U.S. Philips Corporation

Paulus Q Nederpel

Bauke J Roelevink

Franciscus A Ligthart

Antonius J Van Hees

The signaling system contains a low-pressure rare gas discharge lamp having a tubular lamp vessel provided with electrodes. The lamp is accommodated in a housing having a light-emission window and light-reflecting means. The housing has a light-reflecting inner surface reflect light and an elongate converging lens, closing the light-emission window. The housing may have a niche in which the lamp is partially recessed countersunk and in which the lamp may be secured by an adhesive.

Low pressure rare gas discharge lamp signalling system

A low pressure discharge lamp having a tubular discharge vessel (1). At each of its end portions (2, 3) the vessel (1) is fused to a respective metal tube (5) having an uncovered outer surface outside the vessel. A sealed glass tube (6) is fused to the metal tubes (5). Ignition aids (18, 28, 40) may also be present. The simple construction of the lamp permits manufacture and high lamp quality, even at long lengths and/or small diameters of the discharge vessel. The lamp may have an ionizable filling of rare gas or may also contain mercury. A fluorescent powder may also be present in the discharge vessel. The lamp (72) and a luminaire (70, 71) mounting the lamp may be used for display or signalling purposes.

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Eindhoven, Netherlands

Paulus Q Nederpel