Energy-saving ballast for electric gas discharge lamps
First Claim
1. In a ballast for operating one of a high-pressure sodium-vapor and a mercury-vapor lamp from a source of electric power, the ballast having a first one of a condenser and an inductor connected to be in series between the lamp and the source of electric power, the improvement comprising:
- a second of the one of the condenser and inductor connected in a path that is connected in parallel with the first one of the condenser and inductor;
a timer for providing a predetermined time;
connecting means for connecting the timer to the source of electric power; and
a relay in the path for closing the pat, the timer providing the predetermined time only to the relay for opening the path;
whereby the electric power consumed by the ballast for operating the lamp is reduced when the relay has opened the path.
1 Assignment
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Accused Products
Abstract
In a ballast for operating one of a high-pressure sodium-vapor and a mercury-vapor lamp from a source of electric power, the ballast has a first one of a condenser and an inductor connected to be in series between the lamp and the source of electric power. A second of the one of the condenser and inductor is connected in a path that is connected in parallel with the first one of the condenser and inductor. A timer is connected to the source of electric power and a relay is in path for closing the path, the timer providing a predetermined time only to the relay for opening the path, whereby the electric power consumed by the ballast for operating the lamp is reduced when the relay has opened the path.
6 Citations
20 Claims
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1. In a ballast for operating one of a high-pressure sodium-vapor and a mercury-vapor lamp from a source of electric power, the ballast having a first one of a condenser and an inductor connected to be in series between the lamp and the source of electric power, the improvement comprising:
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a second of the one of the condenser and inductor connected in a path that is connected in parallel with the first one of the condenser and inductor; a timer for providing a predetermined time; connecting means for connecting the timer to the source of electric power; and a relay in the path for closing the pat, the timer providing the predetermined time only to the relay for opening the path; whereby the electric power consumed by the ballast for operating the lamp is reduced when the relay has opened the path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification