Alarm retransmission system

Claim 2

An alarm retransmission system for use in a McCulloh circuit for presignaling a selected receiver unit by a first signal and subsequently providing additional data by a second signal to the selected receiver unit comprising: first means for transmitting a basic signal at a preselected frequency in response to an alarm event; a command unit electrically connected to said first means capable of modulating the basic signal at a plurality of predetermined frequencies thereby forming a first signal; a coder unit electrically connected to said first means capable of modulating the basic signal in a code thereby forming a second signal, said code being indicative of the origin of the alarm event; a plurality of receiver units, each of said receiver units being connected in series in a single circuit, each of said receiver units being adapted to receive the first signal and the second signal; a tone module electrically connected in each of said receiver units, each of said tone modules having a different frequency range corresponding to a predetermined frequency output of said command unit; and a gate unit for receiving the additional data, electrically coupled with each of said tone modules in each of said receiver units and activated in response to the second signal within a predetermined time after the appropriate first signal has been received by said appropriate receiver unit, said appropriate receiver unit including said tone module of the corresponding frequency range as the preselected frequency of said command unit.

Claim 3

An alarm retransmission system as in claim 1 wherein said first means is an oscillator.

Claim 4

An alarm retransmission system as in claim 2 wherein said oscillator transmits a basic signal of 15 Hz.

Claim 5

An alarm retransmission system as in claim 1 wherein said coder unit is a Gamewell Coder.

Claim 6

An alarm retransmission system of claim 1 wherein said coder unit modulates the basic signal at a frequency outside the frequency range of all of said tone modules.

Claim 7

An alarm retransmission system for use in a McCulloh circuit for presignaling a selected receiver unit by a first signal and subsequently providing additional data by a second signal to the selected receiver unit comprising: first means for transmitting a first signal on a circuit in response to an alarm location, said first signal comprising a first carrier signal modulated at a predetermined frequency; second means for transmitting a second signal on the same circuit, said second signal comprising a second carrier signal modulated in accordance with a code, the code being indicative of the alarm location; a plurality of receiver units being connected in series in the same circuit, each of said receiver units including a tone module of a preselected frequency range, each of said tone modules having a unique preselected frequency range; aNd a gate unit for receiving the additional data, electrically coupled to each of said tone modules in each of said receiver units, said gate unit being activated in response to said second signal only within a predetermined time after transmission of said first signal at the predetermined frequency corresponding to the frequency range of said tone module associated with said gate unit.

Claim 8

An alarm retransmission system for use in a McCulloh circuit for presignaling a selected receiver unit by a first signal and subsequently providing additional data by a second signal to the selected receiver unit comprising: first means for transmitting a first signal on a circuit in response to an alarm location, said first signal comprising a first carrier signal modulated at a predetermined frequency; second means for transmitting a second signal on the same circuit, said second signal comprising a second carrier signal modulated in accordance with a code, the code being indicative of the alarm location; a plurality of receiver units being connected in series in the same circuit, each of said receiver units including a tone module of a preselected frequency range, each of said tone modules having a unique preselected frequency range; aNd a gate unit for receiving the additional data, electrically coupled to each of said tone modules in each of said receiver units, said gate unit being activated in response to said second signal only within a predetermined time after transmission of said first signal at the predetermined frequency corresponding to the frequency range of said tone module associated with said gate unit.

Claim 9

An alarm retransmission system as in claim 6 wherein said first and second means are oscillators.

Claim 10

An alarm retransmission system as in claim 6 wherein each second means modulates the second signal at a frequency outside the range of all of said tone modules.

Claim 11

An alarm retransmission system for use in a McCulloh circuit for presignaling a selected receiver unit by a first signal and subsequently providing additional data by a second signal to the selected receiver unit comprising: first means for transmitting a first basic signal at a preselected frequency in response to an alarm event; a command unit electrically connected to said first means and capable of modulating the first basic signal at a plurality of predetermined frequencies, thereby forming a first signal, each predetermined frequency of said command unit corresponding to a particular location on the McCulloh circuit; a Gamewell Coder unit electrically connected to said first means capable of modulating a second basic signal in a code thereby forming a second signal, said code being representative of the location of the origin of the alarm event; a plurality of receiver units, each of said receiver units connected in series at particular locations in the McCulloh circuit, each of said receiver units adapted to receive the first and second signals; a tone module having a predetermined frequency range, electrically connected in each of said receiver units, each tone module having a frequency range determined by the location of said receiver unit, and corresponding to a frequency of said command unit; and a gate unit for receiving the additional data electrically coupled to each of said tone modules and activated by the first signal when modulated at the frequency indicative of the location of the tone module and remaining activated within a predetermined time after the first signal in response to the second signal after being initially activated.

Claim 12

An alarm retransmission system for use in a McCulloh circuit for presignaling a selected receiver unit by a first signal and subsequently providing additional data by a second signal to the selected receiver unit comprising: first means for transmitting a first basic signal at a preselected frequency in response to an alarm event; a command unit electrically connected to said first means and capable of modulating the first basic signal at a plurality of predetermined frequencies, thereby forming a first signal, each predetermined frequency of said command unit corresponding to a particular location on the McCulloh circuit; a Gamewell Coder unit electrically connected to said first means capable of modulating a second basic signal in a code thereby forming a second signal, said code being representative of the location of the origin of the alarm event; a plurality of receiver units, each of said receiver units connected in series at particular locations in the McCulloh circuit, each of said receiver units adapted to receive the first and second signals; a tone module having a predetermined frequency range, electrically connected in each of said receiver units, each tone module having a frequency range determined by the location of said receiver unit, and corresponding to a frequency of said command unit; and a gate unit for receiving the additional data electrically coupled to each of said tone modules and activated by the first signal when modulated at the frequency indicative of the location of the tone module and remaining activated within a predetermined time after the first signal in response to the second signal after being initially activated.

Claim 13

An alarm retransmission system as in claim 9 wherein said Gamewell Coder modulates the second signal at a frequency outside the range of all said tone modules.

Claim 14

An alarm retransmission system as in claim 9 wherein said first means is an oscillator operating at a frequency of 15 hertz.