US3740686A - Ignition device for high pressure discharge lamps - Google Patents

Ignition device for high pressure discharge lamps Download PDF

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Publication number
US3740686A
US3740686A US00150481A US3740686DA US3740686A US 3740686 A US3740686 A US 3740686A US 00150481 A US00150481 A US 00150481A US 3740686D A US3740686D A US 3740686DA US 3740686 A US3740686 A US 3740686A
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US
United States
Prior art keywords
switch
lamp
arm
ballast
high pressure
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 - Lifetime
Application number
US00150481A
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English (en)
Inventor
D Nguyen
G Jarrige
J Jarrige
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
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 Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Application granted granted Critical
Publication of US3740686A publication Critical patent/US3740686A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/01—Details
    • H01H61/013—Heating arrangements for operating relays
    • H01H61/017—Heating by glow discharge or arc in confined space
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/02—Details
    • H05B41/04—Starting switches
    • H05B41/06—Starting switches thermal only

Definitions

  • the present invention concerns an igniting device for electrical discharge lamps containing mercury or sodium vapor at high pressure.
  • Igniting devices with electronic components which supply an electrical pulse-of sufficient amplitude have also been described, these devices presenting the draw back of continuing to operate when the lamp has just failed; this may create breakdowns in the electrical circuits as well as the transmission of parasites.
  • One object of the present invention is an igniting device for high pressure sodium or mercury vapor lamps enabling a quick restriking under hot condition.
  • Another object of the present invention is an igniting device which protects the electrical circuits against any break-down even .in case of failure of the lamp.
  • an igniting device for a high pressure vapor lamp having first and second terminals comprising, a self-induction type ballast having first and second output terminals, a thermal switch having first and second arms coupled to said first and second ballast terminals and to said first and second lamp terminals respectively, said first arm being stationary and said second arm having one fixed end and one movable end, said movable end being in contact with said first arm when said switch is closed and out of contact with said first arm when said switch is opened, and over-voltage protecting means connected in parallel with said lamp and to said movable end, said .2 I protecting means having a higher breakdown voltage than the igniting voltage of said lamp.
  • FIG. 1 represents the electrical diagram of theigniting device according to the present invention.
  • FIG. 2 represents a particular embodiment thermal switch.
  • the igniting device of the high pressure mercury or sodium vapor lamp 2 comprises, beside the ballast 1 of the self-induction-type usually used for stabilizing the lamp at its operation point, a thermal switch 3 and a lightning protector device 4.
  • the ballast 1 comprises two input terminals A and B connected to the supply line through a switch I and two output terminals A and B; the ballast comprises an induction coil 5 of suitable value for obtaining a stable operation point of the lamp 2.
  • the arm6 of the thermal switch 3 is fixed andconnected to oneof the output terminals of the ballast 1, for instance the terminal A, as well as to one of the two electrodes of the lightning protector device 4 and of the lamp 2; the arm 7 of the switch 3 is a moving part and constitutes the arm or finger distorted under the action of heating due to the electrical current which flows i 9 of the moving arm 7 is connected to the secondterminal B of the ballast.
  • the lightning protector device 4 is of any known type I and its features are such that its striking voltage is switch 3 is closed. As soon as the switch I is closed, a
  • the switch 3 If the lamp 2 is removed due to a failure, the switch 3 returns to the, or closed, rest position and initiates a re-striking since the switch I has remained closed; however, the over-voltage which appears between the contacts of the switch 3 is absorbed by the lightning protector device 4 and protects the leads and 11 against any breakdown.
  • FIG. 2 gives a particular embodiment of the thermal switch.
  • the thermal switch constituted by the arm 6 and the moving arm 7 is arranged inside an enclosure 15 such as a glass bulb in which a vacuum has been formed (pressure close to 10' torr, for'instance).
  • the switch is carried by the rigid conductorsl7 and 18 which are fixed in the lower part 16 of the bulb and which are connected respectively, inside the bulb, to the fixed end 9 of the bimetallic strips, and to'the fixed arm 6; outside the bulb, the conductors 17 and 18 are connected respectively to the terminals B and A of the ballast.
  • a third conductor 19 crosses through the lower part of the bulb and is connected, by means of a flexible wire 20 to the moving end 3 of the bimetallic strip 7; the other end of the conductor 19 is connected, outside the bulb, to one of the the two electrodes of the lightning protector device and of the lamp.
  • the element 21 contained in the bulb is the getter carrier which has been used for improving the vacuum.
  • the igniting device described hereabove is intended .particularly for high pressure sodium vapor lamps; however, itmay be used for high pressure mercury vapor lamps with. or without addition of metallic halogenides. ln the high pressure mercury vapor lamps without addition of metallic halogenides, ignition is generally obtained by means of a third electrode which would not be required if the device according to the invention was used;
  • An igniting device for a lighting circuit including a high pressure vapor lamp having first and second terminals comprising:
  • a self-induction type ballast having first and second output terminals
  • thermal switch enclosed in a hermetically sealed vacuum enclosure separate from said lamp and said ballast so that said lamp is extractable from said circuit when malfunctioning without removing said switch from said circuit
  • said thermal switch having first and second arms coupled to said first and second ballast terminals and to said first and second lamp terminals respectively, 1 said first arm being stationary and said second arm having one fixed end and one movable end, said movable end being in contact with said'first arm when said switch is closed and out of contact with said first arm when said switch is opened, said switch providing a short circuit across said lamp when closed to generate heat within said enclosure;
  • said second arm being a bimetallic strip movable to open said switch upon heat being stored in said hermetically sealed enclosure upon current flowing through said switch .whensaid switch is closed; and over-voltage protecting means connected in parallel with said lamp and to said movable end, v said protecting means having a higher breakdown voltage than the igniting voltage of said lamp.

