Gte Products Corporation

Gte Sylvania Incorporated

Robert S White

John A Scholz

Philip J White

William M Keeffe

Harold L Rothwell, Jr

Elliot F Wyner

James C Morris

William G Thiry

William Mcjames

An electric lamp includes an arc tube assembly mounted in a lamp envelope including a reflector, a lens and a base for connection to an electrical source. The arc tube assembly includes an arc tube having a longitudinal axis aligned with the optical axis of the reflector, a light-transmissive shroud disposed around the arc tube, first and second clips attached to opposite ends of the arc tube, a connection member attached to the first and second clips such that the shroud is retained between the first and second clips in a fixed position relative to the arc tube, and upper and lower electrode supports for mechanically supporting the arc tube in the lamp envelope entirely from the base region and for coupling electrical energy to the arc tube. A support ring is positioned in a heel region of the lamp envelope and is attached to the connection member. The support ring cushions the arc tube assembly when the lamp is subjected to mechanical shock. The connection member includes a connection rod having a first section located outside the shroud between the first and second clips and a second section extending between the first section and the support ring.

Reflector lamp assembly including metal halide arc tube

An arc tube fabricating process wherein an oxygen-absorbing getter is affixed to at least one of a pair of electrodes, one of the electrodes is sealed into the end of a tubular ceramic envelope, a dosage is deposited in the tubular ceramic envelope and the other one of the pair of electrodes is sealed into the other end of the tubular ceramic envelope.

Unsaturated vapor high pressure sodium lamp arc tube fabrication process

A low wattage metal halide discharge lamp includes an evacuated envelope wherein is disposed a heat loss reducing member having an arc tube therein and means for interrupting the circuit for the current flow which sustains the electrolytic sodium loss process. In one embodiment, the circuit interruption means includes supporting the arc tube and dome sleeve by a supporting rod that is affixed by a metal strap to the glass stem within the lamp. The primary circuit interrupting effect occurring upon the heat loss reducing member being supported about the arc tube in an electrically insulated manner so as to create a high path of resistance back to the power supply. A substantial reduction of sodium loss along with improved color constancy and voltage stability resulted from interruption of the electrolysis circuit.

Low wattage metal halide discharge lamp

An electric lamp includes a lamp assembly mounted in a lamp envelope including a reflector, a lens and a base for connection to an electrical source. The lamp assembly includes an arc tube having a longitudinal axis aligned with the optical axis of the reflector, an arc tube support strap attached to one end of the arc tube and including legs extending laterally in opposite directions from the axis of the arc tube, bulb spacers coupled to the legs of the support strap for positioning the arc tube relative to the lamp envelope, a light-transmissive shroud around the arc tube, and electrode supports coupled to the upper and lower electrode leads of the arc tube. The shroud includes an open end which abuts against the legs of the support strap and a domed end which substantially encloses one end of the arc tube. The electrode supports are electrically isolated from the support strap, the bulb spacers and the reflector. The shroud is secured between the support strap and one of the electrode supports. The domed end of the shroud is preferably located at the lens end of the arc tube, but can also be located at the base end of the arc tube.

Metal halide lamp assembly

An unsaturated vapor type high pressure sodium lamp includes an arc tube having a tubular ceramic envelope containing a dosing of sodium, mercury and a rare gas with an electrode sealed into each end of the envelope and an oxygen-absorbing getter telescoped over or affixed to the electrode.

Unsaturated vapor high pressure sodium lamp getter mounting

A single-ended lamp having a double-ended light-source capsule mounted axially within an outer envelope on thermally conductive support members such that the amount of heat conducted to the base region of the lamp through each support member is approximately equal. In a preferred embodiment, a high-pressure sodium PAR lamp having a temperature-sensitive component in the lamp base employs two support wires for the arc tube; the support wire coupled with the arc tube end closer to the lamp base has a loop formed therein so that the lengths of both support wires are approximately equal and the thermal conductivity of both support wires are also approximately equal in the operating environment of the lamp; whereby the temperature-sensitive component operates within acceptable temperature limits. In alternate embodiments, each support member may employ one or more loops or other configurations in order to minimize the amount of heat transferred to the lamp base through conduction in the support members. The invention has particular application in lamps having temperature-sensitive components or materials in the base region of the lamp, or where the temperature of the lamp socket or its surroundings is particularly constrained.

Lamp with light-source capsule support members having equal thermal

A light-source containment device and lamp employing such device; a metal halide arc discharge lamp having a light-transmissive shield enclosing the arc tube and a wire mesh surrounding the shield. In the event the arc tube bursts causing shattering of the shield, the wire mesh substantially restricts shards of the shield and arc tube from shattering the outer envelope of the lamp thereby providing improved safety characteristics of the lamp. A similar containment device encloses the light-source capsule and protects against lamp-containment failures in tungsten halogen lamps.

Light-source capsule containment device and lamp employing such device

A high intensity discharge lamp includes, within the outer envelope, a strip of niobium foil serially connected between a power source and one of the electrodes of the arc tube of the lamp. The foil is not a power consuming element but will oxidize and open the circuit, thus extinguishing the lamp, in the event the outer envelope is ruptured.

High intensity discharge lamp including arc extinguishing means

In the process of inserting and fastening a thin molybdenum ribbon into the slot of a slotted tungsten rod, for use in the press seal of a high silica glass lamp envelope, a two step welding process is used. The first weld is made with the two welding electrodes at the internal end of the slot. The second weld is made with the electrodes closer to the end of the rod.

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Beverly, MA, United States of America

Robert S White