GB1330045A - Small-sized fluorescent lamp - Google Patents

Small-sized fluorescent lamp

Info

Publication number
GB1330045A
GB1330045A GB2285471A GB2285471A GB1330045A GB 1330045 A GB1330045 A GB 1330045A GB 2285471 A GB2285471 A GB 2285471A GB 2285471 A GB2285471 A GB 2285471A GB 1330045 A GB1330045 A GB 1330045A
Authority
GB
United Kingdom
Prior art keywords
tube
electrodes
electrode
lamp
dimension
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
Application number
GB2285471A
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics Corp
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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Publication of GB1330045A publication Critical patent/GB1330045A/en
Expired legal-status Critical Current

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
    • 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

Abstract

1330045 Fluorescent discharge lamps MATSUSHITA ELECTRONICS CORP 19 April 1971 [3 March 1970] 22854/71 Heading H1D In a fluorescent discharge lamp having a rated lamp current of less than 125 mA the inside diameter B of at least one of the end tube portions which contains one of a pair of electrodes 3, 4 is between 8 and 13 mm. and the inside diameter A of the intermediate tube portion is between 6 and 8 mm. The electrodes 3 and 4 are coils containing an electron-emitting substance. Curves are provided (Figs. 2-5, not shown) showing the effect of the dimensions A and B on tube current, temperature at the closed end, relative brightness, light flux per unit length and relative light efficiency for lamps in which C = 15 mm. and l = 40 mm. Dimension B must be sufficiently large to prevent blackening of the envelope by oxides from the electrodes. The filling is mercury plus a rare gas at a pressure of several mm. Hg. and the tube wall should be maintained at a temperature of about 40‹ C. for optimumexcitation of the fluorescent coating 2. If the lamp is operated on D.C. only one electronemitting electrode is necessary and the other electrode may be a plain piece of metal. The dimension A is then maintained uniform to the end of the tube at which the latter electrode is located (Fig. 6, not shown).
GB2285471A 1970-03-03 1971-04-19 Small-sized fluorescent lamp Expired GB1330045A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1858270 1970-03-03

Publications (1)

Publication Number Publication Date
GB1330045A true GB1330045A (en) 1973-09-12

Family

ID=11975608

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2285471A Expired GB1330045A (en) 1970-03-03 1971-04-19 Small-sized fluorescent lamp

Country Status (4)

Country Link
CA (1) CA921541A (en)
DE (1) DE2109898B2 (en)
FR (1) FR2084100A5 (en)
GB (1) GB1330045A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911356A1 (en) * 1978-03-22 1979-10-18 Ici Ltd PAINTING AGENTS
JPS60151947A (en) * 1984-01-19 1985-08-10 Ushio Inc Small-size fluorescent lamp
JPS60151948A (en) * 1984-01-19 1985-08-10 Ushio Inc Small-size fluorescent lamp
JPS60151950A (en) * 1984-01-19 1985-08-10 Ushio Inc Small-size fluorescent lamp
JPS6171954U (en) * 1984-10-17 1986-05-16
GB2169440A (en) * 1984-12-14 1986-07-09 Matsushita Electric Works Ltd High pressure discharge lamp
JPS6399757U (en) * 1986-12-18 1988-06-28
EP0348943A1 (en) * 1988-06-30 1990-01-03 Toshiba Lighting & Technology Corporation Fluorescent lamp
WO2001075937A1 (en) * 2000-03-31 2001-10-11 Koninklijke Philips Electronics N.V. Discharge lamp

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL181470C (en) * 1977-08-23 1987-08-17 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.
DK480477A (en) 1976-11-02 1978-05-03 Philips Nv LOW PRESSURE MERCURY VOLUME STEAM DISCHARGE LAMP
NL7811351A (en) * 1978-11-17 1980-05-20 Philips Nv LOW-PRESSURE MERCURY DISCHARGE LAMP.
US4724361A (en) * 1984-12-14 1988-02-09 Matsushita Electric Works, Ltd. High pressure discharge lamp
FR2588119B1 (en) * 1985-09-27 1987-11-27 Philips Eclairage SMALL DIMENSIONAL DISCHARGE LAMP USED AS A SOURCE OF ULTRAVIOLET RADIATION
EP0764341A1 (en) * 1995-04-05 1997-03-26 Wedeco Umwelttechnologie Wasser-Boden-Luft GmbH Low-pressure mercury vapour discharge lamp

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2911356A1 (en) * 1978-03-22 1979-10-18 Ici Ltd PAINTING AGENTS
JPH024101B2 (en) * 1984-01-19 1990-01-26 Ushio Electric Inc
JPS60151947A (en) * 1984-01-19 1985-08-10 Ushio Inc Small-size fluorescent lamp
JPS60151950A (en) * 1984-01-19 1985-08-10 Ushio Inc Small-size fluorescent lamp
JPS60151948A (en) * 1984-01-19 1985-08-10 Ushio Inc Small-size fluorescent lamp
JPH024097B2 (en) * 1984-01-19 1990-01-26 Ushio Electric Inc
JPH024098B2 (en) * 1984-01-19 1990-01-26 Ushio Electric Inc
JPS6171954U (en) * 1984-10-17 1986-05-16
JPH0452930Y2 (en) * 1984-10-17 1992-12-11
GB2169440A (en) * 1984-12-14 1986-07-09 Matsushita Electric Works Ltd High pressure discharge lamp
GB2169440B (en) * 1984-12-14 1989-08-16 Matsushita Electric Works Ltd High pressure discharge lamp
JPS6399757U (en) * 1986-12-18 1988-06-28
JPH0455407Y2 (en) * 1986-12-18 1992-12-25
EP0348943A1 (en) * 1988-06-30 1990-01-03 Toshiba Lighting & Technology Corporation Fluorescent lamp
WO2001075937A1 (en) * 2000-03-31 2001-10-11 Koninklijke Philips Electronics N.V. Discharge lamp

Also Published As

Publication number Publication date
DE2109898B2 (en) 1974-11-14
DE2109898A1 (en) 1971-09-23
FR2084100A5 (en) 1971-12-17
CA921541A (en) 1973-02-20

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee