US3457449A - Incandescent lamp having a filament surrounded by a wire screen - Google Patents

Incandescent lamp having a filament surrounded by a wire screen Download PDF

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Publication number
US3457449A
US3457449A US634372A US3457449DA US3457449A US 3457449 A US3457449 A US 3457449A US 634372 A US634372 A US 634372A US 3457449D A US3457449D A US 3457449DA US 3457449 A US3457449 A US 3457449A
Authority
US
United States
Prior art keywords
screen
incandescent lamp
filament
wire
wires
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
US634372A
Other languages
English (en)
Inventor
Andreas Petrus Paulus Hinssen
Theodorus Johannes Hen Smeelen
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
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 US3457449A publication Critical patent/US3457449A/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
    • H01K1/26—Screens; Filters

Definitions

  • the present invention relates to an incandescent lamp having a filament surrounded by a screen of wire material.
  • the wire is wound generally helically, is secured to stay wires and will minimize the degree of blackening of the interior of the lamp bulb during its operation.
  • the incandescent lamp according to the present invention is characterized in that the relevant screen consists of wire material helically wound on one or more stay wires, each of the Wire turns being secured on the stay wires and the screen thus obtained being supported by one or more of the current-supply wires of the filament.
  • the wire turns of the screen are bent away from each other to a substantially bulb-shaped configuration surrounding the filament.
  • wire material can be helically wound on a winding machine around one or more parallel stay wires and the wire turns can be welded to the stay wires at the areas at which they pass these wires.
  • This technique substantially corresponds with a winding technique used for manufacturing grids for radio valves. Parts having the prescribed length can then each time be cut from the product thus obtained and can be secured on the terminal wires already provided with a filament. If desired, the wire turns may then be bent with the aid of a pair of pincers to the configuration which is most favourable for the object aimed at.
  • the wire material Wound around the stay wires will be chosen to be very thin, for example, of the order 40 1 to This wire material may suitably be constituted by molybdenum or tantalum wire.
  • the part of an incandescent lamp shown comprises the screen, the filament surrounded by the screen, and the terminal wires to which the screen and the filament are secured.
  • the terminal wires to which the screen and the filament are secured For the sake of clarity, other parts of this invention, such as the bulb and the cap, have been omitted.
  • the filament 1 is secured by its end, 2 to terminal wires 3.
  • a screen 4 surrounding the filament 1 includes the stay wires 5 and 6 around which each of the wire turns of the wire material 7 is helically wound, thereby forming the screen which is secured at areas 8.
  • the turns of the wire material 7 are bent away from each other to a bulb-shaped configuration, and the stay wire 6 is welded to a terminal wire 3.

Landscapes

  • Resistance Heating (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Wire Processing (AREA)
US634372A 1966-06-03 1967-04-27 Incandescent lamp having a filament surrounded by a wire screen Expired - Lifetime US3457449A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL6607701A NL6607701A (fr) 1966-06-03 1966-06-03
US63437267A 1967-04-27 1967-04-27

Publications (1)

Publication Number Publication Date
US3457449A true US3457449A (en) 1969-07-22

Family

ID=26644045

Family Applications (1)

Application Number Title Priority Date Filing Date
US634372A Expired - Lifetime US3457449A (en) 1966-06-03 1967-04-27 Incandescent lamp having a filament surrounded by a wire screen

Country Status (5)

Country Link
US (1) US3457449A (fr)
CH (1) CH468078A (fr)
DE (1) DE1589252A1 (fr)
GB (1) GB1143513A (fr)
NL (1) NL6607701A (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899587A (en) * 1930-10-31 1933-02-28 Gen Electric Incandescent electric lamp
US2100879A (en) * 1936-07-29 1937-11-30 Gen Electric Electric lamp
US2232816A (en) * 1940-01-19 1941-02-25 Gen Electric Electric lamp
US2300997A (en) * 1941-04-30 1942-11-03 Gen Electric Electric incandescent lamp
US2326419A (en) * 1942-12-31 1943-08-10 Gen Electric Electric lamp
US2467710A (en) * 1946-06-28 1949-04-19 Gen Electric Incandescent lamp
US2862125A (en) * 1956-01-06 1958-11-25 Sylvania Electric Prod Heat shield for incandescent lamp
US2973443A (en) * 1959-06-10 1961-02-28 Gen Electric Electric incandescent lamp
US3034007A (en) * 1959-01-23 1962-05-08 Gen Electric Electric incandescent lamp
US3184629A (en) * 1960-04-14 1965-05-18 Philips Corp Gas-filled electric lamp with a gas-directing screen

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1899587A (en) * 1930-10-31 1933-02-28 Gen Electric Incandescent electric lamp
US2100879A (en) * 1936-07-29 1937-11-30 Gen Electric Electric lamp
US2232816A (en) * 1940-01-19 1941-02-25 Gen Electric Electric lamp
US2300997A (en) * 1941-04-30 1942-11-03 Gen Electric Electric incandescent lamp
US2326419A (en) * 1942-12-31 1943-08-10 Gen Electric Electric lamp
US2467710A (en) * 1946-06-28 1949-04-19 Gen Electric Incandescent lamp
US2862125A (en) * 1956-01-06 1958-11-25 Sylvania Electric Prod Heat shield for incandescent lamp
US3034007A (en) * 1959-01-23 1962-05-08 Gen Electric Electric incandescent lamp
US2973443A (en) * 1959-06-10 1961-02-28 Gen Electric Electric incandescent lamp
US3184629A (en) * 1960-04-14 1965-05-18 Philips Corp Gas-filled electric lamp with a gas-directing screen

Also Published As

Publication number Publication date
GB1143513A (en) 1969-02-26
NL6607701A (fr) 1967-12-04
CH468078A (de) 1969-01-31
DE1589252A1 (de) 1970-03-26

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