Neighborhood home security system

A backup security system for the telephone company lines of a protected home located in a neighborhood of individual homes wherein all the homes have external a.c. supply lines connected to a common power transformer and each of the homes has its own external telephone company lines, said system comprising:

• a line-cut monitor in the protected home for providing a signal when the external telephone company lines for the protected home have been cut;
• an alarm panel in the protected home for providing a signal when an intruder breaks therein;
• a transmitter means in the protected home responsive to the signals from the line-cut monitor and the alarm panel for providing high frequency electrical signals on the a.c. supply lines;
• and
• a receiver means and an automatic telephone communicator in one of the other homes in the neighborhood selected to serve as a backup home;
• said receiver means responding to the high frequency electrical signals on the a.c. supply lines and providing a signal to said automatic telephone communicator to seize the telephone company lines for the backup home and send a message informing a central station that an intruder has broken into the protected home.

A backup security system for the telephone company lines of a protected home located in a neighborhood of individual homes wherein all the homes have external a.c. supply lines connected to a common power transformer and each of the homes has its own external telephone company lines, said system comprising:

• a sensor means in the protected home for providing a signal when the telephone company lines for the protected home are inoperable;
• security means in the protected home for providing a signal when emergency assistance is needed;
• a transmitter means in the protected home responsive to the signal from the security measn when the sensor means provides a signal to transmit high frequency electrical signals on the a.c. supply lines;
• and
• a receiver means and an automatic telephone communicator located in another home in the neighborhood selected to serve as a backup home;
• said receiver means responding to the high frequency electrical signals on the a.c. supply lines and providing a signal to said automatic telephone communicator to seize the telephone company lines for the backup home and send a message informing a central station that emergency assistance is needed in the protected home.

A backup security system for the telephone company lines of a protected home located in a neighborhood of individual homes wherein all the homes have external a.c. supply lines connected to a common power transformer and each of the homes has its own external telephone company lines, said system comprising:

• a line-cut monitor in the protected home for providing a signal when the telephone company lines for the protected home have become inoperable;
• security means in the protected home for generating an alarm signal when the protected home has been broken into by an intruder;
• a transmitter means in the protected home;
• a gating means responsive to said signal from the line-cut monitor for gating said alarm signal into said transmitter means;
• said transmitter means providing for transmitting width modulated bursts of high frequency electrical signals corresponding to an address of said protected home and the alarm signal on said a.c. supply lines;
• and
• a receiver means and an automatic telephone communicator in any other home in said neighborhood selected for use as a backup home;
• said receiver means storing the address of said protected home;
• and
• said receiver means responding to the width modulated bursts of high frequency electrical signals on the a.c. supply lines and when the address stored therein compares with the address of the protected home providing a digital alarm signal on the output thereof;
• said automatic telephone communicator responding to the digital alarm signal to seize the telephone company lines for the backup home to send out a message informing a central station that the protected home has been broken into by an intruder.

A backup security system for the telephone company lines of each of a plurality of protected homes located in a neighborhood of individual homes wherein all the homes have external a.c. supply lines connected to a common power transformer and each of the individual homes has its own external telephone company lines, said system comprising:

• an automatic telephone communicator means and a receiver means located in a backup home provided in the neighborhood for each protected home, each said receiver means storing an address signal of the protected home;
• a line-cut monitor in each protected home for providing a signal when the external telephone company lines for the protected home have been cut;
• a transmitter means in each protected home responsive to the signal from the line-cut monitor therein for providing electrical signals on the a.c. supply lines, said electrical signals including the address signal of the protected home and the signal from the line-cut monitor;
• said receiver means in each said backup home responding to said electrical address signal transmitted on the a.c. supply lines and upon comparison with the address signal stored therein causes the automatic telephone communicator means in said backup home to seize the telephone company lines therefor and send an emergency message to a central station advising that the telephone company lines for the protected home have been cut.

A backup security system for a protected home located in a neighborhood of individual homes wherein all the homes have external a.c. supply lines connected to a common power transformer and each of the homes has its own external telephone company lines, said system comprising:

• an alarm panel, a first automatic telephone communicator, a line-cut monitor, and a transmitter means at the protected home;
• a receiver means and a second automatic telephone communicator at a neighboring home in the neighborhood selected to serve as a backup home;
• said line-cut monitor providing a signal when the external telephone company lines at the protected home have been cut;
• said alarm panel operable when an intruder breaks into the protected home and the line-cut monitor does not provide a signal indicating the telephone company lines for the protected home have been cut to provide a signal to said first automatic telephone communicator causing it to seize the telephone company lines at the protected home and send a message informing a central station of the intrusion into the protected home;
• said alarm panel operable when an intruder breaks into the protected home and line-cut monitor provides a signal indicating the telephone company lines for the protected home have been cut to provide a signal to said transmitter means causing it to transmit high frequency electrical signals on the a.c. supply lines;
• and
• said receiver means at the neighboring home responding to the high frequency electrical signals on the a.c. supply lines to provide a signal to said second automatic telephone communicator causing it to seize the telephone company lines at the neighboring home and send a message informing the central station of the intrusion into the protected home.