Radio alarm system
First Claim
1. A radio alarm system with back up capability having electric circuits for monitoring, controlling, operating and utilizing an electric circuit having electrical conductors including normally closed switches, said radio alarm system comprisingrelay means having electrical conductors;
- a source of electrical energy;
a radio transmitter for transmitting radio signals; and
electrically conductive leads electrically connecting the relay means, the source of electrical energy and the radio transmitter in a back up circuit in a manner whereby the relay means is energized by electrical conductors of the electric circuit having normally closed switches and maintains said relay means normally open as long as said radio alarm system is in operative condition and when an electrical conductor of said radio alarm system is open-circuited, said relay means is deenergized and closes the back up circuit to actuate the transmitter to transmit radio signals indicating that an electrical conductor of a closed circuit of said radio alarm system has been open-circuited, said closed circuit of said radio alarm system and said back up circuit constituting different circuits.
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Accused Products
Abstract
Electrically conductive leads of a radio alarm system electrically connect a relay, a source of electrical energy and a radio transmitter in a back up circuit. The relay is energized by electrical conductors of an electric circuit of the radio alarm system having switches, and maintains the relay normally open as long as the radio alarm system is in operative condition. When an electrical conductor of the radio alarm system is open-circuited, the relay is deenergized and closes the back up circuit to actuate the transmitter to transmit radio signals indicating that an electrical conductor of a closed circuit of the radio alarm system has been open-circuited.
14 Citations
18 Claims
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1. A radio alarm system with back up capability having electric circuits for monitoring, controlling, operating and utilizing an electric circuit having electrical conductors including normally closed switches, said radio alarm system comprising
relay means having electrical conductors; -
a source of electrical energy; a radio transmitter for transmitting radio signals; and electrically conductive leads electrically connecting the relay means, the source of electrical energy and the radio transmitter in a back up circuit in a manner whereby the relay means is energized by electrical conductors of the electric circuit having normally closed switches and maintains said relay means normally open as long as said radio alarm system is in operative condition and when an electrical conductor of said radio alarm system is open-circuited, said relay means is deenergized and closes the back up circuit to actuate the transmitter to transmit radio signals indicating that an electrical conductor of a closed circuit of said radio alarm system has been open-circuited, said closed circuit of said radio alarm system and said back up circuit constituting different circuits. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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2. A radio alarm system with back up capability having electric circuits for monitoring, controlling, operating and utilizing an electric circuit having electrical conductors including normally open switches, a negative electrical conductor and a positive electrical conductor, said radio alarm system comprising
relay means having electrical conductors; -
a source of electrical energy; a radio transmitter for transmitting radio signals; and electrically conductive leads electrically connecting the relay means, the source of electrical energy and the radio transmitter in a back up circuit in a manner whereby the relay means is energized by electrical conductors of the electric circuit having normally open switches and maintains said relay means normally open as long as said radio alarm system is in operative condition and when a negative electrical conductor of said radio alarm system is short-circuited with a positive electrical conductor of said radio alarm system, said relay means is deenergized and closes the back up circuit to actuate the transmitter to transmit radio signals indicating that an electrical conductor of said radio alarm system has been short-circuited, said short-circuited circuit of said radio alarm system and said back up circuit constituting different circuits.
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Specification