The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1993
Filed:
May. 01, 1991
Walter Schoenherr, Giengen, DE;
Fritz Eckhardt, Gerstetten, DE;
Abstract
To connect a vitreous lamp bulb which has an essentially tubular extension 6) to a base lamp holding structure (2), the holding structure is formed with a cylindrical recess into which the tubular extension is fitted. The material of the lamp holding structure, or at least a portion adjacent the recess, is a high-temperature meltable plastic, and the extension portion is surrounded by a spiral spring or wire loops which, to attach the lamp to the base lamp holding structure, is subjected to a high-frequency electromagnetic field so that, by induction, the plastic surrounding the extension will melt, and embed the spiral or looped wires in the molten plastic while oozing towards the extension portion to securely grip the extension portion in the base lamp holding structure.