Electric lamp and discharge devices – With magnetic device – Field transverse to discharge
Patent
1975-12-29
1977-05-03
Krawczewicz, Stanley T.
Electric lamp and discharge devices
With magnetic device
Field transverse to discharge
313180, H01J 1968
Patent
active
040216942
ABSTRACT:
In assembly of an incandescent lamp with a conventional glass envelope, filament and filament supporting lead wires, a wire, ribbon or like strip of metallic getter material is electrically connected between the lead wires in parallel with the filament. The getter strip is of a metallic material having a vapor pressure greater than one hundredth Torr at its melting point. After assembly electrical current is flashed through the lead wires and getter strip resistively heating the strip to vaporization and dispersing the getter metal in atomic state toward the interior walls and other locations within the lamp envelope. In transit to the walls the atomic metal adds to the gettering action at vaporization. And after flashing, the getter metal is deposited at reactive getter sites distributed throughout the interior of the lamp for continued gettering action during lamp operating life.
REFERENCES:
patent: 1636054 (1927-07-01), Holden
patent: 1965583 (1934-07-01), Foulke
patent: 2073885 (1937-03-01), Spanner et al.
patent: 2222005 (1940-11-01), Sutherlin
patent: 2444423 (1948-07-01), Braunsdorff
patent: 2489261 (1949-11-01), Braunsdorff
patent: 2533387 (1950-12-01), McLean
Grover James H.
GTE Sylvania Incorporated
Krawczewicz Stanley T.
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