US2232816A - Electric lamp - Google Patents

Electric lamp Download PDF

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Publication number
US2232816A
US2232816A US314640A US31464040A US2232816A US 2232816 A US2232816 A US 2232816A US 314640 A US314640 A US 314640A US 31464040 A US31464040 A US 31464040A US 2232816 A US2232816 A US 2232816A
Authority
US
United States
Prior art keywords
bulb
neck
disc
filament
screen member
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
US314640A
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English (en)
Inventor
Irving H Van Horn
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to BE441281D priority Critical patent/BE441281A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US314640A priority patent/US2232816A/en
Priority to FR869370D priority patent/FR869370A/fr
Application granted granted Critical
Publication of US2232816A publication Critical patent/US2232816A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/52—Means for obtaining or maintaining the desired pressure within the vessel
    • H01K1/54—Means for absorbing or absorbing gas, or for preventing or removing efflorescence, e.g. by gettering
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/26—Screens; Filters

Definitions

  • My invention relates in general to. electric incandescent lamps comprising a sealed bulb containing a filament adapted to operate at a high temperature. More particularly, my invention 5 relates to a heat protective arrangement for such lamps.
  • One object otmy invention is to provide an electric incandescent lamp with a heat protecting device for shielding the bulb neck and lamp base from the heat radiated by the lamp filament.
  • Another object of my invention is to provide Still another object of my invention is to provide a relatively high-wattage reflecting type incandescent lamp employing a relatively small sized envelope.
  • a feature of the invention is the provision of a disc of insulating material in the neck ofrthe bulb between the lamp m and the filament togather with a wire screen element of cylindrical shape secured to the periphery of the insulating disc and extending longitudinally of the bulb neck to a point a relatively slight distance below the filament.
  • Fig. 1 is an elevation, 'partlyin section, of an 60 electric incandescent lamp comprising my invention
  • Fig. 2 is a perspective view or the lamp as to the invention comprises a hermetically sealed bulb It containing a gas filling such'cs nitrogen, argon 'or other suitable gas, and having a neck portion H and a base l2 secured to said neck portion.
  • the base may be of the conventional screw-threaded or any other suitable type.
  • the bulb proper is formed with a flattened top porticn l3 having a curvature of relatively large radius and a reflecting side wall portion l4 shaped to conform to a surface of any desired optical reflecting'shape such as, for instance, a m
  • the inner surface of the bulb including thegreater portion of the bulb neck, is preferably formed with a light frost. .As a result, the light rays transmitted through the top portion it are somewhat diilused.
  • This filament preferably comprises a coil formed into a i -shape with the plane of the V extending transversely of the iongitudinal axis 01' the bulb.
  • the filament is of relativelyhigh wattage such as, for instance, 300 watts or higher, and is supported at its ends by a pair oileading-in wires l1, l8 preferably of nickel.
  • leading-in wires are sealed in the pres portion 2b of an inwardly extending stem l9 and are soldered or otherwise secured to the base shell 2
  • the V-shaped filament is further. supported at its mid-point or 40 apex by a support wire 23 the lower end or which is. embedded in a button lot-med at the upper end of a glass arbor v25 extending upwardly from the stempress 20.
  • v Motmted within the neck ll of the bulb be- 46 a substantially cylindrical metal shieldor wire 50 screen member '21 disposed substantially concentrically within the bulb neck H.
  • the disc 26 is preferably made of a ceramic material commerically known as Alsimag, but it may be made'ot any ceramic possessing iairstrength'and 6t characterized by freedom frommoisture, such as centrically within the bulb neck just above the button 24 on the glass arbor 25, and is supported in such position by two support wires 28, 29 and also by the filament support wire 23.
  • the disc support wires 28, 29 are embedded at one end in the glass button 24 and extend laterally therefrom. At their outer ends, the said disc support wires are bent around the edge or periphery of I the ceramic disc, as shown at 30, so as to rigidly .clamp the same.
  • the filament support wire 23 is formed with a laterally extending bent portion 3
  • the three supports 23, 28 and 29 for the disc 26 are arranged approximately 120 apart so'as to support the disc at equally spaced points around its periphery. To prevent rotation of the ,disc, the periphery thereof is provided with notches 32 into which the support wires 23, 28 and 29 extend.
  • the disc 26 is further provided with a pair of openings 33, 33
  • the cylindrical shield or wire screen member 21 surrounds the ceramic disc 26 and extends from a point just below the filament l6 to a point opposite the stem press or thereabouts. This screen member is secured, at a point intermediate its length, to 'the periphery of the ceramic disc 26.
  • the inner surface of they screen member 21 is formed with an annular groove 35 which receives the edge of the ceramic disc'fit.
  • the wire screen member is made of suitable material, such as nickel wire, and with suitably sized mesh openings, such as, for'instance, 20 per inch.
  • the cylindrical screen member is formed from a fiat screen which is first provided with the groove
  • the ceramic disc 26 serves primarily as a heat deflector to shield the bulk neck I I, glass stem an,
  • the disc 26 being made of a ceramic material white in appearance, also serves as a. light reflector to redirect forwardly into the beam all those rays from the filament which would otherwise pass out through the bulb neck and be lost. In this manner, undesirable back-light through the uncoated portion of the bulb neck up the hot gas convection currents within the I bulb and efiectively maintains the neck and adjacent side wall portions 35 of the bulb at permissible temperatures.
  • the heat rays from the filament would be deflected by the ceramic disc 26 against the bulb neck II at points closely adjacent the periphery ofthe disc, thus causing intense localized heating of the glass at such points.
  • Such an intense localized heating would cause the reflecting coating IE to burn at suchpoints and so present an unsightly appearance, or it may result in the cracking of the glass. Consequently, the wire screen member must be employed in conjunction with, and inaddition to, the ceramic disc 26 in order to obtain eflective protection of both the bulb and the reflecting coating from the heat radiations.
