U.S. Philips Corporation

Leonardus G Michiels

Petrus F Van Den Boom

Petrus H Antonis

A light-transmissive discharge vessel (1) encloses a discharge space (10) which contains an ionizable filling comprising an evaporable component. The low-pressure discharge lamp is also provided with coil for maintaining an electric discharge in the discharge space, and with a carrier (3) with a resilient body (30) and an open holder (31). The resilient body (30) is clamped inside a tube (14) which communicates with the discharge space (10). The holder (31) is clamped inside the resilient body (30). In the absence of the holder (31), the resilient body (30) can be inserted in a released state in the tube (14) with play (x).

Low-pressure discharge lamp and method of manufacturing a low-pressure

A lighting unit comprises an electrodeless low-pressure discharge lamp (10) and an electric supply (60) for the lamp. The lamp is provided with a discharge vessel (20) having a radiation-transmitting enveloping portion (21) and a recessed portion (24). The discharge vessel encloses a discharge space (27) in a gastight manner and contains an ionizable filling. The lamp also is provided with a coil (30) positioned in the recessed portion for generating a high-frequency magnetic field so as to maintain an electric discharge in the discharge space. The enveloping portion (21) of the discharge vessel is provided with a radiation-transmitting, electrically conducting layer (22) at a surface facing the discharge space (27). This layer is electrically connected to a lead-through member (42) which issues to the exterior of the discharge vessel. The lead-through member is a metal tube which forms at least a portion of a tubular projection (46, 42, 47). The discharge vessel of the lighting unit can be manufactured comparatively easily and can have a comparatively compact construction.

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Eindhoven, Netherlands

Leonardus G Michiels