Electric lamp and discharge devices – With envelope – Having base and connector
Patent
1994-02-14
1995-10-31
Yusko, Donald J.
Electric lamp and discharge devices
With envelope
Having base and connector
31331803, 31331805, 31331808, 31331809, 439611, H01J 548
Patent
active
054632706
ABSTRACT:
An insulating base for a discharge lamp device which provides good insulation between a lead support connected to a front end lead of an arc tube and a lead disposed on the rear side of the arc tube. The insulating base includes a base main body formed of synthetic resin. The base main body is a disk-shaped injection molding which includes a lead support insertion hole in the form of a first longitudinal through hole for mounting a lead support supporting the front end portion of an arc tube and acting as a current path to a lead disposed on the front side of the arc tube, and a lead insertion hole in the form of a second longitudinal through hole for insertion of a lead disposed on the rear end side of the arc tube. The base main body is molded in such a manner that a separation wall area between the lead support insertion hole formed in the front surface of the base main body and the lead insertion hole faces molten resin injection gates provided in base main body molding metal molds, thereby preventing a weld portion from being produced in the separation wall area between the two holes.
REFERENCES:
patent: 5059855 (1991-10-01), Irisawa et al.
patent: 5126619 (1992-06-01), Wakimizu et al.
patent: 5270610 (1993-12-01), Schoenherr et al.
patent: 5291092 (1994-03-01), Coushaine
Motiduki Kunimasa
Nagasawa Masakazu
Wakimizu Yukio
Koito Manufacturing Co. Ltd.
Patel N. D.
Yusko Donald J.
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