  • the disc 26 should be made of a diameter approximating that of the bulb neck so that it extends across substantially the entire space within the bulb neck and substantially closes oil the same, but with its periphery slightly spaced from the inner surface of the'bulb neck.
  • the cylindrical wire screen member 21 should be of such a diameter'that, if extended, it would enclose the filament l6 as well as the leading-in wires l1, l6 and support wire 23.
  • the cylindrical screen member mounted concentrically within the bulb neck, should be of such a diameter that the lateral location of any given element of its surfacewill lie intermediate the centrally mounted filament and the bulb neck wall.
  • the wire screen member 21 should be of sumcient length, i. e., should extend a sufiicient distance towards the filament id to more or less shield from the filament the relatively sharp-curved joining portions 35 of the bulb joining the bulb neck and side wall portions H and M, respectively.
  • Such reversely curved joining portions are of little assistance in the production of the resultant light beam so that the interposition of the wire screen between the filament and such relatively inefiective joining-portions 36 does not cause any appreciable loss in the intensity of the projected beam.
  • the wire screen member 2? and ceramic disc 26 together function as a heat protective device or shield not only when the lamp is burned in a vertical base-up position, but even when the lamp is tilted to a position at an appreciable angle from vertical base-up position, such as or thereabouts.
  • the wire screerr' member 21 also serves as an eifective blackening collector when the lamp is burned in a position approximating a base-up position.
  • the wire screen collects a considerable percentage of the filament particles vaporized oi the filament during operation which might otherwise be deposited on the-bulb wall. Thus, blackening of the bulb is materially reduced with consequent maintenance of lamp efiiciency for a longer period of time.
  • a wire screen for the purpose of protecting the bulb neck and adjacent portions of the bulb side wall from the heat radiated by the filament
  • other suitable means may be employed if desired.
  • a solid metal shield in the shape of a. cup may be mounted on the ceramic disc 26 so as to face the filament It.
  • the metal cup is preferably made of a material having a surface which will reflect light so that the metal cup has the 7 additional function of a light reflector.
  • An electric incandescent lamp comprising a sealed glass bulb containing a gas fllling and having a neck portion, an electric energy translation element of relatively high wattage mount-' ed within said bulb in relatively close relation to said neck portion and normally causing overheating of said neck portion, and a heat protective device mounted within said bulb to de- 'flect'and diffuse the hot gas currents therein,
  • said device comprising a disc of refractory material mounted centrally'within said neck portion and extending transversely thereof, said disc deflecting the hot gas currents away from said neck portion, and a cylindrical wire screen member disposed substantially cencentrically within said bulb neck and extending between said disc and said translation element. said wire screen member being arranged to diffuse the hot gas currents within said neck portion and prevent over-heating thereof.
  • a reflecting electric incandescent lamp comprising a sealed glass bulb containing a gas filling and having a side wall portion and a neck porthe hot gas currents away from said neck portion, and a cylindrical wire screen member disposed substantially concentrically within said bulb neck and extending between said disc and said translation element, said wire screen member being arranged to diffuse the hot gas currents within said neck portion and prevent over-" heating oi the said neck portion and the reflecting coating thereon.
  • a reflecting electric incandescent lamp comprising a sealed glass bulb having a side wall portion and a neck portion, a continuous reflecting coating on the inner surface of said side wall and neck portions-an electric energy translation element of relatively high wattage mounted within said bulb in relatively close relation to said neck portion and normally causing overheating of said neck and adjacent side wall portions, and a heat protective device mounted 7 within said bulb to deflect and difluse the hot. gas currents therein, said device comprising a aesaerc i 3 'reflectingdisc of refractory material mounted centrally within said neck portion and substantially closing ed the same, and a cylindrical wire trically within said bulb neck and extending between said disc and said translation element. said cylindrical wire screen member being oi approximately-the same diameter as said disc with its upper edge located a relatively slight distance below said translation element.
  • a reflecting electric incandescent lamp comprising a sealed glass bulb containing a gas filling and having a side wall portion and a neck portion, a continuous reflecting coating on the inner surface of said side wall and neck portions, an electric energy translation element of relatively high wattage mounted within said bulb in rela tively close relation to said neck portion and normally causing overheating of said neck and adjacent side wall portions, and a heat protective device mounted within said bulb to deflect and diffuse the hot gas currents therein, said device I comprising a disc of refractory material mounted centrally within said neck portion and extending transversely thereof, said disc deflecting the hot gas currents away from said neck portion, and a cylindrical wire screen member surrounding said disc and secured to the periphery thereof, said wire screen member extending from said disc towards said translation element, the upper edge of said wire screen member being located a relatively slight distance below said translation element. 4
  • a reflecting electric incandescent lamp comprising a sealed glass bulb containing a gas filling and having a side wall portion, a neck portion, and an inwardly projecting stem in said neck portion, a continuous reflecting coating on the inner surface of said side 'wall and neck portions, a glass arbor extending longitudinally of said bulb from the inner end of said stem, an electric energy translation element of relatively high wattage mounted within said bulb in relatively close relation to said neck portion and normally causing overheating of said neck and adjacent side wall portions, and a heat protective device mounted within said bulb to deflect and diffuse the hot gas currents therein, said device comprising a reflecting disc of reiractorymaterial mounted centrally within said neck portion and substantially closing off the same, said disc being supported by a plurality of support wires embedded ln said glass arbor, and a cylindrical wire screen member disposed substantially concentrically within said bulb neck and extending between said disc and said translation element, said cylindrical wire screen member being of approximately the same diameteras said disc and being secured to'the periphery thereof, the

