H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/132
H01J 1/52 (2006.01) H01J 61/04 (2006.01)
Patent
CA 1150340
Abstract The present invention refers to a cathode unit intended for use in a fluorescent tube and designed in such a way that the service life of the tube is increased markedly as a result of a reduction in the loss of emission mater- ial from the cathode. These material losses are caused by, inter alia, ion bombardment and by vaporization of the emission material. In order to achieve a marked increase in the reflection of released atoms and molecules back to the cathode surface, both atoms and molecules which have been released through ion bombardment and atoms and molecules which have been vaporized from the cathode surface, the cathode is surrounded by an electrically conductive cathode shield in the form of a box-shaped casing which is electrically insulated from the cathode. An opening is made in the bottom of the shield for inserting the cathode. The open end of the shield is closed by means of a disc, preferably made of mica and provided with a centrally located hole. The hole diameter of the mica disc should be selected so that it is as small as possible while bearing in mind the fact that the starting voltage for the tube should not exceed a predetermined value.
364156
Fetherstonhaugh & Co.
Lumalampan Aktiebolag
LandOfFree
Cathode unit for fluorescent tube does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cathode unit for fluorescent tube, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cathode unit for fluorescent tube will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-272075