assigned to the room unit 3a. The room modem 4 as well as a central modem 8 described below are connected to the high-frequency line la with the correct wave resistance. This is also the case with all of the other devices explained below and directly connected to the high-frequency line 1a and is not specifically mentioned.

A circuit arrangement that enables simple connection with correct characteristic impedance is shown in FIG. 3. The room modem 4 is connected via a resistor A3 to the center tap of a series circuit of two resistors R1 and R2 inserted into the high-frequency line la . The resistors A1, R2 and R3 are chosen so that the input resistance of the room modem 4 on the high-frequency side does not change the characteristic impedance of the high-frequency line la.

On the room modem 4 there is a bed combination 5 with an or for each bed in a room several additional devices 6 connected. There is also a door combination 7 with the in each room Room modem 4 connected. The connection of the door combination 7 and the bed combination 5 with the room modem 4 takes place through two ring lines, also designed as coaxial cables.

ίο Each room modem 4 of a room unit 3a corresponds to a central modem 8 in the control center 2a. The central modems 8 are connected to a selector switch 92, which connects them one after the other to an evaluation device 90 and thus to a display device 91 connected to the evaluation device 90. The evaluation device 90 checks whether a call is being made via this central modem 8. Room units 3a in FIG. 1 are divided into groups 1 to m , which are each connected to a control center 2a via their own high-frequency lines la .

The display device 91 comprises a call display device 9, the signals from the bed combinations 5 of each room unit 3a, as well as a presence signal device 10, via which the nursing staff by pressing the door combination 7 his stay in a certain room the control center 2a can report. However, an output signal from an automatic presence

3 «security control fed into door combination 7 will.

Each room modem 4 and each central modem 8, as will be explained in more detail below, each have a transmitting part and a receiving part. The transmitting part emits a high-frequency carrier oscillation assigned to the room modem 4 or the central modem 8 to the high-frequency line 1 a. Each room unit 3a is thus assigned two modem identification frequencies. The modem frequencies of each room unit 3a have the same frequency spacing. The transmitter part modulates the control signals generated in the bed combination 5, the additional device 6, the door combination 7 or a call device of the control center 2a to the high-frequency

-is carrier oscillation. The control signals are modulated or unmodulated low-frequency oscillations of different frequencies that correspond to the different Functions of the messaging system are assigned. The receiving part of the room modem 4 is

so matched to the modem frequency of the transmitter part in the assigned central modem 8. Corresponding have the receiving part of the central modem 8 and the transmitting part of the assigned room modem 4 the same modem frequency.

In one embodiment, there are up to 4 <"> room units 3a can be connected to the control center 2a. The modem frequencies of the room units are 3 " with a channel spacing of 250 kHz in a frequency band of 20 to 30 MHz in the case of transmission and

ftii at 30.7 to 40.7 MHz when receiving. The two Have modem frequencies of a room unit 3 <j a constant distance of 10.7 MHz. The frequency range of the low frequency control signals extends from 6 kHz to 33 kHz. Since each bed combination 5 of a room unit 3a has a low-frequency Bed frequency is assigned. are with a channel spacing increasing by a factor of 1.2 up to 6 bed combinations 5 and one door

combination 7 can be connected to room modem 4.

In Fig. 4 is a block diagram of the bed combination 5 shown. The bed combination 5 is connected to the high-frequency line la Room modem 4 connected. Additional devices 6 of the bed combination 5 are listening and speaking cushions 11, an operating device 12 and a measuring attachment 13. The hearing and speaking cushion 11 has a microphone 14 and a handset 15 and enables a voice connection between a patient and the nursing staff. The microphone 14 is via a switch 17 to be actuated by a paging receiver 16 connected to a transmitting part 18 of the room modem 4. One also actuated by the paging receiver 16 Changeover switch 20 alternately connects the receiver 15 to a radio receiver 21 or an amplifier 22 of the voice connection. Both the radio receiver 21 and the amplifier 22 are connected to a low-frequency output of a receiving part 19 of the room modem 4. One For VHF and television frequencies permeable weie 19a in the receiving part 19 connects its low frequency output with the high frequency line la.

The operating device 12 comprises a call signal 23, i. H. a light signal and / or a buzzer, and a Call button 24. The call receiver 16 is connected to the low frequency output of the Receiving part 19 connected and selectively receives a bed combination in question 5 associated bed frequency. The call receiver actuates when the bed code is received 16 the call signal 23 and sets by closing the switch 17 and by switching of the switch 20 from the radio receiver 21 to the amplifier 22 the speech connection to the audio and speaking cushion 11.

When the call button 24 is actuated, the patient emits a call signal. The display device 91 in the central unit la (Fig. 1) shows the combination bed of the relevant assigned call signal 5, even after the operation of the call button 24 at. After a start pulse from the call button 24, an oscillator 25 generates a low-frequency oscillation at the bed frequency assigned to the bed combination 5. The oscillator 25 has its output connected to the transmitting part 18 and swings until a connected to the oscillator 25 restoring receiver 26 receives a reset pulse from the central la through the receiving portion 19 and switches off the oscillator 25th The low-frequency oscillation of the oscillator 25 is mi? a sequence of call clock pulses from a call clock pulse generator 27 is modulated. The call clock pulse generator 27 emits a number of call clock pulses in a recurring sequence. The number and / or its point in time in relation to a synchronous signal corresponds to a value of the issued call; it determines the sequence of an answer via the control center la The greater the number of call pulse pulses delivered in a sequence, the faster the calls can be answered. The display device 91 shows the most significant call in the case of several calls issued simultaneously from different bed combinations.

