North American Philips Corporation

Kathleen P Bernard

John P Dunn

John C Alderman

Kris Aelterman

Kent L Collins

Norman R King

Jagannathan Ravi

Jay J Palmer

Kenneth E Pearson

Dale E Brabham

Ronald C Marburger

Herbert Bayne

Edward A Putnam

Louis B Dubowicz

A high pressure discharge lamp includes a pair of arc tubes connected electrically in parallel within an outer envelope, which includes a lamp stem having a pair of stem conductors entering the lamp envelope in a common plane. The arc tubes include conductive feed-throughs at each end thereof. A lamp frame supports the arc tubes in a plane parallel with the stem conductors and is welded directly to each of the feed-throughs with all welds in a common plane with the welds between the frame and the stem conductors. The frame includes a resiliently deformable transverse member which allows for independent changes in length of the arc tubes during lamp operation due to thermal expansion/contraction. The frame is free of slip fit connections with the feed-throughs and free of additional conductive straps connected to the feed-throughs.

Dual arc tube discharge lamp having a lamp frame with coplanar spot

A 1000 watt arc discharge arc tube assembly comprises two series connected side-by-side arc discharge tubes whose combined break down voltage in sufficient for a standard 2-5 kv starting pulse to simultaneously start both arc tubes without additional structure. A standard ballast, starter and fixture can be used with the arc tube assembly whose overall length is less than 300 millimeters. The lamps are spaced sufficiently apart to preclude detrimental heat transfer effects on one another and sufficiently close to act as a single source of light in standard fixtures normally employing lamps having a single discharge tube.

High-pressure series arc discharge lamp construction

A discontinuous annular metallic holder for a glow starter in a high pressure discharge lamp. The holder has a hexagonal shape and encircles the bulb of the glow starter. One side is welded to one of the current-supply conductors extending from the lamp stem and two of the sides are parallel to the plane of the getters. The lower parallel side closest to the getter plane has an opening extending the length of the side to define an electrical discontinuity and to prevent a continuous circuit path within the lower side. The gap reduces the current induced in the lower side and resultant heating when the holder is subjected to an electromagnetic field during flashing of the getters. The reduced temperature of the lower side prevents damage to the glow starter.

Glow starter holder with protection against R.F. overheating

A dual arc tube high pressure discharge lamp with a support frame connected to an electrical connector comprising a U-shaped piece of wire the axes of the legs of which are offset from the base so that the plane passing through the axes of the legs does not pass through the middle of the base of the wire.

Arrangement for supporting two discharge tubes in one envelope

A dual arc tube high pressure discharge lamp with a locating element for one end of each discharge tube in which the locating element comprises an H-shaped piece of stamped metal with a leg of the H inserted in the tubular electrode assemblies of each of the dual arc tubes.

Sheet metal support for dual arc discharge lamps and method of making

Growing community of inventors

Painted Post, NY, United States of America

Kathleen P Bernard