Abstract:
A wireless intercommunicating system includes a base unit connected to a telephone through a telephone line, and a user unit for intercommunication with the base unit by radio signal, the user unit being carried with the user and selectively controlled for use as a radio to receive the broadcasting of a radio broadcast station, or a wireless telephone.

Description:
BACKGROUND OF THE INVENTION 
     The present invention relates to a telephone system, and more particularly to a wireless intercommunicating system which transmits messages by radio signal. 
     U.S. Pat. No. 5,305,370, issued to Kearns et al., discloses an automatic dialing system for use in an emergency case. This dialing system cannot be used as a telephone to receive A.F. signals (Audio Frequency Signal) by radio signal, and therefore it can only be used in an emergency case to automatically dial a particular telephone number. Further, conventional wireless telephone handsets or headphone type wireless handsets do not provide an automatic dialing function. There are known wireless handsets having an automatic dialing function, however these wireless handsets are not suitable for disabled persons, sick persons, or aged persons who cannot move freely. 
     SUMMARY OF THE INVENTION 
     It is the main object of the present invention to provide a wireless intercommunicating system that can be connected to a telephone line for use as a wireless telephone without dialer keypad, so that the user unit of the wireless intercommunicating system can be carried by the user for use as a radio, and a disabled person can use the user unit as a radio, or a mobile telephone that is capable of automatically dialing a particular telephone number when in an emergency. 
     According to one embodiment of the present invention, when a telephone message is received by the base unit and the user unit user is listening to the broadcasting of a radio broadcast station through the user unit, the base unit automatically cuts off the radio function of the user unit, enabling the user unit user to recognize an incoming telephone message. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 illustrates the circuit architecture of a user unit for a wireless intercommunicating system according to the first embodiment of the present invention. 
     FIG. 2 illustrates the circuit architecture of a base unit for a wireless intercommunicating system according to the first embodiment of the present invention. 
     FIG. 3 shows the outer appearance of a user unit for a wireless intercommunicating system according to the first embodiment of the present invention. 
     FIG. 4 illustrates the structural arrangement of the base unit according to the first embodiment of the present invention. 
     FIG. 5 illustrates the circuit architecture of a user unit for a wireless intercommunicating system according to the second embodiment of the present invention. 
     FIG. 6 illustrates the circuit architecture of a base unit for a wireless intercommunicating system according to the first embodiment of the present invention. 
     FIG. 7 is an applied view of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring to FIGS. 1, 2 and 7, a wireless intercommunicating system in accordance with a first embodiment of the present invention is generally comprised of a base unit 10, and a user unit 30. The base unit 10 can be connected to a telephone 80 by a telephone line system 50. The user unit 30 intercommunicates with the base unit 10 for transmitting message and signal to each other by radio signal. 
     Referring to FIG. 3 and FIG. 1 again, the user unit 30 comprises a receiver 31, an antenna 32, a speaker 33, control buttons 34, a control unit 35, an encoder 36, a transmitter 37, and a microphone 38. 
     The receiver 31 receives a radio signal from the base unit 10 or other radio broadcast station through the receiving antenna 32, and converts the received radio signal into a A.F. signal for output through the speaker 33. 
     The control buttons 34 are provided for operation by hand to produce different control signals to the control unit 35. The control unit 35 is comprised of a microprocessor. The control buttons 34 include a listen/stop button 341, a radio control button 342, an auto-dialing control button 343, an auto-answer control button 344, a set of frequency control buttons 345 and a selection control button 346, which are controlled to provide listening, radio, auto-dialing, auto-answer and frequency-adjustment control signals respectively. The selection control button 346 can be set by the user to provide a particularly assigned control signal. For example, when the wireless intercommunicating is connected to a computer 80 through a computer connector 70, the selection control button 346 can be set to control the computer 71. The operation flow of the selection control button 346 is same as the auto-dialing control button 343 (or the auto-answer control button 344). 
     The control unit 35 controls the internal operation of the user unit 30, and receives control signals from the control buttons 34. When the radio control button 342 is pressed on, the user unit 30 is operated as a radio, and the frequency control buttons 345 are operated to select the desired radio broadcast station. When a listening, auto-dialing or auto-answer control signal is received, the control signal is sent to the encoder 36, and then sent by the transmitter 37 to the base unit 10 by radio signal. When the microphone 38 is turned on for communication, the A.F. signal from the user is sent by the antenna 32 to the base unit 10. 
     Referring to FIG. 2 and FIG. 4 again, the base unit 10 comprises a power management circuit 11, a speech network circuit 12, a transmitter 13, an antenna 14, a receiver 15, a decoder 16, a control unit 17, an output port 18, and a telephone connector set 22. 
     The power management circuit 11 manages power supply of the base unit 10. The power management circuit 11 comprises a power indicator 20 which indicates the power supply condition of the base unit 10. 
     The speech network circuit 12 is obtained for example from TEA1062 chip, and connected to line in 51 and line out 52 of a telephone line system 50 through input terminal 221 and output terminal 222 of the telephone connector set 22. for voice input and output. When an incoming A.F. signal comes from line in 51 of the telephone line system 50, it is transmitted by the speech network circuit 12 to the transmitter 13 through the input terminal 221 of the telephone connector set 22, or an outgoing A.F. signal comes from the receiver 15, it is sent by the speech network circuit 12 to line in 51 of the telephone line system 50 through the input terminal 221. 
     The transmitter 13 can receive a A.F. signal from the speech network circuit 12, enabling the received A.F. signal to be sent through the antenna 14 to the user unit 30 by radio signal. 
     The receiver 15 can receive a radio signal from the user unit 30. If the received radio signal is a A.F. signal, it is directly sent to the speech network circuit 12, and then outputted from the speech network circuit 12 to line in 51 of the telephone line system 50. If the received radio signal is a listening, auto-dialing or auto-answer control signal, the control signal is decoded by the decoder 16, and then sent to the base unit 10 for recognition by the control unit 17 of the base unit 10. When recognized, the control unit 17 of the base unit 10 controls the transmitter 13 and the receiver 15 to transmit or receive signal, or outputs an auto dialing control signal (or auto-answer control signal) to the output port 18 subject to the nature of the control signal received. 
     The output port 18 outputs the control signal of the control unit 17 of the base unit 10 to external peripheral apparatus. According to the first embodiment of the present invention, an auto-dialer 19 and, an auto-answer machine 60 are respectively connected to the output port 18. The auto-dialer 19 and the auto-answer machine 60 are connected in series to line out 52 of the telephone line system 50. 
     FIGS. 5 and 6 show a wireless intercommunicating according to a second embodiment of the present invention. This alternate form is similar to the first embodiment of the present invention with the exception of added means. According to this alternate form, the base unit 10 comprises an encoder 21, the user unit 30 comprises a second receiver 39, and a decoder 40. When an incoming A.F. signal is received, the base unit 10 provides a control signal, enabling the control signal to be encoded by the encoder 21 and then sent to the user unit 30. The control signal from the base unit 10 is received by the second receiver 39 of the user unit 30, then decoded by the decoder 40 of the user unit 30 for recognition, so as to inform the user of the incoming A.F. signal. If an A.F. signal comes from the telephone line system 50 when the user uses the user unit 30 to listen to the broadcasting of a radio broadcast station, the control signal of the base unit 10 automatically cuts off the radio function of the user unit 30, notifying the user of the incoming telephone call. 
     The speech network circuit 12 can also link with a dialing keypad 90, so that the user can dial the dialing keypad 90 to call out without using the telephone 80. 
     The receiving/transmitting control circuits 321;141 shown in FIGS. 1;5;2;6 control the antennas 31;14 to receive/transmit signals respectively with minimized power consumption. 
     The aforesaid transmitters, receivers, power management control circuit, speech network circuit, encoders, decoders, control units, receiving/transmitting control circuits, and dialing keypad are of known devices, therefore the related detailed circuit diagrams are not provided. 
     It is to be understood that the drawings are designed for purposes of illustration only, and are not intended as a definition of the limits and scope of the invention disclosed. For example, the user unit 30 may be provided with an indicator, or the base unit 10 may be provided with flash light or a buzzer for indication of an incoming telephone.