Abstract: An electric lamp is provided with an end having an annular recess which contains an insulating member which is secured to the lamp by means of at least two conductors which each extend from the lamp through an aperture in the insulating member. The insulating member and the annular recess are so shaped that the insulating member is held against rotation and lateral displacement with respect to the lamp. The insulating member has cut-out portions remote from its ends, preferably in a central portion, and most preferably configured to have two substantially octagonal portions connected by a portion in the shape of a rectangle, through which cut-out portions underlying material of the annular recess is exposed.

Abstract: An electric lamp includes a hybrid skirted lamp base including a plastic skirt portion and a metallic skirt portion having one end portion molded in said plastic skirt portion and a second end portion secured to the lamp envelope. The metallic skirt portion improves structural integrity and provides some thermal isolation from the lamp envelope allowing the use of a lower temperature plastic for the plastic skirt portion. The plastic skirt portion includes a weldless and solderless lamp base. A lamp cap contact includes a rigid shank received in a clamping bore of the plastic skirt portion. The diameters of the bore and shank and the elasticity of the bore wall are selected so that a conductive lead of the lamp is securely clamped between the shank and the bore wall when the shank is fully received in the bore. In a favorable embodiment, the lead has a free end extending in the direction of insertion of the shank into the bore, which avoids the lead wire from being pushed out of the bore.

Abstract: A rotating-telescoping base structure for lamps or light bulbs is described. The structure may be rotated up to 320.degree. and may be telescoped outwardly from the base structure. This enables use in applications where a longer neck dimension is needed or alignment of the fixture without unscrewing it from a socket is to be carried out.

Abstract: A fluorescent lamp unit adapted for use in an incandescent lamp socket includes a tube, a cap member having a base wall in which the tube is fixed, and a ballast housing having a primary cavity which is substantially defined by a circumferential wall and closed toward the cap member to create a secondary cavity which thermally isolates the tube from the ballast. The housing further includes a partition which isolates conduits for the wire leads from the primary cavity and each other, whereby uninsulated leads may be used. A potted ballast completely fills the primary cavity to improve heat dissipation through the circumferential wall.