EMERGENCY WARNING AND IDENTIFICATION APPARATUS FOR TWO-WAY RADIO COMMUNICATION SYSTEM
First Claim
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1. Signal generating and processing apparatus usable in an audio communication system in which a plurality of signal generators each generate a signal having at least identifying and predetermined condition indicating components for transmission to a remote station signal and a second continuous wave frequency component of controllable duration, the received signal is processed to identify the originator of the signal and the respective condition of each originator, comprising:
- signal generating apparatus associated with each originator, comprising;
a. a manually adjustable switch having a first position for indicating a nonemergency transmit condition and a second position for indicating an emergency condition;
b. means responsive to the positions of said switch for generating a first continuous wave frequency signal whose duration is substantially coextensive with the duration of a developed output signal;
c. means responsive to the positions of said switch and to a developed gating signal for generating a second continuous wave frequency signal of controllable duration, said first and said second continuous wave frequencies comprising a unique combination for permitting identification of said signal generating apparatus at a remote station;
d. gating circuitry means for developing said gating signal responsive to the positions of said switch for causing said second generating means to generate the second continuous wave frequency signal having a greater duration for said second switch position than for said first switch position so that emergency and nonemergency transmit conditions are distinguishable at the remote station, and e. means responsive to said first and second continuous wave frequency signals and a supplied third signal capable of having audio components, for mixing said three signals for generating an output signal for transmission to the remote station; and
signal processing apparatus associated with a remote station, comprising;
a. frequency separating means responsive to a unique combination of continuous wave frequency components in the signal received from an originator, including first and second filtering and detecting circuits for respectively separating said first and second continuous wave frequency components, and an AND circuit coupled to the first and second detecting circuits for developing a first signal for identifying said originator, said first signal additionally being representative of the duration of said continuous wave frequency components, and b. means responsive to said first signal for developing a second signal for indicating the duration of said controllable continuous wave frequency signal relative to a prescribed duration, the exceeding or nonexceeding of said prescribed duration corresponding to the existence of an emergency or nonemergency transmit condition, respectively, at the originator.
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Abstract
Apparatus for audio communications and other such systems are disclosed in which a plurality of portable transceivers each generate a signal having audio components and a unique combination of continuous wave frequency components, for transmission to a remote station. Manual operation of a multiposition switch in each transceiver permits indicating the existence of an emergency or nonemergency transmit condition by controlling the duration of one of the continuous wave frequency components. The transmitted signal is received at the remote station where circuitry filters and detects the unique combination of continuous wave frequency components to identify the transceiver and also determines the duration of the controllable duration component to indicate the particular transceiver'"'"''"'"'s condition. Other embodiments are also covered.
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Citations
5 Claims
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1. Signal generating and processing apparatus usable in an audio communication system in which a plurality of signal generators each generate a signal having at least identifying and predetermined condition indicating components for transmission to a remote station signal and a second continuous wave frequency component of controllable duration, the received signal is processed to identify the originator of the signal and the respective condition of each originator, comprising:
- signal generating apparatus associated with each originator, comprising;
a. a manually adjustable switch having a first position for indicating a nonemergency transmit condition and a second position for indicating an emergency condition;
b. means responsive to the positions of said switch for generating a first continuous wave frequency signal whose duration is substantially coextensive with the duration of a developed output signal;
c. means responsive to the positions of said switch and to a developed gating signal for generating a second continuous wave frequency signal of controllable duration, said first and said second continuous wave frequencies comprising a unique combination for permitting identification of said signal generating apparatus at a remote station;
d. gating circuitry means for developing said gating signal responsive to the positions of said switch for causing said second generating means to generate the second continuous wave frequency signal having a greater duration for said second switch position than for said first switch position so that emergency and nonemergency transmit conditions are distinguishable at the remote station, and e. means responsive to said first and second continuous wave frequency signals and a supplied third signal capable of having audio components, for mixing said three signals for generating an output signal for transmission to the remote station; and
signal processing apparatus associated with a remote station, comprising;
a. frequency separating means responsive to a unique combination of continuous wave frequency components in the signal received from an originator, including first and second filtering and detecting circuits for respectively separating said first and second continuous wave frequency components, and an AND circuit coupled to the first and second detecting circuits for developing a first signal for identifying said originator, said first signal additionally being representative of the duration of said continuous wave frequency components, and b. means responsive to said first signal for developing a second signal for indicating the duration of said controllable continuous wave frequency signal relative to a prescribed duration, the exceeding or nonexceeding of said prescribed duration corresponding to the existence of an emergency or nonemergency transmit condition, respectively, at the originator.
- signal generating apparatus associated with each originator, comprising;
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2. Signal processing apparatus usable in an audio communication system for processing received signals having a first continuous wave frequency component whose duration is substantially coextensive with the duration of said received signal, and a second continuous wave frequency component of controllable duration, for identifying the originator of said received signals and the condition of said originator, comprising:
- frequency separating means responsive to a unique combination of continuous wave frequency components in the received signal, including first and second filtering and detecting circuits for respectively separating said first and second continuous wave frequency components, and an AND circuit coupled to the first and second detecting circuits for developing, upon coincidence of the first and second continuous wave frequency components, a first signal for identifying the originator of Said received signal; and
means responsive to said first signal for developing a second signal for indicating the duration of said controllable continuous wave frequency signal relative to a prescribed duration, the exceeding or nonexceeding of said prescribed duration corresponding to the existence of an emergency or nonemergency transmit condition, respectively, at the originator.
