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US2794141A - Discharge lamp - Google Patents

Discharge lamp Download PDF

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Publication number
US2794141A
US2794141A US356337A US35633753A US2794141A US 2794141 A US2794141 A US 2794141A US 356337 A US356337 A US 356337A US 35633753 A US35633753 A US 35633753A US 2794141 A US2794141 A US 2794141A
Authority
US
United States
Prior art keywords
discharge tube
tube
discharge
turns
helical
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
US356337A
Other languages
English (en)
Inventor
Kolkman Dirk
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips 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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US2794141A publication Critical patent/US2794141A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J61/34—Double-wall vessels or containers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
    • H01J61/547—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode outside the vessel
    • 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
    • H01J61/80—Lamps suitable only for intermittent operation, e.g. flash lamp

Definitions

  • the invention relates to a discharge lamp comprising a helical discharge tube, a bulb which is pervious to light and surrounds the discharge tube, and a wire-shaped ignition electrode, being externally in contact with the discharge tube.
  • the ignition electrode is shaped in the form of a helical wire-tube, the turns of which are in contact with the bulb and with two adjacent turns of the discharge tube.
  • the outer diameter of the wire-tube is preferably equal to the distance between two adjacent turns of the discharge tube plus about one third of the outer diameter of the discharge tube in order that the ignition electrode should absorb a minimum of light, while a rigid construction is obtained.
  • the helical wire-tube is preferably constituted by a primary helix wound to form a secondary helix.
  • reference numeral 1 designates a discharge tube of glass or quartz, filled with xenon or other suitable discharge medium.
  • the discharge tube has an outer diameter of about 6 mms, and is wound in about 4%. turns to form a cylindrical helix having an outer diameter of about 25 mms. and a pitch of about 7 mms.
  • the discharge tube is surrounded by a substantially cylindrical glass bulb 2, having an inner diameter of about 28 mms.
  • the axis of the discharge tube coincides with the axis of the cylindrical part of the bulb.
  • the upper Patented May 28, 1957 end of the bulb is closed semi-spherically.
  • the bottom end of the bulb is open; to this end is secured a socket 3, having contact pins.
  • the pins 4 and 5 are connected electrically by means of stay wires 6 and 7 to the main electrodes 8 and 9 of the discharge tube.
  • the lamp furthermore comprises an ignition electrode 10, which is made of, for example, nickel-chromium wire of about 200 in thickness and which is wound to form a (primary) helix of about 3 mms. in outer diameter, having a pitch of about 3 mms.
  • This wire-tube it) is arranged parallel to the turns of the discharge tube on the periphery thereof in about 3 /2 turns in a manner such that the secondary helical turns of the wire-tube thus formed are in contact each with two adjacent turns of the discharge tube and with the inner wall of the cylindrical part of the bulb.
  • the outer diameter of the secondary helix corresponds, of course, to the inner diameter of the cylindrical part of the bulb 2.
  • the ends of the ignition electrode 10 are secured to the discharge tube by means of wire rings 11, of which one is connected electrically to an additional pin 12 of the socket 3.
  • the element 10 consequently, operates not only as an ignition electrode but also as a fastening means for the discharge tube.
  • a discharge lamp comprising a light-transparent envelope having a longitudinal axis, a light-transparent sealed gas-filled discharge tube disposed within said envelope, said discharge tube being wound in a helical form whose central axis extends parallel to the longitudinal axis of the envelope, a pair of electrodes disposed within opposite ends of said discharge tube, and an ignition electrode for said discharge tube, said ignition electrode being a helical wire tube embracing the helical discharge tube, said helical wire tube being wound to form a secondary helix aligned with and surrounding the helical discharge tube, the turns of said helical wire tube lying in the space between two adjacent turns of said helical discharge tube and abutting said two turns, the surface of said helical wire tube being in engagement with the inner wall of said envelope.
  • a discharge lamp as claimed in claim 1 wherein the outer diameter of the helical wire tube is about equal to the sum of the distance between two adjacent turns of the discharge tube and about one-third of the outer diameter of the discharge tube.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
US356337A 1952-06-23 1953-05-21 Discharge lamp Expired - Lifetime US2794141A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL725761X 1952-06-23

Publications (1)

Publication Number Publication Date
US2794141A true US2794141A (en) 1957-05-28

Family

ID=19817805

Family Applications (1)

Application Number Title Priority Date Filing Date
US356337A Expired - Lifetime US2794141A (en) 1952-06-23 1953-05-21 Discharge lamp

Country Status (6)

Country Link
US (1) US2794141A (nl)
BE (1) BE520901A (nl)
DE (1) DE940922C (nl)
FR (1) FR1079488A (nl)
GB (1) GB725761A (nl)
NL (2) NL80734C (nl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2295563A2 (fr) * 1974-12-16 1976-07-16 Central Eclairage Lab Lampe a decharge dans la vapeur de sodium a haute pression

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399222A (en) * 1941-11-08 1946-04-30 Germeshausen Kenneth Joseph Flash-photography apparatus
US2650321A (en) * 1946-12-18 1953-08-25 Gen Electric Lamp unit and support structure therefor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2399222A (en) * 1941-11-08 1946-04-30 Germeshausen Kenneth Joseph Flash-photography apparatus
US2650321A (en) * 1946-12-18 1953-08-25 Gen Electric Lamp unit and support structure therefor

Also Published As

Publication number Publication date
BE520901A (nl)
NL170526C (nl)
DE940922C (de) 1956-03-29
GB725761A (en) 1955-03-09
NL80734C (nl)
FR1079488A (fr) 1954-11-30

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