The call clock pulses of each bed combination 5 occur synchronously m ^: a synchronous signal that the control center la issues. The sync signal consists of a periodically recurring sync pulse and a subsequent sequence of 14 call clock pulses.

pulse and is sensed as a high frequency oscillation transmitted at 470 kHz. A call clock receiver 28 is connected on the one hand to the receiving part 19 and on the other hand outputs the sync signal to the call clock pulse generator 27, which corresponds to the set Significance its number of call pulse pulses generated synchronously with the synchronous signal.

The measuring attachment 13 which can be connected to the bed combination 5 enables the measured values of a measuring device 29 to be transmitted to the control center 1a . The additional measurement 13 allows a constant monitoring of a patient, z. B. in an intensive care unit. An output of a polling receiver 30 and a further output of the paging receiver 16 are brought together in an AND gate circuit 31. When low-frequency vibrations occur at the same time as the bed frequency of the bed combination 5 on the call receiver 16 and a measured value retrieval frequency on the call receiver 30, the AND gate circuit 31 emits a start pulse to the measuring device 29. A converter 32 connected to the measuring device 29 and to a measured value transmitter 33 modulates the pulse-shaped measured values which are then emitted to a low-frequency oscillation with a measured value frequency. The measured value transmitter 33 is also connected to the low-frequency input of the transmitter part 18.

The door combination 7 shown in Fig. 5 corresponds essentially to the bed combination 5, but is adapted to its particular function. The nursing staff can issue a call to the control center la by pressing the call button 24 in a door control device 12 'via the call pulse generator 27 and the oscillator 25. The call clock pulse generator 27 is also connected to the call clock receiver 28, which receives the synchronization signal from the control center 2a. In accordance with a call from the bed combination 5 in FIG. 4, the oscillator 25 outputs a characteristic frequency of the door combination 7 as long as

-in until a reset pulse from the control center la switches off the oscillator 25 via the reset receiver 26. A low-frequency oscillation generated in the control center la with the characteristic frequency of the door combination 7 switches on a call receiver 16 '. The paging receiver 16 'actuates the switch 17 and a further switch 34 and thus enables the speech connection via the microphone 14 or the receiver 15 in a telephone 11'. At the same time, the call receiver 16 'actuates the call signal 23 in the door control device

12 '. By actuating a presence switch 35, the nursing staff reports their stay in the room to the presence signaling device 10 of the control center 1 a, in that a presence oscillator 36 outputs a presence frequency to the transmitting part 18 of the room modem 4. The function of the presence switch 35 can also be taken over by the automatic presence control. The whereabouts of the nursing staff is thus always known and the nursing staff is on the call signal

wi 23 as well as via the voice connection of the telephone 11 accessible. Instead of the telephone 11 ', an intercom device with a loudspeaker can also be used and kick a microphone.

The following are the central la on hand to dei

6 and 7 are explained in more detail. Any central modem 8 has a transmitting part 43 and a receiving part 44. The receiving part 44 is selectively au the modem frequency of the transmitter part 18 in the room

aiennodein 4 matched to the assigned room unit 3a. The transmitting part 43 sends on the second modem code frequency of the room unit 3a, to which the receiving part 19 of the assigned room modem 4 is tuned.

Fig. 6 shows a receiving unit of the center la. It is set up to display the actual room number, which differs from that indicated by the selector switch

92 assigned sequence can differ. For each room unit 3a , a receiving terminal 44 of the central modem 8 is connected to the high-frequency line la of the respective group in the control center la. The receiving part 44 emits the recorded low-frequency control signals to a respective call evaluation and connection device 93. Each of the call evaluation and connection devices 93 is connected to a selector 94. The selector 94 corresponds to the selector switch 92 from FIG. 1 and ensures via a lock that only one room unit 3a can be connected at the same time. A room counter 95 counts the sync pulses of a clock generator 96 supplied via a changeover switch 97 and switches the selector 94 on from one call evaluation and connection device 93 to the next with each sync pulse.

Since the bed combinations 5 emit the call clock pulses synchronously with the synchronous signal, the appear triggered calls synchronously in the corresponding call evaluation and connection devices 93. A priority checking device 62 is connected to all call evaluation and connection devices 93 and determines the call with the highest priority based on the number and / or length of the call pulse pulses after the sync pulse. Compare the call evaluation and intrusion devices 93 the identified most significant call with those delivered by the corresponding receiving parts 44 Call. If the value of the call is correct in one of the call evaluation and connection devices 93 corresponds to the value of the most significant call, then this call evaluation and connection device is 93 prepared for activation. The activation takes place as soon as the room counter 95 in one Counting cycle, the relevant call evaluation and connection device 93 is switched on via the selector 94 Has. If a higher value call occurs compared to other calls, a will sound to the priority checking device 62 connected acoustic priority signal 63 and one likewise to the priority checking device 62 Connected call type display 99 shows the significance of the call by specifying a call type. A call counter 98 is connected to all call evaluation and connection devices 93 and shows the total number of calls received.

Is a call evaluation and connection device

93 switched on, it sends a transfer pulse to a buffer via a line 100 101 from. The buffer 101 is connected to the room counter 95 and takes the transfer pulse towards one of the connected call evaluation and connection device 93 assigned Sequence number. A group identification memory is connected to the intermediate memory 101 via a changeover switch 102 103 connected. The group identification memory 103 takes from the intermediate memory 101 the sequence number stored there and assigns the associated call evaluation and connection device 93 to a certain group.

For this purpose, the group identification memory 103 contains a read-only memory (for example a switch field) and a control which identifies the group through which the selector 94 passes. A difference memory 104 is connected to the group identification memory 103 and takes the respective group from it. The difference memory 104 is a read-only memory which stores a specific difference number Δζ for each group. The difference number

ίο Δζ results from the difference between the actual room number and the sequence number in the room counter 95. If there are 100 rooms, the room counter 95 counts from 1 to 100. B. on four floors, it shows

The table below shows the corresponding assignments.