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  • Circuit Arrangements For Discharge Lamps (AREA)
US00150481A 1970-06-25 1971-06-07 Ignition device for high pressure discharge lamps Expired - Lifetime US3740686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7023616A FR2094573A5 (enrdf_load_stackoverflow) 1970-06-25 1970-06-25

Publications (1)

Publication Number Publication Date
US3740686A true US3740686A (en) 1973-06-19

Family

ID=9057805

Family Applications (1)

Application Number Title Priority Date Filing Date
US00150481A Expired - Lifetime US3740686A (en) 1970-06-25 1971-06-07 Ignition device for high pressure discharge lamps

Country Status (2)

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US (1) US3740686A (enrdf_load_stackoverflow)
FR (1) FR2094573A5 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314181A (en) * 1979-06-18 1982-02-02 Kenichi Kawasumi Arc discharge lamp starting device
US4484109A (en) * 1980-11-18 1984-11-20 Johann Buser Ignition system for gas discharge lamps
US4567403A (en) * 1982-02-18 1986-01-28 Iwasaki Electric Co., Ltd. High pressure discharge lamp with incorporated starter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2022406A (en) * 1931-07-07 1935-11-26 Rca Corp Protective device in amplifier circuit
US2228210A (en) * 1939-03-29 1941-01-07 Westinghouse Electric & Mfg Co Gaseous relay device
US2274399A (en) * 1941-09-20 1942-02-24 Gen Electric Starting switch
US3496508A (en) * 1968-05-24 1970-02-17 Texas Instruments Inc Time delay switch for fluorescent lamps
US3546536A (en) * 1968-03-28 1970-12-08 Stanley Umin Means to indicate,control and cut off excessive x-radiation from television sets

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2022406A (en) * 1931-07-07 1935-11-26 Rca Corp Protective device in amplifier circuit
US2228210A (en) * 1939-03-29 1941-01-07 Westinghouse Electric & Mfg Co Gaseous relay device
US2274399A (en) * 1941-09-20 1942-02-24 Gen Electric Starting switch
US3546536A (en) * 1968-03-28 1970-12-08 Stanley Umin Means to indicate,control and cut off excessive x-radiation from television sets
US3496508A (en) * 1968-05-24 1970-02-17 Texas Instruments Inc Time delay switch for fluorescent lamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4314181A (en) * 1979-06-18 1982-02-02 Kenichi Kawasumi Arc discharge lamp starting device
US4484109A (en) * 1980-11-18 1984-11-20 Johann Buser Ignition system for gas discharge lamps
US4567403A (en) * 1982-02-18 1986-01-28 Iwasaki Electric Co., Ltd. High pressure discharge lamp with incorporated starter

Also Published As

Publication number Publication date
FR2094573A5 (enrdf_load_stackoverflow) 1972-02-04

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