GB857711A - Improvements in or relating to discharge lamp envelopes - Google Patents
Improvements in or relating to discharge lamp envelopesInfo
- Publication number
- GB857711A GB857711A GB10932/57A GB1093257A GB857711A GB 857711 A GB857711 A GB 857711A GB 10932/57 A GB10932/57 A GB 10932/57A GB 1093257 A GB1093257 A GB 1093257A GB 857711 A GB857711 A GB 857711A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wall
- groove
- envelope
- tube
- approximately
- Prior art date
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/33—Special shape of cross-section, e.g. for producing cool spot
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/18—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent
- H01J61/20—Selection of substances for gas fillings; Specified operating pressure or temperature having a metallic vapour as the principal constituent mercury vapour
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Discharge Lamp (AREA)
Abstract
857,711. Discharge lamps. GENERAL ELECTRIC CO. April 3, 1957 [April 19, 1956], No. 10932/57. Addition to 821,321. Class 39(1). A discharge lamp, particularly a fluorescent lamp, of the parent Specification having a vitreous envelope of generally tubular form with a transversely re-entrant groove extending longitudinally of the envelope to form a discharge space 1 with a kidney-shaped crosssection, has the regions of maximum stress at the bottom C of the concave groove forming wall portion 18 and at the convexly curved wall portions 19 and 19<SP>1</SP> on either side of the groove of increased wall thickness relative to the remainder of the envelope wall. The ratio of maximum to minimum wall thickness throughout the cross-section of the envelope is not in excess of approximately 3 : 1 and is preferably approximately 2 : 1. The side walls 21 and 21<SP>1</SP> of the groove are substantially straight portions inclined at an angle of more than 15 degrees, e.g. 27 degrees, to the medial plane through the groove. Concave inner wall 18 has a greater curvature than convex outer wall 17 and which can be three times as great, and convex wall portions 19 and 19<SP>1</SP> have a slightly greater inside curvature than concave wall 18. The filling comprises an inert gas, e.g. argon at a few mms. pressure, and mercury vapour at a pressure of 1 to 20 microns. The envelope can be made by drawing grooved and differentially thickened tubing directly or by reforming a differentially thickened tube of circular section. The reforming can be done by heating the round tube to its softening point and then clamping a suitable mould about it, or by heating the tube in a selected zone corresponding to the region of the groove to its softening temperature, e.g. approximately 540‹C. in the case of lime glass, and pressing on the tube in the heated region a plunger with a protuberance.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US341906XA | 1954-12-14 | 1954-12-14 | |
US856912XA | 1956-04-09 | 1956-04-09 | |
US857711XA | 1956-04-19 | 1956-04-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB857711A true GB857711A (en) | 1961-01-04 |
Family
ID=27364591
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34975/55A Expired GB802877A (en) | 1954-12-14 | 1955-12-06 | Improvements in low pressure discharge lamps |
GB35774/55A Expired GB821321A (en) | 1954-12-14 | 1955-12-13 | Resonance radiation discharge lamps |
GB9999/57A Expired GB856912A (en) | 1954-12-14 | 1957-03-27 | Improvements in or relating to tubular electric resonance radiation discharge lamps |
GB10932/57A Expired GB857711A (en) | 1954-12-14 | 1957-04-03 | Improvements in or relating to discharge lamp envelopes |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34975/55A Expired GB802877A (en) | 1954-12-14 | 1955-12-06 | Improvements in low pressure discharge lamps |
GB35774/55A Expired GB821321A (en) | 1954-12-14 | 1955-12-13 | Resonance radiation discharge lamps |
GB9999/57A Expired GB856912A (en) | 1954-12-14 | 1957-03-27 | Improvements in or relating to tubular electric resonance radiation discharge lamps |
Country Status (6)
Country | Link |
---|---|
BE (3) | BE556306A (en) |
CH (4) | CH341907A (en) |
DE (4) | DE1051398B (en) |
FR (4) | FR1162139A (en) |
GB (4) | GB802877A (en) |
NL (6) | NL105216C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004032180A2 (en) * | 2002-10-04 | 2004-04-15 | Koninklijke Philips Electronics N.V. | Low-pressure mercury vapour discharge lamp |
