Abstract: Axial-geometry incandescent lamps with accurately aligned, self-centering helical filaments are disclosed, the filaments having heavy end sections which are mechanically deformed to grip a helical center section. Tubular lamp envelopes have a glass center section and metal end sections heat-sealed thereto. Envelopes are produced in quantity by a machine having magazines loaded with envelope components, the components being automatically assembled and united by heat sealing. Envelopes of larger size may employ glass-beaded metal end sections formed before the end sections are assembled with the center section. Rotation of the envelope components during heat sealing ensures seal uniformity and concentricity.

Abstract: Axial-geometry incandescent lamps with accurately aligned, self-centering helical filaments are disclosed, the filaments having heavy end sections which are mechanically deformed to grip a helical center section. Tubular lamp envelopes have a glass center section and metal end sections heat-sealed thereto. Envelopes are produced in quantity by a machine having magazines loaded with envelope components, the components being automatically assembled and united by heat sealing. Envelopes of larger size may employ glass-beaded metal end sections formed before the end sections are assembled with the center section. Rotation of the envelope components during heat sealing ensures seal uniformity and concentricity.

Abstract: Apparatus for manufacturing lamp envelopes for axial-geometry incandescent lamps comprises a plurality of magazines for receiving stacks of lamp envelope components and a transport moveable with respect to the magazines and having component-receiving platforms alignable with ends of the magazines. The platforms are supported on rotatable hubs and the hubs have axial bores through which components are pushed onto the platforms by pusher means. The hubs are supported at one end of a transport arm, the other end of the arm being supported for pivotal movement about an axis parallel to the axis of rotation of the hubs so that the transport arm may be moved relative to the magazines. An arrangement of holding magnets and spring-biased slotted plates associated with the platforms controls the holding and release of components.