High pressure sodium arc discharge lamp with weldless arc tube s

Details High pressure sodium arc discharge lamp with weldless arc tube s High pressure sodium arc discharge lamp with weldless arc tube s

1991-02-26

1992-12-22

O'Shea, Sandra L.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313 1, 313634, H01J 6134, H01J 6130

Patent

active

051736322

ABSTRACT:
A high-pressure sodium arc discharge lamp having a novel arc tube support member which provides a secure mechanical and electrical connection and does not require welding between the support member and the arc tube lead wire or feedthrough. The support member may be adapted for mounting a single arc tube or two arc tubes within the outer envelope. The feedthrough of each arc tube is inserted into an aperture in the support member such that a secure interference fit is achieved. The interference fit is similar to the fastening of a threadless nut. In a preferred embodiment, the support member has a first planar surface having one or more apertures therein and two second planar surfaces substantially perpendicular to the first planar surface; each second planar surface has a protruding leg by which the support member may be mounted on the internal lamp frame. Several alternative designs are disclosed wherein, for example, the aperture may be circular or rectangular, the aperture may or may not have opposing tabs, and the cross section of the arc tube lead wire or feedthrough disposed within the aperture may be circular or rectangular.

REFERENCES:
patent: 2197220 (1940-04-01), Kost
patent: 2321158 (1943-06-01), Rees
patent: 2951959 (1960-09-01), Fraser et al.
patent: 3094640 (1963-06-01), Gustin
patent: 3326509 (1967-06-01), Kuttler
patent: 3882346 (1973-05-01), McVey
patent: 4287454 (1981-09-01), Feuersanger et al.
patent: 4689518 (1987-08-01), King
patent: 4924133 (1990-05-01), Dassler et al.
patent: 5055735 (1991-10-01), De Jong et al.

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