Actual group Difference order room no. number Δ _ζ number in the room

mercounter 95

101 ... 125 1 100 1 ... 25th 201 ... 225 2 175 26 ... 50 301 ... 325 3 250 51 ... 75 401 ... 425 4th 325 76 ... 100

An addition stage 105 connected to intermediate counter 101 with one input via changeover switch 102 and receiving the difference Δζ from difference memory 104 with a further input outputs the actual room number to a room display 107 via changeover switch 106. The room display 107 shows the actual room number noted on the building. If the nursing staff actuates an override button 109, a memory 110 connected to the override button 109 emits an override signal to all call evaluation and override devices 93. The call evaluation and connection device 93, which has already been prepared via the selector 94, then connects to a low-frequency line 108 common to all call evaluation and connection devices 93. A bed call receiver 51 for each bed of a bed combination 5 and a door call receiver 53 for the door combination 7 are connected in parallel to the low-frequency line 108. The bed call receiver 51 and the door call receiver 53 respond to low-frequency vibrations with the bed frequency or the characteristic frequency of the door combination 7. A bed display 111, which is also connected in parallel to all bed call receivers 51 and the door call receiver 53, shows the bed calling in each case by means of a number. Simultaneously with the activation by the activation key 109, a receiver 59 enables an audio connection via an amplifier 112 and a low-pass filter 61 which is transparent to speech frequencies and is connected to the low-frequency line 108.

If a nurse is required for a patient, the closest nurse can be searched for via the control center la. When a button 113 "Find sister" is pressed, a memory 114 connected to it emits a search signal. The search signal switches the changeover switches 97, 102 and 106 from the position shown in FIG. 6 to an opposite position. After switching over the switch 97, the clock generator 96 sends the sync pulses to a search counter 115. The search counter 115 is connected to the selector 94 and now takes over the task of the room counter 95, which has now been switched off. The search counter 115 has one

Up and down counters, which are alternately scanned by the sync pulses of the clock generator 96 . At the beginning of the search process, the up and down counters of the search counter 115 have the same count, which corresponds to the count of the buffer 101 and thus of the room counter 95, which corresponds to the room from which the call was made. The selector begins to scan the neighboring rooms alternately to the "left" and "right" of the calling room. A connection 117 between the group identifier storage 103 and the search counter 115 prevents both the forward as well as the down counter of the search counter 115 run in an adjacent group. If the selector 94 scans a call evaluation and connection device 93 via which a nurse reports her presence, the search counter 115 receives a stop signal from a presence receiver 64 which is also connected to the low-frequency line 108. The presence receiver 64 responds selectively to a low-frequency presence signal with the presence characteristic frequency which is emitted by the presence oscillator 36 when the presence switch 35 (FIG. 5) is actuated. Since the search counter 115 via a line 118 and the switch 102 is also connected to the group identifier storage 103 and the switch 106 is also switched, shows a sister display 119, the actual room number of that room to where the nurse is located. A circular memory that is not shown in the circuit diagram stores the calls according to their significance and the order in which they arrive. After answering the call, the nursing staff actuates a delete key 120 and thus emits a reset signal to the memories 110 and 114 and to the call evaluation and connection devices 93 via a reset generator 121 . The reset signal also resets switches 97, 102 and 106 .

Fig. 7 shows a Zentralsendeeinheii the embodiment according to Fig. 1. The transmission parts 43 of each of the central modem 8 are in turn connected in groups to the high-frequency lines la. Each transmitting part 43 receives low-frequency control signals from a respectively connected switching device 130 . The selector 94 selects the connection device 130 and prepares it for connection. The room counter 95 switches the selector 94 on in the cycle of the synchronization pulses emitted by the clock generator 96. The group identification counter 103 connected to the room counter 95 determines the associated group of the connection device 130 prepared for connection and forwards the information to the differential memory 104 .

Then the difference memory 104 generates the difference number Az. The nursing staff sequentially stores by entering via a keypad 131, the actual room number and bed number in an input memory 132. A subtractor 133 is connected to a respective input with the input memory 132 and the differential memory 104, takes actual room number and the difference number Az and subtracts them from each other. A connected with the room counter 95 and the subtracter 133 comparator compares according to one of the nursing staff of a start button 136, and a memory 135 output start pulse, the sequence number in the rooms counter 95 with a count number in the subtracter 133. Equivalent to the sequence number in the rooms counter 95 the count number in the subtracter 133, the associated switching device 130 switches through. The last digit read into the input memory 132 via the keypad 131 corresponds to the bed number, corresponding to which the input memory 132 switches on an associated bed oscillator 55. If the last digit read into the input memory 132 is missing, a door oscillator 56 is switched on. Since all switching devices 130 and all bed oscillators 55, as well as door oscillator 56 are connected in parallel to a low frequency line 137 , bed oscillator 55 or door oscillator 56 selected by keypad 131 is switched to switched on switching device 130. The reception part shown in FIG. 4, 19 of the Zimmermcdems 4 demodulates the supplied via the high-frequency line la high-frequency carrier oscillation and the selective call receiver 16 responsive to the bed characteristic frequency of the oscillator bed 55 triggers the calling signal 23 from. A microphone 60, likewise connected to the low-frequency line 137 via an amplifier 138 , simultaneously establishes the speech connection with the hearing and speaking cushion 11 of the bed combination 5 or the telephone 11 'of the door combination 7 in FIGS. 4 and 5, respectively. An input display 139 connected to the input memory 132 shows the actual room number entered on the keypad 131 and the number of beds.

