US1998958A - Connection for filament and lead wires - Google Patents

Connection for filament and lead wires Download PDF

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Publication number
US1998958A
US1998958A US442173A US44217330A US1998958A US 1998958 A US1998958 A US 1998958A US 442173 A US442173 A US 442173A US 44217330 A US44217330 A US 44217330A US 1998958 A US1998958 A US 1998958A
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US
United States
Prior art keywords
filament
lead wires
connection
lead
leads
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
US442173A
Inventor
Jr John Flaws
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
Application filed by General Electric Co filed Critical General Electric Co
Priority to US442173A priority Critical patent/US1998958A/en
Priority to GB10056/31A priority patent/GB374986A/en
Priority to FR714732D priority patent/FR714732A/en
Application granted granted Critical
Publication of US1998958A publication Critical patent/US1998958A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K1/00Details
    • H01K1/02Incandescent bodies
    • H01K1/16Electric connection thereto

Definitions

  • My invention relates to electric incandescent lamps and similar devices which comprise a bulb or other container of glass or similar material and have mounted therein a filament or other energy translation device connected by leads to the base terminals.
  • a filament or other energy translation device connected by leads to the base terminals.
  • the flattening of said leads requires not only an additional step in manufacture but it is not suitable when the leads are composed of refractory metals. Such metals are apt to split when flattened, and
  • molybdenum which is very desirable for lead wires.
  • One of the advantages of molybdenum leads is that they may be of comparatively small diameter, thus lending elasticity and flexibility which serve to reduce the eflEect of shock.
  • the object of my invention is to provide a new form of connection which will allow the use of molybdenum lead wires and which is also of advantage where the leads are of any other metal.
  • the inner end of the lead wire is bent over on itself without flattening and in the case of a coiled filament, a portion of the clamp disposes itself between adiacent coils and a single thickness of the wire is clamped between the sections of the lead.
  • FIG. 1 is a perspective view of an electric incandescent lamp comprising my invention
  • Fig. 2 is a perspective view on an enlarged scale of the joint between the lead wire and filament
  • Fig. 3 is an elevation thereof.
  • Fig. 1 an electric incandescent lamp comprising the bulb III, the base H and the usual stem l2.
  • the filament l3 which is coiled and of tungsten is supported by the anchor wires 5 I 4, the opposite ends of which are embedded in the glass arbor l5.
  • the inner leads each comprise two sections.
  • the sections lG-l 1 may be of a metal such as nickel, While the sections l8l9 may be of molybdenum. 10 It will be obvious, however, that other metals may be used.
  • Fig. 2 is shown the joint between one of inner leads l9 and the filament [3.
  • An end portion 20 of the said inner lead is bent over or clamped against the main portion thereof but without flattening.
  • of one of the turns of the coiled tungsten filament l3, which is a single thickness thereof, is clamped between the said portions of the inner lead.
  • The-bent over portion 20 is shown as being disposed between adjacent turns of the coiled filament.
  • an electric device comprising a sealed bulb, the combination of a. closely coiled metal filament in said bulb and an inner lead connected thereto, an end portion of said inner lead being bent over on the main portion thereof without flattening and a single thickness of said filament being clamped between said portions of said inner lead, the clamping portion of said inner lead being disposed between adjacent turns of said coiled filament.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Resistance Heating (AREA)

