Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1993-03-02
1995-02-07
Yusko, Donald J.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
313493, 313514, 313515, 313573, 313634, 313643, 313545, 313546, 445 70, 445 73, 445 26, 445 38, 445 53, H01J 1972, H01J 6124, H01J 6130
Patent
active
053878370
ABSTRACT:
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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Ligthart Franciscus A. S.
Nederpel Paulus Q. J.
Roelevink Bauke J.
Botjer William L.
Esserman Matthew J.
U.S. Philips Corporation
Yusko Donald J.
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