When the cancel button 120 is actuated, the reset generator 121 sends the reset signal to the memory 135 and to the activation devices 130 and cancels the activation that has been carried out. A Ruftaktgeber 83 generates the sync signal and modulates a Ruftaktoszillator 84. The Ruftaktoszillator 84 is connected to each group to the high-frequency lines la and sends to 470 kHz.

8 shows an embodiment of a device for central measurement value acquisition. It enables the periodic retrieval of measured values from the measuring device 29 connected to the bed combination 5 via the measuring attachment 13. An output device 66 stores the measured values, records them or evaluates them with the aid of an electronic computer. All measuring accessories 13 of the communication system respond to the same measured value retrieval frequency and the measured values of each measuring device 29 are transmitted modulated on low frequency oscillations with the same measured value frequency. The room units 3a can be distinguished by their chronological sequence in a time division multiplex method. An electronically executed multiple switch 67 turns temporally one after the low frequency output of the receiving section 44 of each central modem 8 to an input of a measurement receiver 69. The measurement receiver 69 is tuned to the Meßwertfrequenz of Meßwertsenders 33 in Meßzusatz 13 and connected to the output device 66th Another multiple switch 68 connects the transmitting part 43 of the central modem 8, the receiving part 44 of which is switched by the multiple switch 67 to the measured value receiver 69, synchronous to the synchronous signal with an address transmitter 70. The address transmitter 70 emits a low frequency oscillation with the bed frequency of a bed combination 5 that can be selected by the nursing staff off and is using for this purpose

Bed oscillators 71 connected. The measuring device 29 assigned to a specific bed combination 5 emits its measured values when the bed characteristic frequency of this bed combination 5 and the measured value retrieval frequency are present at the same time. The further Rather s gang switch 68 connects to this end one after the other 43 with a retrieval oscillator 72 which generates a low-frequency oscillation with each IvJeßzusatz 13 common Meßwertabruffrequenz each central modem 8 the transmitting part. The assignment of the measured values displayed in the output device 66 to the bed combinations 5 of each room unit 3a results from the setting of the address code 70. The multiple switch 67 and the further multiple switch 68 switch the measurement center from one room unit 3a to the next at a switching frequency of about 100 Hz . The address transmitter 70 can be designed in such a way that between the switching steps it calls up the measured values of several bed combinations 5 of a room unit 3.

The previously described speech connection between the room unit 3a and the control center 2a requires that nursing staff be present in the control center la . This is not always guaranteed during the night. The message system can therefore be expanded in a simple manner by a device for secondary interrogation 73 shown in FIG. The device for secondary query 73 has a first search modem 74 with a first search receiver 75 and a first search transmitter 76 and a second search modem 77 with a second search receiver 78 and a second search transmitter 79. The first search modem 74 and the second search modem 77 are connected on the high-frequency side to the high-frequency line 1a. On the low-frequency side, the first search receiver 75 is connected to the second search transmitter 79 and the first search transmitter 76 is connected to the second search receiver 78 by a low-frequency line 80 each. The first search receiver 75 and the first search transmitter 76 of the first search modem 74 set their current reception frequency or their current transmission frequency one after the other in a time division multiplexing process to the modem frequency of the individual room units 3a . The current transmission frequency and the current reception frequency change according to the modem frequency in fixed frequency steps of 250 kHz and have a frequency spacing of 10.7 MHz from one another. The structure of the second search modem 77 corresponds to the first search modem 74.

The device for secondary interrogation 73 can be used separately from the control center 2a. An example explains how they work in the following. A first room modem 81 has the modem identification frequencies 20 MHz in the case of transmission and 30.7 MHz in the case of reception; a second room modem 82 has the modem identification frequencies 25 MHz when sending and 35.7 MHz when receiving. A patient makes a call on the scrr ^ frequency 20 MHz via his bed combination 5 connected to the first room modem 81. The first search receiver 75 of the first search modem 74 determines the outgoing call from the first room modem 81 by checking the modem identification frequencies of all room units 3a in succession. Since the current transmission frequency of the first search transmitter 76 is at the same distance from the current reception frequency of the first search receiver 75 as the two modem identification frequencies of the first room modem 81, both the first search receiver 75 and the first search transmitter 76 are matched to the first room modem 81. The nursing staff present reports their presence by operating the presence switch 35 in the door combination 7 via the second room modem 82. The second room modem 82 sends this control signal on the modem code frequency 25 MHz. The second search modem 77 also checks successively in time for the modem identification frequencies of each of the room units 3a and determines the control signal coming from the second room modem 82. Corresponding to the first search modem 75, the second search receiver 78 and the second search transmitter 79 are thus also each tuned to one of the modem identification frequencies of the second room modem 82.

The first security modem 74 exits when checking the modem keriiiirequenzen 20 MHz and 30.7 MHz its search process. The search operation of the wide search modem 77 is in checking the modem identification frequency 25 MHz and 35.7 MHz terminated. The current transmission frequencies and current reception frequencies the first search modem 74 and the second search modem 77 remain at the modem identification frequencies of the first room modem 81 and the second Zimir.modem 82 discontinued. Since that first search modem 74 with the second search modem 77 on the low-frequency side through the low-frequency lines 80 are connected, the voice connection between the first room modem 81 and the second room modem 82 and thus established between the patient and the nursing staff present.

Fig. 10 shows a timing diagram of a further embodiment used for marking beds in a room, in contrast to the embodiments described above, a pulse code used.

