US3622832A - Interchangeable tungsten halogen lamp - Google Patents

Interchangeable tungsten halogen lamp Download PDF

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Publication number
US3622832A
US3622832A US37395A US3622832DA US3622832A US 3622832 A US3622832 A US 3622832A US 37395 A US37395 A US 37395A US 3622832D A US3622832D A US 3622832DA US 3622832 A US3622832 A US 3622832A
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US
United States
Prior art keywords
lamp
envelope
filament
lamps
tungsten halogen
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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
US37395A
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English (en)
Inventor
Joseph H Schlessel
Fred M Pintus
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Airequipt Inc
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Airequipt Inc
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Publication date
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Publication of US3622832A publication Critical patent/US3622832A/en
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K1/00Details
    • H01K1/42Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp
    • H01K1/46Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp supported by a separate part, e.g. base, cap
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K1/00Details
    • H01K1/18Mountings or supports for the incandescent body
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K7/00Lamps for purposes other than general lighting
    • H01K7/02Lamps for purposes other than general lighting for producing a narrow beam of light; for approximating a point-like source of light, e.g. for searchlight, for cinematographic projector

Definitions

  • ABSTRACT An incandescent lamp of the type known as a halogen cycle lamp having a quartz envelope selectively positioned in a supporting base of the socket-type having a centering and stabilizing pin and surrounding electric prongs and formed for use interchangeably in sockets adapted for regular incandescent lamps.
  • the present invention relates to an improved lamp of the type used for forming a high-intensity light beam in a picture projector or similar device and more particularly to an improved halogen cycle lamp adapted for interchangeable use with regular incandescent lamps in such devices.
  • incandescent lamp known as a quartz iodine or tungsten halogen lamp is being used for film projectors and other devices having both a longer lamp life and a reduced aging or darkening effect as compared with regular vacuum-type incandescent filament lamps.
  • the tungsten halogen lamp of the present invention is suited by its particular structure and method of formation to have both an overall effective size and a mounting base equivalent to and interchangeable with the regular incandescent projection lamps, such as those identified in the lampmaking industry as the 500-watt CZA lamp or the 500-watt DAK lamp and others.
  • the lamp in accordance with the invention may also be made in a variety of wattage and voltage ratings with no change in mounting and for use in the same devices interchangeably with such 500-watt lamps, as the tungsten halogen lamps of as high as LOGO-watt rating will operate satisfactorily in a cooling system normally used for the 500- watt regular incandescent lamps.
  • the lamp in accordance with the present invention employs a tungsten filament in a heat resistant quartz or high silica heat resistant envelope which will operate satisfactorily at 600 C.
  • the envelope is filled with the usual gas filling plus a quantity of a halogen which serves as a regenerative getter.
  • a halogen which serves as a regenerative getter.
  • Tungsten vapors which are volatilized from the hot filament, and which are in a regular incandescent lamp deposited on the bulb walls, combine chemically with the halogen to form a tungsten-halogen compound which migrates to the vicinity of the filament where it releases the tungsten for redeposit of the filament.
  • the halogen is then free to combine with additional tungsten to repeat this cycle. Lamps of this type employing iodine as the getter are disclosed, for example, in US. Pat. No. 2,883,571 issued Apr. 21, I959.
  • an object of the present invention is to provide an improved high intensity lamp of the type used in picture projectors and the like.
  • Another object of the present invention is to provide a lamp of the quartz iodine or tungsten halogen type which is fully interchangeable with prior lamps and particularly with prior prefocused lamps having keyed pin-type bases.
  • Another object of the present invention is to provide an iodine cycle or tungsten halogen lamp for use with a keyed lamp base and adapted for being precisely focused or optically oriented during lamp assembly.
