Thorn Electrical Industries Limited

Burroughs, Inc.

Arthur Samuel Vause

Kenneth Scott

Ben Grewcock

Frank Woodward

In a lamp such as a GLS incandescent filament lamp the cap comprises a metal shell and an electrically insulating base, the base being formed in two parts preferably moulded of synthetic resin and formed to interfit with one another, of which the first part has passages for the lead-in wires from the lamp envelope such that the free ends of the wires lie between the first and second parts and the second part carries one or more electrical contact members to engage the lead-in wires and form the terminal(s) of the lamp.

Cap assemblies for lamps

An electric lamp assembly for use in sealed beam lighting units comprises a sealed envelope containing a light source mounted in an integnally flanged cap. Electrical supply leads pass through hermetic seals in the cap, and means are provided which support the light source in a predetermined position relative to the cap flange.

Electric lamps mounted in a flanged cap

An electric discharge lamp includes a structure within the discharge envelope comprising a source of at least one halogen, metal or metal halide to serve as an arc-modifying additive, enclosed in the structure from which it is capable of being released into the discharge envelope upon subsequent treatment, for example on heating or on striking an arc. The structure preferably comprises a hollow carrier body of refractory metal, in which the source of halogen, metal or metal halide is disposed, and may be covered by a closure of porous sintered refractory metal or of fusible metal. The fusible metal may be inert as regards the discharge and may itself affect the emitted radiation characteristics. The structure may constitute one electrode of the lamp, and may also include electron-emissive material. It has the advantage of protecting the additives from the atmosphere and thereby simplifying manufacture of the lamp.

Discharge lamp component

The present invention relates to electric light sources such as may be used in sealed beam lighting units. An electric lamp assembly comprises a sealed envelope containing a light source mounted in a flanged lamp cap. Terminal pins pass through hermetic seals in the cap and support the light source in a predetermined position relative to the cap flange.

Lamp cap assembly

A lighting unit has a lamp supported in position relative to a reflector by means of a support including a holder which clasps an end seal of the lamp envelope or capping box fitted to the end seal, a co-operating rib and groove in the holder and end seal or in the holder and the capping box serving to locate the lamp against axial movement. For a double-ended lamp two holders are provided on a common support.

Growing community of inventors

London, United Kingdom

Arthur Samuel Vause