Filament for incandescent lamps
    18.
    发明授权
    Filament for incandescent lamps 失效
    灯丝用于白炽灯

    公开(公告)号:US1800012A

    公开(公告)日:1931-04-07

    申请号:US57997822

    申请日:1922-08-07

    Applicant: GEN ELECTRIC

    Inventor: FOULKE TED E

    CPC classification number: F25B15/00 F25B15/10 H01K1/14 Y02A30/277 Y02B30/62

    Abstract: 220,045. British Thomson-Houston Co., Ltd., (General Electric Co.). May 2, 1923. Corrugating.-A hand-actuated device for angularly crimping metal strip for use in making incandescent lamp filaments consists of a lower die 19 and an upper die 20 reciprocated by hand against a retracting spring 22. Tungsten or other metal strip is laid on the lower die and is turned over between the formation of consecutive V's. The dies may be heated by a gas burner 23.

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