  • FIG. I is a perspective view particularly cut away of a preferred embodiment of the lamp in accordance with the present invention.
  • FIG. 2 is a diagrammatic view illustrating a preferred embodiment of a lamp in accordance with the present invention in a typical projector optical system
  • FIG. 3 is a vertical section of the lamp taken along line 33 of FIG. 1;
  • FIG. 4 is a front-elevational view partially cut away of the lamp of FIG. 1;
  • FIGS. 5 and 6 are horizontal sectional views through the filament portions of lamps illustrating two embodiments of reflecting elements.
  • the lamp 1 comprises a temperature resistant transparent envelope 2 such as a high silica glass or quartz envelope capable of withstanding temperatures in excess of 600 C.
  • the envelope 2 contains a tungsten filament 3 and is designed to operate as a tungsten halogen lamp in the manner described above for the tungsten halogen or quartz iodine cycle. As indicated, this cycle is obtained by placing the walls of the envelope 2 in close proximity to the filament 3 for operation at higher than normal temperatures and by including a halogen such as iodine in the atmosphere in the envelope 2 so that the iodine acts as a getter in the tungsten halogen cycle as described above.
  • a preferred form of the filament 3 is shown forming a generally planar area by a zigzag two-layer arrangement of the coiled tungsten wires as illustrated at 3.
  • This filament arrangement is mounted on support and electrical lead rods 9 using horizontal quartz or high-silica glass insulators 10 and support wires 10' to obtain the planar form and to connect the opposite ends of the filament 3 to a source of voltage through terminal pins 6 in base 4.
  • a reflector 11 preferably is mounted with the envelope 2 and behind the filament 3 to increase the efficiency of the lamp 1 by a forward reflection of the filament light.
  • the novel lamp mounting of the present invention provides for an effective initial focusing or aligning of the filament 3 and for a subsequent retention of the focusing position throughout lamp life and independently of the particular projector or system in which the lamp I is used.
  • FIG. 2 illustrates diagrammatically a lamp I mounted in a typical projector optical system.
  • This system may be of the type now commonly used for the above mentioned regular incandescent projector lamps such as the CZA- or DAK-type.
  • a lamp socket 15 is provided at a suitable lamp housing 16.
  • This socket 15 preferably is of the type for providing an exact positioning of the projector lamp both with respect to its height as well as the axial position of the lamp filament to obtain the advantages of prefocusing or prealigning of the lamp to provide maximum lamp intensity along the optical axis 17 of the system.
  • the tungsten halogen lamp 1 in accordance with the invention is shown in the system in the housing 16 adjacent to suitable and typical condenser lenses 14 and behind a transparent slide 18 which is being projected through a conventional projection lens (not shown).
  • a reflector is illustrated in the lamp housing 16 for use in systems where no reflector is provided in the lamp 1 itself.
  • a preferred embodiment of the lamp includes an internal reflector 11 positioned within the envelope 2.
  • the preferred lamp 1 includes a mounting which facilitates the initial focusing or aligning of the lamp filaments 3 and which provides for the retention of its focusing of alignment throughout lamp life even where the lamp is used interchangeably in projector systems which may have been designed for using regular incandescent lamps.
  • the preferred embodiment of the lamp mounting comprises a lamp base 4 preferably having a hollow metallic outer shell 20 including an integral-keyed central guide pin 5 for orienting and firmly positioning the lamp 1 in a socket.
  • the high-silica glass or quartz envelope 2 has a lower mounting portion of reduced cross section and normally solid as illustrated at 8 in FIG. 3 and which is inserted in a slot 19 provided in the preformed ceramic collar 7.
  • the collar 7 is preferably formed of a heat resistant and electrically insulating material such as a ceramic of the type having a relatively low coefficient of expansion.
  • the color 7 may conveniently be preformed or precast in the shape desired and so that the metal shell 20 may be thereafter attached to the collar 7 as for example by having an upper bead 21 pressed or rolled against a cooperating bead 22 on the collar 7.
