Telephone alarm system

Claim 2

An alarm signaling system for calling a predetermined telephone station and transmitting thereto a coded message indicative of an alarm condition as detected by a sensor coupled to the system, said system comprising: control means operative in response to actuation of a sensor to seize a telephone line and connect the alarm signaling system thereto; a signal generator having a first portion for producing telephone calling signals and a second portion for producing coded message signals and including means for generating a sequence of binary numbers; and means for converting said sequence of binary numbers into a first sequence of signals representing the telephone number of a station to be called, and a second sequence of signals representing a message to be transmitted to said called station; timing means operative in response to a signal from said control means to energize the first portion of said signal generator, thereby causing telephone calling signals to be transmitted on said telephone line; detector means operative in response to a first signal transmitted by a called station to energize the second portion of said signal generator, thereby causing message signals to be transmitted on said telephone line; and means operative in response to a second signal transmitted by a called station to reset said control means and to disconnect the system from the telephone line, thereby placing the system in a condition to receive further alarm signals and rendering the telephone line available for other purposes.

Claim 3

An alarm signaling system for calling a predetermined telephone station and transmitting thereto a coded message indicative of an alarm condition as detected by a sensor coupled to the system, said system comprising: control means operative in response to actuation of a sensor to seize a telephone line and connect the alarm signaling system thereto; a signal generator having a first portion for producing telephone calling signals and a second portion for producing coded message signals; timing means operative in response to a signal from said control means to energize the first portion of said signal generator, thereby causing telephone calling signals to be transmitted on said telephone line; detector means operative in response to a first signal transmitted by a called station to energize the second portion of said signal generator, thereby causing message signals to be transmitted on said telephone line; and means operative in response to a second signal transmitted by a called station to reset said control means and to disconnect the system from the telephone line, thereby placing the system in a condition to receive further alarm signals and rendering the telephone line available for other purposes; said signal generator including a binary counter operative to provide a sequence of binary output signals of increasing binary value; a first diode matrix having a plurality of inputs connected to the outputs of said binary counter, and a plurality of matrix outputs, said matrix being operative to produce an output signal on successive ones of said matrix outputs in response to increasing binary counts from said counter; means for transposing the sequence of output signals from said matrix into a predetermined order representing a telephone number and message; and means operative in response to said transposed sequence signals to provide signals of a form suitable to dial a predetermined telephone number.

Claim 4

An alarm signaling system for calling a predetermined telephone station and transmitting thereto a coded message indicative of an alarm condition as detected by a sensor coupled to the system, said system comprising: control means operative in response to actuation of a sensor to seize a telephone line and connect the alarm signaling system thereto; a signal generator having a first portion for producing telephone calling signals and a second portion for producing coded message signals; timing means operative in response to a signal from said control means to energize the first portion of said signal generator, thereby causing telephone calling signals to be transmitted on said telephone line; detector means operative in response to a first signal transmitted by a called station to energize the second portion of said signal generator, thereby causing message signals to be transmitted on said telephone line; and means operative in response to a second signal transmitted by a called station to reset said control means and to disconnect the system from the telephone line, thereby placing the system in a condition to receive further alarm signals and rendering the telephone line available for other purposes; said signal generator including a binary counter operative to provide a sequence of binary output signals of increasing binary value; a first diode matrix having a plurality of inputs connected to the outputs of said binary counter, and a plurality of matrix outputs, said matrix being operative to produce an output signal on successive ones of said matrix outputs in response to increasing binary counts from said counter; means for transposing the sequence of output signals from said matrix into a predetermined order representing a telephone number and message; and means operative in response to said transposed sequence signals to provide signals of a form suitable to dial a predetermined telephone number.

Claim 5

A system according to claim 2 wherein said means operative in response to said transposed sequence signalS is a second diode matrix.

Claim 6

A system according to claim 2 further including a clock adapted to generate telephone system compatible dial pulses, and logic circuitry connected to said clock and operative in response to the output signals from said last-mentioned means to cause said clock to produce dial pulses representing a predetermined telephone number.

Claim 7

A system according to claim 3 further including a multitone oscillator operative in response to the signals from said second diode matrix to provide dual frequency tones of a form to call a predetermined telephone number.

Claim 8

A system according to claim 1 further including means operative a predetermined time after the absence of a first signal from said called station to again energize the first portion of said signal generator to cause telephone calling signals to again be transmitted on said telephone line.