Description

April 23,1935. FL WS, JR 1,998,958
CONIIEKJ'JION FOR FILAMENT LEAD WIRES Filed April "7, l 930 IM TUP.
Ja 'zxz FLAI/I/S, JR.
BY Wm 2 1 2-5 Ar TURN-E Y.
Patented Apr. 23, 1935 UNITED STATES PATENT OFFICE CONNECTION FOR FILAMENT AND LEAD WIRES New York Application April 7, 1930, Serial No. 442,173
1 Claim.
My invention relates to electric incandescent lamps and similar devices which comprise a bulb or other container of glass or similar material and have mounted therein a filament or other energy translation device connected by leads to the base terminals. Heretofore it has been the practice to clamp the ends of the filament to the flattened ends of the lead wires. The flattening of said leads requires not only an additional step in manufacture but it is not suitable when the leads are composed of refractory metals. Such metals are apt to split when flattened, and
this is particularly true of molybdenum which is very desirable for lead wires. One of the advantages of molybdenum leads is that they may be of comparatively small diameter, thus lending elasticity and flexibility which serve to reduce the eflEect of shock. The object of my invention is to provide a new form of connection which will allow the use of molybdenum lead wires and which is also of advantage where the leads are of any other metal.
According to my invention, the inner end of the lead wire is bent over on itself without flattening and in the case of a coiled filament, a portion of the clamp disposes itself between adiacent coils and a single thickness of the wire is clamped between the sections of the lead. Further features and advantages of my invention will appear from the description which follows and from the accompanying drawing.
In the drawing Fig. 1 is a perspective view of an electric incandescent lamp comprising my invention; Fig. 2 is a perspective view on an enlarged scale of the joint between the lead wire and filament; and Fig. 3 is an elevation thereof.
In Fig. 1 is shown an electric incandescent lamp comprising the bulb III, the base H and the usual stem l2. The filament l3 which is coiled and of tungsten is supported by the anchor wires 5 I 4, the opposite ends of which are embedded in the glass arbor l5. As shown in the drawing, the inner leads each comprise two sections. The sections lG-l 1 may be of a metal such as nickel, While the sections l8l9 may be of molybdenum. 10 It will be obvious, however, that other metals may be used.
In Fig. 2 is shown the joint between one of inner leads l9 and the filament [3. An end portion 20 of the said inner lead is bent over or clamped against the main portion thereof but without flattening. A portion 2| of one of the turns of the coiled tungsten filament l3, which is a single thickness thereof, is clamped between the said portions of the inner lead. The-bent over portion 20 is shown as being disposed between adjacent turns of the coiled filament.
What I claim as new and desire to secure by Letters Patent of the United States, is:
In an electric device comprising a sealed bulb, the combination of a. closely coiled metal filament in said bulb and an inner lead connected thereto, an end portion of said inner lead being bent over on the main portion thereof without flattening and a single thickness of said filament being clamped between said portions of said inner lead, the clamping portion of said inner lead being disposed between adjacent turns of said coiled filament.
JOHN LAws, JR.
US442173A 1930-04-07 1930-04-07 Connection for filament and lead wires Expired - Lifetime US1998958A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US442173A US1998958A (en) 1930-04-07 1930-04-07 Connection for filament and lead wires
GB10056/31A GB374986A (en) 1930-04-07 1931-04-02 Improvements in or relating to connections between filaments and leading-in wires ofelectric incandescent lamps and the like
FR714732D FR714732A (en) 1930-04-07 1931-04-03 Improvements in connections between filaments and current inputs of incandescent lamps and similar articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US442173A US1998958A (en) 1930-04-07 1930-04-07 Connection for filament and lead wires

Publications (1)

Publication Number Publication Date
US1998958A true US1998958A (en) 1935-04-23

Family

ID=23755809

Family Applications (1)

Application Number Title Priority Date Filing Date
US442173A Expired - Lifetime US1998958A (en) 1930-04-07 1930-04-07 Connection for filament and lead wires

Country Status (3)

Country Link
US (1) US1998958A (en)
FR (1) FR714732A (en)
GB (1) GB374986A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424518A (en) * 1944-12-04 1947-07-22 Gen Electric Coil electrode
US3942063A (en) * 1973-02-14 1976-03-02 U.S. Philips Corporation Incandescent lamp having increased life

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289620A (en) * 1963-10-23 1966-12-06 Goetaverken Ab Combustion furnaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424518A (en) * 1944-12-04 1947-07-22 Gen Electric Coil electrode
US3942063A (en) * 1973-02-14 1976-03-02 U.S. Philips Corporation Incandescent lamp having increased life

Also Published As

Publication number Publication date
GB374986A (en) 1932-06-23
FR714732A (en) 1931-11-19

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