10a shows the synchronous signal which has periodically recurring synchronous gaps as synchronous pulses and a subsequent sequence of 15 call clock pulses. The synchronization signal, generated by the call clock generator 83 and delivered by the call clock oscillator 84 to the high-frequency line la , is available in every bed combination 5 and in every door combination 7. By fading out a single impulse from the first seven call pulse impulses, a first code word assigned to the bed numbers 1 to 6 and the door combination 7 is created via a 1 out of 7 code. As shown in FIGS. 10b to 10h, the time interval between the pulse and the synchronous gap determines the bed number. A second code word follows the first code word. The second code word determines the type of call, ie the significance, by masking out a single pulse from the remaining call pulse pulses. The more significant a call is, the earlier its corresponding impulse occurs in the second code word. In this way, if there are several calls of different significance in one room, priority can be given to the higher-valued one, since it is recognized earlier than calls with a lesser significance. The second code words of FIGS. 10i and 10h differentiate between a voice call and a light call which does not allow a voice connection. The second code word according to FIG. 10g is assigned to a call from a bathroom. Yet

The emergency calls from a patient or a nurse shown in FIGS. 10f and 10e are of higher value. The second code word according to FIG. 10d is assigned to a monitor. The highest quality call type is Doctor emergency call shown in Fig. 10c. The first and the second code word can be combined as desired.

11 shows a further embodiment of the message system according to the invention in a basic block diagram. Parts that have the same function as the embodiment described above are provided with the same reference numerals and, to distinguish them, with a letter b .

Room units 36 are connected in parallel to a high-frequency line 16. In a control center 26, a single modem 150 for all room units 36 is connected to the high frequency line 16. A selector switch 151 connects the modem 150 one after the other with oscillators 152 for modem identification frequencies. The oscillators 152 generate the superimposition frequencies assigned to the respective room units 36 and tune the modem 150 to the modem characteristic frequencies. If a call is made from a room unit 36 , the selector switch 151 remains at the oscillator 152 of this room unit 36. A further selector switch 153 is coupled to the selector switch 151 and connects a room display 154 assigned to the calling room to the modem 150. The room display 154 displays the call. A bed display not shown in FIG. 11 additionally shows the calling bed. The voice connection or a call from the control center 26 can take place via the modem 150 or via a further, not shown, modem connected to the high-frequency line 16 and to further oscillators 152 for superimposed frequencies.

FIG. 12 shows a block diagram of the control center 26 according to FIG. 11. Determined in this embodiment a pulse code according to Fig. 10, the number of beds and the call art. In this particular embodiment, there are 240 Rooms in groups of 40 rooms each connected to six lines Ll to L6. The modem frequencies each room unit 36 are repeated in each group.

A first modem 160 , which can be tuned to the modem characteristic frequencies of a group, has a receiving part 161 and a transmitting part 162 . A high-frequency splitter 163 connects the receiving part 161 and the transmitting part 162 on the high-frequency side. It is connected to a line switch 164 , which selects one of the six lines 16 according to the group of the room unit 36 and connects it to the high-frequency splitter 163.

A first frequency synthesizer 165 is connected to the receiving part 161 and to the transmitting part 162 of the first modem 160 and determines the modem characteristic frequencies to which the first modem 160 is tuned. The first frequency synthesizer 165 takes a basic frequency (here 20.833 kHz) from a quartz-controlled normal frequency generator 166 and generates an oscillator frequency for the receiving part 161 and the transmitting part 162 in accordance with the channel information supplied.

The channel information is a binary-coded number assigned to a room unit 36 in a group

ischen 1 and 40. A channel counter 167 generates the channel information by counting the sync pulses emitted by a call clock generator 836 in the sync signal. With each sync pulse from the call clock generator 836 , the channel counter 167 switches the first frequency synthesizer 165 from the modem identification frequency of one room unit 36 to the modem identification frequency of the next. The order in which the room units 36 of all groups are to be switched on is determined by a room counter 168. The room counter 168 is a binary counter that counts from 1 to 240, which, also connected to the call clock generator 836 , advances by one unit with each synchronization pulse. After every fortieth synchronization pulse, the room counter 168 sends a reset pulse to the channel counter 167 and the channel counter 167 starts counting from the beginning. After every 40 synchronized pulses counted, the channel counter 167 emits an incremental pulse to a line counter 169 . The line counter 169 is connected to line switch 164 and switches this from one high-frequency line 16 to the next.

The call clock generator 836 generates the synchronizing signal.

For this purpose, the normal frequency generator 166 outputs a signal with a frequency of 1.3 kHz to the call clock generator 836 as a repetition frequency of the call clock pulses. A 1: 16 divider 170 is also connected to the call clock 836 and divides the frequency of this signal by 16. The Ruftaktgeber 836 then determines every sixteenth Ruftaktimpuls, z. B. by fading out as a sync gap, to the sync pulse. A sensing stage 171 picks up the sync signal from the call clock generator 836 , which consists of sync pulses and call clock pulses, and modulates it onto a 470 kHz signal supplied from the standard frequency generator 166. A synchronizing signal feed 172 is connected to the feeler stage 171 and supplies the modulated synchronizing signal to all high-frequency lines 16 at the same time.

A paging receiver 173 is connected to a low frequency output of the receiving part 161 and detects a paging signal emanating from a room unit 36 . The ringing signal is a low frequency

4i. oscillation with a ringing frequency common to all bed combinations, on which the first and second code words are superimposed to identify the bed number and the type of call. The paging receiver 173 prepares a room signal 174 assigned to the room unit 36 via a respective room signal memory 175 and a flicker circuit 176 for displaying the call signal. The paging receiver 173 is connected in parallel to all room signal memories 175 for this purpose. A room number decoder 177 then switches on the room signal 174 assigned to the calling room unit 36 , corresponding to room information A from the room counter 168 . The room number decoder Ϊ77 has 240, each with a room signal memory 175

A release line connected outputs B and switches on one of the outputs B according to the 8 bits of the room information A in a 1 out of 240 code.

