Remotely actuated telephone alarm system

Details Remotely actuated telephone alarm system Remotely actuated telephone alarm system

1978-05-22

1980-08-26

Robinson, Thomas A.

179 2E, 179 90BB, H04M 1104

Patent

active

042196981

ABSTRACT:
An alarm system that couples into a telephone system serviced by Touch Tone.RTM. equipment or Touch Tone.RTM. equipment intermixed with digital dialing and which when actuated automatically dials a telephone number and delivers a message into the receiver of the telephone whose number has been dialed. The alarm system is made up of two parts, an emergency transmitter unit and a receiver-dialer unit. The emergency transmitter unit includes a small battery powered radio frequency transmitter. The receiver-dialer unit includes a radio frequency receiver, a magnetic tape transport and a coupling device for coupling the unit into a telephone voice pair. The magnetic tape transport contains a magnetic tape on which is recorded a series of audio frequency tones corresponding to the Touch Tone.RTM. combinations of the number to be dialed and a message which is to be delivered. When the emergency transmitter unit is activated it sends out an RF signal which is received by the receiver-dialer unit. Receipt of the signal by the receiver-dialer unit activates the magnetic tape transport and causes the unit to be accessed into a telephone voice pair. Two embodiments of the receiver-dialer unit are disclosed. In one embodiment, the magnetic tape transport is designed to operate solely in a playback mode; whereas in a second embodiment the magnetic tape transport is designed to operate in either a playback or record mode.

REFERENCES:
patent: 3128351 (1964-04-01), Hohmann, Jr. et al.
patent: 3560657 (1971-02-01), Stone et al.
patent: 3618060 (1971-11-01), Nina
patent: 3683114 (1972-08-01), Egan et al.
patent: 3710024 (1973-01-01), Lacey
patent: 3843841 (1974-10-01), Rubinstein
patent: 4007333 (1977-02-01), Marheine

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