IE38743B1 - Improved incandescent lamp - Google Patents

Improved incandescent lamp

Info

Publication number
IE38743B1
IE38743B1 IE78/74A IE7874A IE38743B1 IE 38743 B1 IE38743 B1 IE 38743B1 IE 78/74 A IE78/74 A IE 78/74A IE 7874 A IE7874 A IE 7874A IE 38743 B1 IE38743 B1 IE 38743B1
Authority
IE
Ireland
Prior art keywords
phosphate
arsenate
metal
phosphates
compositions
Prior art date
Application number
IE78/74A
Other versions
IE38743L (en
Original Assignee
Thorn Lighting 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 Thorn Lighting Ltd filed Critical Thorn Lighting Ltd
Publication of IE38743L publication Critical patent/IE38743L/en
Publication of IE38743B1 publication Critical patent/IE38743B1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof

Abstract

1456242 Coated lamp envelopes THORN LIGHTING Ltd 18 Jan 1974 [19 Jan 1973] 2952/73 Heading B2E [Also in Divisions Cl and H1] A tungsten-halogen lamp has a glassy coating of a metal phosphate or arsenate on at least those portions of the internal components which tend to react with halogen. The coating may be derived from an aluminium phosphate complex or from a composition comprising aluminium phosphate and containing a titanium compound. The preferred metal phosphates and arsenates are those of metals of atomic numbers 12, 13, 14, 20-32, 39-50, 56-80, 90 and 92. By "phosphate" is meant ortho-, meta- and para-phosphates, phosphinates and phosphonates. The compositions may be applied as metal compound, an oxyacid phosphorus or arsenate, or a composition capable of forming such an oxyacid, in solution in a solvent which may be at least partly organic. The compositions yield the phosphate or arsenate on being heated. Suitable flowing compounds are oxides, hydroxides, halides, carbonates, hydrates, phosphates, perchlorates and cyanates, as well as salts of organic acid. Co-ordination complexes may also be used. The compositions preferably have atomic ratios of metal to phosphorus or arsenate of from 1:0.1 to 1:2.9. Preferred metals are aluminium, iron, chromium, titanium, vanadium and tin. [GB1456242A]
IE78/74A 1973-01-19 1974-01-14 Improved incandescent lamp IE38743B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB295273A GB1456242A (en) 1973-01-19 1973-01-19 Incandescent lamp

Publications (2)

Publication Number Publication Date
IE38743L IE38743L (en) 1974-07-19
IE38743B1 true IE38743B1 (en) 1978-03-29

Family

ID=9749149

Family Applications (1)

Application Number Title Priority Date Filing Date
IE78/74A IE38743B1 (en) 1973-01-19 1974-01-14 Improved incandescent lamp

Country Status (14)

Country Link
US (1) US3902091A (en)
JP (1) JPS5818744B2 (en)
BE (1) BE809912A (en)
CA (1) CA986980A (en)
DE (1) DE2402136C3 (en)
DK (1) DK140963B (en)
FR (1) FR2214969B1 (en)
GB (1) GB1456242A (en)
IE (1) IE38743B1 (en)
IT (1) IT1003464B (en)
LU (1) LU69186A1 (en)
NL (1) NL177538C (en)
SE (1) SE391836B (en)
ZA (1) ZA74275B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3982046A (en) * 1973-01-19 1976-09-21 Thorn Lighting Limited Incandescent lamps
US4256988A (en) * 1977-01-17 1981-03-17 Thorn Lighting Limited Incandescent halogen lamp with protective envelope coating
US4185922A (en) * 1977-01-17 1980-01-29 Thorn Electrical Industries Limited Method of introducing fluorine into a lamp
US4288713A (en) * 1979-11-23 1981-09-08 Gte Products Corporation Lamp having opaque coating
US5473226A (en) * 1993-11-16 1995-12-05 Osram Sylvania Inc. Incandescent lamp having hardglass envelope with internal barrier layer
DE4410968A1 (en) * 1994-03-29 1995-10-05 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh High pressure mercury lamp

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR747667A (en) * 1931-12-18 1933-06-22 Lampes Sa Composite glass intended for the manufacture of lamps
US2393469A (en) * 1942-08-03 1946-01-22 Corning Glass Works Fluorescent glass and lamp made therefrom

Also Published As

Publication number Publication date
IE38743L (en) 1974-07-19
BE809912A (en) 1974-05-16
JPS49104482A (en) 1974-10-03
NL7400812A (en) 1974-07-23
NL177538C (en) 1985-10-01
DE2402136A1 (en) 1974-07-25
DK140963B (en) 1979-12-10
IT1003464B (en) 1976-06-10
ZA74275B (en) 1975-05-28
DE2402136C3 (en) 1978-12-07
AU6468174A (en) 1975-07-24
NL177538B (en) 1985-05-01
US3902091A (en) 1975-08-26
LU69186A1 (en) 1974-04-08
FR2214969B1 (en) 1977-06-10
FR2214969A1 (en) 1974-08-19
DE2402136B2 (en) 1978-04-13
DK140963C (en) 1980-05-27
CA986980A (en) 1976-04-06
JPS5818744B2 (en) 1983-04-14
SE391836B (en) 1977-02-28
GB1456242A (en) 1976-11-24

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