US2134574A - Electric incandescent lamp - Google Patents

Electric incandescent lamp Download PDF

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Publication number
US2134574A
US2134574A US160621A US16062137A US2134574A US 2134574 A US2134574 A US 2134574A US 160621 A US160621 A US 160621A US 16062137 A US16062137 A US 16062137A US 2134574 A US2134574 A US 2134574A
Authority
US
United States
Prior art keywords
filament
coiled
incandescent lamp
lamp
secured
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
US160621A
Other languages
English (en)
Inventor
Emma B Pinkle
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 NL50967D priority Critical patent/NL50967C/xx
Priority to BE429875D priority patent/BE429875A/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US160621A priority patent/US2134574A/en
Priority to FR842265D priority patent/FR842265A/fr
Priority to GB24913/38A priority patent/GB502330A/en
Application granted granted Critical
Publication of US2134574A publication Critical patent/US2134574A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/16—Electric connection thereto

Definitions

  • My invention relates to electric incandescent lamps and more particularly to'high wattage lamps. Still more particularly, my invention relates to an improved joint between the lamp filament and its leading-in conductors.
  • One of the objects ofmy invention is to provide an improved form of joint between the filament and the leading-in conductors. Another object is to provide a joint in which the end segments of the filament are effectively short-circuited. Still another object is to greatly increase the strength of the joint and to provide a good mechanical and electrical connection of the filament to the leading-in conductors.
  • Fig. 1 is an elevation of one form of incandescent lamp embodying my invention
  • Fig. 2 is an elevation, partly in section and on an enlarged scale, of a portion of the filament joint
  • Fig. 3 is a section along the line 3-3 of Fig. 1 showing a portion of the filament and its supporting structure.
  • the lamp shown therein comprises a glass bulb l0 having a base construction of the type shown and claimed in United States Patents Nos. 1,967,852 and 2,069,- 638, D. K. Wright, and consisting of a pressed glass cup portion ll having tubular bosses l2-l2 thereon to which are sealed metal thimbles l3-
  • Channel-shaped metal supports or leading-in conductors l4l4 are secured at their ends within the thimbles
  • the leads l4-I4 may be made of nickel-plated steel and may be provided with rod or wire, end portions 1937, Serial No.
  • l5-l 5 of molybdenum for example, welded thereto and extending on opposite sides of the tungsten filament It.
  • the leads are held in rigid spaced relationship by cross-bars
  • the cross-bar I1 is secured to the leads M-M by short lengths of wire l9l9 threaded through holes in the ends of the crossbar and in the leads and welded to the leads.
  • the cross-bar I8. is secured to the ends of the 10 lead extensions I5-I5 by similar wires 20-40 welded to said extensions.
  • the filament l6 illustrated in the drawing is' of the biplane type comprising a plurality of parallel coiled segments. joined by upper and 15 lower uncoiled or bight portions 2
  • the filament is supported at the top by support wires 23 having hooked lower ends engaging the upper bights 2
  • the lower bights 22 are rigidly secured, pref- 25 erably by welding, to the upper ends of anchor wires 24, the lower ends of which are rigidly secured to an insulating bridge member 25 which may be made of zircon.
  • Each of' gulde 30 wires 2626 has one end secured to the bridge 25 and the other end loosely coiled around a lead extension l5 so as to be freely slidable thereon so that the filament I6 is free to expand in a longitudinal direction and the bridge 25 moves therewith but is prevented from rotatingby the said guide wires 26 thereby preventing the segments of the filament from twisting.
  • the bridge 25 is further guided by a wire 21 secured thereto and extending through a hole in the cross-bar l8.
  • Each end of the filament I6 is wound with a coiled segment 28 (Fig. 2) over which is screwed a coil 29, preferably of tungsten wire, of substan tially the same length as the said segment 28 to short-circuit the said segment.
  • the coil 29 is 45 of the same pitch as the segment 28 and preferably is made of a wire of slightly smaller diameter.
  • a conductive support or mandrel 30 extends through the segment 28 which is securely held between a hooked end 3
  • on the end of mandrel 30 may be omitted if desired sincethe segment 28 grips the mandrel quite tightly.
  • Such a joint adds greatly to the having a coiled end portion, a coil screwed over strength of the lamp, provides a good mechanical said coiled end portion of said filament and shortand electrical connection of the filament to the circuiting the turns thereof, and a conductive leads and assures the short-circuiting of all 01' mandrel in contact with and extending through the turns in the filament end segments 28.
  • said coiled end portion or said filament and 5 What I claim as new and desire to secure by r h Said r sr $0 One d l s.
  • filament end portion and the coil thereon being 1.
  • the combination secure y d e w e sa d c ssa and the end of a conductive lead, a filament having a coiled of sa d mand e end portion, a coil screwed over said coiled end In n incandescent p.
  • the combination short-circuiting the turns thereoi. 01 a pair of spaced conductive leads, an insulating cross-bar extending between said leads, a filament EMMA B. PINKLE.

