Gas discharge tube
First Claim
1. A gas discharge tube having a sealed envelope at least a part of which transmits light, said sealed envelope being filled with a deuterium gas and being provided with anode and cathode sections disposed therein, electric discharge being generated between said anode and cathode sections, so that the light-transmitting part of said sealed envelope emits predetermined light outside;
- said sealed envelope comprising;
a stem for setting said anode and cathode sections within said sealed envelope by way of respective stem pins independent from each other;
a first peripheral portion made of a metal firmly attached to a peripheral part of said stem;
a second peripheral portion made of a metal secured to said first peripheral portion by welding; and
a side tube, made of glass, surrounding said anode and cathode sections and having one end sealed with said second peripheral portion, wherein, at the sealed end of said side tube of said sealed envelope, said first peripheral portion, said second peripheral portion, and said side tube of said sealed envelope are nested in such a manner that at least a metal wall surface of at least one of said first and second peripheral portions is restricted from exposure to the deuterium gas in said sealed envelope.
1 Assignment
0 Petitions
Accused Products
Abstract
In the gas discharge tube of the present invention, for elongating the life of the discharge tube itself while lowering the assembling temperature, a side tube itself is formed from glass, and a metal is employed in a joint between a stem and the side tube. Namely, a metal-made first peripheral portion provided in the stem and a metal-made second peripheral portion provided in the side tube are utilized in the joint. As a result, the discharge tube itself can be made smaller.
16 Citations
4 Claims
-
1. A gas discharge tube having a sealed envelope at least a part of which transmits light, said sealed envelope being filled with a deuterium gas and being provided with anode and cathode sections disposed therein, electric discharge being generated between said anode and cathode sections, so that the light-transmitting part of said sealed envelope emits predetermined light outside;
-
said sealed envelope comprising;
a stem for setting said anode and cathode sections within said sealed envelope by way of respective stem pins independent from each other;
a first peripheral portion made of a metal firmly attached to a peripheral part of said stem;
a second peripheral portion made of a metal secured to said first peripheral portion by welding; and
a side tube, made of glass, surrounding said anode and cathode sections and having one end sealed with said second peripheral portion, wherein, at the sealed end of said side tube of said sealed envelope, said first peripheral portion, said second peripheral portion, and said side tube of said sealed envelope are nested in such a manner that at least a metal wall surface of at least one of said first and second peripheral portions is restricted from exposure to the deuterium gas in said sealed envelope. - View Dependent Claims (2, 3, 4)
-
Specification
-
- Resources
-
Current AssigneeHamamatsu Photonics KK
-
Original AssigneeHamamatsu Photonics KK
-
InventorsIkedo, Tomoyuki, Adachi, Kouzou, Ito, Yoshinobu, Matui, Ryotaro
-
Primary Examiner(s)Patel, Nimeshkumar D.
-
Assistant Examiner(s)HARPER, HOLLY R
-
Application NumberUS09/602,475Time in Patent Office1,075 DaysField of Search313/623, 313/634, 313/631, 313/632, 313/568, 313/572, 313/573US Class Current313/623CPC Class CodesH01J 61/10 Shields, screens, or guides...H01J 61/30 Vessels; ContainersH01J 61/302 characterised by the materi...H01J 61/35 provided with coatings on t...H01J 61/68 Lamps in which the main dis...H01J 63/02 Details, e.g. electrode, ga...H01J 63/08 Lamps with gas plasma excit...