If one of the room signals 174 indicates a call signal, the nursing staff must intrude by pressing a corresponding room key 178. The room keys 178 are connected to a room number encoder 179 which converts the 1 out of 240 code information from the room keys 178 into an 8-bit retrieval signal. A comparator 180 connected to the room number encoder 179 and to the room counter 168 compares this request signal with the room information A. The comparator

180 is connected on the output side to an input of an AND gate 181 and prepares this for switching through when the request signal and the room information A are the same. Another input of the AND gate 181 is connected to a first output of a call evaluation circuit 182 . The call evaluation circuit 182 is connected to the call receiver 173 and to the call clock generator 83 £> and receives the call signal from the call receiver 173 in synchronism with the synchronous signal. At its first output, it emits the first code word corresponding to the number of beds. A bed display 183 connected to the first output shows the bed number of the calling bed. The AND gate 181 prepared by the comparator 180 transmits the first code word to a bed number generator 184. In this case, the bed number generator 184 automatically emits a further ringing signal to a second modem 185 . This further call signal switches on a call receiver in the calling bed combination (not shown) and thus establishes the voice connection. For this purpose, the second modem 185 has a transmitting part 186 and a receiving part 187 . The receiving section 187 is connected to a receiver 59b via an amplifier 188 . A microphone 606 is connected to the transmitting part 186 via an amplifier 189 . A further high-frequency splitter 190 connects the transmitting part 186 and the receiving part 187 on the high-frequency side and connects the second modem 185 to a further line switch 191 . The line switch 191 selects one of the six high-frequency lines Ib in accordance with a signal from the room number encoder 179 . A second frequency synthesizer 192 takes the channel information from the room number encoder 179 and tunes the transmitter section 186 and the receiver section 187 to the respective modem frequency by outputting appropriate oscillator frequencies. Bed buttons 193 and a door button 194 are connected to bed number generator 184. By operating the bed buttons 193 or the door button 194 , the function of the bed number generator 184 can also be triggered manually.

The room signal 174 with the most significant call can periodically be switched on and off for a short time via the flicker circuit 176. For this purpose, the call evaluation circuit 182 outputs the second code word corresponding to the call type to a changeover switch 195 at a second output. A changeover pulse emitted by the room counter 168 after every 240 counting steps switches the changeover switch 195 over once. In one position, the changeover switch 195 forwards the second code word to a call type memory 196 which stores the call types occurring in a first counting cycle of the room counter 168 and displays them via a call type display 197 . At the beginning of the next counting cycle, the switching pulse switches the switch 195 to a second position and thus forwards the second code word to a call type comparator 198. The call type comparator compares the most significant call type in the call type memory 196 with the call types occurring in the second counting cycle. When the highest value call occurs in the second counting cycle, the call type comparator 198 prepares the flicker memories 199 assigned to the flicker circuits 176 for writing. Since each flicker memory 199 is connected to one of the output

B of the room number decoder 177 is connected, the flicker memory 199 associated with the most significant call switches on the associated flicker circuit 176 . The corresponding room signal 174 indicates this by flickering.

A presence indicator 200 is provided for each of the 240 room units 3b , which indicates the presence signal according to FIG. 10h. Each presence indicator 200 is via a presence memory

κι 201 connected in parallel to a presence receiver 202 . The presence receiver 202 receives the presence signal from the receiving part 161 and prepares all the presence memories 201 for reading. Each of the presence memories

is 201 is connected via an enable line to one of the outputs B of the room number decoder 177 , which switches on the called presence indicator 200 in accordance with the room information from the room counter 168.

In Fig. 13 of the center Ib of FIG. 12 is a means for addition to query according to Fig. 9 for the embodiment. The device for the secondary query connects the nursing staff ^ when the center 2b is not occupied. B. a nurse in a room with the patient. The device shown in FIG. 13 for secondary interrogation checks whether the patient's call can be interrogated or not. A call cannot be queried if no voice connection is possible, e.g. B. because the patient has no listening and speaking pillow.

.κι In this case the sister must have a normal Light call signal can be called.

Whether or not a call can be interrogated is decided by an interrogation evaluation circuit 210, which receives the call signal from the call receiver 173 at point C in FIG.

A memory 211 is connected to an output of the interrogation evaluation circuit 210 and stores a call signal which cannot be interrogated. Simultaneously with the presence signal D appearing at the output of the presence receiver 202 in FIG. 12, the room counter 168 outputs the sequence number of a room with a nurse's presence. Release lines which are combined to form a maintenance group and originate from outputs B of the room number decoder 177 in FIG. 12 are connected to inputs of an OR gate 212 . At an output of the OR gate 212 an enable signal occurs when the room counter 168 in Fig. 12, the indoor unit 3b aufschal- with sister presence

5 (i tet. A switch 213 interrupts the release signal and switches the device for secondary interrogation on or off. An AND gate 214 receives the call signal from the memory 211, the presence signal D and the release signal with one input each.

If all three signals are present at the same time, the first modem 160 in FIG. 12 is connected to the room unit 3b from which the presence signal D is emitted. An output of the AND gate 214 is connected to the Sendetefl 162 of the first modem 160 and emits a call signal to the room unit 3b with the nurse's presence via the transmitting part 162, the high-frequency switch 163, and via the line switch 164. A door number transmitter 215 is also connected to the transmitting part 162 . It emits a call signal with a first code word according to FIG. 10h and a second code word according to FIG. 10h. The door combination of the room unit 3b with nurse presence indicates this call signal. The origin of the

Rufs puts the nurse present over a conventional one placed in front of the patient's room Light call signal fixed.

