Abstract: The electric lamp has ceramic lamp caps (7, 8) secured to the lamp vessel (1) without the use of cement. This is realized by securing the cable (9) to the current supply conductor (5) after the lamp cap (7) has been provided. Securing is made possible by the shape of the lamp cap (7) which has a cavity (13) for the seal (2) of conductor (5), which duct runs into a recess (14) for the cable (9). A bore (15) enables the cable (9) to be connected to the current supply conductor (5) after the lamp cap (7) has been provided.

Abstract: The electric cooker unit having a housing with a base wall and upright side walls provided with openings. A thermal isolator may be arranged along the walls. The unit further has an electric IR lamp having a lamp vessel provided with pinch seals. The openings are slots merging into the edge of the side walls. A pinched seal has a profile on the major faces, which limit a displacement of the lamp in the housing.

Abstract: An electric cooking unit having a housing having a base wall and side walls provided with apertures. The unit further has an IR lamp with a tubular glass lamp vessel, which is sealed in a vacuum-tight manner and in which a tungsten filament is arranged, whose turns directly engage the wall of the lamp vessel. During operation, the filament has a temperature lying between approximately 1200.degree. C. and approximately 1500.degree. C.

Abstract: An electric lamp having a glass lamp vessel 1 with a seal 7 coated with an intermediate coating layer of zirconium oxide 8. Lamp vessel 1 is connected at its seal 7 by a sealing cement 9 to a lamp cap 2. Zirconium oxide coating 8 completely separates seal 7 from sealing cement 9 and reduces mutual adherence therebetween. During operation of the lamp, zirconium oxide coating 8 reduces the thermal load and prevents cracking of seal 7 of lamp vessel 1.

Abstract: The electric lamp according to the invention has a mainly tubular glass lamp vessel (1) coated with an interference filter (5) of alternating layers of SiO.sub.2 and of a material having a comparatively high refractive index. The lamp vessel 1 has portions at the area of and near its seals (6,7) having a form deviating from the tubular form and is in situ free from the material having a high refractive index of the interference filter (5). As a result, the lamp vessel (1) has a comparatively high resistance to pressure.

Abstract: A lamp having a ceramic molding between a cap and a lamp envelope, the current supply conductors passing through the molding between the cap and the envelope. The conductors pass through separate ducts in the molding, one of the conductors includes a fuse accommodated entirely within the duct, and that duct is sealed at an end adjacent the lamp cap by a coherent mass of material such as a base cement. Flashover from a fuse arc to either the other conductor or the lamp cap is prevented.

Abstract: A particularly stable arrangement of a lamp envelope in a lamp cap is achieved by means of a metal cup which with its base faces the base of the lamp cap and is connected in the lamp cap so that its free edge engages the lamp envelope. The metal cup has an aperture in its base along the edge of which the cup has oppositely located lugs facing the base of the lamp cap and bearing against a pinch of the lamp envelope.

Abstract: In an electric incandescent lamp having a tungsten filament with a number of light-emissive sections (5, 7) connected by a non-light-emissive conductor, complicated constructions are often used so that said non-light-emissive conductor dissipates little energy.In such an incandescent lamp according to the invention the non-light-emissive conductor consists of a piece (9) of the tungsten wire (1) from which the light-emissive sections (5, 7) have been wound helically and around which a wire (2) of a less noble metal than tungsten is wound.The lamp may be used as a copying lamp. FIG. 1e.

Abstract: A two-pinch line voltage halogen incandescent lamps according to the invention has metal foils in the pinches which foils are connected to respective internal current conductors and external conductors. The metal foils extend from the pinches into the cavity formed by the lamp envelope. The internal current conductors have a maximum diameter of 300 .mu.m and are welded to the metal foils in a place situated in the cavity formed by the lamp envelope, in a place situated in the pinch, or both in the cavity and in the pinch. The construction prevents explosion of the lamp as a result of cracking of the pinches caused by a discharge arc.

Abstract: In a lamp/reflector unit according to the invention the pinch seal (6) of an electric lamp (4) is enclosed laterally between moulded members (10, 11) and accommodated with said moulded members (10, 11) in the necked portion (2) of a reflector body (1). The surface of the pinch seal (6) has a groove (12) which is in engagement with rib (13) on one of the moulded members (10) and keeps the lamp (4) locked against axial movement. The necked portion (2) of the reflector body (1) keeps the lamp (4) with the moulded members (10, 11) fixed.

Abstract: Mains voltage halogen incandescent lamps according to the invention have at least one metal foil (25) incorporated in the pinch seal (22) of the lamp envelope (21) which extends into the cavity (23) enclosed by the lamp envelope (1) and is connected to an internal current conductor (29) situated entirely within said cavity (23). The lamps furthermore have a non-current-carrying supporting member (31) for said internal current conductor (29) which is embedded in the pinch seal (22) at a distance from the metal foil (25).

Abstract: Two-pinch mains voltage halogen incandescent lamp according to the invention have metal foils (6) in the pinches (5) which foils are connected to respective internal current conductors (8) and respective external current conductors (10). The metal foils (6) extend beyond the pinches (5) into the cavity (7) formed by the lamp envelope (1). The internal current conductors (8) do not penetrate into the pinches (5). The construction prevents explosion of the lamps as a result of cracking of either pinch caused by a discharge arc.

Abstract: The prior art voltage halogen incandescent lamps destined for use as photolamps have a high operating gas pressure (to reduce filament evaporation) and, hence, present an explosion hazard lamps of the type according to the invention have a gas filling which during operation has a relatively low pressure between 0.8 and 1 bar; eliminating the hazard and thereby enabling them to be housed in considerably smaller and lighter luminaires.

Abstract: A capless electric incandescent lamp comprises a lamp envelope having a flat pinch. A first wide side face of this flat pinch has current supply wires bent backwards along the extent thereof. A second wide side face of this pinch has means to suitably cooperate with a fixing member in a lampholder.