US1717283A - Incandescent electric lamp - Google Patents

Incandescent electric lamp Download PDF

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Publication number
US1717283A
US1717283A US74115A US7411525A US1717283A US 1717283 A US1717283 A US 1717283A US 74115 A US74115 A US 74115A US 7411525 A US7411525 A US 7411525A US 1717283 A US1717283 A US 1717283A
Authority
US
United States
Prior art keywords
filament
lamp
supports
failure
conductive
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
US74115A
Other languages
English (en)
Inventor
Irving H Van Korn
Wilbur A Pipkin
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 GB262788D priority Critical patent/GB262788A/en
Application filed by General Electric Co filed Critical General Electric Co
Priority to US74115A priority patent/US1717283A/en
Priority to FR626027D priority patent/FR626027A/fr
Application granted granted Critical
Publication of US1717283A publication Critical patent/US1717283A/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
    • H01K1/62—One or more circuit elements structurally associated with the lamp
    • H01K1/70—One or more circuit elements structurally associated with the lamp with built-in short-circuiting device, e.g. for serially connected lamps

Definitions

  • Our invention relates to series electric incandescent lamps and more particularly to means for preventing the extinguishment of the lamps upon a failure of the filament of 6 one of them.
  • the situation is taken care of by providing in each lamp an automatic cut-out device similar to that shown in our pending application, Serial No. 698,502, automatic cut-outs for electric incandescent lamps, filed March 11, 1924. That device has the disadvantage that the failed lamp oes out, being short-circuited, and the other amps continue to burnat a slight increase in voltage.
  • the object of the present invention is to overcome this disadvantage.
  • the series incandescent lamp with a plurality of filaments and means for automatically cutting in the other filament when one filament fails.
  • This improvement is particularly advantageous in the case of lamps operated in series on street railway or street lighting service where current is supplied from con stant voltage supply mains.
  • Fig. 1 is a front elevation of 1 our im roved lamp
  • Fig. 2 is a side elevation thereo
  • Fig. 3 is a horizontal section along the line 33 of Fig. 1
  • Fig. 4 is a partial horizontal section on an enlarged scale of one of the bridge members
  • Fig. 5 is an elevation thereof
  • Fig. 6 is an elevation of a portion of the lamp showing the operation of our invention under one condition
  • Fig. 7 is a perspective of the film cut-out.
  • the incandescent lamp comprises a bulb 10 having the usual base 11 and stem 12 in which are sealed 9. pair of leading-in conductors and filament supports 13 and 14.
  • a filament 15 of the coiled type, and preferably. of tungsten, is clamped at the ends ofthe supports 13 and 14, and is held in position by means of a support wire 16 which is fused into a glass rod 17 extending from the stem 12.
  • An auxiliary filament 18, preferably of lower candle power than the filament 15, is clamped to the ends of the support wires 19 and 20 which extend from the button 21 formed on the rod 17.
  • the wires 19 and 20 are connected to the conductors 13 and 14 by means of the bridge members 22 and 23, which are preferably in the form of thin strips of metal )ent around the wires, as shown in Fig. 4. Between one of these members, 22 as shown, and the corres onding conductor 13, there is interposed :1. lm cut-out 24 which may be composed of sheet aluminum coated with a thin film of aluminum oxide 25. This is preferably bent around the conductor 13 so that it rigidly maintains its position.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
US74115A 1925-12-08 1925-12-08 Incandescent electric lamp Expired - Lifetime US1717283A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB262788D GB262788A (enrdf_load_stackoverflow) 1925-12-08
US74115A US1717283A (en) 1925-12-08 1925-12-08 Incandescent electric lamp
FR626027D FR626027A (fr) 1925-12-08 1926-12-07 Perfectionnements aux lampes électriques à incandescence

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74115A US1717283A (en) 1925-12-08 1925-12-08 Incandescent electric lamp

Publications (1)

Publication Number Publication Date
US1717283A true US1717283A (en) 1929-06-11

Family

ID=22117825

Family Applications (1)

Application Number Title Priority Date Filing Date
US74115A Expired - Lifetime US1717283A (en) 1925-12-08 1925-12-08 Incandescent electric lamp

Country Status (3)

Country Link
US (1) US1717283A (enrdf_load_stackoverflow)
FR (1) FR626027A (enrdf_load_stackoverflow)
GB (1) GB262788A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458756A (en) * 1967-06-12 1969-07-29 Gen Electric Incandescent flasher lamp having a cutout member connected in parallel with the filament
US9642227B2 (en) 2010-06-18 2017-05-02 Thomas & Betts International Llc Extending service life of lighting fixtures

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2719569B1 (fr) * 1994-05-03 1996-07-19 Sapal Plieuses Automatiques Installation de stockage pendulaire.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3458756A (en) * 1967-06-12 1969-07-29 Gen Electric Incandescent flasher lamp having a cutout member connected in parallel with the filament
US9642227B2 (en) 2010-06-18 2017-05-02 Thomas & Betts International Llc Extending service life of lighting fixtures

Also Published As

Publication number Publication date
GB262788A (enrdf_load_stackoverflow)
FR626027A (fr) 1927-08-25

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