Abstract: A small volume, high wattage press sealed lamp having envelope, filament, internal leads, seal foils, external leads, and blades is disclosed. The small volume, high wattage press sealed lamp increased conductivity due to a flat faced external lead forming one of the foil welds. The external lead is butt welded to blade stock at ninety degrees forming a highly conductive bond.

Abstract: A double envelope electric lamp having an outer envelope, support frame, inner capsule, threaded base, center contact, is disclosed. The support frame is formed with hooked ends that lie in shall grooves formed through the threads formed on the lamp neck. The exterior arms abut the metal base when the metal base is threaded onto the outer envelope. By making the exterior arms with a heavy wire, the positioning accuracy may be increased, and surprisingly, the threading torque may be reduced.

Abstract: An oxygen detector for use in a double envelope lamp is described. The detector may be formed by nitriding a metal surface to produce a metal piece with a first visual color or state. The surface thickness is sufficient to exclude oxygen during normal assemble, but thin enough to change colors during lamp operation if oxygen is present.

Abstract: A improved projector lamp with an internal reflector may be made by forming the reflector from pure aluminum, or an aluminum alloy not including amounts of vaporizable materials. Anodized aluminum is not used. A pure aluminum reflector is mechanically polished and chemically etched to attain a high level of reflectivity. The quality of the surface finish is retained by enclosing the reflector in an oxygen free lamp. The high purity aluminum acts as a getter for oxygen, and other detrimental contaminants, thereby tending to extend the lamp life and maintain lamp output. Since aluminum is lighter weight than the previous reflector materials, the lamps do not suffer as much breakage during manufacture and shipping.

Abstract: An improved projector lamp with an internal reflector may be made by forming the reflector from pure aluminum, or an aluminum alloy not including amounts of vaporizable materials. Anodized aluminum is not used. A pure aluminum reflector is mechanically polished and chemically etched to attain a high level of reflectivity. The quality of the surface finish is retained by enclosing the reflector in an oxygen free lamp. The high purity aluminum acts as a getter for oxygen, and other detrimental contaminants, thereby tending to extend the lamp life and maintain lamp output. Since aluminum is lighter weight than the previous reflector materials, the lamps do not suffer as much breakage during manufacture and shipping.

Abstract: A multi-planar, one-piece wire insert for supporting a coil filament body in an electric incadescent lamp in which the wire insert includes a top leg disposed in a plane out of the main plane of the insert so as to permit the coil filament body, as wound, to fit (match) the insert directly without requiring alteration to the ends of the coil filament body and/or changing of the wound coil geometry.

Abstract: 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.

Abstract: An electric lamp including a glass envelope having at least one conductive foil hermetically sealed within the press-sealed end portion thereof, the foil being electrically connected at one end to a side rod support wire which projects within the envelope's bulb portion to form part of the lamp's filament structure. A sound electrical connection between the support wire and conductive foil is attained by providing the end portion of the support wire with a relatively flat configuration and knurling a surface of this flattened end. This knurled surface, being welded to the foil, provides such a connection without the use of flux or the like. A method of making this lamp is also disclosed.

Abstract: An electric lamp (e.g., tungsten-halogen) wherein a glass bridge (31) is used and has the support wires (23) of the lamp's filament structure (13) passing therethrough. The support wires are indented (e.g., with V-shaped notches) on opposing sides thereof just below the bridge to permit movement of the portions of the support wires between the bridge and press-sealed end (17) of the lamp's envelope (11) during press-sealing, thereby substantially relieving stresses on the bridge (31) and possible breakage thereof as may occur if such wires were retained in a fixed, non-movable arrangement.

Abstract: A high temperature tungsten halogen lamp having improved lamp strength so as to reduce lamp breakage. The ceramic base for supporting the press sealed end of the lamp's envelope has a top thereof including a pair of upwardly projecting members that extend above the press sealed portion to contact the bulb portion of the lamp envelope (or capsule). These corner projecting members enable enhanced support while at the same time providing a pair of windows therebetween to enable sufficient heat dissipation (thus preventing excessively high lamp seal temperatures). In accordance with the method of the invention the envelope is cemented to the ceramic base in a two-step operation including firstly cementing the base below the projecting members to bind the base to the envelope's press sealed portion and thereafter cementing the projecting members to the envelope's bulb portion.

Abstract: An improved projection lamp unit including a glass reflector having a concave reflecting surface and a tungsten halogen lamp positioned within the concavity of the reflector. The concave reflecting surface of the reflector is provided with alternately disposed radially extending regions including a series of specular stripes in combination with alternately spaced regions of facets. Preferably four or five stripes and an associated four or five facet regions are provided.

Abstract: A spot lamp having a lens in the form of a curved member having an inner surface with a series of radially disposed flutes formed therein defining a fluted portion which surrounds a centrally disposed stippled portion. The flutes each extend linearly from a position adjacent the stippled portion outwardly to a position adjacent the outer edge of the curved member. The surfaces of the flutes are also stippled.

Abstract: A flood lamp having a lens with a series of concentrically disposed fluted rings on the internal lens surface in combination with an outer concentric ring adjacent to and wider than any one of the fluted rings and containing a plurality of semi-spherical protrusions disposed in an established pattern (e.g., circular or hexagonal). The flood lamp reflector has multiple reflective surfaces including a front section that is parabolic shape having a principle focal point, a spherical section having its center of radius coincident with the principle focal point of the parabolic front section, and a spherical rear section.

Abstract: A spot lamp having a lens with a series of concentrically disposed fluted rings on the internal lens surface in combination with an outer concentric ring adjacent to and wider than any one of the fluted rings and having a stippled surface. The spot lamp reflector has multiple reflective surfaces including a front section that is parabolic shape having a principle focal point, a spherical section having its center of radius coincident with the principle focal point of the parabolic front section, and a spherical rear section.