Electric lamp and discharge devices – With gas or vapor – Having electrode lead-in or electrode support sealed to...
Patent
1986-03-31
1990-06-26
O'Shea, Sandra
Electric lamp and discharge devices
With gas or vapor
Having electrode lead-in or electrode support sealed to...
H01J 6122
Patent
active
049374940
ABSTRACT:
A high pressure discharge lamp has a discharge vessel with a closure and an electrode lead-through with an electrode rod mounted thereon. The closure has an aperture therethrough with a predetermined diameter. The lead-through comprises an elongated cylindrical member dimensioned to fit closely within the aperture through the closure, and a limiting means for limiting the distance the lead-through extends in the discharge envelope. The lead-through is crimped at a predetermined location on its outer surface, forming the limiting means including a plurality of alternating contractions and expansions. The expansions form protuberances having a diameter greater than the predetermined inner diameter of the aperture. The protuberances limit the extent of insertion of the lead-through into the discharge envelope, align the lead-through on the closure with a centerline attitude, and determine the distance the electrode rod is inserted within the discharge vessel.
REFERENCES:
patent: 4065691 (1977-12-01), McVey
patent: 4075530 (1978-02-01), Furukubo et al.
North American Philips Corporation
O'shea Sandra
Wieghaus Brian J.
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