  • the mounting slot 19 in the collar 7 is seen to include a central portion formed slightly larger than the cross section of the envelope 2 at its lower portion 8 and to have two projecting portions 23 to facilitate the couplingof one rod 9 by lead wire 24 to one terminal pin 6 and the other rod 9 by a lead wire 25 to another terminal pin 6.
  • the terminal pins 6 are hollow pins to receive wires 24 and 25 and may be inserted in suitable apertures in the collar 7 being press fit, integrally molded or cemented therein.
  • the portions 23 of the slot 19 expose the tops of the pins 6 to facilitate the insertion and attachment of lead wires 24 and 25 to rods 9 as the glass envelope 2 is inserted into the collar 7.
  • One of the connecting lead wires 24 or 25 may be formed of fuse wire to protect the projectors lamp circuit.
  • the slot 19 in the collar is formed larger than the corresponding lower portion 8 of the transparent envelope 2.
  • ceramic cement 27 is inserted into this space as well as into the portions of the slot 23 above the pins 6 to complete the mounting of the envelope 2 in the collar 7.
  • the lamp base 4 is inserted into a socket in a calibrating system and the envelope is shifted with respect to the collar 7 so that most effective use is made of the filament 3 as indicated by the light intensity showings in a lamp calibrating system which may correspond generally to the system of FIG. 2 and where the lamp envelope is adjusted to obtain the maximum concentration and best positioning of the lamp beam at the optical center 17 of the system.
  • the above described improved mounting permits the envelope 2 to be moved or tilted forward and back or from sideto-side within the collar 7.
  • the height of the completed envelope 2 within the collar is determined by moving the rods 9 of the envelope assembly down against the collar 7 base and these rods 9 are precisely cut a predetermined distance from the filaments 3 to obtain an effective initial height adjustment of the envelope 2. If necessary, the height may also be adjusted during the above described securing or aligning operation.
  • FIGS. 3 and 5 illustrate an interior lamp reflector 11 having a concave reflecting area. This type of reflector is particularly effective, however, other forms may be used.
  • FIG. 6, illustrates a reflector 13 formed on the interior surface of the envelope 2. In either case, the reflector may reflect both light and heat back through the filament or the reflector may be of the dichroic-type for providing a substantial light reflection while permitting heat to pass throu the reflector.
  • ty lamp of the tungsten halogen-type having a mounting which permits the lamp to be prefocused and aligned and to be thereafter precisely mounted in projection systems and to obtain maximum advantage of the prefocusing or aligning.
  • a tungsten halogen lamp has been provided which is interchangeable with the present projector lamps of the incandescent-type so that the long life and more uniform life intensity characteristics of the tungsten halogen lamp may be obtained in present projectors designed for the present incandescent lamps and without modifications of their optical systems.
  • the improved lamp may be used interchangeably by both'manufacturers and users so that the advantages of the tungsten halogen lamp may be obtained when desired in otherwise conventional projectors or similar devices.
  • a tungsten halogen projector lamp comprising:
  • a transparent heat resistant quartz envelope of generally rectangular vertical cross section and circular horizontal cross section and terminating in a centrally positioned pinched-in mounting portion
  • a generally planar tungsten filament within the envelope being positioned centrally thereof and intersecting and being parallel to the envelope axis 0.
  • a pair of spaced vertical rods mounting said filament and attached to said pinched-in portion of said envelope;
  • a lamp base comprising an outer hollow metal shell and a heat resistant and electrically insulating inner collar attaching the envelope to the shell, the metal shell including a keyed guide pin, a plurality of terminal pins mounted in the collar and electrically coupled to said rods, the upper surface of the lamp base having a slot formed therein larger than the cross section of the lower portion of the envelope for adjustably positioning and supporting the pinched-in lower end of the envelope vertically and horizontally of the base for positioning the filament on an axis of a projection-optical system, the lower end of the envelope being adhered to the base in its adjusted position inthe'slot by an adhesive filling the space between the lower end of the envelope and the collar.
  • a lamp as claimed in claim 1 in which a light reflector is positioned within the envelope adjacent the filament.

