General Electric Company

Albert L Suster

Raymond A Heindl

Gilbert H Reiling

Rolf S Bergman

Gene I Thomasson

Winston T Bachmann

Clifford W Paugh

William H Sullivan

Edward M Beesley

John Gritti

Sockets for receiving metal lamp bases of electric lamps which contain metal parts fabricated from certain relatively high copper and low zinc content copper alloys are resistant to corrosion and to corrosion cracking in corrosive environments.

Corrosion resistant sockets for electric lamps

Metal lamp bases for electric lamps fabricated from certain relatively high copper and low zinc content copper alloys and lamps employing same are resistant to cracking in corrosive environments.

Corrosion resistant base for electric lamps

A rapid restrike metal halide lamp and method of operating such a lamp are disclosed which are particularly suitable for sports stadium lighting applications. The rapid restrike metal halide lamp has an arc tube containing constituents which require a waveform having a relatively high voltage and at a relatively high current in order to rapidly restrike the arc tube after the lamp has experienced a power interruption so as to initiate a sustaining arc condition of the arc tube. The relatively high waveform in the form of a series of pulse trains is routed to the arc tube by means of a two path arrangement comprising a conductive base at the bottom of the lamp and a insulative cap at the top of the lamp. This two-way path substantially reduces and even eliminates any arcing condition within the confines of the lamp. The rapid restrike metal halide lamp may have a keep-alive heater arranged around at least a portion of the arc tube so as to assist in the rapid restriking of the lamp after the lamp has experienced an extended shut-down or cool-down condition. The disclosed method specifies particular ranges for an ignition voltage which obtain the rapid restrike of the arc tube.

Rapid restrike metal halide lamp and a method of operating such

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Chagrin Falls, OH, United States of America

Albert L Suster