If the call signal can be interrogated, the interrogation evaluation circuit 210 emits a write-in pulse at a further output to an information memory 216, into which the room information A from the room counter 168 in FIG. 12 is then written, which corresponds to the room number of the calling patient. The information memory 216 is connected to a frequency synthesizer 217 which tunes a first auxiliary query modem 74b to the modem identification frequencies of the calling room unit 3b. At the same time, a memory 219 stores the write-in pulse and, even after the room counter 168 has been advanced in FIG. 12, indicates that an interrogable call has been made. The memory 219 prepares an AND gate 220 for the delivery of a write-in pulse to a further information memory 221. The AND gate 220 emits the write-in pulse when the presence signal D from another room unit 3b with a nurse's presence and the release signal are present at the same time at a further input.

In response to the write-in pulse, the room information A from the room counter 168 in FIG. 12 is written into the information memory 221. The room information A in the information memory 221 controls a further frequency synthesizer 222 and tunes a second auxiliary interrogation modem 77b to the modem identification frequencies of the room unit 3b with nurse presence.

Similar to FIG. 9, the first sub-interrogation modem 74b has a sub-interrogation receiver 75b on, which is connected to a sub-interrogator 79b of the second sub-interrogation modem 77b via a low-frequency line 80b is connected. The sub-interrogation receiver 75b is at the modem code frequency at the transmitting end the room unit 3b of the patient and the secondary interrogator 79b sends on the receiving modem code frequency of the room unit 3b with nurse presence. A Door number transmitter 218 is also connected to the low frequency line 80b and dials by delivery a call signal with a first code word according to FIG. 10h and a second code word according to FIG. 10i the door combination of the room unit 3b with nurse presence. A secondary polling station 76b of the first sub-interrogation modem 74b is connected to a sub-interrogation receiver 78b of the second sub-interrogation modem 77b connected via a low frequency line 80c. The auxiliary query recipient

κι 78b is matched to the transmission-side modem frequency of the room unit 3b with nurse presence and the sub-interrogator 76b transmits on the receiving-side modem code of the room unit 3b of the patient. A bed number transmitter

is 223 is connected to the low frequency line 80c and selects the patient's bed combination via the secondary interrogator 76b. About one each Radio frequency splitter 224 and 225 is the first and second auxiliary interrogation modems 74b and 77b to the High frequency line Ib connected to a care group. After the call has been dealt with, the Sister, from the door combination of her room unit 3b, via one to the low-frequency lines 80b and 80c connected reset receiver 226 the voice connection again. Of the Reset receiver 226 prepares the interrogation facility for a new call.

The bed combinations connected to the room unit 3b essentially correspond

3 «of the bed combination 5 shown in Fig. 4, with the The difference is that the reset receiver 26 is omitted and the paging receiver 16 takes over the reset. The paging receiver 16 is connected to the paging clock receiver 28 for this purpose and takes from it the sync signal. The door combination of the room unit 3b corresponds essentially to that Door combination 7 from FIG. 5. Here too, the paging receiver 16 'takes on the function of the reset receiver 26. In addition, a reset generator is connected to the receiving part 19, via the the nurse actuate the reset receiver 226 in FIG. 13 when disconnecting the auxiliary inquiry can.

In addition 12 sheets of drawings

Claims (19)

