High-pressure discharge lamp
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United States of America Patent
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-
Feb 21, 1989
Grant Date -
N/A
app pub date -
Oct 16, 1987
filing date -
Oct 20, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The high-pressure discharge lamp has a discharge vessel (1) with neck portions (7) of reduced width. The electrode pins (9) have at their free ends an electrode head (10), whose largest diameter is larger than the diameter of the electrode pins (9). Due to the fact that the electrode head (10) must be able to pass through a duct in the neck portion (7) of reduced width when the lamp is assembled, the electrode (2) has lateral play, which may lead to a non-centered position of the electrode (2) in the discharge vessel (1). In the lamp according to the invention, this disadvantage is mitigated in that the electrode pin (9) in the neck portion (7) of reduced width has a transverse dimension which is larger than the diameter of the pin (9), for example due to the presence of a flattened part (11).
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