(19)
(11) EP 0 505 947 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
09.03.1994 Bulletin 1994/10

(43) Date of publication A2:
30.09.1992 Bulletin 1992/40

(21) Application number: 92104916.9

(22) Date of filing: 20.03.1992
(51) International Patent Classification (IPC)5: H05B 41/16, H01F 38/10, H01J 61/54, H01J 31/06, H01J 5/02, H01J 31/00
(84) Designated Contracting States:
CH DE ES FR GB IT LI SE

(30) Priority: 29.03.1991 JP 66492/91
06.12.1991 JP 100834/91 U

(71) Applicant: KABUSHIKI KAISHA SANYO DENKI SEISAKUSHO
Gifu-shi Gifu (JP)

(72) Inventors:
  • Amano, Shintetsu
    Gifu-shi, Gifu (JP)
  • Hori, Isao
    Gifu-shi, Gifu (JP)
  • Ichimiya, Fumio
    Gifu-shi, Gifu (JP)
  • Matsui, Toshihiro
    Gifu-shi, Gifu (JP)

(74) Representative: Hoffmann, Eckart, Dipl.-Ing. 
Patentanwalt, Bahnhofstrasse 103
82166 Gräfelfing
82166 Gräfelfing (DE)


(56) References cited: : 
   
       


    (54) Transformer for gas discharge lamps


    (57) A low-voltage winding and a high-voltage winding (16) are wound on a main iron core (11). Between these low-voltage and high-voltage windings (16), a leakage iron core is interpositioned. A minimum of 5 flanges (22) is formed integratedly on a bobbin (15) of the high-voltage winding (16), in equal intervals. Between these flanges (22), the high-voltage winding (16) is wound in split sections. Thus, the number of connectable back border tubes can be increased by one or more from that with a conventional transformer of a non-split type winding.






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