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US37395A 1967-01-24 1970-05-11 Interchangeable tungsten halogen lamp Expired - Lifetime US3622832A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61141767A 1967-01-24 1967-01-24
US3739570A 1970-05-11 1970-05-11

Publications (1)

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US3622832A true US3622832A (en) 1971-11-23

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NL (1) NL6717374A (ja)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3885149A (en) * 1972-04-14 1975-05-20 Thorn Electrical Ind Ltd Lamp pinch seals
US3909653A (en) * 1969-05-02 1975-09-30 Westinghouse Electric Corp Compact electric incandescent lamp having planar filament and improved mount
DE2821459A1 (de) * 1977-05-20 1978-11-30 Gte Sylvania Inc Wolfram-halogen-gluehlampe hoher wattleistung
US4150316A (en) * 1977-01-13 1979-04-17 Gte Sylvania Incorporated Incandescent projection lamp with internal reflector having light defining opening therein
US4243907A (en) * 1979-07-05 1981-01-06 Gte Products Corporation Lamp having reduced width press-seal
FR2496339A1 (fr) * 1980-12-16 1982-06-18 Philips Nv Lampe electrique a incandescence a pincement scelle au ciment dans le culot
US4470104A (en) * 1981-12-24 1984-09-04 General Electric Company Automotive inner-bulb assembly
US4499404A (en) * 1982-08-05 1985-02-12 General Electric Company Incandescent lamp with ceramic base
US5382805A (en) * 1993-11-01 1995-01-17 Fannon; Mark G. Double wall infrared emitter
US5471063A (en) * 1994-01-13 1995-11-28 Trojan Technologies, Inc. Fluid disinfection system
USD415103S (en) * 1998-08-06 1999-10-12 Dal Partnership Compact fluorescent bulb socket
USD415104S (en) * 1998-08-06 1999-10-12 Dal Partnership Compact fluorescent bulb socket
US6399955B1 (en) 1999-02-19 2002-06-04 Mark G. Fannon Selective electromagnetic wavelength conversion device
US20030003806A1 (en) * 2000-11-17 2003-01-02 Van Dulmen Hendrikus Albertus Maria Electric lamp and shaped metal body for use therein
US6633112B2 (en) * 2000-06-09 2003-10-14 General Electric Company Filament array for incandescent lamp
US6722772B2 (en) * 2001-08-16 2004-04-20 Mag Instrument, Inc. Flashlight and combination for use in aligning flashlight lamp bulbs
US6738565B2 (en) * 2001-06-30 2004-05-18 Ic Tech Co., Ltd. Halogen lamp coupling structure for electric heater
US6791247B1 (en) * 1999-11-26 2004-09-14 Koninklijke Philips Electronics N.V. Lamp
US20050207148A1 (en) * 2004-03-16 2005-09-22 Mag Instrument, Inc. Apparatus and method for aligning a substantial point source of light with a reflector feature
US20080116779A1 (en) * 2006-11-20 2008-05-22 The Aerospace Corporation Micro-nanostructured films for high efficiency thermal light emitters
US20100084972A1 (en) * 2008-10-06 2010-04-08 Shaam Sundhar High-Efficiency Light Bulb
US20100177508A1 (en) * 2009-01-14 2010-07-15 Mag Instrument, Inc. Portable Lighting Device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824995A (en) * 1953-12-29 1958-02-25 Gen Electric Electric incandescent lamp
US3082345A (en) * 1960-04-28 1963-03-19 Westinghouse Electric Corp Electric lamp
US3274426A (en) * 1962-05-07 1966-09-20 Sylvania Electric Prod Electric lamp with fuse
US3315216A (en) * 1965-08-09 1967-04-18 Gen Electric Lamp base and terminal structure
US3325665A (en) * 1962-07-06 1967-06-13 Philips Corp Electric lamp
US3351802A (en) * 1964-06-12 1967-11-07 Sylvania Electric Prod Single ended, quartz type incandescent lamp

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2824995A (en) * 1953-12-29 1958-02-25 Gen Electric Electric incandescent lamp
US3082345A (en) * 1960-04-28 1963-03-19 Westinghouse Electric Corp Electric lamp
US3274426A (en) * 1962-05-07 1966-09-20 Sylvania Electric Prod Electric lamp with fuse
US3325665A (en) * 1962-07-06 1967-06-13 Philips Corp Electric lamp
US3351802A (en) * 1964-06-12 1967-11-07 Sylvania Electric Prod Single ended, quartz type incandescent lamp
US3315216A (en) * 1965-08-09 1967-04-18 Gen Electric Lamp base and terminal structure