WO2003085695A3 (en) * | 2002-04-11 | 2005-05-06 | Koninkl Philips Electronics Nv | Low-pressure mercury vapor discharge lamp |
US7263878B2 (en) | 2002-04-17 | 2007-09-04 | Continental Teves Ag & Co. Ohg | Method for identifying tire characteristics |
US7276853B2 (en) | 2002-04-11 | 2007-10-02 | Koninklijke Philips Electronics, N.V. | Low-pressure mercury vapor discharge lamp |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL238268A (en) * | 1958-04-18 | |||
DE1153833B (en) * | 1958-12-17 | 1963-09-05 | Gen Electric Co Ltd | Electric sodium vapor discharge lamp |
JPS61135041A (en) * | 1984-12-06 | 1986-06-23 | ジー・テイー・イー・プロダクツ・コーポレイシヨン | Low pressure arc discharge lamp with increased voltage |
US4884007A (en) * | 1984-12-06 | 1989-11-28 | Gte Products Corporation | Low pressure arc discharge tube having increased voltage |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2213245A (en) * | 1935-12-23 | 1940-09-03 | Germer Edmund | Electrical discharge device |
FR802714A (en) * | 1936-02-12 | 1936-09-14 | Improvements to luminescent tubes | |
FR861799A (en) * | 1938-11-26 | 1941-02-17 | Lampes Sa | Improvements to light discharge devices |
BE469579A (en) * | 1940-03-01 | |||
US2482421A (en) * | 1943-10-21 | 1949-09-20 | Gen Electric | Flat tube electrical device |
FR907572A (en) * | 1944-04-22 | 1946-03-15 | Improvements to the internal device of the discharge tubes | |
US2445012A (en) * | 1946-10-29 | 1948-07-13 | Clarence H Van Orden | Luminous electrical discharge device |
-
0
- BE BE543614D patent/BE543614A/xx unknown
- NL NL216121D patent/NL216121A/xx unknown
- NL NL105871D patent/NL105871C/xx active
- NL NL106187D patent/NL106187C/xx active
- NL NL202747D patent/NL202747A/xx unknown
- NL NL202746D patent/NL202746A/xx unknown
- DE DENDAT1050443D patent/DE1050443B/de active Pending
- BE BE556663D patent/BE556663A/xx unknown
- NL NL105216D patent/NL105216C/xx active
- BE BE556306D patent/BE556306A/xx unknown
-
1955
- 1955-12-06 GB GB34975/55A patent/GB802877A/en not_active Expired
- 1955-12-13 GB GB35774/55A patent/GB821321A/en not_active Expired
- 1955-12-13 FR FR1162139D patent/FR1162139A/en not_active Expired
- 1955-12-13 DE DEG18571A patent/DE1051398B/en active Pending
- 1955-12-14 CH CH341907D patent/CH341907A/en unknown
- 1955-12-14 CH CH341906D patent/CH341906A/en unknown
- 1955-12-14 DE DEG18585A patent/DE1044274B/en active Pending
-
1957
- 1957-03-27 GB GB9999/57A patent/GB856912A/en not_active Expired
- 1957-04-02 FR FR71667D patent/FR71667E/en not_active Expired
- 1957-04-03 GB GB10932/57A patent/GB857711A/en not_active Expired
- 1957-04-04 FR FR71976D patent/FR71976E/en not_active Expired
- 1957-04-08 CH CH349696D patent/CH349696A/en unknown
- 1957-04-11 FR FR71978D patent/FR71978E/en not_active Expired
- 1957-04-15 DE DEG21912A patent/DE1054171B/en active Pending
- 1957-04-18 CH CH349340D patent/CH349340A/en unknown
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003085695A3 (en) * | 2002-04-11 | 2005-05-06 | Koninkl Philips Electronics Nv | Low-pressure mercury vapor discharge lamp |
US7276853B2 (en) | 2002-04-11 | 2007-10-02 | Koninklijke Philips Electronics, N.V. | Low-pressure mercury vapor discharge lamp |
US7263878B2 (en) | 2002-04-17 | 2007-09-04 | Continental Teves Ag & Co. Ohg | Method for identifying tire characteristics |
WO2004032180A2 (en) * | 2002-10-04 | 2004-04-15 | Koninklijke Philips Electronics N.V. | Low-pressure mercury vapour discharge lamp |
WO2004032180A3 (en) * | 2002-10-04 | 2005-08-25 | Koninkl Philips Electronics Nv | Low-pressure mercury vapour discharge lamp |
Also Published As
Publication number | Publication date |
---|---|
NL202746A (en) | |
FR71978E (en) | 1960-03-15 |
GB856912A (en) | 1960-12-21 |
DE1051398B (en) | 1959-02-26 |
CH341907A (en) | 1959-10-31 |
CH349696A (en) | 1960-10-31 |
DE1054171B (en) | 1959-04-02 |
BE543614A (en) | |
NL105216C (en) | |
GB802877A (en) | 1958-10-15 |
NL106187C (en) | |
BE556306A (en) | |
FR71667E (en) | 1960-01-13 |
GB821321A (en) | 1959-10-07 |
NL202747A (en) | |
DE1044274B (en) | 1958-11-20 |
NL105871C (en) | |
FR1162139A (en) | 1958-09-09 |
FR71976E (en) | 1960-03-15 |
CH341906A (en) | 1959-10-31 |
CH349340A (en) | 1960-10-15 |
DE1050443B (en) | |
BE556663A (en) | |
NL216121A (en) |
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