Gte Products Corporation

David A Cox

Jeffrey Paul Buschmann

Arnold E Westlund, Jr

Stephen P Senft

A hooked arc discharge lamp electrode may be formed with electrodes slanting towards each other and towards the electrode roots. The hooking back of the electrode tips forms a gap between the electrode tip and the electrode shaft that prevents the arc from wandering across. The arc is then confined to a small area from the electrode tip area on the side away from the gap. The arc is prevented from wandering down the electrode shafts away from the optically ideal location, and to a potentially destructive position adjacent the envelope wall.

Hooked electrode for arc lamp

A double jacket arc lamp is disclosed. A double jacket arc lamp may be formed with an electric lamp capsule having an inner light transmissive envelope with electrical leads extending from the inner envelope through a first seal, and a second light transmissive envelope sealed to the inner envelope at a second seal to substantially surround the electric lamp capsule and form an enclosed volume between a portion of the exterior of the inner envelope and the interior of the outer envelope, and leaving the leads unenclosed by the outer envelope. The lamp leads then pass through only one seal, and have no portions exposed in the intermediate insulating volume. The intermediate volume of the double jacket arc lamp may include a fill gas including a noninert component. In particular, the fill gas may include oxygen which is thought to have useful gettering and glass preservation attributes. The use of oxygen in the fill gas allows the lamp to operate at a higher temperature, and therefore more efficiently.

Oxygen protected electric lamp

An arc discharge lamp resistant to surface path arcing may be formed by press sealing a dielectric barrier between the electrode roots. By properly manipulating the press seal, a barrier of the dielectric envelope material may be positioned between the electrode roots. The barrier lengthens the discharge path between the electrode roots, and thereby resists surface arc discharge. The lamp seal is then protected from surface discharge heating, and light generation properly occurs between the electrode tips.

Arc lamp with surface arc resistant barrier

A ceramic base for a tungsten halogen lamp has a bottom wall for supporting contact pins connected to respective lead-in wires sealed in the press-sealed end of the lamp. The base furthermore has a side wall integral with the bottom wall and at least one hole therein for receiving the press-sealed end of the envelope. The ceramic base side wall has convective vent passages including at least a first vent passage for inlet of cool air to the air space about the press-sealed end of the lamp, and at least a second vent passage for outlet of warmed air therefrom to thereby provide convective air cooling of the envelope press-sealed end.

Convectively cooled ceramic lamp base

An electric incandescent lamp (e.g., tungsten-halogen) including a light-transmitting envelope having an internal curvilinear wall, a gas mixture within the envelope, at least two support rods extending within the envelope in a spaced-apart manner, at least one bridge member within the envelope and supported substantially between the two support rods, and an electrically conductive filament structure located within the envelope and suspended from the bridge member. At least one support member, secured to the bridge member and projecting therefrom and including a U-shaped end portion for engaging the curvilinear internal wall of the envelope, is utilized to provide both compressive and axial support for the bridge member and suspended filament structure. The support member is preferably a wireform comprised of molybdenum.

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Lexington, KY, United States of America

David A Cox