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  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
US314640A 1940-01-19 1940-01-19 Electric lamp Expired - Lifetime US2232816A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE441281D BE441281A (enrdf_load_stackoverflow) 1940-01-19
US314640A US2232816A (en) 1940-01-19 1940-01-19 Electric lamp
FR869370D FR869370A (fr) 1940-01-19 1941-01-18 Perfectionnements aux lampes à incandescence à grande puissance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US314640A US2232816A (en) 1940-01-19 1940-01-19 Electric lamp

Publications (1)

Publication Number Publication Date
US2232816A true US2232816A (en) 1941-02-25

Family

ID=23220800

Family Applications (1)

Application Number Title Priority Date Filing Date
US314640A Expired - Lifetime US2232816A (en) 1940-01-19 1940-01-19 Electric lamp

Country Status (3)

Country Link
US (1) US2232816A (enrdf_load_stackoverflow)
BE (1) BE441281A (enrdf_load_stackoverflow)
FR (1) FR869370A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592823A (en) * 1948-07-06 1952-04-15 Riccomagno Guglielmo Electric incandescent lamp
US2624019A (en) * 1950-03-31 1952-12-30 Gen Electric Electric lamp or similar article
US2859368A (en) * 1951-10-20 1958-11-04 Sylvania Electric Prod Heat lamp
US3148296A (en) * 1960-12-28 1964-09-08 Gen Electric Incandescent lamp
US3457449A (en) * 1966-06-03 1969-07-22 Philips Corp Incandescent lamp having a filament surrounded by a wire screen
US3458746A (en) * 1966-06-04 1969-07-29 Philips Corp Projection lamp with a wire screen for blackening prevention
US3471737A (en) * 1966-06-03 1969-10-07 Philips Corp Screen for lamp filament
US3798485A (en) * 1972-09-29 1974-03-19 Gen Electric Lamp apparatus for improving wall darkening characteristics
US4280076A (en) * 1978-10-18 1981-07-21 Duro-Test Corporation Incandescent lamp with structure for collecting evaporated filament material
US20060040566A1 (en) * 2004-08-18 2006-02-23 Thomas Ronald E Outgassing shield for lamp socket

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2592823A (en) * 1948-07-06 1952-04-15 Riccomagno Guglielmo Electric incandescent lamp
US2624019A (en) * 1950-03-31 1952-12-30 Gen Electric Electric lamp or similar article
US2859368A (en) * 1951-10-20 1958-11-04 Sylvania Electric Prod Heat lamp
US3148296A (en) * 1960-12-28 1964-09-08 Gen Electric Incandescent lamp
US3457449A (en) * 1966-06-03 1969-07-22 Philips Corp Incandescent lamp having a filament surrounded by a wire screen
US3471737A (en) * 1966-06-03 1969-10-07 Philips Corp Screen for lamp filament
US3458746A (en) * 1966-06-04 1969-07-29 Philips Corp Projection lamp with a wire screen for blackening prevention
US3798485A (en) * 1972-09-29 1974-03-19 Gen Electric Lamp apparatus for improving wall darkening characteristics
US4280076A (en) * 1978-10-18 1981-07-21 Duro-Test Corporation Incandescent lamp with structure for collecting evaporated filament material
US20060040566A1 (en) * 2004-08-18 2006-02-23 Thomas Ronald E Outgassing shield for lamp socket
US7121900B2 (en) * 2004-08-18 2006-10-17 Osram Sylvania Inc. Outgassing shield for lamp socket

Also Published As

Publication number Publication date
BE441281A (enrdf_load_stackoverflow)
FR869370A (fr) 1942-01-30

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