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3909653A (en) * 1969-05-02 1975-09-30 Westinghouse Electric Corp Compact electric incandescent lamp having planar filament and improved mount
US3885149A (en) * 1972-04-14 1975-05-20 Thorn Electrical Ind Ltd Lamp pinch seals
US4150316A (en) * 1977-01-13 1979-04-17 Gte Sylvania Incorporated Incandescent projection lamp with internal reflector having light defining opening therein
DE2821459A1 (de) * 1977-05-20 1978-11-30 Gte Sylvania Inc Wolfram-halogen-gluehlampe hoher wattleistung
US4243907A (en) * 1979-07-05 1981-01-06 Gte Products Corporation Lamp having reduced width press-seal
FR2496339A1 (fr) * 1980-12-16 1982-06-18 Philips Nv Lampe electrique a incandescence a pincement scelle au ciment dans le culot
DE3148822A1 (de) * 1980-12-16 1982-07-15 Naamloze Vennootschap Philips' Gloeilampenfabrieken, 5621 Eindhoven "elektrische gluehlampe"
US4470104A (en) * 1981-12-24 1984-09-04 General Electric Company Automotive inner-bulb assembly
US4499404A (en) * 1982-08-05 1985-02-12 General Electric Company Incandescent lamp with ceramic base
US5382805A (en) * 1993-11-01 1995-01-17 Fannon; Mark G. Double wall infrared emitter
US5471063A (en) * 1994-01-13 1995-11-28 Trojan Technologies, Inc. Fluid disinfection system
USD415103S (en) * 1998-08-06 1999-10-12 Dal Partnership Compact fluorescent bulb socket
USD415104S (en) * 1998-08-06 1999-10-12 Dal Partnership Compact fluorescent bulb socket
US6399955B1 (en) 1999-02-19 2002-06-04 Mark G. Fannon Selective electromagnetic wavelength conversion device
US6791247B1 (en) * 1999-11-26 2004-09-14 Koninklijke Philips Electronics N.V. Lamp
US6633112B2 (en) * 2000-06-09 2003-10-14 General Electric Company Filament array for incandescent lamp
US6764328B2 (en) * 2000-11-17 2004-07-20 Koninklijke Philips Electronics N.V. Electric lamp and shaped metal body for use therein
US20030003806A1 (en) * 2000-11-17 2003-01-02 Van Dulmen Hendrikus Albertus Maria Electric lamp and shaped metal body for use therein
US6738565B2 (en) * 2001-06-30 2004-05-18 Ic Tech Co., Ltd. Halogen lamp coupling structure for electric heater
US6991360B2 (en) 2001-08-16 2006-01-31 Mag Instrument, Inc. Flashlight with a light source aligned with a reflector axis
US6722772B2 (en) * 2001-08-16 2004-04-20 Mag Instrument, Inc. Flashlight and combination for use in aligning flashlight lamp bulbs
US20040165377A1 (en) * 2001-08-16 2004-08-26 Anthony Maglica Flashlight with an aligned lamp bulb
US7344269B2 (en) 2004-03-16 2008-03-18 Mag Instrument, Inc. Lighting device with variable length conductor
US20080259594A1 (en) * 2004-03-16 2008-10-23 Mag Instrument, Inc. Lighting device with variable length conductor
US20060158874A1 (en) * 2004-03-16 2006-07-20 Mag Instrument, Inc. Apparatus and method for aligning a substantial point source of light with a reflector feature
US7264372B2 (en) 2004-03-16 2007-09-04 Mag Instrument, Inc. Apparatus and method for aligning a substantial point source of light with a reflector feature
US7334914B2 (en) 2004-03-16 2008-02-26 Mag Instrument, Inc. Apparatus and method for aligning a substantial point source of light with a reflector feature
US20050207148A1 (en) * 2004-03-16 2005-09-22 Mag Instrument, Inc. Apparatus and method for aligning a substantial point source of light with a reflector feature
US8210709B2 (en) 2004-03-16 2012-07-03 Mag Instrument, Inc. Apparatus and method for aligning a substantial point source of light with a reflector feature
US20060158876A1 (en) * 2004-03-16 2006-07-20 Mag Instrument, Inc. Flashlight
US20110222273A1 (en) * 2004-03-16 2011-09-15 Mag Instrument, Inc. Lighting device with variable length conductor
US7896519B2 (en) 2004-03-16 2011-03-01 Mag Instrument, Inc. Lighting device with variable length conductor
US20110094572A1 (en) * 2006-11-20 2011-04-28 The Aerospace Corporation Thermo-photovoltaic power generator for efficiently converting thermal energy into electric energy
US20080116779A1 (en) * 2006-11-20 2008-05-22 The Aerospace Corporation Micro-nanostructured films for high efficiency thermal light emitters
US8829334B2 (en) 2006-11-20 2014-09-09 The Aerospace Corporation Thermo-photovoltaic power generator for efficiently converting thermal energy into electric energy
US20100084972A1 (en) * 2008-10-06 2010-04-08 Shaam Sundhar High-Efficiency Light Bulb
US20100177508A1 (en) * 2009-01-14 2010-07-15 Mag Instrument, Inc. Portable Lighting Device
US8366290B2 (en) 2009-01-14 2013-02-05 Mag Instrument, Inc. Portable lighting device

Also Published As

Publication number Publication date
NL6717374A (ja) 1968-07-25

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