General Electric Company

József Tökés

László Bánkuti

János Orbán

Lajos Reich

Gábor Schmidt

József Fülöp

István Maros

István Würsching

Sándor Lukács

István Kerényi

József Csapó

A bulb-shaped outer envelope for accommodating at least one lamp including a light-emitting body and a control gear is disclosed. The envelope has a substantially spherical section for receiving the light-emitting body, and an elongated end section for receiving at least a part of the control gear components. The elongated end section is provided with a neck section. A substantially tubular neck-extension portion connects to an inner surface portion of and protruding from the neck section. The neck-extension portion is suitable for accommodating a remaining part of the control gear components. In a method for the manufacture of a glass outer envelope, a flare that is normally used in the manufacture of incandescent lamps is turned around by 180&#xb0;, put into a skirted bulbous envelope, melted into the envelope while the skirt is detached and the flare is formed into a neck-extension portion. A self-ballasted compact fluorescent lamp with the bulb-shaped outer envelope is also disclosed. A part of the ballast components are disposed in the neck-extension portion of the outer envelope.

Bulb-shaped outer envelope for lamps, method for manufacture thereof, and compact fluorescent lamp therewith

Energy saving lamp

A low pressure discharge lamp with a double helix shape comprises a lamp base and an envelope connected to the lamp base. The envelope has a phosphor coating on an interior surface thereof, and contains a gas fill energizable to a discharge state by electrical voltage. The envelope includes discharge tube sections which are wound about a longitudinal axis and fitted into each other as a double-start thread. The discharge tube sections have first end portions and second end portions. The first end portions are closer to the lamp base and each have a gas-tight sealing and electrodes in the sealing for receiving the electric voltage. The second end portions are farther off the lamp base and each have a gas-tight sealing. These second end portions are bent inwards from a pitch of the helix and extend next to each other spaced apart by a clearance. A passage is formed between said second end portions. The passage is spaced apart by a distance from the sealing of each said second end portion.

Low pressure discharge lamp with envelope having double helix shape and sealed ends

A dielectric barrier discharge lamp is disclosed, which has a discharge vessel enclosing with a wall a discharge volume filled with discharge gas. There is a phosphor layer within the discharge volume. The discharge lamp comprises first and second sets of interconnected electrodes, which are isolated from the discharge volume by at least one dielectric layer. At least one of the dielectric layers is the wall of the discharge vessel. Both the first and second sets of electrodes are located external to the discharge vessel. Advantageously, the discharge vessel comprises an outer tubular portion with an internal surface and an inner tubular portion with an outward surface. The outer tubular portion surrounds the inner tubular portion, and the discharge volume is enclosed between the internal surface of the outer tubular portion and the outward surface of the inner tubular portion.

Dielectric barrier discharge lamp

A dielectric barrier discharge (DBD) lamp is disclosed. The DBD lamp comprises a discharge vessel, which encloses a discharge volume filled with discharge gas. The discharge vessel further comprises a phosphor layer within the discharge volume. The discharge vessel comprises an outer tubular portion having an internal surface, and an inner tubular portion having an outward surface. The outer tubular portion surrounds the inner tubular portion. In this manner, a substantially annular discharge volume is enclosed between the outer tubular portion and the inner tubular portion. The inner tubular portion comprises a multitude of protrusions around its circumference. The protrusions extend into the substantially annular discharge volume. A first set of interconnected electrodes and a second set of interconnected electrodes are also provided. The electrodes are isolated from the discharge volume by at least one dielectric layer, and at least one of the dielectric layers is constituted by the wall of the inner tubular portion.

There is disclosed a method for forming a discharge tube for a low-pressure discharge lamp. In the method, an end of a section of the discharge tube is fastened with first clamping means, and a second end of the section in held in an oriented position. The section is heated to a softening temperature, and a bending moment is exerted on the section between the first end and the second end for achieving the desired radius or direction of curvature of the section. The holding of the second end of the section and the exertion of the bending moment on the section are effected at least partly with another re-solidified section of the discharge tube which is adjacent to the softened first section. An apparatus for performing the method is also disclosed. The apparatus comprises first and second clamping means for positioning the ends of a bending section of the discharge tube in an oriented position relative to each other, and for exerting a bending moment on the ends. The second clamping means is also used for positioning the ends of a starting bending section relative to each other. Heating means are provided for heating the bending section to a softening temperature, and controllable support means for positioning the first and second clamping means. Control means are used for synchronizing the operation of the controllable support means. The first and second clamping means and the heating means are suitable for achieving a desired radius or direction of curvature of the bending sections heated to the softening temperature.

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Budapest, Hungary

József Tökés