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  • Resistance Heating (AREA)
US160621A 1937-08-24 1937-08-24 Electric incandescent lamp Expired - Lifetime US2134574A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL50967D NL50967C (et) 1937-08-24
BE429875D BE429875A (et) 1937-08-24
US160621A US2134574A (en) 1937-08-24 1937-08-24 Electric incandescent lamp
FR842265D FR842265A (fr) 1937-08-24 1938-08-18 Perfectionnements aux lampes à incandescence
GB24913/38A GB502330A (en) 1937-08-24 1938-08-24 Improvements in and relating to electric incandescent lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US160621A US2134574A (en) 1937-08-24 1937-08-24 Electric incandescent lamp

Publications (1)

Publication Number Publication Date
US2134574A true US2134574A (en) 1938-10-25

Family

ID=22577657

Family Applications (1)

Application Number Title Priority Date Filing Date
US160621A Expired - Lifetime US2134574A (en) 1937-08-24 1937-08-24 Electric incandescent lamp

Country Status (5)

Country Link
US (1) US2134574A (et)
BE (1) BE429875A (et)
FR (1) FR842265A (et)
GB (1) GB502330A (et)
NL (1) NL50967C (et)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434478A (en) * 1943-12-22 1948-01-13 Westinghouse Electric Corp Incandescent electric lamp and method
US2449679A (en) * 1944-11-30 1948-09-21 Gen Electric Lamp filament support and connection
US2462325A (en) * 1947-07-12 1949-02-22 Gen Electric Filament connection for electric incandescent lamps
US2950413A (en) * 1959-03-31 1960-08-23 Gen Electric Filament connection for electric lamp or similar device
US3069582A (en) * 1960-09-27 1962-12-18 Westinghouse Electric Corp Lamp filament connection
US3221202A (en) * 1962-02-28 1965-11-30 Thorn Electrical Ind Ltd Electric incandescent lamps
US3470413A (en) * 1966-04-28 1969-09-30 Sylvania Electric Prod Projector lamp filament support
US3774065A (en) * 1971-04-17 1973-11-20 De Beeck H Op Hologen filament lamp

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434478A (en) * 1943-12-22 1948-01-13 Westinghouse Electric Corp Incandescent electric lamp and method
US2449679A (en) * 1944-11-30 1948-09-21 Gen Electric Lamp filament support and connection
US2462325A (en) * 1947-07-12 1949-02-22 Gen Electric Filament connection for electric incandescent lamps
US2950413A (en) * 1959-03-31 1960-08-23 Gen Electric Filament connection for electric lamp or similar device
US3069582A (en) * 1960-09-27 1962-12-18 Westinghouse Electric Corp Lamp filament connection
US3221202A (en) * 1962-02-28 1965-11-30 Thorn Electrical Ind Ltd Electric incandescent lamps
US3470413A (en) * 1966-04-28 1969-09-30 Sylvania Electric Prod Projector lamp filament support
US3774065A (en) * 1971-04-17 1973-11-20 De Beeck H Op Hologen filament lamp

Also Published As

Publication number Publication date
FR842265A (fr) 1939-06-08
BE429875A (et)
GB502330A (en) 1939-03-15
NL50967C (et)

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