- frequency separating means responsive to a unique combination of continuous wave frequency components in the received signal, including first and second filtering and detecting circuits for respectively separating said first and second continuous wave frequency components, and an AND circuit coupled to the first and second detecting circuits for developing, upon coincidence of the first and second continuous wave frequency components, a first signal for identifying the originator of Said received signal; and
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3. Signal generating apparatus usable in a two-way radio communication system for generating a signal having at least identifying and predetermined condition indicating components for transmission to a remote station, comprising:
- continuous wave frequency generating means for generating a unique combination of continuous wave frequency signals, including a first continuous wave frequency generator for generating a first continuous wave frequency signal and a second continuous wave frequency generator for generating a second continuous wave frequency signal of controllable duration, said signals combining to form a unique signal combination permitting identification at the remote station of the signal generating apparatus and the indication of an emergency condition at said station without audio communication from said signal generating apparatus;
a manually adjustable multiposition control switch having a first position for indicating a nonemergency transmit condition and a second position for indicating an emergency condition, for causing said continuous wave frequency generating means to generate first and second continuous wave frequency signals of different duration, different durations of said continuous wave signals corresponding to said different predetermined conditions;
gating circuitry means responsive to said first and second switch positions, for causing said second continuous wave frequency generating means to generate a second continuous wave signal having a greater duration for said second switch position than for said first switch position, so that emergency and nonemergency transmit conditions are thereby distinguishable at the remote station; and
a modulator, responsive to said first and second continuous wave frequency signals and a supplied third signal capable of having audio components, for mixing said three signals for generating an output signal for transmission to the remote station.
- continuous wave frequency generating means for generating a unique combination of continuous wave frequency signals, including a first continuous wave frequency generator for generating a first continuous wave frequency signal and a second continuous wave frequency generator for generating a second continuous wave frequency signal of controllable duration, said signals combining to form a unique signal combination permitting identification at the remote station of the signal generating apparatus and the indication of an emergency condition at said station without audio communication from said signal generating apparatus;
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4. Signal processing apparatus usable in a two-way radio communication system for processing received signals having a unique combination of controllable duration continuous wave frequency components, for identifying the originator of said received signals and the condition of said originator, comprising:
- frequency separating means responsive to said unique combination of continuous wave frequency components in the received signal, said signal having a first continuous wave frequency component whose duration is substantially coextensive with the duration of said received signals and a second continuous wave frequency component of controllable duration, for generating a third signal for identifying the originator of said received signal, said first signal additionally being representative of the duration of said continuous wave frequency components, said frequency separating means including first and second filtering and detecting circuits for respectively separating said first and second continuous wave frequency components, and a coincidence circuit coupled to the first and second detecting circuits for developing said first signal upon coincidence of said first and second continuous wave frequency components; and
means responsive to said first signal for generating a second signal for indicating the condition of the originator of said received signal, different durations of said continuous wave frequency components corresponding to different predetermined conditions.
- frequency separating means responsive to said unique combination of continuous wave frequency components in the received signal, said signal having a first continuous wave frequency component whose duration is substantially coextensive with the duration of said received signals and a second continuous wave frequency component of controllable duration, for generating a third signal for identifying the originator of said received signal, said first signal additionally being representative of the duration of said continuous wave frequency components, said frequency separating means including first and second filtering and detecting circuits for respectively separating said first and second continuous wave frequency components, and a coincidence circuit coupled to the first and second detecting circuits for developing said first signal upon coincidence of said first and second continuous wave frequency components; and
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5. Signal processing apparatus usable in a two-way radio communication system for processing received signals having unique combinations of controllable duration continuous wave frequEncy components, for identifying the originator of the received signal and the condition of said originator, comprising:
- frequency separating means responsive to a unique combination of continuous wave frequency components in the received signal, said received signal having a first continuous wave frequency component whose duration is substantially coextensive with the duration of said received signal and a second continuous wave frequncy component of controllable duration, for generating a first signal for identifying the originator of said received signal, said first signal additionally being representative of the duration of said continuous wave frequency component, said frequency separating means including first and second filtering and detecting circuits for respectively separating said first and second continuous wave frequency components, and a coincidence circuit coupled to the first and second detecting circuits for developing said first signal upon coincidence of said first and second continuous wave frequency components; and
means responsive to said first signal for developing a second signal for indicating the duration of said controllable continuous wave frequency component relative to a prescribed duration, the exceeding or nonexceeding of said prescribed duration corresponding to the existence of an emergency or nonemergency transmit condition, respectively, at the originator.
- frequency separating means responsive to a unique combination of continuous wave frequency components in the received signal, said received signal having a first continuous wave frequency component whose duration is substantially coextensive with the duration of said received signal and a second continuous wave frequncy component of controllable duration, for generating a first signal for identifying the originator of said received signal, said first signal additionally being representative of the duration of said continuous wave frequency component, said frequency separating means including first and second filtering and detecting circuits for respectively separating said first and second continuous wave frequency components, and a coincidence circuit coupled to the first and second detecting circuits for developing said first signal upon coincidence of said first and second continuous wave frequency components; and
Specification
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Current AssigneeGerald F. Woodard, William Buehrle Jr
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Original AssigneeGerald F. Woodard, William Buehrle Jr
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InventorsBuehrle, William Jr., Woodard, Gerald F.
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Application NumberUS04/784,034Time in Patent Office890 DaysField of SearchUS Class Current455/521CPC Class CodesH04B 7/26 at least one of which is mo...
