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US 4,728,867 AGranted
Electrodeless low-pressure discharge lamp
AssigneeU.S. Philips Corporation
InventorsPieter Postma, Andreas C. Van Veghel
Life of this patent
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AssigneeU.S. Philips Corporation
InventorsPieter Postma, Andreas C. Van Veghel
Estimating the term…
An electrodeless low-pressure discharge lamp comprising a glass lamp vessel (1) which is sealed in a gas-tight manner and is filled with a metal vapor and a rare gas, this lamp vessel being provided with a tubular protuberance (2) which accommodates a rod-shaped core (3) of magnetic material surrounded by a wire winding (4) connected to a high-frequency supply unit, by means of which during operation of the lamp an electrical discharge is maintained in the lamp vessel, the inner side of the lamp vessel being provided with a transparent conductive layer (10), which is electrically connected by means of a lead-through member (12) to a conductor, such as a metal rod (11) provided in the core (3), located outside the lamp vessel, this lead-through member (12) being located at the end of the tubular protuberance, and being electrically connected to the internal conductive layer, for example by means of a wire spring (15).
An electrodeless low-pressure discharge lamp comprising a glass lamp vessel which is sealed in a gas-tight manner and is filled with a metal vapour and a rare gas, this lamp vessel being provided with a tubular protuberance, which accommodates a rod-shaped core of magnetic material surrounded by a wire winding connected to a high-frequency supply unit, by means of which during operation of the lamp an electrical discharge is maintained in the lamp vessel, the inner side of the lamp vessel being provided with a transparent conductive layer which is electrically connected by means of a lead-through member to a conductor located outside the lamp vessel, characterized in that the lead-through member is located in the wall at the end of the tubular protuberance, the lead-through member being electrically connected to the internal conductive layer.
Dependencies are inferred from the claim text.