Method of making replaceable lamp unit for use in automobile hea

Details Method of making replaceable lamp unit for use in automobile hea Method of making replaceable lamp unit for use in automobile hea

1987-02-06

1989-01-03

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

Combined, e.g., with shaping of lamp or device envelope

1562724, 445 27, H01J 934, H01K 308

Patent

active

047953888

ABSTRACT:
A method of making a replaceable lamp unit for use in an automobile headlight. The method involves the steps of providing a metallic insert with a roughened (e.g., sandblasted) surface. Inserting this member a predetermined depth within a plastic (e.g., thermoplastic) holder, and applying radio frequency (RF) induction heating to the insert. The unit's lamp may then be attached directly (e.g., clamped by an extension of the insert) or indirectly (e.g., via a two-part, separate clamp which is secured about the lamp and is welded to a forward, curved surface of the insert). Use of a roughened surface enhances the bonding operation between plastic holder and metallic insert by substantially reducing the time (e.g., from about 38 to 85 percent) for such bonding to occur. Reducing time at this step in the operation also facilitates alignment of the insert and other elements of the unit.

REFERENCES:
patent: 3315348 (1967-04-01), Donovan et al.
patent: 4528619 (1985-07-01), Dolan et al.
patent: 4569006 (1986-02-01), Bergin et al.
patent: 4623958 (1986-11-01), Linde et al.
patent: 4719543 (1988-01-01), Coliandris et al.

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