H - Electricity – 01 – J
Patent
H - Electricity
01
J
H01J 61/30 (2006.01) H01J 61/32 (2006.01)
Patent
CA 2531085
The subject matter of the disclosure is a bulb (2) for a discharge lamp, which comprises an inner burner chamber (3), the outer contour of the bulb and the burner chamber each having a central region (2a, 3a) and adjacent edge regions (2b, 3b), each central region being toroidal, and it being possible for each edge region of the burner chamber to be in the form of a truncated cone away from the central region (3a) and rotationally symmetrically with respect to the bulb axis, at a specific angle of taper (a). According to the invention, the midpoints of the circle segments, which form the central region of the outer contour and of the burner chamber, have a distance (z) in the direction of the bulb axis; and/or the angles of taper of the two edge regions of the burner chamber are not the same; and/or the bulb axis lies between the circle segment, which forms the central region of the outer contour and/or of the burner chamber, and its midpoint.
Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh
Smart & Biggar
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