Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5064/41A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hanovia Ltd
Original Assignee
Hanovia Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hanovia LtdfiledCriticalHanovia Ltd
Publication of GB545747ApublicationCriticalpatent/GB545747A/en
H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
H01J61/822—High-pressure mercury lamps
Landscapes
Discharge Lamps And Accessories Thereof
(AREA)
Vessels And Coating Films For Discharge Lamps
(AREA)
Abstract
545,747. Discharge lamps. HANOVIA, Ltd. April 18, 1941, No. 5064. Convention date, May 18, 1940. [Class 39 (i)] In an ultra-violet discharge lamp having a filling of inert gas and metal vapour such as mercury, the latter is at a pressure of at least 0.5 atmospheres ; at least one electrode is activated, the minimum arc length is 50 cm. and the internal diameter of the quartz envelope is at least 17 mm. The power input is above 20 watts per cm. of arc length and curves are given showing the relation between arc length and tube diameter for given power inputs.
GB5064/41A1940-05-181941-04-18Improvements in and relating to electric discharge devices for producing radiant energy
ExpiredGB545747A
(en)