Electric lamp and discharge devices – With gas or vapor – Having electrode lead-in or electrode support sealed to...
Patent
1996-05-17
1998-03-17
Patel, Ashok
Electric lamp and discharge devices
With gas or vapor
Having electrode lead-in or electrode support sealed to...
313631, 313326, 313574, H01J 6136
Patent
active
057290890
ABSTRACT:
Variable backspace in electrode assemblies for high pressure sodium lamps is achieved by employing a hollow electrode base which has one end formed to frictionally engage an electrode, which electrode includes a solid core having a coil about one end thereof. The solid core is inserted into the electrode base a given distance and is maintained in this position by friction until welding is accomplished. The electrode base is provided with a positioning ring which is formed at the time the base is first formed. The electrode assemblies can be utilized with lamps having different arc lengths while using arc tubes having the same size.
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Dolan Robert B.
Ingalls Paul H.
Zhu Huiling
McNeill William H.
Osram Sylvania Inc.
Patel Ashok
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