Apparatus for communicating receipt of transmitted messages

Details Apparatus for communicating receipt of transmitted messages Apparatus for communicating receipt of transmitted messages

1979-05-21

1982-10-12

Ng, Jin F.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 18, 340539, H04B 100

Patent

active

043542751

ABSTRACT:
An apparatus is provided for communicating to a transmitter or sender of an emergency message a response indicating that the message was received. The communicating apparatus operates in conjunction with a portable alarm unit carried by the sender, a continuous-loop magnetic tape recorder-player, and a local CB radio (i.e., a CB radio located within the range of the portable alarm unit). In response to a signal from the portable alarm unit, the apparatus activates the communicating recorder-player causing it to play a pre-recorded emergency message and to apply this message, in the form of a message signal, to the local CB radio. The local CB radio transmits the message to a listener at a remote CB radio station. In response to a selected acknowledgement message received from a listener via the local CB radio, the communicating apparatus detects the acknowledgement message and transmits a signal to the portable alarm unit indicating receipt by a listener of the emergency message. The communicating apparatus includes a transceiver, a power supply unit, an interface unit, and a listening circuit.

REFERENCES:
patent: 3290597 (1966-12-01), Denny et al.
patent: 3699443 (1972-10-01), Weger
patent: 3723876 (1973-03-01), Seaborn, Jr.
patent: 3914692 (1975-10-01), Seaborn, Jr.
patent: 4107611 (1978-08-01), Holcomb et al.
patent: 4197497 (1980-04-01), Phelps

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