Gas light system and method
AssigneeJohn W. Kunze
InventorJohn W. Kunze
Life of this patent
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Abstract
A writing gas light system has a gas tube with a first end and a second end. A first cathode is attached to a first end of the gas tube and a second cathode is attached to a second end of the gas tube. An isolated conductor runs along a length of the gas tube and is electrically attached to the second cathode. A light ballast is coupled to the first cathode and to the isolated conductor. In one embodiment, the system has a digitally controlled ballast. The gas discharge ballast has an output applied to the gas tube whose energy can be adjusted. The system has a balanced center tap transformer. The secondary of the transformer is tied to ground through a ground fault detection circuit.
Claims6
A writing gas light system, comprising:
- a gas tube having a first end and a second end, a first cathode at a first end of the gas tube and a second cathode at a second end of the gas tube;
- an isolated conductor running along a length of the gas tube and directly electrically connected to the second cathode;
- and
- a light ballast coupled to the first cathode and to the isolated conductor, and comprising a variable output DC voltage supply, and a pulse width modulated high voltage supply connected to the variable output DC voltage supply;
- wherein the light ballast has a variable output voltage and a variable duty cycle.
Dependencies are inferred from the claim text.