Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1995-05-24
1998-03-17
Swarthout, Brent A.
Communications: electrical
Condition responsive indicating system
Specific condition
340574, 128696, 128903, 128904, G08B 2300, A61B 504
Patent
active
057292035
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE ART
The present invention relates to an emergency call system for transmitting an emergency call of a subscriber to an emergency call center via a communication channel.
BACKGROUND OF THE INVENTION
There is known an emergency call system for transmitting an emergency call of a subscriber to an emergency call center via a communication channel. An example of the emergency call system includes a portable transmitting device of a pendant type which is adapted to be worn on a subscriber and transmits an emergency call signal in response to an operation of a call button by the subscriber, and a signal receiving and call device which receives the radio-wave signal from the portable transmitting device and calls the emergency call center via the communication channel. When the subscriber sends an emergency call to the emergency call center by using the emergency call system as described above, an operator of the emergency call center calls back the subscriber to check that the subscriber is in an abnormal situation, and judges whether an emergency action should be taken for the subscriber. If the operator judges that an emergency treatment should be given to the subscriber, then he or she requests an ambulance car or the like to be sent to the subscriber.
In the conventional emergency call system as described above, the portable transmitting device transmits only an emergency call signal in response to an operation of the call button by a subscriber. Thus, it is very cumbersome for the operator of the emergency call center to check each of a number of emergency calls and judge whether that call really requires an emergency action. Namely, some of the emergency calls resulting from subscriber's operation of the call button of the portable transmitting device are transmitted upon unintentional operation of the call button, transmitted for checking that the call system works properly, or transmitted with just the intention of talking with the operator of the call center.
The present invention has been developed in view of the above-described situation and it is therefore an object of the present invention to provide an emergency call system wherein an operator can easily judge whether an emergency call of a subscriber really requests an emergency action, without needing an additional checking operation.
DISCLOSURE OF THE INVENTION
It is therefore an object of the present invention to provide an emergency call system for transmitting an emergency call of a subscriber to an emergency call center via a communication channel, comprises: (a) a portable transmitting device having a call button which is operable for transmitting the emergency call of the subscriber, a physical information sensor which obtains a physical information of the subscriber, a memory which stores a batch of physical information detected by the physical information sensor for a predetermined time duration, and a signal transmitter which transmits a signal at a predetermined modulation frequency, the portable transmitting device being adapted to be worn on said subscriber, and transmitting from the signal transmitter a signal representing the batch of physical information stored in the memory for the predetermined time duration in response to an operation of the call button; and (b) a signal receiving and call device having a signal receiver which receives the signal transmitted from the signal transmitter of the portable transmitting device, and a communication apparatus which transmits the physical information signal received by the signal receiver to the emergency call center via the communication channel, the signal receiving and call device being disposed in a place where the subscriber is.
In the emergency call system in accordance with the above-described, first aspect of the present invention, the portable transmitting device transmits the signal representing the batch of physical information stored in the memory for the predetermined time duration, in response to the operation of the call button. The signal receiving and
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Oka Tohru
Suzuki Hidenori
Colin Corporation
Swarthout Brent A.
Trieu Van T.
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