Arc discharge lamp having improved performance

Details Arc discharge lamp having improved performance Arc discharge lamp having improved performance

1988-10-31

1990-01-02

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

313623, H01J 6130

Patent

active

048915548

ABSTRACT:
An improved high intensity arc discharge lamp is disclosed having curved projection means included when a bowed shape arc discharge is being closed to preclude molten vitreous material from deforming the internal cavity. In this manner, the arc tube internal cavity is more reliably shaped and sized with the discharge electrodes being more accurately positioned within the internal cavity. Such curved projection means are provided in each pinch seal region of the arc tube and can be formed mechanically with the jaw members ordinarily employed for the pinch sealing operation.

REFERENCES:
patent: 4007397 (1977-02-01), Lake
patent: 4056751 (1977-11-01), Gungle et al.
patent: 4498027 (1985-02-01), Kavlotski et al.
patent: 4581557 (1986-04-01), Johnson

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