Halogen incandescent lamp with high reliability filament connect

Details Halogen incandescent lamp with high reliability filament connect Halogen incandescent lamp with high reliability filament connect

1987-03-11

1989-03-14

Moore, David K.

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

313271, 313273, 313278, 313623, 445 32, 445 48, H01K 150, H01K 118

Patent

active

048127108

ABSTRACT:
To permit easy attachment of a coiled filament, and especially a coiled-c or double-twist filament, to the current supply leads within a lamp bulb, in which the current supply leads are made of tungsten, each current supply lead is flattened to form a plate-like flattened surface in the vicinity of the terminal end of the current supply lead. The secondary coiling of a coiled-coil filament--or the single coil of a single-coiled filament--is then slipped over the end portion of the lead-in to extend over and about the flattened portion and with a few turns adjacent the flattened portion and therebeyond on the end portion (15) of the current lead-in, thereby retaining the end portion in position due to the additional width of the flattened portion while providing a reliable electrical contact. The greatest width of the flattened portion is slightly greater than the inner diameter of the secondary coiling of the filament (13), for example about 5% to 20% wider.

REFERENCES:
patent: 2830217 (1958-04-01), Hodge
patent: 3069582 (1962-12-01), Reilly et al.
patent: 3148267 (1964-09-01), Moore et al.
patent: 3189778 (1965-06-01), Brundige
patent: 3440473 (1969-04-01), Smith et al.
patent: 3484644 (1969-12-01), Pertwee
patent: 3930177 (1975-12-01), Martin
patent: 4359665 (1982-11-01), Morris et al.
patent: 4366411 (1982-12-01), Robinson
patent: 4499401 (1985-02-01), Graves et al.
patent: 4568854 (1986-02-01), Westlund, Jr. et al.
patent: 4570104 (1986-02-01), Janssen et al.
patent: 4658180 (1987-04-01), Ooms
"IES Lighting Handbook", Third Edition, 1959, pp. 8-5; 8-6.

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