Patent claims: 1. Communication system for hospitals for the transmission of communication signals between sub-units of at least one group of room units and a control center via a high-frequency line common to the group, each room unit being assigned a room unit address signal with a high-frequency identification, which serves as a carrier for sub-unit address signals and / or control signals, characterized in that in the control center (2a) for receiving the room unit address signals, the sub-unit address signals or the control signals, at least one switching device coupled to the high-frequency line (1) with the aid of a continuously switching device (Figs. 11, 151, 153; Figs. 12,167,168,169) in a predetermined sequence one after the other to the high frequencies of the individual room units (3a) tunable high frequency tuning receiver (Fig. 11,150; Fig. 12161) is provided, the necessary for the coordination to the individual high frequencies overlay frequencies one after the other from one of the switching devices (Fig. 11,151,153; Fig. 12, 167, 168, 169) controlled, the superimposition frequencies from a frequency synthesizer (Fig. 12, 165) supplied by a standard frequency generator (Fig. 12, 166) can be supplied so that the sub-units (5, 7) of the individual room units (3a ) Subunit address signals and / or control signals from a sequence of subunit address signals and / or control signals that are repeated in each room unit (3a) and transmit these subunit address signals and / or control signals to the high-frequency tuning receiver (Fig. 11, 150; Fig. 12,161) The decoding device (Fig. 6, 51, 53, 64; Fig. 12, 173, 177, 182, 202) detecting the high frequencies of the room unit address signals as well as one of the decoding device (Fig. 6, 51, 53, 64; Fig. 12, 173, 177, 182) , 202) controlled reception evaluation device which displays the address information of the address signals and / or can be actuated according to the control signals (Fig. 6, 111; Fig. 11, 154; Fig. 12, 174 to 176,183,200,201) is connected downstream so that the control center (2a) continues to transmit speech signals and / or subunit address signals and / or control signals at least one high-frequency tuning transmitter coupled to the high-frequency line (Fig. 12, 186), the transmission frequency of which can be selected from the high-frequency frequencies of the room units (3a) is tunable, and has at least one further high-frequency tuning receiver (Fig. 12, 187) coupled to the high-frequency line (la) for receiving voice signals and / or control signals, the high-frequency tuning transmitter (186) and the further high-frequency tuning receiver (187 ) are matched to the characteristic high frequencies of the same room unit (3a) μ and a transmitter (Fig. 5, 18) and a receiver (Fig. 5.19) are connected to the high-frequency line (Ια) in the room units (3 «), their high-frequency transmission and reception each have the same frequency spacing. 2. Message system according to claim 1, characterized in that in the case of subunit address signals and / or control signals generated by a low frequency oscillation with a subunit address low frequency or a Control low frequency are formed, the decoding device of the center (2a) selectively depending on a subunit address low frequency or control low frequency coordinated, the reception evaluation device (Fig. 6,111) controlling low-frequency individual receivers (Fig. 6, 51, 53, 64) or at least one in succession to the subunit address low frequencies and / or control low frequencies which can be tuned and which control the reception evaluation device Having low frequency tuning receiver. 3. Message system according to claim 1, characterized in that in the case of subunit address signals and / or control signals, which are formed by a code pulse sequence, the decoding device the center (2a) at least one of a plurality of subunits (5, 7) common, the reception evaluation device (174 to 176, 183, 200, 201) according to FIG Kodo pulse train controlling decoder receiver (173, 182) (Fig. 12). 4. Message system according to claim 3, characterized in that the center (2a) a Outputs the synchronous signal to the high-frequency line (la), which is generated by the sub-units (5, 7) Code pulse sequence with the switching cycle of the switching device (151, 153; 167, 168, 169) synchronized (Fig. 11, 12). 5. Message system according to claim 3 or 4, characterized in that the subunits (5,7) emit the coding pulse sequence superimposed on a low frequency and that the low frequency a plurality of subunits (5, 7) is common. 6. Message system according to one of claims 1 to 5, characterized in that the Reception evaluation device (174, 175, 176, 183, 200, 201) for each room unit (3a) and / or each sub-unit (5,7) of a room unit (3a) has its own display signal device (174, 175,176,183,200,201) with a memory (175) has, the possibly present transmission of the room unit address signal and / or the Stores subunit address signal and / or the control signal even after it has ceased (Fig. 12). 7. Message system according to one of claims 1 to 5, characterized in that the Reception evaluation device (90; 93, 95, 101) the transmission of the room unit address signals and / or the subunit address signals and / or the control signals on the identification radio frequencies of the room units (3a) and that a common display device (91, 107) any room unit address signals and / or sub-unit address signals present and / or control signals from the reception evaluation device (90; 93, 95, 101) reads and displays (Fig. 1, 6). S. message system according to claim 7, that characterized in that the reception evaluation device (90; 93,95,101) has a computing device (104,105) which includes a room unit counting system, about one on counting the room units (3a) in the order of their Counting system based on high frequencies, in another, for example on continuous counting of the Room units (3a) or groups in the building based counting system converted, wöbe; the Room unit address signals are displayed after the last counting system (Figs. 1, 6). 9. Message system according to one of claims 6 to 8, characterized in that the Reception evaluation device (90; 174,175,183, 200, 201) to identify the room unit address signals and / or the Sub-unit address signals assigned priority identification signals by a Priority checking device (62; 182, 196, 198) certain, highest in the order of priority, shows stored address signal temporally preferentially (Fig. 6) or one of the respective display devices (174,175,176) associated highlighting circuit, such as a flicker circuit (176) switches on, which switches on the stored signal which is highest in the order of precedence Indicates flickering of a signal device (174) highlighted (Fig. 12). 10. Message system according to claim 9, that 'by gekennzeknung that the sub-units (5, 7) the ranking identification signal to the Subunit address low frequency and / or output the control low frequency modulated. 11. Message system according to claim 9, characterized in that the sub-units (5, 7) the ranking flag signal as a code pulse train modulated onto a low frequency output and that the low frequency of a plurality of subunits (5, 7) is common. 12. Message system according to one of the claims 1 to 11, characterized in that in the room units (3a) to produce a die Transmitting high frequency and the receiving high frequency determining the superimposition frequency Frequency synthesizers are provided, which take the beat frequency from the over the High-frequency line (Ια) supplied standard frequency of the standard frequency generator (Fig. 12, 166). i 3. Message system according to one of claims 1 to 12, characterized in that a first and a second search transceiver (74, 77) connected to a radio frequency line (la) are that a transmitter (76) of the first search transceiver (74) with a receiver (73) of the second search transceiver (77) and a receiver (75) of the first search transceiver (74) with a transmitter (79) of the second search transceiver (77) on the low-frequency side are each connected via a low-frequency line (80), with one * '-'-side query from one Room unit (3a) in another a transmission frequency and a reception frequency of the first as well of the second search transceiver (74, 77) to the reception identification frequency and the transmission identification frequency the one and the other room unit (3a) is set (Fig. 9, 13). 14. Message system according to claim 13, characterized characterized in that to the receiver (756, 78b) and the transmitter (76b, 79b) of the first and a frequency synthesizer (217, 222) each connected to the second search transceiver (74b, 77b) is, which is a high-frequency superimposition frequency which determines the reception and transmission frequency releases (Fig. 13). 15. Message system according to claim 14, characterized in that the room unit address signals interrogating room units (3a) the high frequencies to be emitted from the frequency synthesizer (217, 222) (Fig. 13). 16. Message system according to one of claims 1 to 15, characterized in that a Additional equipment center (66.69 to 72) to the high frequency line (1) connected to the one transmitted with the room unit address signal Additional control signals from additional devices (6) each connected to a sub-unit (5, 7), selectively responds and via their part to the subunits (5, 7) output subunit address signalsc and / or additional control signals which switch on additional devices (6) and retrieve information (FIG. 8). 17. Message system according to one of claims 1 to 16, characterized in that the High-frequency line (Ια) at prepared points connection devices for an additional high-frequency transmitter and / or has an additional high frequency receiver that has an additional high frequency enable the transmission of data signals and / or control signals and / or a voice connection as an address signal. 18. Message system according to claim 17, characterized in that in the center (2a) to at least one additional high-frequency receiver at least one recording device for about Voice or data is connected. 19. Message system according to one of claims 1 to 18, characterized in that in the Central (2 ″) a switching device is provided, the intrusion of telephone calls a voice connection established by room unit address signals and sub-unit address signals between the central unit (2a) and the room units (3a) or sub-units (5, 7) allowed.