公开(公告)号：US3029359A

公开(公告)日：1962-04-10

申请号：US1830260

申请日：1960-03-29

Applicant: GEN ELECTRIC

Inventor： WHITE JOHN E

IPC: H01J61/067

CPC classification number: H01J61/0672

公开(公告)号：US3558964A

公开(公告)日：1971-01-26

申请号：US3558964D

申请日：1968-10-21

Applicant: GEN ELECTRIC

Inventor： WHITE JOHN E

IPC: H01J61/073 ,  H01J61/09 ,  H01J61/06 ,  H01J61/08 ,  H01J61/16

CPC classification number: H01J61/09

Abstract: A thermionically emitting hollow cathode for very high currents up to 400 amperes AC particularly suitable for xenon-filled wallstabilized lamps. It comprises a hollow cylindrical body of porous tungsten, open in the direction of the arc and having a coil of tungsten wire lining the cavity walls except for a region at the rear deep within the cavity. The cavity wall but not the face nor the outside of the electrode are impregnated with emission material, suitably barium thorate. The cooler shank end of the cavity in which the electrode coil does not extend serves as a dead space into which gas can expand during the AC cycle, thereby reducing the rate of gas flow in and out of the open end.

D R A W I N G

公开(公告)号：US2913629A

公开(公告)日：1959-11-17

申请号：US58215956

申请日：1956-05-02

Applicant: GEN ELECTRIC

Inventor： WHITE JOHN E

IPC: H01J9/04

CPC classification number: H01J9/045

公开(公告)号：US3619699A

公开(公告)日：1971-11-09

申请号：US3619699D

申请日：1970-05-25

Applicant: GEN ELECTRIC

Inventor： WHITE JOHN E

IPC: H01J61/073 ,  H01J61/06

CPC classification number: H01J61/0732

Abstract: A high-intensity electric discharge lamp having cavity electrodes operating in the hollow cathode mode. Penetration of the arc terminus into the electrode cavity is assisted by vapor breathing which injects plasma into the cavity during AC reignition after current zero. Breathing is favored by a cavity which is gastight and which has a depth not substantially greater than the terminus penetration. Relatively low temperatures deep within the cavity are avoided by providing enhanced thermal coupling between the forward end of the cavity member and the radiation shield surrounding it, and also by thermal insulation between the sides of the cavity member and the shield. Emission material located within the lower portion of the cavity favors deep terminus penetration. Projection of the radiation shield beyond the cavity member toward the other electrode is avoided.

公开(公告)号：US3219867A

公开(公告)日：1965-11-23

申请号：US19892162

申请日：1962-05-31

Applicant: GEN ELECTRIC

Inventor： WHITE JOHN E

IPC: H01J61/067 ,  H01J61/64

CPC classification number: H01J61/64 ,  H01J61/0672

公开(公告)号：US3243632A

公开(公告)日：1966-03-29

申请号：US17340762

申请日：1962-02-15

Applicant: GEN ELECTRIC

Inventor： WHITE JOHN E

IPC: H01J61/067 ,  H01J61/64

CPC classification number: H01J61/64 ,  H01J61/0677