Patent Treuhand Gesellschaft Fur Elektrische Gluhlampen Mbh

Osram Gesellschaft MIT Beschraenkter Haftung

Patent-treuhand-gesellschaft Fur Elektrisch Gluhlampen Mbh

Osram Ag

Michael Hülsemann

Jürgen Gräf

Andreas Hohlfeld

Karen Twesten

Anton Schlögl

Anton Schogl

The elongate bulb () of the lamp, which defines a longitudinal axis (A), is closed at opposite ends by sealing parts (), with in each case one cap being fitted at one end, the cap having an electrical contact element () which is connected in an electrically conductive manner to a supply conductor () leading to a luminous means, the contact element being accommodated in a tubular extension () of the sealing part; the contact element () has an attachment part () which is directed inward toward the lamp interior and is equipped with at least two barbs () which are in contact with the tubular extension ().

Lamp which is closed on two sides

The lamp comprises a discharge vessel () which is closed off in a vacuum-tight manner and is arranged in an outer bulb (), a getter material being held on a support body inside the outer bulb (). The support body is a support strip () to which the getter material is applied, the support strip being bent in such a way that it is automatically held in the outer bulb () without the need for any auxiliary means.

Electric lamp with outer bulb and associated support body

The process comprises the provision of a discharge vessel () which is closed off on one side, fitting a second tube over part of the discharge vessel and evacuating and filling the volume of the outer bulb via a pumping hole, which remains open in the second extension part within the second tube. This pumping hole is only closed at the end by means of an operation which closes it by rolling.

Process for producing an electric lamp with outer bulb

Growing community of inventors

Schönwalde, Germany

Michael Hülsemann