Method of forming a metal halide discharge tube and...

Details Method of forming a metal halide discharge tube and... Method of forming a metal halide discharge tube and...

2007-04-17

2007-04-17

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

C445S027000

Reexamination Certificate

active

10792625

ABSTRACT:
A method of forming a metal halide discharge tube comprises: arranging a tubular body (110) in an essentially vertical orientation; disposing a loose-fit T-plug (100) having a cylindrical portion (106) and an annular flange (104) in an upper open end of the tubular body (110) so that the cylindrical portion (106) of the T-plug (100) is disposed within the open end of the tubular body (110) in a contact-free, spaced relationship with an inner wall of the tubular body and with the annular flange (104) seating against an annular top end edge surface (108) of the tubular body (100); and firing the tubular body and the loose-fit T-plug to shrink fit the tubular body and the loose-fit T-plug to interfuse the loose-fit T-plug with the upper end of the tubular body in a manner which results in a unitary/monolithic body.

REFERENCES:
patent: 4765820 (1988-08-01), Naganawa et al.
patent: 4808882 (1989-02-01), Parker et al.
patent: 4987028 (1991-01-01), Kandachi et al.
patent: 5592048 (1997-01-01), Wei et al.
patent: 6274982 (2001-08-01), Scott et al.

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