FR492203A - Improvements in methods of processing filaments of incandescent lamps - Google Patents

Improvements in methods of processing filaments of incandescent lamps

Info

Publication number: FR492203A
Authority: FR; France
Prior art keywords: methods; incandescent lamps; processing filaments; filaments; processing
Prior art date: 1917-10-15
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

Application number

FR492203A

Other languages

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.)

Westinghouse Lamp Co

Original Assignee

Westinghouse Lamp 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.)

1917-10-15

Filing date

1918-10-08

Publication date

1919-07-02

1918-10-08 Application filed by Westinghouse Lamp Co filed Critical Westinghouse Lamp Co

1919-07-02 Application granted granted Critical

1919-07-02 Publication of FR492203A publication Critical patent/FR492203A/en

Status Expired legal-status Critical Current

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
- H01K3/02—Manufacture of incandescent bodies

Landscapes

Engineering & Computer Science (AREA)
Manufacturing & Machinery (AREA)
Resistance Heating (AREA)
Lighting Device Outwards From Vehicle And Optical Signal (AREA)

FR492203A 1917-10-15 1918-10-08 Improvements in methods of processing filaments of incandescent lamps Expired FR492203A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US196686A US1461140A (en)	1917-10-15	1917-10-15	Method of treating filaments for incandescent electric lamps

Publications (1)

Publication Number	Publication Date
FR492203A true FR492203A (en)	1919-07-02

Family

ID=22726417

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
FR492203A Expired FR492203A (en)	1917-10-15	1918-10-08	Improvements in methods of processing filaments of incandescent lamps

Country Status (3)

Country	Link
US (1)	US1461140A (en)
FR (1)	FR492203A (en)
GB (1)	GB120040A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3278281A (en) *	1957-09-13	1966-10-11	Westinghouse Electric Corp	Thoriated tungsten filament or wire and method of making same
US3208811A (en) *	1960-04-28	1965-09-28	Westinghouse Electric Corp	Process for flashing incandescent lamps
US3210589A (en) *	1960-04-28	1965-10-05	Westinghouse Electric Corp	Electric incandescent lamp having filament of partially recrystallized fibrous structure
US3263114A (en) *	1960-10-26	1966-07-26	Firm Egyesult Izzolampa Es Vil	Shock and vibration resistant heater for indirectly heated cathodes of radio receiving tubes
US4863527A (en) *	1987-06-05	1989-09-05	Gte Products Corporation	Process for producing doped tungsten wire with low strength and high ductility

1917
- 1917-10-15 US US196686A patent/US1461140A/en not_active Expired - Lifetime
1918
- 1918-09-24 GB GB15523/18A patent/GB120040A/en not_active Expired - Lifetime
- 1918-10-08 FR FR492203A patent/FR492203A/en not_active Expired

Also Published As

Publication number	Publication date
US1461140A (en)	1923-07-10
GB120040A (en)

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